homemaker/command.go

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/*
* Copyright (c) 2015 Alex Yatskov <alex@foosoft.net>
* Author: Alex Yatskov <alex@foosoft.net>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package main
import (
"fmt"
"log"
"os"
"os/exec"
"strings"
)
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type macro struct {
Prefix []string
Suffix []string
}
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func processCmd(params []string, dir string, conf *config, flags int) error {
args := appendExpEnv(nil, params)
if len(args) == 0 {
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return fmt.Errorf("invalid command statement")
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}
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cmdName := args[0]
if strings.HasPrefix(cmdName, "@") {
macroName := strings.TrimPrefix(cmdName, "@")
m, ok := conf.Macros[macroName]
if !ok {
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return fmt.Errorf("macro not found %s", macroName)
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}
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margs := appendExpEnv(nil, m.Prefix)
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if len(args) > 1 {
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margs = appendExpEnv(margs, args[1:])
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}
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margs = appendExpEnv(margs, m.Suffix)
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if flags&flagVerbose == flagVerbose {
log.Printf("using macro %s", macroName)
}
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return processCmd(margs, dir, conf, flags)
}
var cmdArgs []string
if len(args) > 1 {
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cmdArgs = args[1:]
}
cmd := exec.Command(cmdName, cmdArgs...)
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cmd.Dir = dir
cmd.Stderr = os.Stderr
cmd.Stdout = os.Stdout
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cmd.Stdin = os.Stdin
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if flags&flagVerbose == flagVerbose {
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log.Printf("executing command %s %s", cmdName, strings.Join(cmdArgs, " "))
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}
return cmd.Run()
}