cmd: Add gitaly-git2go command

This adds a new gitaly-git2go command that is currently intended as a
proof-of-concept for our Git2Go build framework. It thus doesn't do much
except demonstrating it's possible to link against Git2Go and its
bundled lbigit2 static archive and use its functionality. At a later
point, this is going to be the entrypoint for any Git functionality that
we want to implement via Git2Go.

2 files changed, 24 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
index 25909590c..35e7aeb1f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 /_build
 /config.mak
 /gitaly
+/gitaly-git2go
 /gitaly-hooks
 cmd/gitaly-ssh/gitaly-ssh
 /gitaly-ssh
diff --git a/cmd/gitaly-git2go/main.go b/cmd/gitaly-git2go/main.go
new file mode 100644
index 000000000..a11cfcad8
--- /dev/null
+++ b/cmd/gitaly-git2go/main.go
@@ -0,0 +1,23 @@
+package main
+
+import (
+	"os"
+
+	git "github.com/libgit2/git2go/v30"
+)
+
+func main() {
+	repo, err := git.OpenRepository(".")
+	if err != nil {
+		os.Exit(1)
+	}
+	defer repo.Free()
+
+	head, err := repo.Head()
+	if err != nil {
+		os.Exit(1)
+	}
+	defer head.Free()
+
+	println(head.Target().String())
+}