github.com/cmalfait/terraform@v0.11.12-beta1/helper/pathorcontents/read.go (about)

     1  // Helpers for dealing with file paths and their contents
     2  package pathorcontents
     3  
     4  import (
     5  	"io/ioutil"
     6  	"os"
     7  
     8  	"github.com/mitchellh/go-homedir"
     9  )
    10  
    11  // If the argument is a path, Read loads it and returns the contents,
    12  // otherwise the argument is assumed to be the desired contents and is simply
    13  // returned.
    14  //
    15  // The boolean second return value can be called `wasPath` - it indicates if a
    16  // path was detected and a file loaded.
    17  func Read(poc string) (string, bool, error) {
    18  	if len(poc) == 0 {
    19  		return poc, false, nil
    20  	}
    21  
    22  	path := poc
    23  	if path[0] == '~' {
    24  		var err error
    25  		path, err = homedir.Expand(path)
    26  		if err != nil {
    27  			return path, true, err
    28  		}
    29  	}
    30  
    31  	if _, err := os.Stat(path); err == nil {
    32  		contents, err := ioutil.ReadFile(path)
    33  		if err != nil {
    34  			return string(contents), true, err
    35  		}
    36  		return string(contents), true, nil
    37  	}
    38  
    39  	return poc, false, nil
    40  }