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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 (
"os"
"path/filepath"
"strings"
)
//Directory contains all data about a directory that the prompt needs.
type Directory struct {
Path string
DisplayPath string
InBuildTree bool
InRepoTree bool
Repo *gitRepo
NearestAccessiblePath string
}
//CurrentDirectory prepares a Directory struct for the current working
//directory.
func CurrentDirectory() Directory {
cwd, err := os.Getwd()
if err != nil {
cwd = filepath.Clean(os.Getenv("PWD"))
}
return NewDirectory(cwd)
}
//NewDirectory prepares a Directory struct for the given path.
func NewDirectory(path string) (dir Directory) {
dir.Path = path
dir.DisplayPath = path
//check if path actually exists
dir.NearestAccessiblePath = findNearestAccessiblePath(dir.Path)
if dir.NearestAccessiblePath == dir.Path {
//marks that everything is okay existence-wise
dir.NearestAccessiblePath = ""
//display tag if below /x/build
if buildPath := os.Getenv("BUILD_ROOT"); buildPath != "" {
rel, _ := filepath.Rel(buildPath, dir.DisplayPath)
if !strings.HasPrefix(rel, "..") && rel != "." {
dir.InBuildTree = true
dir.DisplayPath = filepath.Join("/", rel)
}
}
//display tag if below /x/src
if gopath := os.Getenv("GOPATH"); gopath != "" {
repoPath := filepath.Join(gopath, "src")
rel, _ := filepath.Rel(repoPath, dir.DisplayPath)
if !strings.HasPrefix(rel, "..") && rel != "." {
dir.InRepoTree = true
dir.DisplayPath = rel
}
}
//strip $HOME prefix if applicable and desirable
dir.stripHomeDirFromDisplay()
//check if we are inside a Git repository
var err error
dir.Repo, err = findRepo(dir.Path)
handleError(err)
}
return
}
//This part can benefit from a "return" in the middle, so it's in a separate function.
func (dir *Directory) stripHomeDirFromDisplay() {
if !strings.HasPrefix(dir.DisplayPath, "/") {
return
}
homePath := os.Getenv("HOME")
if homePath == "" {
return
}
rel, _ := filepath.Rel(homePath, dir.DisplayPath)
if rel == "." {
//do not display an empty DisplayPath if tags are displayed
if dir.InBuildTree || dir.InRepoTree {
return
}
rel = ""
}
if !strings.HasPrefix(rel, "..") {
dir.DisplayPath = rel
}
}
func findNearestAccessiblePath(path string) string {
_, err := os.Stat(path)
if err == nil {
return path
}
return findNearestAccessiblePath(filepath.Dir(path))
}
func getDirectoryField(dir Directory) string {
if dir.DisplayPath == "" {
return ""
}
txt := withColor("1;36", dir.DisplayPath)
if dir.NearestAccessiblePath == "" {
//cwd accessible -> highlight path elements inside the repo (if any)
if dir.Repo != nil && dir.Repo.RootPath != dir.Path {
rel, _ := filepath.Rel(dir.Repo.RootPath, dir.Path)
if strings.HasSuffix(dir.DisplayPath, rel) {
base := strings.TrimSuffix(dir.DisplayPath, rel)
txt = withColor("0;36", base) + withColor("1;36", rel)
}
}
} else {
//cwd inaccessible -> highlight inaccessible path elements
rel, _ := filepath.Rel(dir.NearestAccessiblePath, dir.Path)
txt = withColor("1;36", dir.NearestAccessiblePath+"/") + withColor("1;31", rel)
}
//apply tags
if dir.InRepoTree {
txt = withType("repo", txt)
}
if dir.InBuildTree {
txt = withType("build", txt)
}
return txt
}
func getDeletedMessageField(dir Directory) string {
if dir.NearestAccessiblePath == "" {
return ""
}
return withColor("1;41", "cannot stat cwd")
}
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