18947: Refactor keep-web as arvados-server command.

[arvados.git] / lib / cmd / cmd.go

diff --git a/lib/cmd/cmd.go b/lib/cmd/cmd.go
index 24b69f0cc5c529fe45b5be6f4ae6698cff607ff9..a03cb90f68e6cd84ee0e9091971af7370f0ee7db 100644 (file)
--- a/lib/cmd/cmd.go
+++ b/lib/cmd/cmd.go
@@ -2,7 +2,7 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
-// package cmd helps define reusable functions that can be exposed as
+// Package cmd helps define reusable functions that can be exposed as
 // [subcommands of] command line programs.
 package cmd
 
@@ -16,6 +16,8 @@ import (
        "runtime"
        "sort"
        "strings"
+
+       "github.com/sirupsen/logrus"
 )
 
 type Handler interface {
@@ -37,6 +39,10 @@ var version = "dev"
 
 type versionCommand struct{}
 
+func (versionCommand) String() string {
+       return fmt.Sprintf("%s (%s)", version, runtime.Version())
+}
+
 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())
@@ -54,16 +60,28 @@ func (versionCommand) RunCommand(prog string, args []string, stdin io.Reader, st
 //                     fmt.Println(args[0])
 //                     return 2
 //             }),
-//     })("/usr/bin/multi", []string{"foobar", "baz"}))
+//     })("/usr/bin/multi", []string{"foobar", "baz"}, os.Stdin, os.Stdout, os.Stderr))
 //
 // ...prints "baz" and exits 2.
 type Multi map[string]Handler
 
 func (m Multi) RunCommand(prog string, args []string, stdin io.Reader, stdout, stderr io.Writer) int {
        _, basename := filepath.Split(prog)
-       basename = strings.TrimPrefix(basename, "arvados-")
-       basename = strings.TrimPrefix(basename, "crunch-")
-       if cmd, ok := m[basename]; ok {
+       if i := strings.Index(basename, "~"); i >= 0 {
+               // drop "~anything" suffix (arvados-dispatch-cloud's
+               // DeployRunnerBinary feature relies on this)
+               basename = basename[:i]
+       }
+       cmd, ok := m[basename]
+       if !ok {
+               // "controller" command exists, and binary is named "arvados-controller"
+               cmd, ok = m[strings.TrimPrefix(basename, "arvados-")]
+       }
+       if !ok {
+               // "dispatch-slurm" command exists, and binary is named "crunch-dispatch-slurm"
+               cmd, ok = m[strings.TrimPrefix(basename, "crunch-")]
+       }
+       if ok {
                return cmd.RunCommand(prog, args, stdin, stdout, stderr)
        } else if len(args) < 1 {
                fmt.Fprintf(stderr, "usage: %s command [args]\n", prog)
@@ -137,3 +155,9 @@ func SubcommandToFront(args []string, flagset FlagSet) []string {
        copy(newargs[flagargs+1:], args[flagargs+1:])
        return newargs
 }
+
+type NoPrefixFormatter struct{}
+
+func (NoPrefixFormatter) Format(entry *logrus.Entry) ([]byte, error) {
+       return []byte(entry.Message + "\n"), nil
+}