"io"
"io/ioutil"
"path/filepath"
+ "regexp"
+ "runtime"
"sort"
"strings"
)
return f(prog, args, stdin, stdout, stderr)
}
-// Multi is a Handler that looks up its first argument in a map, and
-// invokes the resulting Handler with the remaining args.
+// Version is a Handler that prints the package version (set at build
+// time using -ldflags) and Go runtime version to stdout, and returns
+// 0.
+var Version versionCommand
+
+var version = "dev"
+
+type versionCommand struct{}
+
+func (versionCommand) RunCommand(prog string, args []string, stdin io.Reader, stdout, stderr io.Writer) int {
+ prog = regexp.MustCompile(` -*version$`).ReplaceAllLiteralString(prog, "")
+ fmt.Fprintf(stdout, "%s %s (%s)\n", prog, version, runtime.Version())
+ return 0
+}
+
+// Multi is a Handler that looks up its first argument in a map (after
+// stripping any "arvados-" or "crunch-" prefix), and invokes the
+// resulting Handler with the remaining args.
//
// Example:
//
type Multi map[string]Handler
func (m Multi) RunCommand(prog string, args []string, stdin io.Reader, stdout, stderr io.Writer) int {
- if len(args) < 1 {
- fmt.Fprintf(stderr, "usage: %s command [args]\n", prog)
- m.Usage(stderr)
- return 2
- }
_, basename := filepath.Split(prog)
+ basename = strings.TrimPrefix(basename, "arvados-")
+ basename = strings.TrimPrefix(basename, "crunch-")
if cmd, ok := m[basename]; ok {
return cmd.RunCommand(prog, args, stdin, stdout, stderr)
+ } else if len(args) < 1 {
+ fmt.Fprintf(stderr, "usage: %s command [args]\n", prog)
+ m.Usage(stderr)
+ return 2
} else if cmd, ok = m[args[0]]; ok {
return cmd.RunCommand(prog+" "+args[0], args[1:], stdin, stdout, stderr)
} else {