feat: upgrade to yarn v3

Upgrades to `yarn` v3. Changes the installation method from `npm` to
`corepack`, which is the recommended way to install yarn[^1].

Migrates `devbase` to use v3 of `yarn`, a follow up PR to stencil-base
will change the `package.json` and `.gitignore`.

[^1]: https://yarnpkg.com/getting-started/install

.gitignore

@@ -67,4 +67,5 @@ Pulumi.*.yaml
 ## <<Stencil::Block(extras)>>
 orb.*
 .version
+.yarn
 ## <</Stencil::Block>>

.yarnrc.yml

@@ -0,0 +1,3 @@
+nodeLinker: node-modules
+
+yarnPath: .yarn/releases/yarn-3.6.3.cjs

package.json

@@ -12,5 +12,6 @@
     "prettier": "^2.8.8",
     "semantic-release": "^21.0.5",
     "semver": "^7.5.2"
-  }
+  },
+  "packageManager": "[email protected]"
 }

shell/ci/env/asdf.sh

@@ -36,7 +36,6 @@ init_asdf() {
   git clone https://github.com/asdf-vm/asdf.git ~/.asdf --branch v0.12.0
 
   # langauage specifics
-  echo -e "yarn" >"$HOME/.default-npm-packages"
   echo -e "bundler 2.2.17" >"$HOME/.default-gems"
   cat >"$HOME/.default-golang-pkgs" <<EOF
 github.com/golang/protobuf/protoc-gen-go@v$(get_tool_version protoc-gen-go)

shell/ci/release/dryrun.sh

@@ -46,4 +46,4 @@ GH_TOKEN="$GH_TOKEN" yarn --frozen-lockfile semantic-release --dry-run
 
 # Handle unstable releasing for CLIs, pre-conditions for this exist
 # in the script.
-"$DIR/unstable-release.sh" --dry-run
+exec "$DIR/unstable-release.sh" --dry-run

shell/languages/nodejs.sh

@@ -7,13 +7,11 @@ source "$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)/../lib/she
 yarn_install_if_needed() {
   local stateFile="node_modules/devbase.lock"
 
-  if ! yarn -v >/dev/null 2>&1; then
-    npm install -g yarn
-  fi
-
-  if [[ ! -e "node_modules" ]]; then
-    yarn_install "$stateFile"
-    return
+  if ! command -v yarn >/dev/null; then
+    corepack enable
+    if command -v asdf >/dev/null; then
+      asdf reshim
+    fi
   fi
 
   if [[ ! -e $stateFile ]]; then

shell/lib/asdf.sh

@@ -120,6 +120,14 @@ asdf_devbase_ensure() {
       # Install the language, retrying w/ AMD64 emulation if on macOS or just retrying on failure once.
       asdf install "$plugin" "$version" || asdf_install_retry "$plugin" "$version"
     fi
+
+    if [[ $plugin == "nodejs" ]]; then
+      # Ensure that yarn is installed.
+      if ! command -v yarn >/dev/null; then
+        corepack enable
+        need_reshim=1
+      fi
+    fi
   done
 
   if [ "$need_reshim" == 1 ]; then