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package app
import (
"io/ioutil"
"os"
"path/filepath"
)
// generateDirectories returns possible git repositories to pipe into git pkg
// load function
func generateDirectories(dirs []string, depth int) []string {
gitDirs := make([]string, 0)
for i := 0; i < depth; i++ {
directories, repositories := walkRecursive(dirs, gitDirs)
dirs = directories
gitDirs = repositories
}
return gitDirs
}
// returns given values, first search directories and second stands for possible
// git repositories. Call this func from a "for i := 0; i<depth; i++" loop
func walkRecursive(search, appendant []string) ([]string, []string) {
max := len(search)
for i := 0; i < max; i++ {
if i >= len(search) {
continue
}
// find possible repositories and remaining ones, b slice is possible ones
a, b, err := separateDirectories(search[i])
if err != nil {
continue
}
// since we started to search let's get rid of it and remove from search
// array
search[i] = search[len(search)-1]
search = search[:len(search)-1]
// lets append what we have found to continue recursion
search = append(search, a...)
appendant = append(appendant, b...)
}
return search, appendant
}
// separateDirectories is to find all the files in given path. This method
// does not check if the given file is a valid git repositories
func separateDirectories(directory string) ([]string, []string, error) {
dirs := make([]string, 0)
gitDirs := make([]string, 0)
files, err := ioutil.ReadDir(directory)
// can we read the directory?
if err != nil {
return nil, nil, nil
}
for _, f := range files {
repo := directory + string(os.PathSeparator) + f.Name()
file, err := os.Open(repo)
// if we cannot open it, simply continue to iteration and don't consider
if err != nil {
file.Close()
continue
}
dir, err := filepath.Abs(file.Name())
if err != nil {
file.Close()
continue
}
// with this approach, we ignore submodule or sub repositories in a git repository
ff, err := os.Open(dir + string(os.PathSeparator) + ".git")
if err != nil {
dirs = append(dirs, dir)
} else {
gitDirs = append(gitDirs, dir)
}
ff.Close()
file.Close()
}
return dirs, gitDirs, nil
}
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