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add support for lifecycle ignore_changes #35

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add support for lifecycle ignore_changes #35

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53fd0f2
add support for lifecycle ignore_changes
Dec 29, 2019
0bf35c5
add file mode validation
Dec 30, 2019
f67914c
linting
Feb 20, 2020
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44 changes: 28 additions & 16 deletions local/resource_local_file.go
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@ import (
"crypto/sha1"
"encoding/base64"
"encoding/hex"
"fmt"
"io/ioutil"
"os"
"path"
Expand All @@ -14,10 +15,16 @@ import (

func resourceLocalFile() *schema.Resource {
return &schema.Resource{
Create: resourceLocalFileCreate,
Read: resourceLocalFileRead,
Create: resourceLocalFileCreate,
Delete: resourceLocalFileDelete,

Update: nil,
Exists: func(d *schema.ResourceData, meta interface{}) (bool, error) {
if _, err := os.Stat(d.Get("filename").(string)); os.IsNotExist(err) {
return false, nil
}
return true, nil
},
Schema: map[string]*schema.Schema{
"content": {
Type: schema.TypeString,
Expand Down Expand Up @@ -65,25 +72,30 @@ func resourceLocalFile() *schema.Resource {
}

func resourceLocalFileRead(d *schema.ResourceData, _ interface{}) error {
// If the output file doesn't exist, mark the resource for creation.
outputPath := d.Get("filename").(string)
if _, err := os.Stat(outputPath); os.IsNotExist(err) {
d.SetId("")
return nil
// Get actual content from file.
filePath := d.Get("filename").(string)
byteContent, err := ioutil.ReadFile(filePath)
if err != nil {
return err
}

// Verify that the content of the destination file matches the content we
// expect. Otherwise, the file might have been modified externally and we
// must reconcile.
outputContent, err := ioutil.ReadFile(outputPath)
if err != nil {
var setErr error

// Set file_permission to match what is on disk.
stat, _ := os.Stat(filePath)
setErr = d.Set("file_permission", fmt.Sprintf("%04o", stat.Mode().Perm()))
if setErr != nil {
return err
}

outputChecksum := sha1.Sum([]byte(outputContent))
if hex.EncodeToString(outputChecksum[:]) != d.Id() {
d.SetId("")
return nil
// Set `content` or `content_base64` to match current value on disk.
if _, exists := d.GetOkExists("content"); exists {
setErr = d.Set("content", string(byteContent))
} else if _, exists := d.GetOkExists("content_base64"); exists {
setErr = d.Set("content_base64", base64.StdEncoding.EncodeToString(byteContent))
}
if setErr != nil {
return err
}

return nil
Expand Down