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extension_import_files.go
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/
extension_import_files.go
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package config
import (
"fmt"
"os"
"path/filepath"
"regexp"
"strings"
"github.com/gruntwork-io/terragrunt/options"
"github.com/gruntwork-io/terragrunt/util"
)
// ImportFiles is a configuration of files that must be imported from another directory to the terraform directory
// prior executing terraform commands
type ImportFiles struct {
TerragruntExtensionBase `hcl:",squash"`
Source string `hcl:"source"`
Files []string `hcl:"files"`
CopyAndRename []copyAndRename `hcl:"copy_and_remove"`
Required *bool `hcl:"required,omitempty"`
ImportIntoModules bool `hcl:"import_into_modules"`
FileMode *int `hcl:"file_mode"`
Target string `hcl:"target"`
Prefix *string `hcl:"prefix"`
}
// CopyAndRename is a structure used by ImportFiles to rename the imported files
type copyAndRename struct {
Source string `hcl:"source"`
Target string `hcl:"target"`
}
func (item ImportFiles) itemType() (result string) { return ImportFilesList{}.argName() }
func (item *ImportFiles) normalize() {
if item.Required == nil {
def := true
item.Required = &def
}
if item.Prefix == nil {
reg := regexp.MustCompile("[^a-zA-Z]+")
prefix := reg.ReplaceAllString(util.EncodeBase64Sha1(item.Name), "") + "_"
item.Prefix = &prefix
}
}
func (item ImportFiles) help() (result string) {
if item.Description != "" {
result += fmt.Sprintf("\n%s\n", item.Description)
}
if item.Source != "" {
result += fmt.Sprintf("\nFrom %s:\n", item.Source)
} else {
result += fmt.Sprint("\nFile(s):\n")
}
target, _ := filepath.Rel(item.options().WorkingDir, item.Target)
for _, file := range item.Files {
target := filepath.Join(target, fmt.Sprintf("%s%s", *item.Prefix, filepath.Base(file)))
if strings.Contains(file, "/terragrunt-cache/") {
file = filepath.Base(file)
}
result += fmt.Sprintf(" %s → %s\n", file, target)
}
required := true
if item.Required != nil {
required = *item.Required
}
attributes := []string{fmt.Sprintf("Required = %v", required)}
if item.ImportIntoModules {
attributes = append(attributes, "Import into modules")
}
if item.FileMode != nil {
attributes = append(attributes, fmt.Sprintf("File mode = %#o", *item.FileMode))
}
result += fmt.Sprintf("\n%s\n", strings.Join(attributes, ", "))
return
}
func (item *ImportFiles) importFiles(folders ...interface{}) (err error) {
logger := item.logger()
if !item.enabled() {
logger.Debugf("Import file %s skipped, executed only on %v", item.Name, item.OS)
return
}
if item.Source == "" && len(item.Files) == 0 && len(item.CopyAndRename) == 0 {
logger.Debugf("Import file %s skipped, nothing to do", item.Name)
return
}
// If no folders are specified, we only copy elements to the working folder
if len(folders) == 0 {
folders = []interface{}{item.options().WorkingDir}
}
var sourceFolder, sourceFolderPrefix string
if sourceFolder, err = item.config().GetSourceFolder(item.Name, item.Source, *item.Required); err != nil {
return err
} else if sourceFolder != "" {
sourceFolderPrefix = fmt.Sprintf("%s%c", sourceFolder, filepath.Separator)
} else if item.Source != "" {
return
}
for _, folder := range folders {
var messages []string
if item.Source != "" {
messages = append(messages, fmt.Sprintf("from %s", item.Source))
}
folder := folder.(string)
isModule := item.options().WorkingDir != folder
if isModule {
if !item.ImportIntoModules {
// We skip import in the folder if the item doesn't require to be applied on modules
continue
}
}
// Check if the item has a specific target folder
importerTarget := folder
if item.Target != "" {
if filepath.IsAbs(item.Target) {
importerTarget = item.Target
} else {
importerTarget = filepath.Join(folder, item.Target)
}
err = os.MkdirAll(importerTarget, 0755)
if err != nil {
return
}
} else {
importerTarget = folder
}
relativeTarget := util.GetPathRelativeToMax(importerTarget, item.options().WorkingDir, 2)
if relativeTarget != "" && relativeTarget != "." {
messages = append(messages, fmt.Sprintf("to %s", relativeTarget))
}
if *item.Prefix != "" {
messages = append(messages, fmt.Sprintf("prefixed by %s", *item.Prefix))
}
contextMessage := fmt.Sprintf(" %s", strings.Join(messages, " "))
// Local copy function used by both type of file copy
copy := func(source, target string) error {
// If the target should be prefixed, we change the target to insert the prefix before the base name
folder, file := filepath.Split(target)
target = filepath.Join(folder, *item.Prefix+file)
logger.Debugf("Copy file %s to %s", util.GetPathRelativeToMax(source, item.options().WorkingDir, 2), util.GetPathRelativeToMax(target, item.options().WorkingDir, 2))
os.MkdirAll(folder, os.ModePerm)
if err := util.CopyFile(source, target); err != nil {
return err
}
if item.FileMode != nil {
return os.Chmod(target, os.FileMode(*item.FileMode))
}
return nil
}
type fileCopy struct {
source, target string
}
var sourceFiles []fileCopy
if len(item.Files) == 0 {
item.Files = []string{"*"}
}
for _, pattern := range item.Files {
name := pattern
if !filepath.IsAbs(pattern) {
pattern = filepath.Join(sourceFolder, pattern)
}
var newFiles []fileCopy
var files []string
files, err = filepath.Glob(pattern)
if err != nil {
err = fmt.Errorf("Invalid pattern in %s", pattern)
return
}
for _, file := range files {
if err := ensureIsFile(file); err != nil {
logger.Warningf("%s(%s): %v", item.itemType(), item.id(), err)
} else {
newFiles = append(newFiles, fileCopy{source: file})
}
}
if *item.Required && len(newFiles) == 0 {
err = fmt.Errorf("Unable to import required file %s", strings.Join(item.Files, ", "))
return
}
for i := range newFiles {
if item.Target != "" || filepath.IsAbs(newFiles[i].source) {
newFiles[i].target = filepath.Join(importerTarget, filepath.Base(newFiles[i].source))
} else {
newFiles[i].target = filepath.Join(importerTarget, strings.TrimPrefix(newFiles[i].source, sourceFolderPrefix))
}
}
sourceFiles = append(sourceFiles, newFiles...)
if len(newFiles) == 1 {
logger.Infof("Import file %s%s", util.GetPathRelativeToMax(newFiles[0].source, item.options().WorkingDir, 2), contextMessage)
} else {
copiedFiles := make([]string, len(newFiles))
for i := range newFiles {
copiedFiles[i] = util.GetPathRelativeToMax(newFiles[i].target, item.options().WorkingDir, 2)
}
logger.Infof("Import file %s: %s%s", name, strings.Join(copiedFiles, ", "), contextMessage)
}
}
for _, source := range sourceFiles {
if util.FileExists(source.source) {
if err = copy(source.source, source.target); err != nil {
return
}
} else if *item.Required {
err = fmt.Errorf("Unable to import required file %s", source)
return
} else if !isModule {
logger.Debugf("Skipping copy of %s, the source is not found", source)
}
}
for _, source := range item.CopyAndRename {
if util.FileExists(source.Source) {
if !filepath.IsAbs(source.Target) {
source.Target = filepath.Join(importerTarget, source.Target)
}
logger.Infof("Import file %s to %s%s", filepath.Base(source.Source), source.Target, contextMessage)
if err = copy(source.Source, source.Target); err != nil {
return
}
} else if *item.Required {
err = fmt.Errorf("Unable to import required file %s", source.Source)
return
} else if !isModule {
logger.Debugf("Skipping copy of %s, the source is not found", source)
}
}
}
return
}
func ensureIsFile(file string) error {
if stat, err := util.FileStat(file); err != nil {
return err
} else if stat.IsDir() {
return fmt.Errorf("Folder ignored %s", file)
}
return nil
}
// ----------------------- ImportFilesList -----------------------
//go:generate genny -in=extension_base_list.go -out=generated_import_files.go gen "GenericItem=ImportFiles"
func (list ImportFilesList) argName() string { return "import_files" }
func (list ImportFilesList) sort() ImportFilesList { return list }
// Merge elements from an imported list to the current list
func (list *ImportFilesList) Merge(imported ImportFilesList) {
list.merge(imported, mergeModePrepend, list.argName())
}
// RunOnModules executes list configuration on module folders
func (list ImportFilesList) RunOnModules(terragruntOptions *options.TerragruntOptions) (err error) {
if len(list) == 0 {
return
}
modules, _ := filepath.Glob(filepath.Join(terragruntOptions.WorkingDir, ".terraform", "modules", "*"))
folders := make(map[string]int)
for _, module := range modules {
stat, err := util.FileStat(module)
if err != nil {
return err
}
if !stat.IsDir() {
continue
}
stat, _ = os.Lstat(module)
if !stat.IsDir() {
link, err := os.Readlink(module)
if err != nil {
return err
}
module = link
}
folders[module] = folders[module] + 1
}
if len(folders) == 0 {
return
}
keys := make([]interface{}, 0, len(folders))
for key := range folders {
keys = append(keys, key)
}
return list.Run(nil, keys...)
}
// Run execute the content of the list
func (list ImportFilesList) Run(status error, args ...interface{}) (err error) {
if len(list) == 0 {
return
}
list.sort()
for _, item := range list.Enabled() {
item.logger().Infof("Running %s (%s): %s", item.itemType(), item.id(), item.name())
if err := item.importFiles(args...); err != nil {
return err
}
}
return
}