From ffafde2b3eee6e13463c159b1193047df0d15dab Mon Sep 17 00:00:00 2001
From: Thomas Miceli <27960254+thomiceli@users.noreply.github.com>
Date: Mon, 4 Sep 2023 11:11:54 +0200
Subject: [PATCH] Run git gc for repositories (#90)

---
 internal/git/commands.go         | 42 ++++++++++++++++++++++++++++++++
 internal/web/admin.go            | 19 +++++++++++++++
 internal/web/run.go              |  1 +
 templates/pages/admin_index.html |  6 +++++
 4 files changed, 68 insertions(+)

diff --git a/internal/git/commands.go b/internal/git/commands.go
index c93b70f..57c9989 100644
--- a/internal/git/commands.go
+++ b/internal/git/commands.go
@@ -2,6 +2,7 @@ package git
 
 import (
 	"fmt"
+	"github.com/rs/zerolog/log"
 	"github.com/thomiceli/opengist/internal/config"
 	"os"
 	"os/exec"
@@ -263,6 +264,47 @@ func RPC(user string, gist string, service string) ([]byte, error) {
 	return stdout, err
 }
 
+func GcRepos() error {
+	subdirs, err := os.ReadDir(filepath.Join(config.GetHomeDir(), "repos"))
+	if err != nil {
+		return err
+	}
+
+	for _, subdir := range subdirs {
+		if !subdir.IsDir() {
+			continue
+		}
+
+		subRoot := filepath.Join(config.GetHomeDir(), "repos", subdir.Name())
+
+		gitRepos, err := os.ReadDir(subRoot)
+		if err != nil {
+			log.Warn().Err(err).Msg("Cannot read directory")
+			continue
+		}
+
+		for _, repo := range gitRepos {
+			if !repo.IsDir() {
+				continue
+			}
+
+			repoPath := filepath.Join(subRoot, repo.Name())
+
+			log.Info().Msg("Running git gc for repository " + repoPath)
+
+			cmd := exec.Command("git", "gc")
+			cmd.Dir = repoPath
+			err = cmd.Run()
+			if err != nil {
+				log.Warn().Err(err).Msg("Cannot run git gc for repository " + repoPath)
+				continue
+			}
+		}
+	}
+
+	return err
+}
+
 func GetGitVersion() (string, error) {
 	cmd := exec.Command("git", "--version")
 	stdout, err := cmd.Output()
diff --git a/internal/web/admin.go b/internal/web/admin.go
index c218e13..444b4a0 100644
--- a/internal/web/admin.go
+++ b/internal/web/admin.go
@@ -16,6 +16,7 @@ import (
 var (
 	syncReposFromFS = false
 	syncReposFromDB = false
+	gitGcRepos      = false
 )
 
 func adminIndex(ctx echo.Context) error {
@@ -51,6 +52,7 @@ func adminIndex(ctx echo.Context) error {
 
 	setData(ctx, "syncReposFromFS", syncReposFromFS)
 	setData(ctx, "syncReposFromDB", syncReposFromDB)
+	setData(ctx, "gitGcRepos", gitGcRepos)
 	return html(ctx, "admin_index.html")
 }
 
@@ -185,6 +187,23 @@ func adminSyncReposFromDB(ctx echo.Context) error {
 	return redirect(ctx, "/admin-panel")
 }
 
+func adminGcRepos(ctx echo.Context) error {
+	addFlash(ctx, "Garbage collecting repositories...", "success")
+	go func() {
+		if gitGcRepos {
+			return
+		}
+		gitGcRepos = true
+		if err := git.GcRepos(); err != nil {
+			log.Error().Err(err).Msg("Error garbage collecting repositories")
+			gitGcRepos = false
+			return
+		}
+		gitGcRepos = false
+	}()
+	return redirect(ctx, "/admin-panel")
+}
+
 func adminConfig(ctx echo.Context) error {
 	setData(ctx, "title", "Configuration")
 	setData(ctx, "htmlTitle", "Configuration - Admin panel")
diff --git a/internal/web/run.go b/internal/web/run.go
index 169889a..4fb827f 100644
--- a/internal/web/run.go
+++ b/internal/web/run.go
@@ -204,6 +204,7 @@ func Start() {
 			g2.POST("/gists/:gist/delete", adminGistDelete)
 			g2.POST("/sync-fs", adminSyncReposFromFS)
 			g2.POST("/sync-db", adminSyncReposFromDB)
+			g2.POST("/gc-repos", adminGcRepos)
 			g2.GET("/configuration", adminConfig)
 			g2.PUT("/set-config", adminSetConfig)
 		}
diff --git a/templates/pages/admin_index.html b/templates/pages/admin_index.html
index 27e9d69..339b878 100644
--- a/templates/pages/admin_index.html
+++ b/templates/pages/admin_index.html
@@ -68,6 +68,12 @@
                         Synchronize gists from database
                     </button>
                 </form>
+                <form action="/admin-panel/gc-repos" method="POST">
+                    {{ .csrfHtml }}
+                    <button type="submit" {{ if .gitGcRepos }}disabled="disabled"{{ end }} class="whitespace-nowrap text-slate-700 dark:text-slate-300{{ if .gitGcRepos }} text-slate-500 cursor-not-allowed {{ end }}rounded border border-gray-300 dark:border-gray-600 bg-gray-50 dark:bg-gray-800 px-2.5 py-2 text-xs font-medium text-gray-700 dark:text-white shadow-sm hover:bg-gray-100 dark:hover:bg-gray-700 hover:border-gray-500 hover:text-slate-700 dark:hover:text-slate-300 focus:outline-none focus:ring-1 focus:border-primary-500 focus:ring-primary-500 leading-3">
+                        Garbage collect git repositories
+                    </button>
+                </form>
             </div>
         </div>
     </div>