gopkg.in/tools/godep.v54@v54.0.0-20160222173036-53bf4cf4341d/util.go (about)

     1  package main
     2  
     3  import (
     4  	"fmt"
     5  	"os/exec"
     6  	"path/filepath"
     7  	"runtime"
     8  )
     9  
    10  // Runs a command in dir.
    11  // The name and args are as in exec.Command.
    12  // Stdout, stderr, and the environment are inherited
    13  // from the current process.
    14  func runIn(dir, name string, args ...string) error {
    15  	_, err := runInWithOutput(dir, name, args...)
    16  	return err
    17  }
    18  
    19  func runInWithOutput(dir, name string, args ...string) (string, error) {
    20  	c := exec.Command(name, args...)
    21  	c.Dir = dir
    22  	o, err := c.CombinedOutput()
    23  
    24  	if debug {
    25  		fmt.Printf("execute: %+v\n", c)
    26  		fmt.Printf(" output: %s\n", string(o))
    27  	}
    28  
    29  	return string(o), err
    30  }
    31  
    32  // driveLetterToUpper converts Windows path's drive letters to uppercase. This
    33  // is needed when comparing 2 paths with different drive letter case.
    34  func driveLetterToUpper(path string) string {
    35  	if runtime.GOOS != "windows" || path == "" {
    36  		return path
    37  	}
    38  
    39  	p := path
    40  
    41  	// If path's drive letter is lowercase, change it to uppercase.
    42  	if len(p) >= 2 && p[1] == ':' && 'a' <= p[0] && p[0] <= 'z' {
    43  		p = string(p[0]+'A'-'a') + p[1:]
    44  	}
    45  
    46  	return p
    47  }
    48  
    49  // clean the path and ensure that a drive letter is upper case (if it exists).
    50  func cleanPath(path string) string {
    51  	return driveLetterToUpper(filepath.Clean(path))
    52  }