From 0b2fb488e1ccb877f16bad2f413494824f43d9c8 Mon Sep 17 00:00:00 2001
From: Rutger Broekhoff
Date: Fri, 29 Dec 2023 03:19:25 +0100
Subject: Initial commit

---
 cmd/git-lfs-authenticate/main.go | 48 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 cmd/git-lfs-authenticate/main.go

(limited to 'cmd/git-lfs-authenticate/main.go')

diff --git a/cmd/git-lfs-authenticate/main.go b/cmd/git-lfs-authenticate/main.go
new file mode 100644
index 0000000..7c06a51
--- /dev/null
+++ b/cmd/git-lfs-authenticate/main.go
@@ -0,0 +1,48 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+func die(msg string, args ...any) {
+	fmt.Fprint(os.Stderr, "Error: ")
+	fmt.Fprintf(os.Stderr, msg, args...)
+	fmt.Fprint(os.Stderr, "\n")
+	os.Exit(1)
+}
+
+func main() {
+	if len(os.Args) != 3 {
+		die("expected 2 arguments [path, operation], got %d", len(os.Args)-1)
+	}
+
+	path := strings.TrimPrefix(strings.TrimSuffix(os.Args[1], ".git"), "/")
+	operation := os.Args[2]
+
+	if operation != "download" && operation != "upload" {
+		die("expected operation to be in {upload, download}, got %s", operation)
+	}
+
+	user := os.Getenv("GL_USER")
+	if user == "" {
+		die("expected Gitolite user env (GL_USER) to be set")
+	}
+
+	gitolitePerm := "R"
+	if operation == "upload" {
+		gitolitePerm = "W"
+	}
+
+	// gitolite access -q: returns only exit code
+	cmd := exec.Command("gitolite", "access", "-q", path, user, gitolitePerm)
+	err := cmd.Run()
+	permGranted := err == nil
+	var exitErr *exec.ExitError
+	if err != nil && !errors.As(err, &exitErr) {
+		die("failed to query Gitolite access information")
+	}
+}
-- 
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