| // Copyright 2015 The Vanadium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package main |
| |
| import ( |
| "fmt" |
| "os" |
| "os/exec" |
| "path/filepath" |
| |
| "v.io/x/lib/cmdline" |
| ) |
| |
| var cmdWhich = &cmdline.Command{ |
| Runner: cmdline.RunnerFunc(runWhich), |
| Name: "which", |
| Short: "Show path to the jiri tool", |
| Long: ` |
| Which behaves similarly to the unix commandline tool. It is useful in |
| determining whether the jiri binary is being run directly, or run via the jiri |
| shim script. |
| |
| If the binary is being run directly, the output looks like this: |
| |
| # binary |
| /path/to/binary/jiri |
| |
| If the script is being run, the output looks like this: |
| |
| # script |
| /path/to/script/jiri |
| `, |
| } |
| |
| func runWhich(env *cmdline.Env, args []string) error { |
| if len(args) == 0 { |
| fmt.Fprintln(env.Stdout, "# binary") |
| path, err := exec.LookPath(os.Args[0]) |
| if err != nil { |
| return err |
| } |
| abs, err := filepath.Abs(path) |
| if err != nil { |
| return err |
| } |
| fmt.Fprintln(env.Stdout, abs) |
| return nil |
| } |
| // TODO(toddw): Look up the path to each argument. This will only be helpful |
| // after the profiles are moved back into the main jiri tool. |
| return fmt.Errorf("unexpected arguments") |
| } |