131 lines
3.8 KiB
Go
131 lines
3.8 KiB
Go
package edit
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"path"
|
|
"path/filepath"
|
|
|
|
"github.com/spf13/cobra"
|
|
"github.com/warewulf/warewulf/internal/pkg/overlay"
|
|
"github.com/warewulf/warewulf/internal/pkg/util"
|
|
"github.com/warewulf/warewulf/internal/pkg/wwlog"
|
|
)
|
|
|
|
const initialTemplate = `# This is a Warewulf Template file.
|
|
#
|
|
# This file (suffix '.ww') will be automatically rewritten without the suffix
|
|
# when the overlay is rendered for the individual nodes. Here are some examples
|
|
# of macros and logic which can be used within this file:
|
|
#
|
|
# Node FQDN = {{.Id}}
|
|
# Node Cluster = {{.ClusterName}}
|
|
# Network Config = {{.NetDevs.eth0.Ipaddr}}, {{.NetDevs.eth0.Hwaddr}}, etc.
|
|
#
|
|
# Go to the documentation pages for more information:
|
|
# https://warewulf.org/docs/main/contents/overlays.html
|
|
#
|
|
# Keep the following for better reference:
|
|
# ---
|
|
# This file is autogenerated by warewulf
|
|
`
|
|
|
|
func CobraRunE(cmd *cobra.Command, args []string) (err error) {
|
|
overlayName := args[0]
|
|
fileName := args[1]
|
|
|
|
myOverlay, err := overlay.Get(overlayName)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
overlayFile := myOverlay.File(fileName)
|
|
wwlog.Debug("Will edit overlay file: %s", overlayFile)
|
|
overlayFileDir := path.Dir(overlayFile)
|
|
if !util.IsDir(overlayFileDir) && !CreateDirs {
|
|
return fmt.Errorf("%s does not exist. Use '--parents' option to create automatically", overlayFileDir)
|
|
}
|
|
|
|
tempFile, tempFileErr := os.CreateTemp("", "ww-overlay-edit-")
|
|
if tempFileErr != nil {
|
|
return fmt.Errorf("unable to create temporary file for editing: %s", tempFileErr)
|
|
}
|
|
defer func() { _ = os.Remove(tempFile.Name()) }()
|
|
wwlog.Debug("Using temporary file %s", tempFile.Name())
|
|
|
|
if util.IsFile(overlayFile) {
|
|
originalFile, openErr := os.Open(overlayFile)
|
|
if openErr != nil {
|
|
return fmt.Errorf("unable to open %s: %s", overlayFile, openErr)
|
|
}
|
|
if _, err := io.Copy(tempFile, originalFile); err != nil {
|
|
return fmt.Errorf("unable to copy %s to %s for editing: %s", originalFile.Name(), tempFile.Name(), err)
|
|
}
|
|
_ = originalFile.Close()
|
|
} else if filepath.Ext(overlayFile) == ".ww" {
|
|
if _, err := tempFile.Write([]byte(initialTemplate)); err != nil {
|
|
return fmt.Errorf("unable to write to %s: %s", tempFile.Name(), err)
|
|
}
|
|
}
|
|
if err := tempFile.Close(); err != nil {
|
|
return fmt.Errorf("failed to close temp file %s: %w", tempFile.Name(), err)
|
|
}
|
|
|
|
initialFile, err := os.Open(tempFile.Name())
|
|
if err != nil {
|
|
return fmt.Errorf("unable to open temp file for hashing: %s", err)
|
|
}
|
|
initialHash, err := util.HashFile(initialFile)
|
|
_ = initialFile.Close()
|
|
if err != nil {
|
|
return fmt.Errorf("unable to calculate initial hash of %s: %s", tempFile.Name(), err)
|
|
}
|
|
|
|
editor := os.Getenv("EDITOR")
|
|
if editor == "" {
|
|
editor = "/bin/vi"
|
|
}
|
|
if editorErr := util.ExecInteractive(editor, tempFile.Name()); editorErr != nil {
|
|
return fmt.Errorf("editor process exited with an error: %s", editorErr)
|
|
}
|
|
|
|
finalFile, err := os.Open(tempFile.Name())
|
|
if err != nil {
|
|
return fmt.Errorf("unable to open temp file for final hashing: %s", err)
|
|
}
|
|
finalHash, err := util.HashFile(finalFile)
|
|
_ = finalFile.Close()
|
|
if err != nil {
|
|
return fmt.Errorf("unable to calculate final hash of %s: %s", tempFile.Name(), err)
|
|
}
|
|
|
|
if initialHash == finalHash {
|
|
wwlog.Debug("No change detected. Not updating overlay.")
|
|
return nil
|
|
}
|
|
|
|
if !myOverlay.IsSiteOverlay() {
|
|
myOverlay, err = myOverlay.CloneToSite()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
overlayFile = myOverlay.File(fileName)
|
|
overlayFileDir = path.Dir(overlayFile)
|
|
}
|
|
|
|
if CreateDirs {
|
|
if err := os.MkdirAll(overlayFileDir, 0755); err != nil {
|
|
return fmt.Errorf("could not create directory: %s", overlayFileDir)
|
|
}
|
|
}
|
|
|
|
// using CopyFile preserves target file permissions
|
|
cerr := util.CopyFile(tempFile.Name(), overlayFile)
|
|
if cerr != nil {
|
|
return fmt.Errorf("unable to copy data from temp file: %s to target file: %s, err: %s", tempFile.Name(), overlayFile, err)
|
|
}
|
|
|
|
return nil
|
|
}
|