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hooks.go
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hooks.go
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// Copyright © 2017-2020 Olivier Robardet
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package main
import (
"fmt"
"os"
"path"
"path/filepath"
)
// Enum describing the hook creation state
const (
HookError = iota
HookCreated
HookAlreadyCreated
HookAlreadyExists
HookDeleted
HookNotExisting
HookNotMatching
)
func createGitHookLink(gitRepoPath string, hookName string) (int, error) {
currentExe, err := os.Executable()
if err != nil {
return HookError, err
}
err = os.MkdirAll(path.Join(gitRepoPath, "hooks"), 0755) // #nosec G301
if err != nil {
return HookError, err
}
hookPath := path.Join(gitRepoPath, "hooks", hookName)
// There is no hook already
fi, err := os.Lstat(hookPath)
if os.IsNotExist(err) {
err = os.Symlink(currentExe, hookPath)
if err != nil {
return HookError, err
}
} else {
// If there is a hook, maybe it's already ourself?
if fi.Mode()&os.ModeSymlink != os.ModeSymlink {
return HookAlreadyExists, nil
}
linkDest, err := os.Readlink(hookPath)
if err != nil {
return HookError, err
}
linkDest, err = filepath.Abs(linkDest)
if err != nil {
return HookError, err
}
if linkDest == currentExe {
return HookAlreadyCreated, nil
}
return HookAlreadyExists, nil
}
return HookCreated, nil
}
func deleteGitHookLink(gitRepoPath string, hookName string) (int, error) {
hookPath := path.Join(gitRepoPath, "hooks", hookName)
fi, err := os.Lstat(hookPath)
if os.IsNotExist(err) {
return HookNotExisting, nil
}
currentExe, err := os.Executable()
if err != nil {
return HookError, err
}
if fi.Mode()&os.ModeSymlink != os.ModeSymlink {
return HookNotMatching, nil
}
linkDest, err := os.Readlink(hookPath)
if err != nil {
return HookError, err
}
linkDest, err = filepath.Abs(linkDest)
if err != nil {
return HookError, err
}
if verboseMode {
fmt.Println(linkDest)
}
if linkDest == currentExe {
err = os.Remove(hookPath)
if err != nil {
return HookError, err
}
} else {
return HookNotMatching, nil
}
return HookDeleted, nil
}