Ejemplo n.º 1
0
func (c *HelpToolCommand) Run(ctx *cmd.Context) error {
	var hookctx dummyHookContext
	if c.tool == "" {
		// Ripped from SuperCommand. We could Run() a SuperCommand
		// with "help commands", but then the implicit "help" command
		// shows up.
		names := jujuc.CommandNames()
		cmds := make([]cmd.Command, 0, len(names))
		longest := 0
		for _, name := range names {
			if c, err := jujuc.NewCommand(hookctx, name); err == nil {
				if len(name) > longest {
					longest = len(name)
				}
				cmds = append(cmds, c)
			}
		}
		for _, c := range cmds {
			info := c.Info()
			fmt.Fprintf(ctx.Stdout, "%-*s  %s\n", longest, info.Name, info.Purpose)
		}
	} else {
		c, err := jujuc.NewCommand(hookctx, c.tool)
		if err != nil {
			return err
		}
		info := c.Info()
		f := gnuflag.NewFlagSet(info.Name, gnuflag.ContinueOnError)
		c.SetFlags(f)
		ctx.Stdout.Write(info.Help(f))
	}
	return nil
}
Ejemplo n.º 2
0
func (s *ToolsSuite) TestEnsureJujucSymlinks(c *C) {
	jujudPath := filepath.Join(s.toolsDir, "jujud")
	err := ioutil.WriteFile(jujudPath, []byte("assume sane"), 0755)
	c.Assert(err, IsNil)

	assertLink := func(path string) time.Time {
		target, err := os.Readlink(path)
		c.Assert(err, IsNil)
		c.Assert(target, Equals, "./jujud")
		fi, err := os.Lstat(path)
		c.Assert(err, IsNil)
		return fi.ModTime()
	}

	// Check that EnsureJujucSymlinks writes appropriate symlinks.
	err = uniter.EnsureJujucSymlinks(s.toolsDir)
	c.Assert(err, IsNil)
	mtimes := map[string]time.Time{}
	for _, name := range jujuc.CommandNames() {
		tool := filepath.Join(s.toolsDir, name)
		mtimes[tool] = assertLink(tool)
	}

	// Check that EnsureJujucSymlinks doesn't overwrite things that don't need to be.
	err = uniter.EnsureJujucSymlinks(s.toolsDir)
	c.Assert(err, IsNil)
	for tool, mtime := range mtimes {
		c.Assert(assertLink(tool), Equals, mtime)
	}
}
Ejemplo n.º 3
0
// EnsureJujucSymlinks creates a symbolic link to jujuc within dir for each
// hook command. If the commands already exist, this operation does nothing.
func EnsureJujucSymlinks(dir string) (err error) {
	for _, name := range jujuc.CommandNames() {
		// The link operation fails when the target already exists,
		// so this is a no-op when the command names already
		// exist.
		err := os.Symlink("./jujuc", filepath.Join(dir, name))
		if err == nil {
			continue
		}
		// TODO(rog) drop LinkError check when fix is released (see http://codereview.appspot.com/6442080/)
		if e, ok := err.(*os.LinkError); !ok || !os.IsExist(e.Err) {
			return fmt.Errorf("cannot initialize hook commands in %q: %v", dir, err)
		}
	}
	return nil
}