diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..6dac2af
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,9 @@
+version: 2
+updates:
+  - package-ecosystem: cargo
+    # Look for `Cargo.toml` and `Cargo.lock` in the root directory
+    directory: "/"
+    # Check for updates every Monday
+    schedule:
+      interval: weekly
+    open-pull-requests-limit: 2
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..af00c37
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,60 @@
+name: ci
+
+on:
+  pull_request:
+  push:
+      branches:
+        - main
+
+jobs:
+  check:
+    name: check
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [macos-latest, ubuntu-latest]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install nix
+        uses: cachix/install-nix-action@V27
+        with:
+          extra_nix_config: access-tokens = github.com=${{ github.token }}
+
+      - name: Check nix formatting
+        run: nix fmt -- -c .
+
+      - name: Set up cachix
+        uses: cachix/cachix-action@v15
+        with:
+          name: nix-community
+
+      - name: Build with nix and run checks
+        run: |
+          nix flake check
+
+  check-win:
+    name: "check windows"
+    runs-on: windows-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install Rust toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+          default: true
+      - name: Build
+        uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: --release
+
+  ci:
+    runs-on: ubuntu-latest
+    needs: [check, check-win]
+    steps:
+      - name: Aggregate of lint, and all tests
+        run: echo "ci passed"
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
new file mode 100644
index 0000000..30e1fd5
--- /dev/null
+++ b/.github/workflows/publish.yml
@@ -0,0 +1,281 @@
+name: Publish
+on:
+  push:
+    tags:
+      - 'v*'
+    branches:
+      - main
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: true
+      matrix:
+        build:
+        - aarch64
+        - aarch64-musl
+        # - i686
+        - amd64-musl
+        - amd64
+        include:
+        - build: aarch64
+          os: ubuntu-latest
+          target: aarch64-unknown-linux-gnu
+          use-cross: true
+          features: "--no-default-features --features rustls"
+        - build: aarch64-musl
+          os: ubuntu-latest
+          target: aarch64-unknown-linux-musl
+          use-cross: true
+          features: "--no-default-features --features rustls"
+        # - build: i686
+        #   os: ubuntu-latest
+        #   target: i686-unknown-linux-gnu
+        #   use-cross: true
+        #   features: "--no-default-features --features rustls"
+        - build: amd64
+          os: ubuntu-latest
+          target: x86_64-unknown-linux-gnu
+          use-cross: false
+          features: ""
+        - build: amd64-musl
+          os: ubuntu-latest
+          target: x86_64-unknown-linux-musl
+          use-cross: true
+          features: "--no-default-features --features rustls"
+    steps:
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
+        with:
+          fetch-depth: 0
+
+      - name: Install prerequisites
+        shell: bash
+        run: |
+          sudo apt-get -y update
+          case ${{ matrix.target }} in
+            arm-unknown-linux-gnueabihf) sudo apt-get -y install gcc-arm-linux-gnueabihf ;;
+            aarch64-unknown-linux-gnu) sudo apt-get -y install gcc-aarch64-linux-gnu ;;
+            aarch64-unknown-linux-musl) sudo apt-get -y install gcc-aarch64-linux-gnu ;;
+          esac
+          sudo apt-get -y install libssl-dev openssl pkg-config
+
+      - name: Extract crate information
+        shell: bash
+        run: |
+          echo "PROJECT_NAME=$(sed -n 's/^name = "\(.*\)"/\1/p' Cargo.toml | head -n1)" >> $GITHUB_ENV
+          echo "PROJECT_MAINTAINER=$(sed -n 's/^authors = \["\(.*\)"\]/\1/p' Cargo.toml)" >> $GITHUB_ENV
+          echo "PROJECT_HOMEPAGE=$(sed -n 's/^homepage = "\(.*\)"/\1/p' Cargo.toml)" >> $GITHUB_ENV
+          PROJECT_VERSION="$(sed -n 's/^version = "\(.*\)"/\1/p' Cargo.toml | head -n1)"
+          echo "PROJECT_VERSION=$PROJECT_VERSION" >> $GITHUB_ENV
+          if [[ $PROJECT_VERSION == *-pre ]]; then
+            echo "VERSION_SUFFIX=nightly" >> $GITHUB_ENV
+          else
+            echo "VERSION_SUFFIX=$PROJECT_VERSION" >> $GITHUB_ENV
+          fi
+
+      - name: Install Rust toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          target: ${{ matrix.target }}
+          override: true
+          default: true
+
+      - name: Show version information (Rust, cargo, GCC)
+        shell: bash
+        run: |
+          gcc --version || true
+          rustup -V
+          rustup toolchain list
+          rustup default
+          cargo -V
+          rustc -V
+      - name: Build
+        uses: actions-rs/cargo@v1
+        with:
+          use-cross: ${{ matrix.use-cross }}
+          command: build
+          args: ${{ matrix.features }} --release --target=${{ matrix.target }}
+
+      - name: Strip debug information from executable
+        id: strip
+        shell: bash
+        run: |
+          # Figure out what strip tool to use if any
+          STRIP="strip"
+          case ${{ matrix.target }} in
+            arm-unknown-linux-gnueabihf) STRIP="arm-linux-gnueabihf-strip" ;;
+            aarch64-unknown-linux-gnu) STRIP="aarch64-linux-gnu-strip" ;;
+            aarch64-unknown-linux-musl) STRIP="aarch64-linux-gnu-strip" ;;
+            *-pc-windows-msvc) STRIP="" ;;
+          esac;
+          # Setup paths
+          BIN_DIR="_cicd/stripped-release-bin/"
+          mkdir -p "${BIN_DIR}"
+          BIN_NAME="${{ env.PROJECT_NAME }}"
+          BIN_PATH="${BIN_DIR}/${BIN_NAME}_${{ matrix.build }}-${{ env.VERSION_SUFFIX }}"
+          # Copy the release build binary to the result location
+          cp "target/${{ matrix.target }}/release/${BIN_NAME}" "${BIN_PATH}"
+          # Also strip if possible
+          if [ -n "${STRIP}" ]; then
+            "${STRIP}" "${BIN_PATH}"
+          fi
+          # Let subsequent steps know where to find the (stripped) bin
+          echo "BIN_PATH=${BIN_PATH}" >> $GITHUB_OUTPUT
+
+      - name: Publish Release
+        id: publish
+        uses: softprops/action-gh-release@v1
+        if: startsWith(github.ref, 'refs/tags/')
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          files: |
+            ${{ steps.strip.outputs.BIN_PATH }}
+
+      - name: Publish Pre-Release
+        id: publish-pre
+        if: ${{ github.ref }} == 'refs/heads/main'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        uses: "ncipollo/release-action@v1"
+        with:
+          token: "${{ secrets.GITHUB_TOKEN }}"
+          prerelease: true
+          allowUpdates: true
+          tag: "nightly"
+          commit: "main"
+          name: "renku-cli nightly"
+          replacesArtifacts: true
+          artifacts: ${{ steps.strip.outputs.BIN_PATH }}
+
+  build-win:
+    runs-on: windows-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
+        with:
+          fetch-depth: 0
+
+      - name: Install Rust toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+          default: true
+
+      - name: Extract crate information
+        shell: bash
+        run: |
+          echo "PROJECT_NAME=$(sed -n 's/^name = "\(.*\)"/\1/p' Cargo.toml | head -n1)" >> $GITHUB_ENV
+          PROJECT_VERSION="$(sed -n 's/^version = "\(.*\)"/\1/p' Cargo.toml | head -n1)"
+          echo "PROJECT_VERSION=$PROJECT_VERSION" >> $GITHUB_ENV
+          if [[ $PROJECT_VERSION == *-pre ]]; then
+            echo "VERSION_SUFFIX=nightly" >> $GITHUB_ENV
+          else
+            echo "VERSION_SUFFIX=$PROJECT_VERSION" >> $GITHUB_ENV
+          fi
+
+      - name: Build
+        uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: ${{ matrix.features }} --release
+
+      - name: Rename binary
+        run: |
+          mv target/release/${{ env.PROJECT_NAME }}.exe target/release/${{ env.PROJECT_NAME }}-${{ env.VERSION_SUFFIX }}.exe
+
+      - name: Publish Release
+        id: publish
+        uses: softprops/action-gh-release@v1
+        if: startsWith(github.ref, 'refs/tags/')
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          files: |
+            target/release/${{ env.PROJECT_NAME }}-${{ env.VERSION_SUFFIX }}.exe
+
+      - name: Publish Pre-Release
+        id: publish-pre
+        if: ${{ github.ref }} == 'refs/heads/main'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        uses: "ncipollo/release-action@v1"
+        with:
+          token: "${{ secrets.GITHUB_TOKEN }}"
+          prerelease: true
+          allowUpdates: true
+          tag: "nightly"
+          commit: "main"
+          name: "renku-cli nightly"
+          replacesArtifacts: true
+          artifacts: target/release/${{ env.PROJECT_NAME }}-${{ env.VERSION_SUFFIX }}.exe
+
+  build-mac:
+    runs-on: macos-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
+        with:
+          fetch-depth: 0
+
+      - name: Install Rust toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          target: x86_64-apple-darwin
+          override: true
+          default: true
+
+      - name: Extract crate information
+        shell: bash
+        run: |
+          echo "PROJECT_NAME=$(sed -n 's/^name = "\(.*\)"/\1/p' Cargo.toml | head -n1)" >> $GITHUB_ENV
+          PROJECT_VERSION="$(sed -n 's/^version = "\(.*\)"/\1/p' Cargo.toml | head -n1)"
+          echo "PROJECT_VERSION=$PROJECT_VERSION" >> $GITHUB_ENV
+          if [[ $PROJECT_VERSION == *-pre ]]; then
+            echo "VERSION_SUFFIX=nightly" >> $GITHUB_ENV
+          else
+            echo "VERSION_SUFFIX=$PROJECT_VERSION" >> $GITHUB_ENV
+          fi
+
+      - name: Build
+        uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: ${{ matrix.features }} --release
+
+      - name: Rename and strip binary
+        run: |
+          strip target/release/${{ env.PROJECT_NAME }}
+          mv target/release/${{ env.PROJECT_NAME }} target/release/${{ env.PROJECT_NAME }}_darwin-${{ env.VERSION_SUFFIX }}
+
+      - name: Publish Release
+        id: publish
+        uses: softprops/action-gh-release@v1
+        if: startsWith(github.ref, 'refs/tags/')
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          prerelease: ${{ github.ref }} == "refs/heads/main"
+          files: |
+            target/release/${{ env.PROJECT_NAME }}_darwin-${{ env.VERSION_SUFFIX }}
+
+      - name: Publish Pre-Release
+        id: publish-pre
+        if: ${{ github.ref }} == 'refs/heads/main'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        uses: "ncipollo/release-action@v1"
+        with:
+          token: "${{ secrets.GITHUB_TOKEN }}"
+          prerelease: true
+          allowUpdates: true
+          tag: "nightly"
+          commit: "main"
+          name: "renku-cli nightly"
+          replacesArtifacts: true
+          artifacts: target/release/${{ env.PROJECT_NAME }}_darwin-${{ env.VERSION_SUFFIX }}
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..81ebc2c
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,6 @@
+/target
+result*
+/local
+*.qcow2
+.direnv/
+.vscode
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..0695b61
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,1887 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "addr2line"
+version = "0.22.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e4503c46a5c0c7844e948c9a4d6acd9f50cccb4de1c48eb9e291ea17470c678"
+dependencies = [
+ "gimli",
+]
+
+[[package]]
+name = "adler"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
+
+[[package]]
+name = "aho-corasick"
+version = "1.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e60d3430d3a69478ad0993f19238d2df97c507009a52b3c10addcd7f6bcb916"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "anstream"
+version = "0.6.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "418c75fa768af9c03be99d17643f93f79bbba589895012a80e3452a19ddda15b"
+dependencies = [
+ "anstyle",
+ "anstyle-parse",
+ "anstyle-query",
+ "anstyle-wincon",
+ "colorchoice",
+ "is_terminal_polyfill",
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "038dfcf04a5feb68e9c60b21c9625a54c2c0616e79b72b0fd87075a056ae1d1b"
+
+[[package]]
+name = "anstyle-parse"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c03a11a9034d92058ceb6ee011ce58af4a9bf61491aa7e1e59ecd24bd40d22d4"
+dependencies = [
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle-query"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ad186efb764318d35165f1758e7dcef3b10628e26d41a44bc5550652e6804391"
+dependencies = [
+ "windows-sys 0.52.0",
+]
+
+[[package]]
+name = "anstyle-wincon"
+version = "3.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "61a38449feb7068f52bb06c12759005cf459ee52bb4adc1d5a7c4322d716fb19"
+dependencies = [
+ "anstyle",
+ "windows-sys 0.52.0",
+]
+
+[[package]]
+name = "anyhow"
+version = "1.0.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b3d1d046238990b9cf5bcde22a3fb3584ee5cf65fb2765f454ed428c7a0063da"
+
+[[package]]
+name = "assert_cmd"
+version = "2.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed72493ac66d5804837f480ab3766c72bdfab91a65e565fc54fa9e42db0073a8"
+dependencies = [
+ "anstyle",
+ "bstr",
+ "doc-comment",
+ "predicates",
+ "predicates-core",
+ "predicates-tree",
+ "wait-timeout",
+]
+
+[[package]]
+name = "autocfg"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0c4b4d0bd25bd0b74681c0ad21497610ce1b7c91b1022cd21c80c6fbdd9476b0"
+
+[[package]]
+name = "backtrace"
+version = "0.3.73"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5cc23269a4f8976d0a4d2e7109211a419fe30e8d88d677cd60b6bc79c5732e0a"
+dependencies = [
+ "addr2line",
+ "cc",
+ "cfg-if",
+ "libc",
+ "miniz_oxide",
+ "object",
+ "rustc-demangle",
+]
+
+[[package]]
+name = "base64"
+version = "0.22.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
+
+[[package]]
+name = "bitflags"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b048fb63fd8b5923fc5aa7b340d8e156aec7ec02f0c78fa8a6ddc2613f6f71de"
+
+[[package]]
+name = "bstr"
+version = "1.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05efc5cfd9110c8416e471df0e96702d58690178e206e61b7173706673c93706"
+dependencies = [
+ "memchr",
+ "regex-automata",
+ "serde",
+]
+
+[[package]]
+name = "bumpalo"
+version = "3.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "79296716171880943b8470b5f8d03aa55eb2e645a4874bdbb28adb49162e012c"
+
+[[package]]
+name = "bytes"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "514de17de45fdb8dc022b1a7975556c53c86f9f0aa5f534b98977b171857c2c9"
+
+[[package]]
+name = "camino"
+version = "1.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e0ec6b951b160caa93cc0c7b209e5a3bff7aae9062213451ac99493cd844c239"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "cargo-platform"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "24b1f0365a6c6bb4020cd05806fd0d33c44d38046b8bd7f0e40814b9763cabfc"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "cargo_metadata"
+version = "0.18.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d886547e41f740c616ae73108f6eb70afe6d940c7bc697cb30f13daec073037"
+dependencies = [
+ "camino",
+ "cargo-platform",
+ "semver",
+ "serde",
+ "serde_json",
+ "thiserror",
+]
+
+[[package]]
+name = "cc"
+version = "1.0.101"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac367972e516d45567c7eafc73d24e1c193dcf200a8d94e9db7b3d38b349572d"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "clap"
+version = "4.5.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5db83dced34638ad474f39f250d7fea9598bdd239eaced1bdf45d597da0f433f"
+dependencies = [
+ "clap_builder",
+ "clap_derive",
+]
+
+[[package]]
+name = "clap_builder"
+version = "4.5.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7e204572485eb3fbf28f871612191521df159bc3e15a9f5064c66dba3a8c05f"
+dependencies = [
+ "anstream",
+ "anstyle",
+ "clap_lex",
+ "strsim",
+ "terminal_size",
+]
+
+[[package]]
+name = "clap_complete"
+version = "4.5.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fbca90c87c2a04da41e95d1856e8bcd22f159bdbfa147314d2ce5218057b0e58"
+dependencies = [
+ "clap",
+]
+
+[[package]]
+name = "clap_derive"
+version = "4.5.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c780290ccf4fb26629baa7a1081e68ced113f1d3ec302fa5948f1c381ebf06c6"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "clap_lex"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4b82cf0babdbd58558212896d1a4272303a57bdb245c2bf1147185fb45640e70"
+
+[[package]]
+name = "colorchoice"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b6a852b24ab71dffc585bcb46eaf7959d175cb865a7152e35b348d1b2960422"
+
+[[package]]
+name = "console"
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..37b4c7e
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,38 @@
+[package]
+name = "renku-cli"
+description = "A command line interface to the Renku platform"
+homepage = "https://renkulab.io/"
+version = "0.1.0-nightly"
+edition = "2021"
+license = "Apache-2.0"
+repository = "https://github.com/SwissDatascienceCenter/renku-cli"
+keywords = [ "renku", "cli" ]
+categories = [ "command-line-utilities" ]
+build = "build.rs"
+
+# See more keys and their definitions at
+# https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+clap = { version = "4.5.7", features = ["derive", "wrap_help"] }
+clap_complete = "4.5.6"
+console = {version = "0.15.8"}
+env_logger = { version = "0.11.3" }
+log = { version = "0.4.21" }
+openssl = { version = "0.10.64", optional = true }
+reqwest = { version = "0.12.5", default-features = false, features = ["json", "blocking", "multipart"] }
+serde = { version = "1.0.203", features = ["derive"] }
+serde_json = "1.0.118"
+snafu = { version = "0.8.3" }
+
+[features]
+default = ["reqwest/default-tls"] # link against system library
+rustls = ["reqwest/rustls-tls"] # include rustls, ssl library written in rust
+vendored-openssl = ["openssl/vendored"] # include compiled openssl library
+
+[dev-dependencies]
+assert_cmd = "2.0.14"
+predicates = "3.1.0"
+
+[build-dependencies]
+vergen = { version = "8.3.1", features = ["build", "git", "gitcl", "rustc", "cargo"] }
diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
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+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
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+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
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+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
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+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
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+   4. Redistribution. You may reproduce and distribute copies of the
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+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
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+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
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+      (d) If the Work includes a "NOTICE" text file as part of its
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+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
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+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
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+
+   Unless required by applicable law or agreed to in writing, software
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diff --git a/README.md b/README.md
new file mode 100644
index 0000000..bb1a525
--- /dev/null
+++ b/README.md
@@ -0,0 +1,83 @@
+# preliminary docs
+
+# Goal
+
+- [x] outline of cli app
+- [x] some tests
+- [x] github ci workflows:
+  - [x] for publishing (what/how exactly? assume to upload a binary to
+        the github release page)
+  - [x] for testing an all platforms
+- [ ] add tokio and async all the things
+- [ ] nice to have: clone a project / repo
+  - the notion document talks about clonig a project first, then
+    another sentence mentions cloning repositories
+  - which is it? if project, how is cloning multiple repos supposed to
+    work? and is there anything else than `git clone` to be done?
+- [ ] think better what is `pub` and what is not, thinking about
+      providing a rust library alongside the cli maybe
+- [ ] publish musl builds with dynamically linking to openssl (perhaps
+      using this https://github.com/rust-cross/rust-musl-cross)
+- [ ] figure how to cross compile using nix to make it better reproducible
+
+## Design/Outline
+
+- it currently is a single application crate
+  - it might be better to start with a multi project?
+  - we might want to add tooling, like creating man pages etc
+  - it could also be consumed as a library 
+- the cli uses clap as the argument parsing library, which comes
+  batteries-included provding a lot of convenience features out of the
+  box
+- the main command does nothing by itself, but will always accept a sub-command
+- the main accepts only a few flags that provide data common to all sub-commands
+- all sub commands are write to stdout/stderr at some point, which is captured in the trait `Cmd`
+- when writing the resulting values, they should implement `Sink` in
+  order to have a consistent output - currently json for machine
+  reading and "default" for humans (using the `Display` trait)
+- sub commands can themselves accept sub commands (simply recursing),
+  the `project` command exists as an example
+- serde macros are used to provide JSON de/serializer
+- all commands should support two types of output: json and "human
+  readable", so the cli can be used in scripts and as a user
+- reqwest is used to run http requests
+  - the module `httpclient` implements a higher level http client
+    adopted to renkus remote api
+  - currently, I opted for the synchronous variant, because:
+    - it results in simpler code
+    - right now there is no command doing lots of (io bound)
+      operations that would result in significant performance gain.
+      When we need to run many many requests/doing lots of io things,
+      then we should probably introduce tokio and use the async
+      variant of reqwest
+- errors are encoded per module (currently transparent) and can be
+  amended with context using Snafu, creating a hierarchy
+- the `assert_cmd` crate is used to provide integration tests
+- the `env_log` library is used for logging, it prints to stderr by
+  default which is useful to provide extra information the user can
+  opt-in via the `-v(vv)` flags
+
+## Adding a new sub command
+
+1. Implement the command analogous to others in `src/cli/cmd/my_sub.rs`
+2. Add a new variant to `SubCommand` enum in `opts.rs`
+3. Follow the compile errors:
+   - in `cli.rs` run the command
+   - in `cmd.rs` add another `From` impl for the error (if necessary)
+
+## git 
+
+There are the following ways to do git operations:
+
+- git2-rs: requires either to link to an exisitng libgit2 or include
+  the library in the binary
+  - pro: uses what git uses
+  - con: may involve installing a dependency with the cli, api may be
+    influenced by the C one
+- gitoxide: a library entirely implemented in rust 
+  - pro: looks fancy, rust api is probably nicer to work with
+  - con: not what git uses…, not all features supported
+- use the existing git binary
+  - pro: smaller binary
+  - con: requires managing external processes (which should be easy in
+    rust, though), requires git as dependency
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..f4ba71b
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,11 @@
+use vergen::EmitBuilder;
+
+pub fn main() {
+    EmitBuilder::builder()
+        .all_build()
+        .all_git()
+        .all_cargo()
+        .all_rustc()
+        .emit()
+        .unwrap();
+}
diff --git a/deny.toml b/deny.toml
new file mode 100644
index 0000000..09a4898
--- /dev/null
+++ b/deny.toml
@@ -0,0 +1,10 @@
+[licenses]
+allow = [
+  "MIT",
+  "Apache-2.0",
+  "0BSD",
+  "Unicode-DFS-2016"
+]
+
+[advisories]
+version = 2
\ No newline at end of file
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..1935b82
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,121 @@
+{
+  "nodes": {
+    "advisory-db": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1718755832,
+        "narHash": "sha256-bSY6HPtJ9vCp0AGjL5X910aTg0mq32p3BcJmZQkNkMs=",
+        "owner": "rustsec",
+        "repo": "advisory-db",
+        "rev": "8eb99abe8c369b48bbd4ca04133e1f05be22a778",
+        "type": "github"
+      },
+      "original": {
+        "owner": "rustsec",
+        "repo": "advisory-db",
+        "type": "github"
+      }
+    },
+    "crane": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1718730147,
+        "narHash": "sha256-QmD6B6FYpuoCqu6ZuPJH896ItNquDkn0ulQlOn4ykN8=",
+        "owner": "ipetkov",
+        "repo": "crane",
+        "rev": "32c21c29b034d0a93fdb2379d6fabc40fc3d0e6c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ipetkov",
+        "repo": "crane",
+        "type": "github"
+      }
+    },
+    "fenix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "rust-analyzer-src": []
+      },
+      "locked": {
+        "lastModified": 1717827974,
+        "narHash": "sha256-ixopuTeTouxqTxfMuzs6IaRttbT8JqRW5C9Q/57WxQw=",
+        "owner": "nix-community",
+        "repo": "fenix",
+        "rev": "ab655c627777ab5f9964652fe23bbb1dfbd687a8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "fenix",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1718710757,
+        "narHash": "sha256-zzHTI7iQByeuGDto16eRwPflCf3xfVOJJSB0/cnEd2s=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "56fc115880db6498245adecda277ccdb33025bc2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "advisory-db": "advisory-db",
+        "crane": "crane",
+        "fenix": "fenix",
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..3c0a4c7
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,165 @@
+{
+  description = "Build a cargo project";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+
+    crane = {
+      url = "github:ipetkov/crane";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    fenix = {
+      url = "github:nix-community/fenix";
+      inputs.nixpkgs.follows = "nixpkgs";
+      inputs.rust-analyzer-src.follows = "";
+    };
+
+    flake-utils.url = "github:numtide/flake-utils";
+
+    advisory-db = {
+      url = "github:rustsec/advisory-db";
+      flake = false;
+    };
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    crane,
+    fenix,
+    flake-utils,
+    advisory-db,
+    ...
+  }:
+    flake-utils.lib.eachDefaultSystem (system: let
+      pkgs = nixpkgs.legacyPackages.${system};
+
+      inherit (pkgs) lib;
+
+      craneLib = crane.mkLib pkgs;
+      src = craneLib.cleanCargoSource ./.;
+
+      # Common arguments can be set here to avoid repeating them later
+      commonArgs = {
+        inherit src;
+        strictDeps = true;
+
+        nativeBuildInputs = [
+          pkgs.pkg-config
+        ];
+        buildInputs =
+          [
+            # Add additional build inputs here
+            pkgs.openssl
+          ]
+          ++ lib.optionals pkgs.stdenv.isDarwin [
+            # Additional darwin specific inputs can be set here
+            pkgs.libiconv
+            pkgs.darwin.apple_sdk.frameworks.Security
+          ];
+
+        # Additional environment variables can be set directly
+        # MY_CUSTOM_VAR = "some value";
+      };
+
+      craneLibLLvmTools =
+        craneLib.overrideToolchain
+        (fenix.packages.${system}.complete.withComponents [
+          "cargo"
+          "llvm-tools"
+          "rustc"
+        ]);
+
+      # Build *just* the cargo dependencies, so we can reuse
+      # all of that work (e.g. via cachix) when running in CI
+      cargoArtifacts = craneLib.buildDepsOnly commonArgs;
+
+      # Build the actual crate itself, reusing the dependency
+      # artifacts from above.
+      my-crate = craneLib.buildPackage (commonArgs
+        // {
+          inherit cargoArtifacts;
+          # additional arguments to cargo for building the app, --release is already there
+          cargoExtraArgs = "";
+        });
+    in {
+      checks = {
+        # Build the crate as part of `nix flake check` for convenience
+        inherit my-crate;
+
+        # Run clippy (and deny all warnings) on the crate source,
+        # again, reusing the dependency artifacts from above.
+        #
+        # Note that this is done as a separate derivation so that
+        # we can block the CI if there are issues here, but not
+        # prevent downstream consumers from building our crate by itself.
+        my-crate-clippy = craneLib.cargoClippy (commonArgs
+          // {
+            inherit cargoArtifacts;
+            cargoClippyExtraArgs = "--all-targets -- --deny warnings";
+          });
+
+        my-crate-doc = craneLib.cargoDoc (commonArgs
+          // {
+            inherit cargoArtifacts;
+          });
+
+        # Check formatting
+        my-crate-fmt = craneLib.cargoFmt {
+          inherit src;
+        };
+
+        # Audit dependencies
+        my-crate-audit = craneLib.cargoAudit {
+          inherit src advisory-db;
+        };
+
+        # Audit licenses
+        my-crate-deny = craneLib.cargoDeny {
+          inherit src;
+        };
+
+        # Run tests with cargo-nextest
+        # Consider setting `doCheck = false` on `my-crate` if you do not want
+        # the tests to run twice
+        my-crate-nextest = craneLib.cargoNextest (commonArgs
+          // {
+            inherit cargoArtifacts;
+            partitions = 1;
+            partitionType = "count";
+          });
+      };
+
+      packages =
+        {
+          default = my-crate;
+        }
+        // lib.optionalAttrs (!pkgs.stdenv.isDarwin) {
+          my-crate-llvm-coverage = craneLibLLvmTools.cargoLlvmCov (commonArgs
+            // {
+              inherit cargoArtifacts;
+            });
+        };
+
+      apps.default = flake-utils.lib.mkApp {
+        drv = my-crate;
+      };
+
+      formatter = pkgs.alejandra;
+
+      devShells.default = craneLib.devShell {
+        # Inherit inputs from checks.
+        checks = self.checks.${system};
+
+        # Additional dev-shell environment variables can be set directly
+        # MY_CUSTOM_DEVELOPMENT_VAR = "something else";
+        RENKU_CLI_RENKU_URL = "https://ci-renku-3668.dev.renku.ch";
+
+        # Extra inputs can be added here; cargo and rustc are provided by default.
+        packages = with pkgs; [
+          cargo-edit
+        ];
+      };
+    });
+}
diff --git a/src/cli.rs b/src/cli.rs
new file mode 100644
index 0000000..b60652d
--- /dev/null
+++ b/src/cli.rs
@@ -0,0 +1,58 @@
+pub mod cmd;
+pub mod opts;
+pub mod sink;
+
+use self::cmd::{Cmd, CmdError, Context};
+use self::opts::{MainOpts, SubCommand};
+use clap::CommandFactory;
+use serde::Serialize;
+use std::fmt;
+
+pub fn execute_cmd(opts: MainOpts) -> Result<(), CmdError> {
+    let ctx = Context::new(&opts.common_opts)?;
+
+    log::info!("Running command: {:?}", opts.subcmd);
+    match &opts.subcmd {
+        SubCommand::Version(input) => input.exec(&ctx)?,
+        SubCommand::ShellCompletion(input) => {
+            let mut app = MainOpts::command();
+            input.print_completions(&mut app);
+        }
+        SubCommand::Project(input) => input.exec(&ctx)?,
+    };
+    Ok(())
+}
+
+#[derive(Debug, Serialize)]
+pub struct BuildInfo {
+    pub build_date: &'static str,
+    pub build_version: &'static str,
+    pub git_commit: &'static str,
+    pub rustc_host_triple: &'static str,
+    pub rustc_llvm_version: &'static str,
+    pub rustc_version: &'static str,
+    pub cargo_target_triple: &'static str,
+}
+impl Default for BuildInfo {
+    fn default() -> Self {
+        BuildInfo {
+            build_date: env!("VERGEN_BUILD_TIMESTAMP"),
+            build_version: env!("CARGO_PKG_VERSION"),
+            git_commit: env!("VERGEN_GIT_SHA"),
+            rustc_host_triple: env!("VERGEN_RUSTC_HOST_TRIPLE"),
+            rustc_llvm_version: env!("VERGEN_RUSTC_LLVM_VERSION"),
+            rustc_version: env!("VERGEN_RUSTC_SEMVER"),
+            cargo_target_triple: env!("VERGEN_CARGO_TARGET_TRIPLE"),
+        }
+    }
+}
+impl fmt::Display for BuildInfo {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let cc = &self.git_commit[..8];
+        write!(
+            f,
+            "  Built at: {}\n  Version: {}\n  Sha: {}",
+            self.build_date, self.build_version, cc
+        )
+    }
+}
diff --git a/src/cli/cmd.rs b/src/cli/cmd.rs
new file mode 100644
index 0000000..763d2ff
--- /dev/null
+++ b/src/cli/cmd.rs
@@ -0,0 +1,106 @@
+pub mod project;
+pub mod shell_completion;
+pub mod version;
+
+use super::sink::{Error as SinkError, Sink};
+use crate::cli::opts::{CommonOpts, Format, ProxySetting};
+use crate::httpclient::{self, proxy, Client};
+use serde::Serialize;
+use snafu::{ResultExt, Snafu};
+
+pub trait Cmd {
+    type CmdError;
+
+    fn exec(&self, args: &Context) -> Result<(), Self::CmdError>;
+}
+
+pub struct Context<'a> {
+    pub opts: &'a CommonOpts,
+    pub client: Client,
+    pub renku_url: String,
+}
+
+const RENKULABIO: &str = "https://renkulab.io";
+
+impl Context<'_> {
+    pub fn new(opts: &CommonOpts) -> Result<Context, CmdError> {
+        let base_url = get_renku_url(opts);
+        let client = Client::new(&base_url, proxy_settings(opts), &None, false)
+            .context(ContextCreateSnafu)?;
+        Ok(Context {
+            opts,
+            client,
+            renku_url: base_url,
+        })
+    }
+
+    /// A short hand for `Sink::write(self.format(), value)`
+    fn write_result<A: Sink + Serialize>(&self, value: A) -> Result<(), SinkError> {
+        let fmt = self.format();
+        Sink::write(fmt, &value)
+    }
+
+    fn format(&self) -> Format {
+        self.opts.format.unwrap_or(Format::Default)
+    }
+}
+
+fn get_renku_url(opts: &CommonOpts) -> String {
+    match &opts.renku_url {
+        Some(u) => {
+            log::debug!("Use renku url from arguments: {}", u);
+            u.clone()
+        }
+        None => match std::env::var("RENKU_CLI_RENKU_URL").ok() {
+            Some(u) => {
+                log::debug!("Use renku url from env RENKU_CLI_RENKU_URL: {}", u);
+                u
+            }
+            None => {
+                log::debug!("Use renku url: https://renkulab.io");
+                RENKULABIO.to_string()
+            }
+        },
+    }
+}
+
+fn proxy_settings(opts: &CommonOpts) -> proxy::ProxySetting {
+    let user = opts.proxy_user.clone();
+    let password = opts.proxy_password.clone();
+    let prx = opts.proxy.clone();
+
+    log::debug!("Using proxy: {:?} @ {:?}", user, prx);
+    match prx {
+        None => proxy::ProxySetting::System,
+        Some(ProxySetting::None) => proxy::ProxySetting::None,
+        Some(ProxySetting::Custom { url }) => proxy::ProxySetting::Custom {
+            url: url.clone(),
+            user,
+            password,
+        },
+    }
+}
+
+#[derive(Debug, Snafu)]
+pub enum CmdError {
+    #[snafu(display("ContextCreate - {}", source))]
+    ContextCreate { source: httpclient::Error },
+
+    #[snafu(display("Version - {}", source))]
+    Version { source: version::Error },
+
+    #[snafu(display("Project - {}", source))]
+    Project { source: project::Error },
+}
+
+impl From<version::Error> for CmdError {
+    fn from(source: version::Error) -> Self {
+        CmdError::Version { source }
+    }
+}
+
+impl From<project::Error> for CmdError {
+    fn from(source: project::Error) -> Self {
+        CmdError::Project { source }
+    }
+}
diff --git a/src/cli/cmd/project.rs b/src/cli/cmd/project.rs
new file mode 100644
index 0000000..2869fa6
--- /dev/null
+++ b/src/cli/cmd/project.rs
@@ -0,0 +1,33 @@
+pub mod clone;
+
+use super::{Cmd, Context};
+use clap::Parser;
+use snafu::{ResultExt, Snafu};
+
+#[derive(Debug, Snafu)]
+pub enum Error {
+    Clone { source: clone::Error },
+}
+
+/// Sub command for managing projects
+#[derive(Parser, Debug)]
+pub struct Input {
+    #[command(subcommand)]
+    pub subcmd: ProjectCommand,
+}
+
+impl Cmd for Input {
+    type CmdError = Error;
+
+    fn exec(&self, ctx: &Context) -> Result<(), Error> {
+        match &self.subcmd {
+            ProjectCommand::Clone(input) => input.exec(ctx).context(CloneSnafu),
+        }
+    }
+}
+
+#[derive(Parser, Debug)]
+pub enum ProjectCommand {
+    #[command()]
+    Clone(clone::Input),
+}
diff --git a/src/cli/cmd/project/clone.rs b/src/cli/cmd/project/clone.rs
new file mode 100644
index 0000000..7f94700
--- /dev/null
+++ b/src/cli/cmd/project/clone.rs
@@ -0,0 +1,24 @@
+use super::{Cmd, Context};
+
+use clap::Parser;
+use snafu::Snafu;
+
+/// Clone a project
+#[derive(Parser, Debug)]
+pub struct Input {
+    /// The project slug
+    pub slug: String,
+}
+
+impl Cmd for Input {
+    type CmdError = Error;
+
+    fn exec(&self, _ctx: &Context) -> Result<(), Error> {
+        Ok(())
+    }
+}
+
+#[derive(Debug, Snafu)]
+pub enum Error {
+    Dummy,
+}
diff --git a/src/cli/cmd/shell_completion.rs b/src/cli/cmd/shell_completion.rs
new file mode 100644
index 0000000..73f43da
--- /dev/null
+++ b/src/cli/cmd/shell_completion.rs
@@ -0,0 +1,42 @@
+use clap::{Command, Parser, ValueEnum};
+use clap_complete::{generate, Generator, Shell};
+
+/// Generates completions for some shells.
+///
+#[derive(Parser, std::fmt::Debug)]
+pub struct Input {
+    /// For which shell to generate completions.
+    #[arg(long, value_enum)]
+    pub shell: GeneratorChoice,
+
+    /// The binary name.
+    #[arg(long, default_value = "renku-cli")]
+    pub binary: String,
+}
+
+#[derive(ValueEnum, Clone, Debug, PartialEq)]
+pub enum GeneratorChoice {
+    Bash,
+    Elvish,
+    Fish,
+    #[value(name = "powershell")]
+    PowerShell,
+    Zsh,
+}
+
+impl Input {
+    pub fn print_completions(&self, app: &mut Command) {
+        let binary = &self.binary;
+        match &self.shell {
+            GeneratorChoice::Bash => generate_completions(Shell::Bash, binary, app),
+            GeneratorChoice::Elvish => generate_completions(Shell::Elvish, binary, app),
+            GeneratorChoice::Fish => generate_completions(Shell::Fish, binary, app),
+            GeneratorChoice::PowerShell => generate_completions(Shell::PowerShell, binary, app),
+            GeneratorChoice::Zsh => generate_completions(Shell::Zsh, binary, app),
+        }
+    }
+}
+
+fn generate_completions<G: Generator>(gen: G, binary: &str, app: &mut Command) {
+    generate(gen, app, binary, &mut std::io::stdout());
+}
diff --git a/src/cli/cmd/version.rs b/src/cli/cmd/version.rs
new file mode 100644
index 0000000..971c4f0
--- /dev/null
+++ b/src/cli/cmd/version.rs
@@ -0,0 +1,69 @@
+use super::{Cmd, Context};
+use crate::cli::sink::Error as SinkError;
+use crate::cli::sink::Sink;
+use crate::cli::BuildInfo;
+use crate::httpclient::data::VersionInfo;
+use crate::httpclient::Error as HttpError;
+use clap::Parser;
+use serde::Serialize;
+use snafu::{ResultExt, Snafu};
+use std::fmt;
+
+/// Prints version about server and client.
+///
+/// Queries the server for its version information and prints more
+/// version details about this client.
+#[derive(Parser, Debug, PartialEq)]
+pub struct Input {}
+
+#[derive(Debug, Snafu)]
+pub enum Error {
+    #[snafu(display("An http error occurred: {}", source))]
+    HttpClient { source: HttpError },
+
+    #[snafu(display("Error writing data: {}", source))]
+    WriteResult { source: SinkError },
+}
+
+impl Cmd for Input {
+    type CmdError = Error;
+
+    fn exec(&self, ctx: &Context) -> Result<(), Error> {
+        let result = ctx
+            .client
+            .version(ctx.opts.verbose > 1)
+            .context(HttpClientSnafu)?;
+        let vinfo = Versions::create(result, &ctx.renku_url);
+        ctx.write_result(vinfo).context(WriteResultSnafu)?;
+        Ok(())
+    }
+}
+
+#[derive(Debug, Serialize)]
+pub struct Versions<'a> {
+    pub client: BuildInfo,
+    pub server: VersionInfo,
+    pub renku_url: &'a str,
+}
+impl Versions<'_> {
+    pub fn create(server: VersionInfo, renku_url: &str) -> Versions {
+        Versions {
+            client: BuildInfo::default(),
+            server,
+            renku_url,
+        }
+    }
+}
+
+impl fmt::Display for Versions<'_> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let hc = &self.server.search.head_commit[..8];
+        write!(
+            f,
+            "Client:\n{}\n\nRenku @ {}\n  Data Services: {}\n  Search Services: {} ({})",
+            self.client, self.renku_url, self.server.data.version, self.server.search.version, hc
+        )
+    }
+}
+
+impl Sink for Versions<'_> {}
diff --git a/src/cli/opts.rs b/src/cli/opts.rs
new file mode 100644
index 0000000..86206b5
--- /dev/null
+++ b/src/cli/opts.rs
@@ -0,0 +1,96 @@
+use super::cmd::*;
+use clap::{ArgAction, ArgGroup, Parser, ValueEnum, ValueHint};
+use serde::{Deserialize, Serialize};
+use std::str::FromStr;
+
+/// Main options are available to all commands. They must appear
+/// before a sub-command.
+#[derive(Parser, Debug)]
+#[command(group = ArgGroup::new("tls"))]
+pub struct CommonOpts {
+    /// Be more verbose when logging. Verbosity increases with each
+    /// occurence of that option.
+    #[arg(short, long, action = ArgAction::Count)]
+    pub verbose: u8,
+
+    /// How to format the output. The default is human readable which
+    /// may choose to not show every detail for better readability.
+    /// The json output format can be used to always show all details
+    /// in a structured form.
+    #[arg(short, long, value_enum)]
+    pub format: Option<Format>,
+
+    /// The (base) URL to Renku. It can be given as environment
+    /// variable RENKU_CLI_RENKU_URL.
+    #[arg(long, value_hint = ValueHint::Url)]
+    pub renku_url: Option<String>,
+
+    /// Set a proxy to use for doing http requests. By default, the
+    /// system proxy will be used. Can be either `none` or <url>. If
+    /// `none`, the system proxy will be ignored; otherwise specify
+    /// the proxy url, like `http://myproxy.com`.
+    #[arg(long)]
+    pub proxy: Option<ProxySetting>,
+
+    /// The user to authenticate at the proxy.
+    #[arg(long)]
+    pub proxy_user: Option<String>,
+
+    /// The password to authenticate at the proxy.
+    #[arg(long)]
+    pub proxy_password: Option<String>,
+}
+
+#[derive(Parser, Debug)]
+pub enum SubCommand {
+    #[command()]
+    Version(version::Input),
+
+    #[command()]
+    ShellCompletion(shell_completion::Input),
+
+    #[command()]
+    Project(project::Input),
+}
+
+/// This is the command line interface to the Renku platform. Main
+/// options are available to all sub-commands and must appear before
+/// them. Each sub command has its own set of flags/options and
+/// arguments.
+#[derive(Parser, Debug)]
+#[command(name = "renku-cli", version)]
+pub struct MainOpts {
+    #[clap(flatten)]
+    pub common_opts: CommonOpts,
+
+    #[clap(subcommand)]
+    pub subcmd: SubCommand,
+}
+
+/// The format for presenting the results.
+#[derive(ValueEnum, Debug, Copy, Clone, Serialize, Deserialize)]
+pub enum Format {
+    Json,
+    Default,
+}
+
+#[derive(Parser, Debug, Clone, Serialize, Deserialize)]
+pub enum ProxySetting {
+    /// Don't use any proxy; this will also discard the system proxy.
+    None,
+
+    /// Use a custom defined proxy.
+    Custom { url: String },
+}
+
+impl FromStr for ProxySetting {
+    type Err = String;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        if s.eq_ignore_ascii_case("none") {
+            Ok(ProxySetting::None)
+        } else {
+            Ok(ProxySetting::Custom { url: s.to_string() })
+        }
+    }
+}
diff --git a/src/cli/sink.rs b/src/cli/sink.rs
new file mode 100644
index 0000000..d7369e6
--- /dev/null
+++ b/src/cli/sink.rs
@@ -0,0 +1,33 @@
+use crate::cli::opts::Format;
+use serde::Serialize;
+use snafu::Snafu;
+use std::fmt::Display;
+
+#[derive(Debug, Snafu)]
+pub enum Error {
+    Json { source: serde_json::Error },
+}
+
+pub trait Sink
+where
+    Self: Serialize + Display,
+{
+    fn write(format: Format, value: &Self) -> Result<(), Error> {
+        match format {
+            Format::Json => {
+                serde_json::to_writer(std::io::stdout(), &value)?;
+                Ok(())
+            }
+            Format::Default => {
+                println!("{}", &value);
+                Ok(())
+            }
+        }
+    }
+}
+
+impl From<serde_json::Error> for Error {
+    fn from(e: serde_json::Error) -> Error {
+        Error::Json { source: e }
+    }
+}
diff --git a/src/error.rs b/src/error.rs
new file mode 100644
index 0000000..a1eab22
--- /dev/null
+++ b/src/error.rs
@@ -0,0 +1,18 @@
+//! Global error types
+
+use crate::cli::cmd;
+use snafu::Snafu;
+
+#[derive(Debug, Snafu)]
+pub enum Error {
+    #[snafu(display("{}", source))]
+    Cmd { source: cmd::CmdError },
+}
+
+pub type Result<A> = std::result::Result<A, Error>;
+
+impl From<cmd::CmdError> for Error {
+    fn from(e: cmd::CmdError) -> Error {
+        Error::Cmd { source: e }
+    }
+}
diff --git a/src/httpclient.rs b/src/httpclient.rs
new file mode 100644
index 0000000..91c50e3
--- /dev/null
+++ b/src/httpclient.rs
@@ -0,0 +1,139 @@
+//! A http client for renku
+//!
+//! Provides a http client to Renku based on reqwest.
+//!
+//! # Usage
+//!
+//! ```rust
+//! use renku_cli::httpclient;
+//! let client = httpclient::Client::new(
+//!    "https://renkulab.io",
+//!    httpclient::proxy::ProxySetting::System,
+//!    &None,
+//!    false
+//! ).unwrap();
+//! println!("{:?}", client.version(false));
+//! ```
+//!
+//! # Authentication
+//!
+//! TODO
+
+pub mod data;
+pub mod proxy;
+
+use self::data::*;
+use reqwest::blocking::ClientBuilder;
+use reqwest::Certificate;
+use serde::de::DeserializeOwned;
+use snafu::{ResultExt, Snafu};
+use std::path::PathBuf;
+
+const USER_AGENT: &str = concat!(env!("CARGO_PKG_NAME"), "/", env!("CARGO_PKG_VERSION"));
+
+#[derive(Debug, Snafu)]
+pub enum Error {
+    #[snafu(display("An error was received from {}: {}", url, source))]
+    Http { source: reqwest::Error, url: String },
+
+    #[snafu(display("An error occurred creating the http client: {}", source))]
+    ClientCreate { source: reqwest::Error },
+
+    #[snafu(display("Error opening file '{}': {}", path.display(), source))]
+    OpenFile {
+        source: std::io::Error,
+        path: PathBuf,
+    },
+
+    #[snafu(display("An error occured reading the response: {}", source))]
+    DeserializeResp { source: reqwest::Error },
+
+    #[snafu(display("An error occured reading the response: {}", source))]
+    DeserializeJson { source: serde_json::Error },
+}
+
+/// The renku http client.
+///
+/// This wraps a reqwest client with methods corresonding to renku api
+/// endpoints.
+pub struct Client {
+    client: reqwest::blocking::Client,
+    base_url: String,
+}
+
+impl Client {
+    pub fn new<S: Into<String>>(
+        renku_url: S,
+        proxy: proxy::ProxySetting,
+        trusted_certificate: &Option<PathBuf>,
+        accept_invalid_certs: bool,
+    ) -> Result<Client, Error> {
+        let url = renku_url.into();
+        log::debug!("Create renku client for: {}", url);
+        let mut client_builder = ClientBuilder::new().user_agent(USER_AGENT);
+        client_builder = proxy.set(client_builder).context(ClientCreateSnafu)?;
+        match trusted_certificate {
+            Some(cert_file) => {
+                log::debug!(
+                    "Adding extra certificate from file: {}",
+                    cert_file.display(),
+                );
+                let buf = std::fs::read(cert_file).context(OpenFileSnafu { path: cert_file })?;
+                let cert = match Certificate::from_pem(&buf) {
+                    Ok(c) => c,
+                    Err(e) => {
+                        log::debug!("Reading PEM format failed: {:?}. Try with DER", e);
+                        Certificate::from_der(&buf).context(ClientCreateSnafu)?
+                    }
+                };
+                client_builder = client_builder.add_root_certificate(cert);
+            }
+            None => {
+                if accept_invalid_certs {
+                    log::info!("NOTE: ignoring invalid certificates!");
+                    client_builder = client_builder.danger_accept_invalid_certs(true);
+                }
+            }
+        }
+
+        let client = client_builder.build().context(ClientCreateSnafu)?;
+        Ok(Client {
+            client,
+            base_url: url,
+        })
+    }
+
+    /// Runs a GET request to the given url. When `debug` is true, the
+    /// response is first decoded into utf8 chars and logged at debug
+    /// level. Otherwise bytes are directly decoded from JSON into the
+    /// expected structure.
+    fn json_get<R: DeserializeOwned>(&self, path: &str, debug: bool) -> Result<R, Error> {
+        let url = &format!("{}{}", self.base_url, path);
+        if debug {
+            let resp = self
+                .client
+                .get(url)
+                .send()
+                .context(HttpSnafu { url })?
+                .text()
+                .context(DeserializeRespSnafu)?;
+            log::debug!("GET {} -> {}", url, resp);
+            serde_json::from_str::<R>(&resp).context(DeserializeJsonSnafu)
+        } else {
+            self.client
+                .get(url)
+                .send()
+                .context(HttpSnafu { url })?
+                .json::<R>()
+                .context(DeserializeRespSnafu)
+        }
+    }
+
+    /// Queries Renku for its version
+    pub fn version(&self, debug: bool) -> Result<VersionInfo, Error> {
+        let data = self.json_get::<SimpleVersion>("/ui-server/api/data/version", debug)?;
+        let search =
+            self.json_get::<SearchServiceVersion>("/ui-server/api/search/version", debug)?;
+        Ok(VersionInfo { search, data })
+    }
+}
diff --git a/src/httpclient/data.rs b/src/httpclient/data.rs
new file mode 100644
index 0000000..6569a74
--- /dev/null
+++ b/src/httpclient/data.rs
@@ -0,0 +1,24 @@
+//! Defines data structures for requests and responses and their
+//! `De/Serialize` instances.
+
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct SearchServiceVersion {
+    pub name: String,
+    pub version: String,
+    #[serde(alias = "headCommit")]
+    pub head_commit: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct SimpleVersion {
+    pub version: String,
+}
+
+/// Describes the version information provided by the renku platform.
+#[derive(Debug, Serialize, Deserialize)]
+pub struct VersionInfo {
+    pub search: SearchServiceVersion,
+    pub data: SimpleVersion,
+}
diff --git a/src/httpclient/proxy.rs b/src/httpclient/proxy.rs
new file mode 100644
index 0000000..c5db05a
--- /dev/null
+++ b/src/httpclient/proxy.rs
@@ -0,0 +1,40 @@
+use reqwest::blocking::ClientBuilder;
+use reqwest::{Proxy, Result};
+
+pub enum ProxySetting {
+    System,
+    None,
+    Custom {
+        url: String,
+        user: Option<String>,
+        password: Option<String>,
+    },
+}
+
+impl ProxySetting {
+    pub fn set(&self, builder: ClientBuilder) -> Result<ClientBuilder> {
+        match self {
+            ProxySetting::System => {
+                log::debug!("Using system proxy (no changes to client)");
+                Ok(builder)
+            }
+            ProxySetting::None => {
+                log::info!("Setting no_proxy");
+                Ok(builder.no_proxy())
+            }
+            ProxySetting::Custom {
+                url,
+                user,
+                password,
+            } => {
+                log::info!("Using proxy: {:?}", url);
+                let mut p = Proxy::all(url)?;
+                if let Some(login) = user {
+                    log::debug!("Use proxy auth: {:?}/***", login);
+                    p = p.basic_auth(login.as_str(), password.as_ref().unwrap_or(&"".into()));
+                }
+                Ok(builder.proxy(p))
+            }
+        }
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..6bfb7ad
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,17 @@
+pub mod cli;
+pub mod error;
+pub mod httpclient;
+
+pub use cli::execute_cmd;
+
+use clap::Parser;
+use cli::opts::MainOpts;
+
+/// Reads the program arguments into the `MainOpts` data structure.
+pub fn read_args() -> MainOpts {
+    log::debug!("Parsing command line options…");
+    let m = MainOpts::parse();
+
+    log::debug!("Parsed options: {:?}", m);
+    m
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..ec51697
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,52 @@
+use renku_cli::error::{Error, Result};
+use std::env;
+use std::process;
+
+const LOG_LEVEL: &str = "RUST_LOG";
+
+fn main() {
+    let error_style = console::Style::new().red().bright();
+    let result = execute();
+    if let Err(err) = result {
+        eprintln!("{}", error_style.apply_to(&err));
+        process::exit(exit_code(&err));
+    }
+}
+
+fn execute() -> Result<()> {
+    let opts = renku_cli::read_args();
+    let remove_env = match opts.common_opts.verbose {
+        1 => set_log_level("info"),
+        n => {
+            if n > 1 {
+                set_log_level("debug")
+            } else {
+                false
+            }
+        }
+    };
+    env_logger::init();
+
+    let result = renku_cli::execute_cmd(opts);
+    if remove_env {
+        env::remove_var(LOG_LEVEL);
+    }
+    result?;
+    Ok(())
+}
+
+fn set_log_level(level: &str) -> bool {
+    let current = env::var_os(LOG_LEVEL);
+    if current.is_none() {
+        env::set_var(LOG_LEVEL, level);
+        true
+    } else {
+        false
+    }
+}
+
+fn exit_code(err: &Error) -> i32 {
+    match err {
+        Error::Cmd { source: _ } => 1,
+    }
+}
diff --git a/tests/common/mod.rs b/tests/common/mod.rs
new file mode 100644
index 0000000..9467b0e
--- /dev/null
+++ b/tests/common/mod.rs
@@ -0,0 +1,33 @@
+use assert_cmd::cargo::CargoError;
+use assert_cmd::prelude::*;
+use std::{io, process::Command};
+
+#[derive(Debug)]
+pub enum Error {
+    Cargo(CargoError),
+    IO(io::Error),
+    Json(serde_json::Error),
+}
+impl std::convert::From<CargoError> for Error {
+    fn from(e: CargoError) -> Self {
+        Error::Cargo(e)
+    }
+}
+impl std::convert::From<io::Error> for Error {
+    fn from(e: io::Error) -> Self {
+        Error::IO(e)
+    }
+}
+impl std::convert::From<serde_json::Error> for Error {
+    fn from(e: serde_json::Error) -> Self {
+        Error::Json(e)
+    }
+}
+
+pub type Result<A> = std::result::Result<A, Error>;
+
+pub fn mk_cmd() -> Result<Command> {
+    let mut cmd = Command::cargo_bin("renku-cli")?;
+    cmd.args(["--renku-url", "https://ci-renku-3668.dev.renku.ch"]); //use mock url?
+    Ok(cmd)
+}
diff --git a/tests/version.rs b/tests/version.rs
new file mode 100644
index 0000000..bc2a1a4
--- /dev/null
+++ b/tests/version.rs
@@ -0,0 +1,32 @@
+mod common;
+use crate::common::*;
+use assert_cmd::prelude::*;
+use predicates::prelude::*;
+use renku_cli::cli::BuildInfo;
+
+#[test]
+#[ignore = "needs a server"]
+fn version_json_cmd() -> Result<()> {
+    let mut cmd = mk_cmd()?;
+    let assert = cmd.args(["-f", "json"]).arg("version").assert();
+
+    let res = serde_json::from_slice::<serde_json::Value>(
+        assert.success().stderr("").get_output().stdout.as_slice(),
+    )?;
+    assert!(res.get("client").is_some());
+    assert!(res.get("server").is_some());
+    assert!(res["server"].get("data").is_some());
+    assert!(res["server"].get("search").is_some());
+    Ok(())
+}
+
+#[test]
+#[ignore = "needs a server"]
+fn version_default_cmd() -> Result<()> {
+    let cmd = mk_cmd()?.arg("version").unwrap();
+    let info = BuildInfo::default();
+    cmd.assert()
+        .stderr("")
+        .stdout(predicate::str::is_match(format!("Version: {}", info.build_version)).unwrap());
+    Ok(())
+}