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Add short version flag -v when not otherwise set (#996)

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Signed-off-by: Dave Henderson <dhenderson@gmail.com>
This commit is contained in:
Dave Henderson 2020-02-28 13:13:40 -05:00 committed by GitHub
parent 39cf99f556
commit 95f2f73ed9
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 122 additions and 2 deletions
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9
command.go
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@ -84,7 +84,8 @@ type Command struct {
// Version defines the version for this command. If this value is non-empty and the command does not
// define a "version" flag, a "version" boolean flag will be added to the command and, if specified,
// will print content of the "Version" variable.
// will print content of the "Version" variable. A shorthand "v" flag will also be added if the
// command does not define one.
Version string
// The *Run functions are executed in the following order:
@ -1033,7 +1034,11 @@ func (c *Command) InitDefaultVersionFlag() {
} else {
usage += c.Name()
}
c.Flags().Bool("version", false, usage)
if c.Flags().ShorthandLookup("v") == nil {
c.Flags().BoolP("version", "v", false, usage)
} else {
c.Flags().Bool("version", false, usage)
}
}
}

115
command_test.go
View file

@ -921,6 +921,52 @@ func TestVersionFlagExecuted(t *testing.T) {
checkStringContains(t, output, "root version 1.0.0")
}
func TestVersionFlagExecutedWithNoName(t *testing.T) {
rootCmd := &Command{Version: "1.0.0", Run: emptyRun}
output, err := executeCommand(rootCmd, "--version", "arg1")
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
checkStringContains(t, output, "version 1.0.0")
}
func TestShortAndLongVersionFlagInHelp(t *testing.T) {
rootCmd := &Command{Use: "root", Version: "1.0.0", Run: emptyRun}
output, err := executeCommand(rootCmd, "--help")
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
checkStringContains(t, output, "-v, --version")
}
func TestLongVersionFlagOnlyInHelpWhenShortPredefined(t *testing.T) {
rootCmd := &Command{Use: "root", Version: "1.0.0", Run: emptyRun}
rootCmd.Flags().StringP("foo", "v", "", "not a version flag")
output, err := executeCommand(rootCmd, "--help")
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
checkStringOmits(t, output, "-v, --version")
checkStringContains(t, output, "--version")
}
func TestShorthandVersionFlagExecuted(t *testing.T) {
rootCmd := &Command{Use: "root", Version: "1.0.0", Run: emptyRun}
output, err := executeCommand(rootCmd, "-v", "arg1")
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
checkStringContains(t, output, "root version 1.0.0")
}
func TestVersionTemplate(t *testing.T) {
rootCmd := &Command{Use: "root", Version: "1.0.0", Run: emptyRun}
rootCmd.SetVersionTemplate(`customized version: {{.Version}}`)
@ -933,6 +979,18 @@ func TestVersionTemplate(t *testing.T) {
checkStringContains(t, output, "customized version: 1.0.0")
}
func TestShorthandVersionTemplate(t *testing.T) {
rootCmd := &Command{Use: "root", Version: "1.0.0", Run: emptyRun}
rootCmd.SetVersionTemplate(`customized version: {{.Version}}`)
output, err := executeCommand(rootCmd, "-v", "arg1")
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
checkStringContains(t, output, "customized version: 1.0.0")
}
func TestVersionFlagExecutedOnSubcommand(t *testing.T) {
rootCmd := &Command{Use: "root", Version: "1.0.0"}
rootCmd.AddCommand(&Command{Use: "sub", Run: emptyRun})
@ -945,6 +1003,18 @@ func TestVersionFlagExecutedOnSubcommand(t *testing.T) {
checkStringContains(t, output, "root version 1.0.0")
}
func TestShorthandVersionFlagExecutedOnSubcommand(t *testing.T) {
rootCmd := &Command{Use: "root", Version: "1.0.0"}
rootCmd.AddCommand(&Command{Use: "sub", Run: emptyRun})
output, err := executeCommand(rootCmd, "-v", "sub")
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
checkStringContains(t, output, "root version 1.0.0")
}
func TestVersionFlagOnlyAddedToRoot(t *testing.T) {
rootCmd := &Command{Use: "root", Version: "1.0.0", Run: emptyRun}
rootCmd.AddCommand(&Command{Use: "sub", Run: emptyRun})
@ -957,6 +1027,18 @@ func TestVersionFlagOnlyAddedToRoot(t *testing.T) {
checkStringContains(t, err.Error(), "unknown flag: --version")
}
func TestShortVersionFlagOnlyAddedToRoot(t *testing.T) {
rootCmd := &Command{Use: "root", Version: "1.0.0", Run: emptyRun}
rootCmd.AddCommand(&Command{Use: "sub", Run: emptyRun})
_, err := executeCommand(rootCmd, "sub", "-v")
if err == nil {
t.Errorf("Expected error")
}
checkStringContains(t, err.Error(), "unknown shorthand flag: 'v' in -v")
}
func TestVersionFlagOnlyExistsIfVersionNonEmpty(t *testing.T) {
rootCmd := &Command{Use: "root", Run: emptyRun}
@ -967,6 +1049,39 @@ func TestVersionFlagOnlyExistsIfVersionNonEmpty(t *testing.T) {
checkStringContains(t, err.Error(), "unknown flag: --version")
}
func TestShorthandVersionFlagOnlyExistsIfVersionNonEmpty(t *testing.T) {
rootCmd := &Command{Use: "root", Run: emptyRun}
_, err := executeCommand(rootCmd, "-v")
if err == nil {
t.Errorf("Expected error")
}
checkStringContains(t, err.Error(), "unknown shorthand flag: 'v' in -v")
}
func TestShorthandVersionFlagOnlyAddedIfShorthandNotDefined(t *testing.T) {
rootCmd := &Command{Use: "root", Run: emptyRun, Version: "1.2.3"}
rootCmd.Flags().StringP("notversion", "v", "", "not a version flag")
_, err := executeCommand(rootCmd, "-v")
if err == nil {
t.Errorf("Expected error")
}
check(t, rootCmd.Flags().ShorthandLookup("v").Name, "notversion")
checkStringContains(t, err.Error(), "flag needs an argument: 'v' in -v")
}
func TestShorthandVersionFlagOnlyAddedIfVersionNotDefined(t *testing.T) {
rootCmd := &Command{Use: "root", Run: emptyRun, Version: "1.2.3"}
rootCmd.Flags().Bool("version", false, "a different kind of version flag")
_, err := executeCommand(rootCmd, "-v")
if err == nil {
t.Errorf("Expected error")
}
checkStringContains(t, err.Error(), "unknown shorthand flag: 'v' in -v")
}
func TestUsageIsNotPrintedTwice(t *testing.T) {
var cmd = &Command{Use: "root"}
var sub = &Command{Use: "sub"}