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+1
-1
@@ -22,7 +22,7 @@ builds:
|
||||
flags:
|
||||
- -trimpath
|
||||
ldflags:
|
||||
- -s -w -X main.version={{ .Version }}
|
||||
- -s -w -X main.version={{ .Version }} -X main.commit={{ .ShortCommit }} -X main.branch={{ .Branch }}
|
||||
goos:
|
||||
- linux
|
||||
- darwin
|
||||
|
||||
@@ -2,13 +2,14 @@
|
||||
|
||||
```
|
||||
gosh - Go Shell
|
||||
Version: 0.2.1 (branch: main, commit: 03e791c)
|
||||
|
||||
Built-in commands:
|
||||
cd [dir] - Change directory (cd with no args goes to home)
|
||||
pwd - Print working directory
|
||||
echo [args] - Echo arguments
|
||||
exit [code] - Exit shell with optional status code
|
||||
quit [code] - Quit shell with optional status code
|
||||
exit [code] - Exit shell with status code (default: $?)
|
||||
quit [code] - Quit shell with status code (default: $?)
|
||||
set VAR=val - Set environment variable
|
||||
export VAR=val - Export environment variable
|
||||
help - Show this help
|
||||
@@ -22,15 +23,122 @@ Features:
|
||||
override with $GOSH_HISTFILE); lines starting with a space are not saved
|
||||
- Tab completion for commands and file paths
|
||||
- Tilde expansion (~, ~/path) at the start of unquoted words
|
||||
- Wildcards: * ? [abc] [a-z] [!abc] match file names (not hidden files
|
||||
unless the pattern starts with a dot); quoted wildcards and values of
|
||||
variables are not expanded, a pattern without match is kept as is
|
||||
- Colored prompt (user@host green, red for root; directory blue),
|
||||
configurable with $GOSH_COLORS, e.g. GOSH_COLORS='user=1;33:path=36'
|
||||
(keys user, root, path; values are ANSI SGR codes, empty = no color);
|
||||
disabled with $NO_COLOR, TERM=dumb or when output is not a terminal
|
||||
- Environment variable expansion ($VAR, ${VAR}, ${VAR:-default});
|
||||
using an unset variable is an error, use ${VAR:-} for an empty default
|
||||
- Command lists: a ; b (run both), a && b (b only if a succeeded),
|
||||
a || b (b only if a failed); $? is the exit status of the last command
|
||||
- Pipes (a | b) and redirections: < file, > file, >> file, 2> file,
|
||||
2>> file, 2>&1, >&2, &> file (stdout and stderr), &>> file
|
||||
- Non-interactive use: gosh -c 'command', gosh script, command | gosh;
|
||||
the exit status is the one of the last command
|
||||
|
||||
```
|
||||
|
||||
### Aufruf
|
||||
|
||||
```
|
||||
gosh [-l] [-i] [script]
|
||||
gosh [-l] -c command
|
||||
gosh -version
|
||||
```
|
||||
|
||||
| Aufruf | Verhalten |
|
||||
|------------------------|------------------------------------------------------------------|
|
||||
| `gosh` | interaktive Shell (wenn stdin ein Terminal ist) |
|
||||
| `gosh -c 'befehl'` | führt den Befehl aus und beendet sich |
|
||||
| `gosh skript.gosh` | führt das Skript Zeile für Zeile aus |
|
||||
| `befehle \| gosh` | liest die Befehle von stdin |
|
||||
| `-i` | erzwingt den interaktiven Modus, auch ohne Terminal |
|
||||
| `-l`, `--login` | Login-Shell (wird akzeptiert, eine Startdatei gibt es noch nicht) |
|
||||
|
||||
Ohne Terminal bricht gosh bei einem fehlgeschlagenen Befehl nicht ab und beendet sich mit dem Exit-Status des letzten Befehls: `127`, wenn ein Befehl nicht gefunden wurde, `126`, wenn er nicht ausführbar ist, `128+n`, wenn er durch Signal `n` beendet wurde. Leere Zeilen und Zeilen, die mit `#` beginnen, werden übersprungen, Skripte können also mit `#!/usr/bin/gosh` beginnen.
|
||||
|
||||
Damit funktionieren auch `ssh host befehl`, `scp` und `rsync`, wenn gosh als Login-Shell gesetzt ist. Befehle lassen sich mit `;`, `&&` und `||` verketten und mit Pipes verbinden, z. B. `ssh host 'cd /srv && git log | head'`.
|
||||
|
||||
### Befehlslisten und Exit-Status
|
||||
|
||||
Mehrere Befehle in einer Zeile werden wie in `sh` verknüpft:
|
||||
|
||||
| Liste | Bedeutung |
|
||||
|------------|---------------------------------------------------|
|
||||
| `a ; b` | erst `a`, dann `b` |
|
||||
| `a && b` | `b` nur, wenn `a` erfolgreich war (Exit-Status 0) |
|
||||
| `a \|\| b` | `b` nur, wenn `a` fehlgeschlagen ist |
|
||||
|
||||
`&&` und `||` werden von links nach rechts ausgewertet, `a && b || c` führt also `c` aus, wenn `a` oder `b` fehlschlägt. Variablen werden erst beim Ausführen des jeweiligen Befehls expandiert, `cd /tmp && echo $PWD` gibt also schon das neue Verzeichnis aus.
|
||||
|
||||
`$?` (bzw. `${?}`) enthält den Exit-Status des letzten Befehls, `exit` ohne Argument beendet gosh mit diesem Status:
|
||||
|
||||
```
|
||||
$ false; echo $?
|
||||
1
|
||||
$ gibtsnicht || echo "Status $?"
|
||||
gosh: gibtsnicht: command not found
|
||||
Status 127
|
||||
```
|
||||
|
||||
Schlägt ein Programm fehl, gibt gosh selbst keine Meldung mehr aus (das Programm meldet den Fehler selbst), nur bei Fehlern von gosh, z. B. wenn ein Befehl nicht gefunden wird.
|
||||
|
||||
### Wildcards
|
||||
|
||||
Wörter mit `*`, `?` oder `[...]` werden durch die passenden Dateinamen ersetzt, sortiert:
|
||||
|
||||
| Muster | passt auf |
|
||||
|-----------|-----------------------------------------------------|
|
||||
| `*` | beliebig viele Zeichen (auch keine) |
|
||||
| `?` | genau ein Zeichen |
|
||||
| `[abc]` | eines der Zeichen `a`, `b`, `c` |
|
||||
| `[a-z]` | ein Zeichen aus dem Bereich |
|
||||
| `[!abc]` | ein Zeichen außer `a`, `b`, `c` (auch `[^abc]`) |
|
||||
|
||||
```
|
||||
$ ls *.go
|
||||
main.go main_test.go
|
||||
$ cat logs/2026-*/error.log
|
||||
$ ls -d */ # nur Verzeichnisse
|
||||
```
|
||||
|
||||
- Muster gelten pro Pfadteil, `*` passt nie auf `/`: `*/*.go` findet `.go`-Dateien eine Ebene tiefer.
|
||||
- Versteckte Dateien (mit `.` am Anfang) werden nur gefunden, wenn das Muster selbst mit `.` beginnt: `*` findet `.bashrc` nicht, `.*rc` schon.
|
||||
- Passt keine Datei, bleibt das Wort unverändert stehen (wie in `sh`), `ls *.xyz` meldet dann also `ls` den Fehler.
|
||||
- In Anführungszeichen oder mit `\` davor sind die Zeichen normale Zeichen: `echo "*"`, `echo '*.go'`, `echo \*`.
|
||||
- Werte von Variablen werden nicht als Muster behandelt (anders als in `sh`): Nach `set P=*.go` gibt `echo $P` wörtlich `*.go` aus. So kann ein Variablenwert nie unbemerkt auf viele Dateien passen. `echo $DIR/*.go` funktioniert dagegen, weil das `*` direkt in der Zeile steht.
|
||||
- Bei einer Umleitung muss das Muster genau eine Datei treffen (`> *.log`), sonst meldet gosh `ambiguous redirect`.
|
||||
|
||||
### Pipes und Umleitungen
|
||||
|
||||
```
|
||||
$ ls | sort -r | head -3
|
||||
$ make > build.log 2>&1
|
||||
$ grep -c error < build.log
|
||||
```
|
||||
|
||||
| Syntax | Bedeutung |
|
||||
|-----------------|------------------------------------------------------------|
|
||||
| `a \| b` | stdout von `a` wird stdin von `b` |
|
||||
| `< datei` | stdin aus `datei` lesen |
|
||||
| `> datei` | stdout in `datei` schreiben (wird überschrieben) |
|
||||
| `>> datei` | stdout an `datei` anhängen |
|
||||
| `2> datei` | stderr in `datei` schreiben (`2>>` hängt an) |
|
||||
| `2>&1` | stderr dorthin, wohin stdout gerade geht |
|
||||
| `>&2` | stdout dorthin, wohin stderr gerade geht |
|
||||
| `&> datei` | stdout und stderr in `datei` (`&>>` hängt an) |
|
||||
| `> datei` | ohne Befehl: legt `datei` an bzw. leert sie |
|
||||
|
||||
- Umleitungen werden von links nach rechts ausgewertet: `befehl > log 2>&1` schreibt beides in `log`, `befehl 2>&1 > log` schickt stderr dorthin, wo stdout vorher hinging (z. B. in eine Pipe).
|
||||
- Unterstützt werden die Dateideskriptoren 0, 1 und 2. Vor `>` und `<` zählt nur eine Zahl ohne Anführungszeichen als Deskriptor (`2>f`, aber nicht `x2>f` oder `"2">f`).
|
||||
- Operatoren in Anführungszeichen oder mit `\` davor sind normale Zeichen: `echo "a|b" 'c>d' e\>f`.
|
||||
- Der Exit-Status einer Pipeline ist der des letzten Befehls. Beendet sich ein Befehl am Ende (z. B. `head`), bekommt der schreibende Befehl davor `SIGPIPE`, `yes | head -1` endet also sofort.
|
||||
- Die Built-ins `pwd` und `help` lassen sich umleiten und in Pipes verwenden (`help | less`). `cd`, `set`, `export`, `exit` und `quit` verändern die Shell selbst und sind in einer Pipeline nicht erlaubt.
|
||||
- Ein einzelnes `&` (Hintergrundprozesse) gibt es noch nicht, es wird als normales Zeichen übergeben.
|
||||
|
||||
### Farben
|
||||
|
||||
Der Prompt wird über die Umgebungsvariable `GOSH_COLORS` eingefärbt. Sie besteht aus durch `:` getrennten Einträgen `schlüssel=code`:
|
||||
@@ -102,6 +210,15 @@ _gosh is not meant for production use, it is just a proof of concept._
|
||||
go build ./
|
||||
```
|
||||
|
||||
Die Version lässt sich mit `gosh -version` (oder `--version`, `-V`) abfragen und steht auch in der Ausgabe von `help`:
|
||||
|
||||
```
|
||||
$ gosh -version
|
||||
gosh 0.2.1 (branch: main, commit: 03e791c)
|
||||
```
|
||||
|
||||
Version und Branch werden beim Bauen mit GoReleaser per `-ldflags` gesetzt. Bei einem einfachen `go build` steht dort `dev`, der Commit wird dann aus den von Go eingebetteten Git-Informationen gelesen (mit `-dirty`, falls es uncommittete Änderungen gab).
|
||||
|
||||
## Release
|
||||
|
||||
Binaries sowie `.deb`- und `.rpm`-Pakete werden mit [GoReleaser](https://goreleaser.com) gebaut (Konfiguration: `.goreleaser.yaml`).
|
||||
|
||||
+480
-2
@@ -2,6 +2,7 @@ package main
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"errors"
|
||||
"io"
|
||||
"os"
|
||||
"os/exec"
|
||||
@@ -648,6 +649,21 @@ func TestExecInput_ExportNoArgs(t *testing.T) {
|
||||
}
|
||||
}
|
||||
|
||||
func TestVersionInfo(t *testing.T) {
|
||||
origVersion, origCommit, origBranch := version, commit, branch
|
||||
defer func() { version, commit, branch = origVersion, origCommit, origBranch }()
|
||||
|
||||
version, commit, branch = "1.2.3", "abc1234", "main"
|
||||
if got := versionInfo(); got != "1.2.3 (branch: main, commit: abc1234)" {
|
||||
t.Errorf("versionInfo() = %q", got)
|
||||
}
|
||||
|
||||
branch = ""
|
||||
if got := versionInfo(); got != "1.2.3 (commit: abc1234)" {
|
||||
t.Errorf("versionInfo() without branch = %q", got)
|
||||
}
|
||||
}
|
||||
|
||||
func TestExecInput_Help(t *testing.T) {
|
||||
// Just verify help doesn't return an error
|
||||
// We can't easily capture stdout in a unit test without a pipe
|
||||
@@ -843,6 +859,15 @@ func TestShellCompleter_Do(t *testing.T) {
|
||||
{"ls " + tmpDir + "/ma", []string{"in.go"}, 2},
|
||||
{"ls xyz", nil, 3},
|
||||
{"ls ~", []string{"/"}, 1},
|
||||
// Commands are completed after |, ;, && and ||, files after redirections
|
||||
{"ls | gi", []string{"tty "}, 2},
|
||||
{"ls|gi", []string{"tty "}, 2},
|
||||
{"true; gi", []string{"tty "}, 2},
|
||||
{"true && gi", []string{"tty "}, 2},
|
||||
{"false || gi", []string{"tty "}, 2},
|
||||
{"ls > ma", []string{"in.go"}, 2},
|
||||
{"ls 2>ma", []string{"in.go"}, 2},
|
||||
{"cat <ma", []string{"in.go"}, 2},
|
||||
}
|
||||
for _, tt := range tests {
|
||||
got, length := completeLine(tt.line)
|
||||
@@ -1158,7 +1183,7 @@ func TestShell_History(t *testing.T) {
|
||||
histFile := filepath.Join(t.TempDir(), "gosh", "history")
|
||||
workDir := t.TempDir()
|
||||
|
||||
cmd := exec.Command(bin)
|
||||
cmd := exec.Command(bin, "-i")
|
||||
cmd.Dir = workDir
|
||||
cmd.Env = append(os.Environ(), "GOSH_HISTFILE="+histFile)
|
||||
cmd.Stdin = strings.NewReader("echo first\n set SECRET=hunter2\nexit\n")
|
||||
@@ -1190,7 +1215,7 @@ func TestShell_History(t *testing.T) {
|
||||
func TestShell_SIGINTKillsOnlyChild(t *testing.T) {
|
||||
bin := buildShell(t)
|
||||
|
||||
cmd := exec.Command(bin)
|
||||
cmd := exec.Command(bin, "-i")
|
||||
// Own process group, so that we can signal it like the terminal does
|
||||
cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
|
||||
stdin, err := cmd.StdinPipe()
|
||||
@@ -1252,3 +1277,456 @@ func TestExecInput_PassesStdin(t *testing.T) {
|
||||
t.Errorf("command read %q from stdin, want %q", got, "hello")
|
||||
}
|
||||
}
|
||||
|
||||
func TestExitStatus(t *testing.T) {
|
||||
tests := []struct {
|
||||
input string
|
||||
want int
|
||||
}{
|
||||
{"true", 0},
|
||||
{"false", 1},
|
||||
{`sh -c "exit 42"`, 42},
|
||||
{`sh -c "kill -TERM \$\$"`, 128 + 15},
|
||||
{"gosh-no-such-command", 127},
|
||||
{"cd /gosh-no-such-dir", 127},
|
||||
}
|
||||
for _, tc := range tests {
|
||||
if got := exitStatus(execInput(tc.input)); got != tc.want {
|
||||
t.Errorf("exitStatus(execInput(%q)) = %d, want %d", tc.input, got, tc.want)
|
||||
}
|
||||
}
|
||||
if got := exitStatus(errors.New("other")); got != 1 {
|
||||
t.Errorf("exitStatus(other error) = %d, want 1", got)
|
||||
}
|
||||
}
|
||||
|
||||
func TestRunScript(t *testing.T) {
|
||||
origDir, _ := os.Getwd()
|
||||
defer os.Chdir(origDir)
|
||||
|
||||
dir := t.TempDir()
|
||||
script := "#!/usr/bin/gosh\n" +
|
||||
"# comment\n" +
|
||||
"\n" +
|
||||
"cd " + dir + "\n" +
|
||||
" # indented comment\n" +
|
||||
"touch first\n" +
|
||||
"false\n" +
|
||||
"touch second" // no trailing newline
|
||||
if got := runScript(strings.NewReader(script)); got != 0 {
|
||||
t.Errorf("runScript() = %d, want 0", got)
|
||||
}
|
||||
for _, name := range []string{"first", "second"} {
|
||||
if _, err := os.Stat(filepath.Join(dir, name)); err != nil {
|
||||
t.Errorf("expected %s to be created: %v", name, err)
|
||||
}
|
||||
}
|
||||
|
||||
// The status of the last command is returned
|
||||
if got := runScript(strings.NewReader("true\nsh -c 'exit 3'\n")); got != 3 {
|
||||
t.Errorf("runScript() = %d, want 3", got)
|
||||
}
|
||||
}
|
||||
|
||||
func TestRun_Options(t *testing.T) {
|
||||
tests := []struct {
|
||||
args []string
|
||||
want int
|
||||
}{
|
||||
{[]string{"-c", "true"}, 0},
|
||||
{[]string{"-c", "false"}, 1},
|
||||
{[]string{"-l", "-c", "sh -c 'exit 5'"}, 5},
|
||||
{[]string{"-c"}, 2},
|
||||
{[]string{"-x"}, 2},
|
||||
{[]string{"/gosh/no/such/script"}, 127},
|
||||
}
|
||||
for _, tc := range tests {
|
||||
if got := run(tc.args); got != tc.want {
|
||||
t.Errorf("run(%q) = %d, want %d", tc.args, got, tc.want)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestReadLine_DoesNotReadAhead(t *testing.T) {
|
||||
r := strings.NewReader("first\nsecond\n")
|
||||
line, err := readLine(r)
|
||||
if line != "first" || err != nil {
|
||||
t.Fatalf("readLine() = %q, %v", line, err)
|
||||
}
|
||||
if r.Len() != len("second\n") {
|
||||
t.Errorf("readLine() consumed more than one line, %d bytes left", r.Len())
|
||||
}
|
||||
}
|
||||
|
||||
func TestSplitList(t *testing.T) {
|
||||
tests := []struct {
|
||||
input string
|
||||
want []listItem
|
||||
}{
|
||||
{"", nil},
|
||||
{" ", nil},
|
||||
{"# only a comment", nil},
|
||||
{"ls", []listItem{{"", "ls"}}},
|
||||
{"a; b", []listItem{{"", "a"}, {";", " b"}}},
|
||||
{"a;", []listItem{{"", "a"}}},
|
||||
{"a && b || c", []listItem{{"", "a "}, {"&&", " b "}, {"||", " c"}}},
|
||||
{`echo "a;b" 'c&&d' e\;f`, []listItem{{"", `echo "a;b" 'c&&d' e\;f`}}},
|
||||
{`echo "x\"; y"`, []listItem{{"", `echo "x\"; y"`}}},
|
||||
{"echo ${X:-a;b}; c", []listItem{{"", "echo ${X:-a;b}"}, {";", " c"}}},
|
||||
{"echo a # b; c", []listItem{{"", "echo a "}}},
|
||||
{"echo a#b; c", []listItem{{"", "echo a#b"}, {";", " c"}}},
|
||||
{"echo a|b", []listItem{{"", "echo a|b"}}},
|
||||
}
|
||||
for _, tc := range tests {
|
||||
got, err := splitList(tc.input)
|
||||
if err != nil {
|
||||
t.Errorf("splitList(%q) returned error: %v", tc.input, err)
|
||||
continue
|
||||
}
|
||||
if !reflect.DeepEqual(got, tc.want) {
|
||||
t.Errorf("splitList(%q) = %q, want %q", tc.input, got, tc.want)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestSplitList_SyntaxErrors(t *testing.T) {
|
||||
for _, input := range []string{"; a", "a ;; b", "&& a", "a &&", "a ||", "a && ; b", "a || && b"} {
|
||||
if _, err := splitList(input); err == nil || !strings.Contains(err.Error(), "syntax error") {
|
||||
t.Errorf("splitList(%q) = %v, want syntax error", input, err)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestExecInput_Lists(t *testing.T) {
|
||||
dir := t.TempDir()
|
||||
t.Setenv("D", dir)
|
||||
tests := []struct {
|
||||
input string
|
||||
created []string
|
||||
missing []string
|
||||
status int
|
||||
}{
|
||||
{"touch $D/a; touch $D/b", []string{"a", "b"}, nil, 0},
|
||||
{"false; touch $D/c", []string{"c"}, nil, 0},
|
||||
{"true && touch $D/d", []string{"d"}, nil, 0},
|
||||
{"false && touch $D/e", nil, []string{"e"}, 1},
|
||||
{"false || touch $D/f", []string{"f"}, nil, 0},
|
||||
{"true || touch $D/g", nil, []string{"g"}, 0},
|
||||
{"false && touch $D/h || touch $D/i", []string{"i"}, []string{"h"}, 0},
|
||||
{"true && false || touch $D/j", []string{"j"}, nil, 0},
|
||||
{"gosh-no-such-command || touch $D/k", []string{"k"}, nil, 0},
|
||||
{"true && sh -c 'exit 4'", nil, nil, 4},
|
||||
}
|
||||
for _, tc := range tests {
|
||||
execInput(tc.input)
|
||||
if lastStatus != tc.status {
|
||||
t.Errorf("%q: $? = %d, want %d", tc.input, lastStatus, tc.status)
|
||||
}
|
||||
for _, name := range tc.created {
|
||||
if _, err := os.Stat(filepath.Join(dir, name)); err != nil {
|
||||
t.Errorf("%q: expected %s to be created", tc.input, name)
|
||||
}
|
||||
}
|
||||
for _, name := range tc.missing {
|
||||
if _, err := os.Stat(filepath.Join(dir, name)); err == nil {
|
||||
t.Errorf("%q: %s must not be created", tc.input, name)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestExecInput_ExpandsPerCommand(t *testing.T) {
|
||||
origDir, _ := os.Getwd()
|
||||
defer os.Chdir(origDir)
|
||||
dir := t.TempDir()
|
||||
out := filepath.Join(dir, "out")
|
||||
t.Setenv("GOSH_TEST_OUT", out)
|
||||
os.Unsetenv("GOSH_TEST_LIST")
|
||||
defer os.Unsetenv("GOSH_TEST_LIST")
|
||||
|
||||
// The variable is set by the first command and used by the second one
|
||||
err := execInput(`set GOSH_TEST_LIST=hello && sh -c 'printf %s "$GOSH_TEST_LIST" > "$GOSH_TEST_OUT"'`)
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
if got, _ := os.ReadFile(out); string(got) != "hello" {
|
||||
t.Errorf("got %q, want %q", got, "hello")
|
||||
}
|
||||
}
|
||||
|
||||
func TestExpandVar_LastStatus(t *testing.T) {
|
||||
execInput("sh -c 'exit 3'")
|
||||
for _, input := range []string{"$?", "${?}"} {
|
||||
words, err := splitWords("echo " + input)
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
if words[1] != "3" {
|
||||
t.Errorf("%s = %q, want %q", input, words[1], "3")
|
||||
}
|
||||
}
|
||||
execInput("true")
|
||||
if words, _ := splitWords("echo $?"); words[1] != "0" {
|
||||
t.Errorf("$? = %q after true, want 0", words[1])
|
||||
}
|
||||
}
|
||||
|
||||
func TestExecInput_CommandNotFound(t *testing.T) {
|
||||
err := execInput("gosh-no-such-command")
|
||||
if err == nil || err.Error() != "gosh-no-such-command: command not found" {
|
||||
t.Errorf("got %v, want command not found", err)
|
||||
}
|
||||
if lastStatus != 127 {
|
||||
t.Errorf("$? = %d, want 127", lastStatus)
|
||||
}
|
||||
}
|
||||
|
||||
func TestTokenize_Operators(t *testing.T) {
|
||||
tests := []struct {
|
||||
input string
|
||||
want []token
|
||||
}{
|
||||
{"a | b", []token{{word: "a"}, {op: "|"}, {word: "b"}}},
|
||||
{"a|b", []token{{word: "a"}, {op: "|"}, {word: "b"}}},
|
||||
{"a > f", []token{{word: "a"}, {op: ">", fd: 1}, {word: "f"}}},
|
||||
{"a >>f", []token{{word: "a"}, {op: ">>", fd: 1}, {word: "f"}}},
|
||||
{"a < f", []token{{word: "a"}, {op: "<", fd: 0}, {word: "f"}}},
|
||||
{"a 2>f", []token{{word: "a"}, {op: ">", fd: 2}, {word: "f"}}},
|
||||
{"a 2>>f", []token{{word: "a"}, {op: ">>", fd: 2}, {word: "f"}}},
|
||||
{"a 2>&1", []token{{word: "a"}, {op: ">&", fd: 2, dup: 1}}},
|
||||
{"a >&2", []token{{word: "a"}, {op: ">&", fd: 1, dup: 2}}},
|
||||
{"a 0<&2", []token{{word: "a"}, {op: "<&", fd: 0, dup: 2}}},
|
||||
{"a &>f", []token{{word: "a"}, {op: "&>", fd: 1}, {word: "f"}}},
|
||||
{"a &>>f", []token{{word: "a"}, {op: "&>>", fd: 1}, {word: "f"}}},
|
||||
// Only a word of unquoted digits is a file descriptor
|
||||
{"a x2>f", []token{{word: "a"}, {word: "x2"}, {op: ">", fd: 1}, {word: "f"}}},
|
||||
{`a "2">f`, []token{{word: "a"}, {word: "2"}, {op: ">", fd: 1}, {word: "f"}}},
|
||||
{"a 2 >f", []token{{word: "a"}, {word: "2"}, {op: ">", fd: 1}, {word: "f"}}},
|
||||
// Quoted and escaped operators are words
|
||||
{`echo "a|b" 'c>d' e\<f`, []token{{word: "echo"}, {word: "a|b"}, {word: "c>d"}, {word: "e<f"}}},
|
||||
// A lone & is a word
|
||||
{"a & b", []token{{word: "a"}, {word: "&"}, {word: "b"}}},
|
||||
{"cat ~|x", []token{{word: "cat"}, {word: getHomeDir()}, {op: "|"}, {word: "x"}}},
|
||||
}
|
||||
for _, tc := range tests {
|
||||
got, err := tokenize(tc.input)
|
||||
if err != nil {
|
||||
t.Errorf("tokenize(%q) returned error: %v", tc.input, err)
|
||||
continue
|
||||
}
|
||||
// Patterns are tested in TestTokenize_Patterns
|
||||
for i := range got {
|
||||
got[i].pattern, got[i].glob = "", false
|
||||
}
|
||||
if !reflect.DeepEqual(got, tc.want) {
|
||||
t.Errorf("tokenize(%q) = %+v, want %+v", tc.input, got, tc.want)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestExecInput_SyntaxErrors(t *testing.T) {
|
||||
for _, input := range []string{"echo a |", "| echo a", "echo a | | b", "echo a >", "echo a > | b", "echo a >&", "echo a 2>&x", "; a"} {
|
||||
err := execInput(input)
|
||||
if err == nil || !strings.Contains(err.Error(), "syntax error") {
|
||||
t.Errorf("execInput(%q) = %v, want syntax error", input, err)
|
||||
}
|
||||
if lastStatus != 2 {
|
||||
t.Errorf("execInput(%q): $? = %d, want 2", input, lastStatus)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestExecInput_PipesAndRedirections(t *testing.T) {
|
||||
origDir, _ := os.Getwd()
|
||||
defer os.Chdir(origDir)
|
||||
dir := t.TempDir()
|
||||
os.Chdir(dir)
|
||||
|
||||
read := func(name string) string {
|
||||
data, err := os.ReadFile(filepath.Join(dir, name))
|
||||
if err != nil {
|
||||
t.Errorf("reading %s: %v", name, err)
|
||||
}
|
||||
return string(data)
|
||||
}
|
||||
|
||||
tests := []struct {
|
||||
input string
|
||||
file string
|
||||
want string
|
||||
status int
|
||||
}{
|
||||
{`printf 'b\na\nc\n' | sort | head -n 2 > out`, "out", "a\nb\n", 0},
|
||||
{"echo one > f1; echo two >> f1", "f1", "one\ntwo\n", 0},
|
||||
{"echo one > f2; echo two > f2", "f2", "two\n", 0},
|
||||
{"tr a-z A-Z < f1 > f3", "f3", "ONE\nTWO\n", 0},
|
||||
{"sh -c 'echo out; echo err >&2' > f4 2>&1", "f4", "out\nerr\n", 0},
|
||||
{"sh -c 'echo out; echo err >&2' &> f5", "f5", "out\nerr\n", 0},
|
||||
{"sh -c 'echo err >&2' 2> f6", "f6", "err\n", 0},
|
||||
// 2>&1 before >file sends stderr to the old stdout (the pipe)
|
||||
{"sh -c 'echo out; echo err >&2' 2>&1 > /dev/null | cat > f7", "f7", "err\n", 0},
|
||||
{"sh -c 'echo err >&2' 2>&1 | tr a-z A-Z > f8", "f8", "ERR\n", 0},
|
||||
// Builtins write to redirections and pipes
|
||||
{"pwd > f9", "f9", dir + "\n", 0},
|
||||
{"pwd | cat > f10", "f10", dir + "\n", 0},
|
||||
{"help | head -n 1 > f11", "f11", "gosh - Go Shell\n", 0},
|
||||
// Errors of builtins go to the redirected stderr
|
||||
{"cd /gosh/no/such/dir 2> f12", "f12", "gosh: chdir /gosh/no/such/dir: no such file or directory\n", 1},
|
||||
// The status of a pipeline is the one of the last command
|
||||
{"false | true > f13", "f13", "", 0},
|
||||
{"true | false > f14", "f14", "", 1},
|
||||
// A redirection without a command creates the file
|
||||
{"> f15", "f15", "", 0},
|
||||
// SIGPIPE ends the writer when the reader exits
|
||||
{"yes | head -n 1 > f16", "f16", "y\n", 0},
|
||||
// A command that is not found does not stop the pipeline
|
||||
{"gosh-no-such-command | echo after > f17", "f17", "after\n", 0},
|
||||
{"echo before | gosh-no-such-command 2> f18", "f18", "", 127},
|
||||
}
|
||||
for _, tc := range tests {
|
||||
execInput(tc.input)
|
||||
if lastStatus != tc.status {
|
||||
t.Errorf("%q: $? = %d, want %d", tc.input, lastStatus, tc.status)
|
||||
}
|
||||
if got := read(tc.file); got != tc.want {
|
||||
t.Errorf("%q: %s = %q, want %q", tc.input, tc.file, got, tc.want)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestExecInput_RedirectionErrors(t *testing.T) {
|
||||
origDir, _ := os.Getwd()
|
||||
defer os.Chdir(origDir)
|
||||
os.Chdir(t.TempDir())
|
||||
|
||||
tests := []struct {
|
||||
input string
|
||||
wantErr string
|
||||
}{
|
||||
{"cat < gosh-no-such-file", "gosh-no-such-file: no such file or directory"},
|
||||
{"echo a > gosh-no-such-dir/f", "gosh-no-such-dir/f: no such file or directory"},
|
||||
{"echo a 3> f", "3: bad file descriptor"},
|
||||
{"echo a 2>&5", "5: bad file descriptor"},
|
||||
{"echo a | cd /", "cd: cannot be used in a pipeline"},
|
||||
{"echo a | exit 3", "exit: cannot be used in a pipeline"},
|
||||
}
|
||||
for _, tc := range tests {
|
||||
err := execInput(tc.input)
|
||||
if err == nil || err.Error() != tc.wantErr {
|
||||
t.Errorf("execInput(%q) = %v, want %q", tc.input, err, tc.wantErr)
|
||||
}
|
||||
if lastStatus != 1 {
|
||||
t.Errorf("execInput(%q): $? = %d, want 1", tc.input, lastStatus)
|
||||
}
|
||||
}
|
||||
// The command is not run if a redirection fails
|
||||
if _, err := os.Stat("f"); err == nil {
|
||||
t.Error("file f must not be created for a bad file descriptor")
|
||||
}
|
||||
}
|
||||
|
||||
func TestTokenize_Patterns(t *testing.T) {
|
||||
t.Setenv("GOSH_GLOB", "*.go")
|
||||
tests := []struct {
|
||||
input string
|
||||
pattern string
|
||||
glob bool
|
||||
}{
|
||||
{"*.go", "*.go", true},
|
||||
{"a?c", "a?c", true},
|
||||
{"[ab].go", "[ab].go", true},
|
||||
{"[!a].go", "[^a].go", true},
|
||||
{"plain", "plain", false},
|
||||
// Quoted, escaped and expanded characters are literal
|
||||
{`"*.go"`, `\*.go`, false},
|
||||
{`'*'.go`, `\*.go`, false},
|
||||
{`\*.go`, `\*.go`, false},
|
||||
{`"x"*`, `x*`, true},
|
||||
{"$GOSH_GLOB", `\*.go`, false},
|
||||
{`'['!a].go`, `\[!a].go`, false},
|
||||
}
|
||||
for _, tc := range tests {
|
||||
tokens, err := tokenize(tc.input)
|
||||
if err != nil || len(tokens) != 1 {
|
||||
t.Errorf("tokenize(%q) = %+v, %v", tc.input, tokens, err)
|
||||
continue
|
||||
}
|
||||
if tokens[0].pattern != tc.pattern || tokens[0].glob != tc.glob {
|
||||
t.Errorf("tokenize(%q): pattern %q, glob %v; want %q, %v",
|
||||
tc.input, tokens[0].pattern, tokens[0].glob, tc.pattern, tc.glob)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestExpandGlob(t *testing.T) {
|
||||
origDir, _ := os.Getwd()
|
||||
defer os.Chdir(origDir)
|
||||
dir := t.TempDir()
|
||||
os.Chdir(dir)
|
||||
for _, d := range []string{"sub/deep", "other"} {
|
||||
os.MkdirAll(d, 0755)
|
||||
}
|
||||
for _, f := range []string{"a.go", "b.go", "c.txt", ".hidden.go", "with space.go", "[x].go", "sub/s1.go", "sub/deep/d.go", "other/o.go"} {
|
||||
os.WriteFile(f, nil, 0644)
|
||||
}
|
||||
|
||||
tests := []struct {
|
||||
pattern string
|
||||
want []string
|
||||
}{
|
||||
{"*.go", []string{"[x].go", "a.go", "b.go", "with space.go"}},
|
||||
{".*.go", []string{".hidden.go"}},
|
||||
{"?.go", []string{"a.go", "b.go"}},
|
||||
{"[ab].go", []string{"a.go", "b.go"}},
|
||||
{"[^a].go", []string{"b.go"}},
|
||||
{"*/*.go", []string{"other/o.go", "sub/s1.go"}},
|
||||
{"*/", []string{"other/", "sub/"}},
|
||||
{"sub/*/*.go", []string{"sub/deep/d.go"}},
|
||||
{"./c*", []string{"./c.txt"}},
|
||||
{dir + "/c*", []string{dir + "/c.txt"}},
|
||||
{`\[x\].go`, []string{"[x].go"}},
|
||||
{"*.xyz", nil},
|
||||
{"[", nil},
|
||||
}
|
||||
for _, tc := range tests {
|
||||
if got := expandGlob(tc.pattern); !reflect.DeepEqual(got, tc.want) {
|
||||
t.Errorf("expandGlob(%q) = %q, want %q", tc.pattern, got, tc.want)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestExecInput_Wildcards(t *testing.T) {
|
||||
origDir, _ := os.Getwd()
|
||||
defer os.Chdir(origDir)
|
||||
dir := t.TempDir()
|
||||
os.Chdir(dir)
|
||||
for _, f := range []string{"a.go", "b.go", "c.txt"} {
|
||||
os.WriteFile(f, []byte(f+"\n"), 0644)
|
||||
}
|
||||
|
||||
tests := []struct {
|
||||
input string
|
||||
want string
|
||||
}{
|
||||
{"echo *.go > out", "a.go b.go\n"},
|
||||
{"cat *.go > out", "a.go\nb.go\n"},
|
||||
// No match: the word is passed on unchanged, like in sh
|
||||
{"echo *.xyz > out", "*.xyz\n"},
|
||||
{`echo "*.go" '?.go' \*.go > out`, "*.go ?.go *.go\n"},
|
||||
// A redirection to a pattern with a single match uses that file
|
||||
{"echo hi > *.txt; cat c.txt > out", "hi\n"},
|
||||
}
|
||||
for _, tc := range tests {
|
||||
if err := execInput(tc.input); err != nil {
|
||||
t.Errorf("execInput(%q) returned error: %v", tc.input, err)
|
||||
}
|
||||
if got, _ := os.ReadFile("out"); string(got) != tc.want {
|
||||
t.Errorf("%q: got %q, want %q", tc.input, got, tc.want)
|
||||
}
|
||||
}
|
||||
|
||||
err := execInput("echo hi > *.go")
|
||||
if err == nil || err.Error() != "*.go: ambiguous redirect" {
|
||||
t.Errorf("expected ambiguous redirect error, got %v", err)
|
||||
}
|
||||
}
|
||||
Reference in new issue
Block a user