1 files changed, 233 insertions, 0 deletions
diff --git a/modules/repository/hooks.go b/modules/repository/hooks.go
new file mode 100644
index 00000000..95849789
--- /dev/null
+++ b/modules/repository/hooks.go
@@ -0,0 +1,233 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package repository
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
+
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/util"
+)
+
+func getHookTemplates() (hookNames, hookTpls, giteaHookTpls []string) {
+	hookNames = []string{"pre-receive", "update", "post-receive"}
+	hookTpls = []string{
+		// for pre-receive
+		fmt.Sprintf(`#!/usr/bin/env %s
+# AUTO GENERATED BY GITEA, DO NOT MODIFY
+data=$(cat)
+exitcodes=""
+hookname=$(basename $0)
+GIT_DIR=${GIT_DIR:-$(dirname $0)/..}
+
+for hook in ${GIT_DIR}/hooks/${hookname}.d/*; do
+  test -x "${hook}" && test -f "${hook}" || continue
+  echo "${data}" | "${hook}"
+  exitcodes="${exitcodes} $?"
+done
+
+for i in ${exitcodes}; do
+  [ ${i} -eq 0 ] || exit ${i}
+done
+`, setting.ScriptType),
+
+		// for update
+		fmt.Sprintf(`#!/usr/bin/env %s
+# AUTO GENERATED BY GITEA, DO NOT MODIFY
+exitcodes=""
+hookname=$(basename $0)
+GIT_DIR=${GIT_DIR:-$(dirname $0/..)}
+
+for hook in ${GIT_DIR}/hooks/${hookname}.d/*; do
+  test -x "${hook}" && test -f "${hook}" || continue
+  "${hook}" $1 $2 $3
+  exitcodes="${exitcodes} $?"
+done
+
+for i in ${exitcodes}; do
+  [ ${i} -eq 0 ] || exit ${i}
+done
+`, setting.ScriptType),
+
+		// for post-receive
+		fmt.Sprintf(`#!/usr/bin/env %s
+# AUTO GENERATED BY GITEA, DO NOT MODIFY
+data=$(cat)
+exitcodes=""
+hookname=$(basename $0)
+GIT_DIR=${GIT_DIR:-$(dirname $0)/..}
+
+for hook in ${GIT_DIR}/hooks/${hookname}.d/*; do
+  test -x "${hook}" && test -f "${hook}" || continue
+  echo "${data}" | "${hook}"
+  exitcodes="${exitcodes} $?"
+done
+
+for i in ${exitcodes}; do
+  [ ${i} -eq 0 ] || exit ${i}
+done
+`, setting.ScriptType),
+	}
+
+	giteaHookTpls = []string{
+		// for pre-receive
+		fmt.Sprintf(`#!/usr/bin/env %s
+# AUTO GENERATED BY GITEA, DO NOT MODIFY
+%s hook --config=%s pre-receive
+`, setting.ScriptType, util.ShellEscape(setting.AppPath), util.ShellEscape(setting.CustomConf)),
+
+		// for update
+		fmt.Sprintf(`#!/usr/bin/env %s
+# AUTO GENERATED BY GITEA, DO NOT MODIFY
+%s hook --config=%s update $1 $2 $3
+`, setting.ScriptType, util.ShellEscape(setting.AppPath), util.ShellEscape(setting.CustomConf)),
+
+		// for post-receive
+		fmt.Sprintf(`#!/usr/bin/env %s
+# AUTO GENERATED BY GITEA, DO NOT MODIFY
+%s hook --config=%s post-receive
+`, setting.ScriptType, util.ShellEscape(setting.AppPath), util.ShellEscape(setting.CustomConf)),
+	}
+
+	// although only new git (>=2.29) supports proc-receive, it's still good to create its hook, in case the user upgrades git
+	hookNames = append(hookNames, "proc-receive")
+	hookTpls = append(hookTpls,
+		fmt.Sprintf(`#!/usr/bin/env %s
+# AUTO GENERATED BY GITEA, DO NOT MODIFY
+%s hook --config=%s proc-receive
+`, setting.ScriptType, util.ShellEscape(setting.AppPath), util.ShellEscape(setting.CustomConf)))
+	giteaHookTpls = append(giteaHookTpls, "")
+
+	return hookNames, hookTpls, giteaHookTpls
+}
+
+// CreateDelegateHooks creates all the hooks scripts for the repo
+func CreateDelegateHooks(repoPath string) (err error) {
+	hookNames, hookTpls, giteaHookTpls := getHookTemplates()
+	hookDir := filepath.Join(repoPath, "hooks")
+
+	for i, hookName := range hookNames {
+		oldHookPath := filepath.Join(hookDir, hookName)
+		newHookPath := filepath.Join(hookDir, hookName+".d", "gitea")
+
+		if err := os.MkdirAll(filepath.Join(hookDir, hookName+".d"), os.ModePerm); err != nil {
+			return fmt.Errorf("create hooks dir '%s': %w", filepath.Join(hookDir, hookName+".d"), err)
+		}
+
+		// WARNING: This will override all old server-side hooks
+		if err = util.Remove(oldHookPath); err != nil && !os.IsNotExist(err) {
+			return fmt.Errorf("unable to pre-remove old hook file '%s' prior to rewriting: %w ", oldHookPath, err)
+		}
+		if err = os.WriteFile(oldHookPath, []byte(hookTpls[i]), 0o777); err != nil {
+			return fmt.Errorf("write old hook file '%s': %w", oldHookPath, err)
+		}
+
+		if err = ensureExecutable(oldHookPath); err != nil {
+			return fmt.Errorf("Unable to set %s executable. Error %w", oldHookPath, err)
+		}
+
+		if err = util.Remove(newHookPath); err != nil && !os.IsNotExist(err) {
+			return fmt.Errorf("unable to pre-remove new hook file '%s' prior to rewriting: %w", newHookPath, err)
+		}
+		if err = os.WriteFile(newHookPath, []byte(giteaHookTpls[i]), 0o777); err != nil {
+			return fmt.Errorf("write new hook file '%s': %w", newHookPath, err)
+		}
+
+		if err = ensureExecutable(newHookPath); err != nil {
+			return fmt.Errorf("Unable to set %s executable. Error %w", oldHookPath, err)
+		}
+	}
+
+	return nil
+}
+
+func checkExecutable(filename string) bool {
+	// windows has no concept of a executable bit
+	if runtime.GOOS == "windows" {
+		return true
+	}
+	fileInfo, err := os.Stat(filename)
+	if err != nil {
+		return false
+	}
+	return (fileInfo.Mode() & 0o100) > 0
+}
+
+func ensureExecutable(filename string) error {
+	fileInfo, err := os.Stat(filename)
+	if err != nil {
+		return err
+	}
+	if (fileInfo.Mode() & 0o100) > 0 {
+		return nil
+	}
+	mode := fileInfo.Mode() | 0o100
+	return os.Chmod(filename, mode)
+}
+
+// CheckDelegateHooks checks the hooks scripts for the repo
+func CheckDelegateHooks(repoPath string) ([]string, error) {
+	hookNames, hookTpls, giteaHookTpls := getHookTemplates()
+
+	hookDir := filepath.Join(repoPath, "hooks")
+	results := make([]string, 0, 10)
+
+	for i, hookName := range hookNames {
+		oldHookPath := filepath.Join(hookDir, hookName)
+		newHookPath := filepath.Join(hookDir, hookName+".d", "gitea")
+
+		cont := false
+		isExist, err := util.IsExist(oldHookPath)
+		if err != nil {
+			results = append(results, fmt.Sprintf("unable to check if %s exists. Error: %v", oldHookPath, err))
+		}
+		if err == nil && !isExist {
+			results = append(results, fmt.Sprintf("old hook file %s does not exist", oldHookPath))
+			cont = true
+		}
+		isExist, err = util.IsExist(oldHookPath + ".d")
+		if err != nil {
+			results = append(results, fmt.Sprintf("unable to check if %s exists. Error: %v", oldHookPath+".d", err))
+		}
+		if err == nil && !isExist {
+			results = append(results, fmt.Sprintf("hooks directory %s does not exist", oldHookPath+".d"))
+			cont = true
+		}
+		isExist, err = util.IsExist(newHookPath)
+		if err != nil {
+			results = append(results, fmt.Sprintf("unable to check if %s exists. Error: %v", newHookPath, err))
+		}
+		if err == nil && !isExist {
+			results = append(results, fmt.Sprintf("new hook file %s does not exist", newHookPath))
+			cont = true
+		}
+		if cont {
+			continue
+		}
+		contents, err := os.ReadFile(oldHookPath)
+		if err != nil {
+			return results, err
+		}
+		if string(contents) != hookTpls[i] {
+			results = append(results, fmt.Sprintf("old hook file %s is out of date", oldHookPath))
+		}
+		if !checkExecutable(oldHookPath) {
+			results = append(results, fmt.Sprintf("old hook file %s is not executable", oldHookPath))
+		}
+		contents, err = os.ReadFile(newHookPath)
+		if err != nil {
+			return results, err
+		}
+		if string(contents) != giteaHookTpls[i] {
+			results = append(results, fmt.Sprintf("new hook file %s is out of date", newHookPath))
+		}
+		if !checkExecutable(newHookPath) {
+			results = append(results, fmt.Sprintf("new hook file %s is not executable", newHookPath))
+		}
+	}
+	return results, nil
+}