/
generic_cp_copier.go
126 lines (102 loc) · 3.27 KB
/
generic_cp_copier.go
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package fileutil
import (
"os"
"path/filepath"
"strings"
"github.com/bmatcuk/doublestar"
bosherr "github.com/cloudfoundry/bosh-utils/errors"
boshlog "github.com/cloudfoundry/bosh-utils/logger"
boshsys "github.com/cloudfoundry/bosh-utils/system"
)
const genericCpCopierLogTag = "genericCpCopier"
type DirToCopy struct {
Dir string
Prefix string
}
type genericCpCopier struct {
fs boshsys.FileSystem
logger boshlog.Logger
}
func NewGenericCpCopier(
fs boshsys.FileSystem,
logger boshlog.Logger,
) Copier {
return genericCpCopier{fs: fs, logger: logger}
}
func (c genericCpCopier) FilteredCopyToTemp(dir string, filters []string) (string, error) {
return c.FilteredMultiCopyToTemp([]DirToCopy{{Dir: dir}}, filters)
}
func (c genericCpCopier) FilteredMultiCopyToTemp(dirs []DirToCopy, filters []string) (string, error) {
var err error
tempDir, err := c.fs.TempDir("bosh-platform-commands-cpCopier-FilteredCopyToTemp")
if err != nil {
return "", bosherr.WrapError(err, "Creating temporary directory")
}
err = os.Chmod(tempDir, os.FileMode(0755))
if err != nil {
c.CleanUp(tempDir)
bosherr.WrapError(err, "Fixing permissions on temp dir") //nolint:errcheck
}
for _, dirToCopy := range dirs {
globsFiles := c.convertDirectoriesToGlobs(dirToCopy.Dir, filters)
var filesToCopy []string
for _, globFile := range globsFiles {
filteredFilesToCopy, err := doublestar.Glob(globFile)
if err != nil {
c.CleanUp(tempDir)
return "", bosherr.WrapError(err, "Finding files matching filters")
}
for _, fileToCopy := range filteredFilesToCopy {
filesToCopy = append(filesToCopy, strings.TrimPrefix(strings.TrimPrefix(fileToCopy, dirToCopy.Dir), "/"))
}
}
err = c.copyFilesToDir(filesToCopy, dirToCopy.Dir, tempDir, dirToCopy.Prefix)
if err != nil {
c.CleanUp(tempDir)
return "", bosherr.WrapError(err, "Copying Files to Temp Dir")
}
}
return tempDir, nil
}
func (c genericCpCopier) CleanUp(tempDir string) {
err := c.fs.RemoveAll(tempDir)
if err != nil {
c.logger.Error(genericCpCopierLogTag, "Failed to clean up temporary directory %s: %#v", tempDir, err)
}
}
func (c genericCpCopier) copyFilesToDir(fileList []string, srcDir string, destDir string, destPrefix string) error {
destDir = filepath.Join(destDir, destPrefix)
for _, relativePath := range fileList {
src := filepath.Join(srcDir, relativePath)
dst := filepath.Join(destDir, relativePath)
fileInfo, err := os.Stat(src)
if err != nil {
return bosherr.WrapErrorf(err, "Getting file info for '%s'", src)
}
if !fileInfo.IsDir() {
dstContainingDir := filepath.Dir(dst)
err := c.fs.MkdirAll(dstContainingDir, os.ModePerm)
if err != nil {
return bosherr.WrapErrorf(err, "Making destination directory '%s' for '%s'", dstContainingDir, src)
}
err = c.fs.CopyFile(src, dst)
if err != nil {
return err
}
}
}
return nil
}
func (c genericCpCopier) convertDirectoriesToGlobs(dir string, filters []string) []string {
convertedFilters := []string{}
for _, filter := range filters {
src := filepath.Join(dir, filter)
fileInfo, err := os.Stat(src)
if err == nil && fileInfo.IsDir() {
convertedFilters = append(convertedFilters, filepath.Join(src, "**", "*"))
} else {
convertedFilters = append(convertedFilters, src)
}
}
return convertedFilters
}