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// SPDX-License-Identifier: GPL-3.0-or-later
package ignore
import (
"os"
"os/exec"
"path/filepath"
"sort"
"strings"
"testing"
)
var oracleFiles = []string{
"a.txt", "b.log", "a1.txt", "abc", ".hidden", "foo.part", "keep.part",
"dir/c.txt", "dir/d.log", "dir/.hidden2", "dir/sub/e.txt",
"build/out.bin", "src/build/x.go", "doc/readme.md", "doc/sub/readme.md",
"deep/a/b/c/file.tmp", "x/z.txt", "x/y/z.txt", "sub/f.txt", "space name.txt",
"x]y", "xay", "xby", "a/b", "1.txt", "]a.txt",
"a.b", "xyz", "aq", "bq",
}
var oracleSets = [][]string{
{"*.log"}, {"/a.txt"}, {"build/"}, {"doc/*.md"}, {"**/readme.md"},
{"deep/**"}, {"x/**/z.txt"}, {"*.part", "!keep.part"}, {".*"},
{"a?.txt", "[ab]*.txt"}, {"[!a]*.txt"}, {"dir/", "!dir/c.txt"},
{"sub"}, {"space name.txt"}, {"*", "!*.txt"}, {"dir/**/*.txt"},
{"x[]a]y"}, {"a[/]b"}, {"[[:digit:]]*.txt"}, {"[!]a]*"},
{"a[[:punct:]]b"}, {"x[[:alpha:]]z"}, {"[a\\b]q"},
}
// TestAgainstGit compares every file and directory of a real tree against
// `git check-ignore --no-index` for each pattern set.
func TestAgainstGit(t *testing.T) {
if _, err := exec.LookPath("git"); err != nil {
t.Skip("git not installed")
}
root := t.TempDir()
t.Setenv("HOME", root)
t.Setenv("GIT_CONFIG_GLOBAL", os.DevNull)
t.Setenv("GIT_CONFIG_NOSYSTEM", "1")
for _, f := range oracleFiles {
p := filepath.Join(root, f)
if err := os.MkdirAll(filepath.Dir(p), 0o755); err != nil {
t.Fatal(err)
}
if err := os.WriteFile(p, nil, 0o644); err != nil {
t.Fatal(err)
}
}
if out, err := exec.Command("git", "-C", root, "init", "-q").CombinedOutput(); err != nil {
t.Fatalf("git init: %v %s", err, out)
}
// every path in the tree, files and directories, relative and slash-separated
var paths []string
isDir := map[string]bool{}
filepath.WalkDir(root, func(p string, d os.DirEntry, err error) error {
rel, _ := filepath.Rel(root, p)
if rel == "." || rel == ".git" || strings.HasPrefix(rel, ".git"+string(filepath.Separator)) || rel == ".gitignore" {
if rel == ".git" {
return filepath.SkipDir
}
return nil
}
rel = filepath.ToSlash(rel)
paths = append(paths, rel)
isDir[rel] = d.IsDir()
return nil
})
sort.Strings(paths)
for _, set := range oracleSets {
if err := os.WriteFile(filepath.Join(root, ".gitignore"), []byte(strings.Join(set, "\n")+"\n"), 0o644); err != nil {
t.Fatal(err)
}
cmd := exec.Command("git", "-C", root, "check-ignore", "--no-index", "--stdin")
cmd.Stdin = strings.NewReader(strings.Join(paths, "\n") + "\n")
out, _ := cmd.Output() // exit status 1 means "nothing ignored"
gitIgnored := map[string]bool{}
for _, l := range strings.Split(strings.TrimSpace(string(out)), "\n") {
if l != "" {
gitIgnored[strings.TrimSuffix(l, "/")] = true
}
}
m, err := New(set)
if err != nil {
t.Fatalf("New(%q): %v", set, err)
}
for _, p := range paths {
if got := m.Match(p, isDir[p]); got != gitIgnored[p] {
t.Errorf("patterns %q, path %q (dir=%v): krino says %v, git says %v", set, p, isDir[p], got, gitIgnored[p])
}
}
}
}
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