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/*******************************************************************************
*
* Copyright 2017 Stefan Majewsky <majewsky@gmx.net>
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*
*******************************************************************************/
package prompt
import (
"io/ioutil"
"os"
"path/filepath"
"strings"
)
//Returns empty string if `path` is not inside a Git repo.
func findRepoRootPath(path string) string {
_, err := os.Stat(filepath.Join(path, ".git"))
if err == nil {
return path
}
if path == "/" {
return ""
}
return findRepoRootPath(filepath.Dir(path))
}
func getRepoStatusField(repoRootPath string) string {
if repoRootPath == "" {
return ""
}
bytes, err := ioutil.ReadFile(filepath.Join(repoRootPath, ".git/HEAD"))
if err != nil {
handleError(err)
return withType("git", withColor("1;41", "unknown"))
}
refSpec := strings.TrimSpace(string(bytes))
//is current HEAD detached?
if !strings.HasPrefix(refSpec, "ref: refs/") {
return formatRepoStatusField(withColor("1;41", "detached"), refSpec)
}
//current HEAD is a ref
refSpec = strings.TrimPrefix(refSpec, "ref: ")
refSpecDisplay := strings.TrimPrefix(refSpec, "refs/")
refSpecDisplay = strings.TrimPrefix(refSpecDisplay, "heads/")
//read file corresponding to refspec to find commit
bytes, err = ioutil.ReadFile(filepath.Join(repoRootPath, ".git", refSpec))
commitID := strings.TrimSpace(string(bytes))
if err != nil {
handleError(err)
commitID = withColor("1;41", "unknown")
}
return formatRepoStatusField(refSpecDisplay, commitID)
}
func formatRepoStatusField(refSpec, commitID string) string {
//shorten plain commit IDs from 40 to 10 bytes
if len(commitID) == 40 && !strings.Contains(commitID, "\x1B") {
commitID = commitID[0:10]
}
return withType("git", refSpec+"/"+commitID)
}
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