Take back control of hooks (#1006)

* git: delegate all server-side Git hooks (#1623)

* create hooks directories

* take control hooks back

* fix lint

* bug fixed and minor changes

* fix imports style

* fix migration scripts

2 files changed, 108 insertions, 4 deletions

diff --git a/cmd/hook.go b/cmd/hook.go
new file mode 100644
index 0000000000..15ad74f8e0
--- /dev/null
+++ b/cmd/hook.go
@@ -0,0 +1,106 @@
+// Copyright 2017 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"code.gitea.io/gitea/models"
+
+	"github.com/urfave/cli"
+)
+
+var (
+	// CmdHook represents the available hooks sub-command.
+	CmdHook = cli.Command{
+		Name:        "hook",
+		Usage:       "Delegate commands to corresponding Git hooks",
+		Description: "This should only be called by Git",
+		Flags: []cli.Flag{
+			cli.StringFlag{
+				Name:  "config, c",
+				Value: "custom/conf/app.ini",
+				Usage: "Custom configuration file path",
+			},
+		},
+		Subcommands: []cli.Command{
+			subcmdHookPreReceive,
+			subcmdHookUpadte,
+			subcmdHookPostReceive,
+		},
+	}
+
+	subcmdHookPreReceive = cli.Command{
+		Name:        "pre-receive",
+		Usage:       "Delegate pre-receive Git hook",
+		Description: "This command should only be called by Git",
+		Action:      runHookPreReceive,
+	}
+	subcmdHookUpadte = cli.Command{
+		Name:        "update",
+		Usage:       "Delegate update Git hook",
+		Description: "This command should only be called by Git",
+		Action:      runHookUpdate,
+	}
+	subcmdHookPostReceive = cli.Command{
+		Name:        "post-receive",
+		Usage:       "Delegate post-receive Git hook",
+		Description: "This command should only be called by Git",
+		Action:      runHookPostReceive,
+	}
+)
+
+func runHookPreReceive(c *cli.Context) error {
+	if len(os.Getenv("SSH_ORIGINAL_COMMAND")) == 0 {
+		return nil
+	}
+	if err := setup("hooks/pre-receive.log"); err != nil {
+		fail("Hook pre-receive init failed", fmt.Sprintf("setup: %v", err))
+	}
+
+	return nil
+}
+
+func runHookUpdate(c *cli.Context) error {
+	if len(os.Getenv("SSH_ORIGINAL_COMMAND")) == 0 {
+		return nil
+	}
+
+	if err := setup("hooks/update.log"); err != nil {
+		fail("Hook update init failed", fmt.Sprintf("setup: %v", err))
+	}
+
+	args := c.Args()
+	if len(args) != 3 {
+		fail("Arguments received are not equal to three", "Arguments received are not equal to three")
+	} else if len(args[0]) == 0 {
+		fail("First argument 'refName' is empty", "First argument 'refName' is empty")
+	}
+
+	uuid := os.Getenv(envUpdateTaskUUID)
+	if err := models.AddUpdateTask(&models.UpdateTask{
+		UUID:        uuid,
+		RefName:     args[0],
+		OldCommitID: args[1],
+		NewCommitID: args[2],
+	}); err != nil {
+		fail("Internal error", "Fail to add update task '%s': %v", uuid, err)
+	}
+
+	return nil
+}
+
+func runHookPostReceive(c *cli.Context) error {
+	if len(os.Getenv("SSH_ORIGINAL_COMMAND")) == 0 {
+		return nil
+	}
+
+	if err := setup("hooks/post-receive.log"); err != nil {
+		fail("Hook post-receive init failed", fmt.Sprintf("setup: %v", err))
+	}
+
+	return nil
+}
diff --git a/cmd/serve.go b/cmd/serv.go
index f4a3c3d2c6..141a58a2ac 100644
--- a/cmd/serve.go
+++ b/cmd/serv.go
@@ -30,6 +30,7 @@ import (
 const (
 	accessDenied        = "Repository does not exist or you do not have access"
 	lfsAuthenticateVerb = "git-lfs-authenticate"
+	envUpdateTaskUUID   = "GITEA_UUID"
 )
 
 // CmdServ represents the available serv sub-command.
@@ -170,7 +171,6 @@ func runServ(c *cli.Context) error {
 
 	var lfsVerb string
 	if verb == lfsAuthenticateVerb {
-
 		if !setting.LFS.StartServer {
 			fail("Unknown git command", "LFS authentication request over SSH denied, LFS support is disabled")
 		}
@@ -291,9 +291,7 @@ func runServ(c *cli.Context) error {
 	}
 
 	//LFS token authentication
-
 	if verb == lfsAuthenticateVerb {
-
 		url := fmt.Sprintf("%s%s/%s.git/info/lfs", setting.AppURL, repoUser.Name, repo.Name)
 
 		now := time.Now()
@@ -326,7 +324,7 @@ func runServ(c *cli.Context) error {
 	}
 
 	uuid := gouuid.NewV4().String()
-	os.Setenv("GITEA_UUID", uuid)
+	os.Setenv(envUpdateTaskUUID, uuid)
 	// Keep the old env variable name for backward compability
 	os.Setenv("uuid", uuid)