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credentials: Serve(): implement "--version, -v", and "--help, -h" flags

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As recommended in the GNU documentation;

- https://www.gnu.org/prep/standards/standards.html#g_t_002d_002dversion
- https://www.gnu.org/prep/standards/standards.html#g_t_002d_002dhelp

With this patch:

    $ docker-credential-osxkeychain --version
    docker-credential-osxkeychain (github.com/docker/docker-credential-helpers) v0.7.0-51-g26c426e.m

    $ docker-credential-osxkeychain -v
    docker-credential-osxkeychain (github.com/docker/docker-credential-helpers) v0.7.0-51-g26c426e.m

    $ docker-credential-osxkeychain --help
    Usage: docker-credential-osxkeychain <store|get|erase|list|version>

    $ docker-credential-osxkeychain -h
    Usage: docker-credential-osxkeychain <store|get|erase|list|version>

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn
2023-05-28 13:41:23 +02:00
parent ae1d1ec013
commit 99079cafd2
1 changed files with 9 additions and 0 deletions
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credentials/credentials.go
+9
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@@ -54,6 +54,15 @@ func Serve(helper Helper) {
os.Exit(1)
}
switch os.Args[1] {
case "--version", "-v":
_ = PrintVersion(os.Stdout)
os.Exit(0)
case "--help", "-h":
_, _ = fmt.Fprintln(os.Stdout, usage())
os.Exit(0)
}
if err := HandleCommand(helper, os.Args[1], os.Stdin, os.Stdout); err != nil {
_, _ = fmt.Fprintln(os.Stdout, err)
os.Exit(1)