fix auto update

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.0.3] - 2021-04-20
+
+### Fixed
+
+- Auto upgrade script was not working on linux as linux does not support writing to the binary that is being executed
+
 ## [1.0.2] - 2021-04-20
 
 ### Added

RELEASE.md

@@ -1,9 +1,9 @@
 # Releasing
 
-Releases are handled by the CD server with includes checksums for each binary.
+Releases are automatically built by the github workflow and uploaded to the release.
 
-```bash
-git tag 0.x
-git push
-git push origin --tags
-```
+1. Bump `VERSION` in `internal/config.go`.
+2. Update `CHANGELOG.md`
+3. Commit to master
+4. Create a new release with the `v1.2.3` tag and mark as draft.
+5. The Github action will build the binaries, upload and mark the release as ready when done.

internal/bins/bins.go

@@ -72,14 +72,21 @@ func downloadAndInstallAsset(body GithubRelease, name string) error {
 			// Uncompress
 			bz := bzip2.NewReader(resp.Body)
 
-			// Save binary
-			file, err := os.Create(path.Join(INSTALL_PATH, name))
+			// Save to tmp
+			// Linux does not support overwriting the file that is currently being overwritten, but it can be deleted and a new one moved in its place.
+			tmp, err := ioutil.TempFile(os.TempDir(), "autorestic-")
 			if err != nil {
 				return err
 			}
-			file.Chmod(0755)
-			defer file.Close()
-			io.Copy(file, bz)
+			defer tmp.Close()
+			tmp.Chmod(0755)
+			io.Copy(tmp, bz)
+
+			to := path.Join(INSTALL_PATH, name)
+			os.Remove(to) // Delete if current, ignore error if file does not exits.
+			if err := os.Rename(tmp.Name(), to); err != nil {
+				return nil
+			}
 
 			colors.Success.Printf("Successfully installed '%s' under %s\n", name, INSTALL_PATH)
 			return nil

internal/config.go

@@ -12,7 +12,7 @@ import (
 	"github.com/spf13/viper"
 )
 
-const VERSION = "1.0.2"
+const VERSION = "1.0.3"
 
 var CI bool = false
 var VERBOSE bool = false