github.com/colincross/blueprint@v0.0.0-20150626231830-9c067caf2eb5/deptools/depfile.go (about)

     1  // Copyright 2014 Google Inc. All rights reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package deptools
    16  
    17  import (
    18  	"fmt"
    19  	"os"
    20  	"strings"
    21  )
    22  
    23  var (
    24  	pathEscaper = strings.NewReplacer(
    25  		`\`, `\\`,
    26  		` `, `\ `,
    27  		`#`, `\#`,
    28  		`*`, `\*`,
    29  		`[`, `\[`,
    30  		`|`, `\|`)
    31  )
    32  
    33  // WriteDepFile creates a new gcc-style depfile and populates it with content
    34  // indicating that target depends on deps.
    35  func WriteDepFile(filename, target string, deps []string) error {
    36  	f, err := os.Create(filename)
    37  	if err != nil {
    38  		return err
    39  	}
    40  	defer f.Close()
    41  
    42  	var escapedDeps []string
    43  
    44  	for _, dep := range deps {
    45  		escapedDeps = append(escapedDeps, pathEscaper.Replace(dep))
    46  	}
    47  
    48  	_, err = fmt.Fprintf(f, "%s: \\\n %s\n", target,
    49  		strings.Join(escapedDeps, " \\\n "))
    50  	if err != nil {
    51  		return err
    52  	}
    53  
    54  	return nil
    55  }