github.com/bendemaree/terraform@v0.5.4-0.20150613200311-f50d97d6eee6/config/module/detect_file.go (about)

     1  package module
     2  
     3  import (
     4  	"fmt"
     5  	"os"
     6  	"path/filepath"
     7  	"runtime"
     8  )
     9  
    10  // FileDetector implements Detector to detect file paths.
    11  type FileDetector struct{}
    12  
    13  func (d *FileDetector) Detect(src, pwd string) (string, bool, error) {
    14  	if len(src) == 0 {
    15  		return "", false, nil
    16  	}
    17  
    18  	if !filepath.IsAbs(src) {
    19  		if pwd == "" {
    20  			return "", true, fmt.Errorf(
    21  				"relative paths require a module with a pwd")
    22  		}
    23  
    24  		// Stat the pwd to determine if its a symbolic link. If it is,
    25  		// then the pwd becomes the original directory. Otherwise,
    26  		// `filepath.Join` below does some weird stuff.
    27  		//
    28  		// We just ignore if the pwd doesn't exist. That error will be
    29  		// caught later when we try to use the URL.
    30  		if fi, err := os.Lstat(pwd); !os.IsNotExist(err) {
    31  			if err != nil {
    32  				return "", true, err
    33  			}
    34  			if fi.Mode()&os.ModeSymlink != 0 {
    35  				pwd, err = os.Readlink(pwd)
    36  				if err != nil {
    37  					return "", true, err
    38  				}
    39  			}
    40  		}
    41  
    42  		src = filepath.Join(pwd, src)
    43  	}
    44  
    45  	return fmtFileURL(src), true, nil
    46  }
    47  
    48  func fmtFileURL(path string) string {
    49  	if runtime.GOOS == "windows" {
    50  		// Make sure we're using "/" on Windows. URLs are "/"-based.
    51  		path = filepath.ToSlash(path)
    52  		return fmt.Sprintf("file://%s", path)
    53  	}
    54  
    55  	// Make sure that we don't start with "/" since we add that below.
    56  	if path[0] == '/' {
    57  		path = path[1:]
    58  	}
    59  	return fmt.Sprintf("file:///%s", path)
    60  }