Re-re-license from AGPLv3 to the weaker copyleft OSL-3.0.

After spending too much time researching licenses, my laymen
understanding makes me feel that OSL-3.0 will be a better match given
TrailBase's rare dual use as a standalone backend or framework.

It tried to outline the reasoning in the README.md. I would appreciate
input from anyone more experienced with licenses.
For now, I would like to turn my attention back to more technical issues
:hide:.

README.md

@@ -57,10 +57,26 @@ $ docker build . -t trailbase
 ## Contributing
 
 Contributions are very welcome 🙏. Let's talk to see how a proposal fits into
-the overall roadmap and avoid surprises.
+the overall roadmap and avoid surprises. You'll also have to sign a CLA that
+retains your copyright, ensures that TrailBase will continue to be freely
+available under an OSI-approved copyleft license, and allow the TrailBase
+project to sub-license your contributions in line with more prominent projects
+such as Grafana or Element.
+This may sound presumptuous but we ain't lawyers and try to follow precedent.
 
 ## License
 
-TrailBase is free software under the terms of the [AGPLv3](LICENSE.md). If you
-require an [exception](https://www.gnu.org/philosophy/selling-exceptions.html),
-reach out to [email protected].
+TrailBase is free software under the terms of the [OSL-3.0](LICENSE).
+
+We chose this license over more popular, similar copyleft licenses such as
+AGPLv3 due to its narrower definition of derivative work that only covers
+modifications to TrailBase itself. This is akin to "GPL + classpath exception"
+and allows the use of TrailBase as a framework without inflicting licensing
+requirement on original work layered on top.
+That said, we ain't lawyers. The author of the license provides a more
+thorough [explanation](https://rosenlaw.com/OSL3.0-explained.htm).
+If you have any concerns or advice for us, please reach out.
+
+If you require an
+[exception](https://www.gnu.org/philosophy/selling-exceptions.html), reach out
+to [email protected].

client/trailbase-ts/package.json

@@ -1,7 +1,8 @@
 {
   "name": "trailbase",
-  "version": "0.1.0",
   "description": "Official TrailBase client",
+  "version": "0.1.0",
+  "license": "OSL-3.0",
   "type": "module",
   "main": "./src/index.ts",
   "publishConfig": {

trailbase-cli/Cargo.toml

@@ -2,6 +2,7 @@
 name = "trailbase-cli"
 version = "0.1.0"
 edition = "2021"
+license = "OSL-3.0"
 
 [[bin]]
 name = "trail"

trailbase-core/Cargo.toml

@@ -2,6 +2,7 @@
 name = "trailbase-core"
 version = "0.1.0"
 edition = "2021"
+license = "OSL-3.0"
 
 [[bench]]
 name = "benchmark"

trailbase-extension/Cargo.toml

@@ -2,6 +2,7 @@
 name = "trailbase-extension"
 version = "0.1.0"
 edition = "2021"
+license = "OSL-3.0"
 
 [lib]
 crate-type=["cdylib", "rlib"]

trailbase-sqlite/Cargo.toml

@@ -2,6 +2,7 @@
 name = "trailbase-sqlite"
 version = "0.1.0"
 edition = "2021"
+license = "OSL-3.0"
 
 [dependencies]
 trailbase-extension = { path = "../trailbase-extension" }