Add Git library for Starlark

The Git library provides Starlark macros to easily index Go modules hosted on Git repositories. It also provides macros for services like GitHub, Bitbucket, Source Hut, Gitiles (via Gerrit)...

Signed-off-by: Nicolas Paul <n@nc0.fr>

1 files changed, 34 insertions, 0 deletions

diff --git a/pkg/config/lib/git/git.go b/pkg/config/lib/git/git.go
new file mode 100644
index 0000000..f1e0607
--- /dev/null
+++ b/pkg/config/lib/git/git.go
@@ -0,0 +1,34 @@
+// Package git provides Starlark macros to declare modules hosted on Git
+// repositories.
+package git
+
+import (
+	_ "embed"
+	"go.nc0.fr/svgu/pkg/config"
+	"go.starlark.net/starlark"
+	"go.starlark.net/starlarkstruct"
+	"sync"
+)
+
+var (
+	once = sync.Once{}
+	git  = starlark.StringDict{}
+	//go:embed git.star
+	gitFile string
+	gitErr  error
+)
+
+// LoadGitModule loads the git module.
+func LoadGitModule(t *starlark.Thread) (starlark.StringDict, error) {
+	once.Do(func() {
+		env := starlark.StringDict{
+			"module": starlark.NewBuiltin("module",
+				config.InternModule),
+			"make_module": starlark.NewBuiltin("mod",
+				starlarkstruct.MakeModule),
+		}
+		git, gitErr = starlark.ExecFile(t, "git.star", gitFile, env)
+	})
+
+	return git, gitErr
+}