remove sembump tool as no longer installable with go tools (#1631)

* remove sembump tool as no longer installable with go tools

* update the documentation: release notes in contributing

CONTRIBUTING.md

@@ -198,22 +198,28 @@ To cut a release, push a new tag (versioning discussed below).
 
 ### Tagging a release
 
-1. Run `make changes` to review the changes since the last
-   release. Based on the changes, decide what kind of release you are
-   doing (bugfix, feature or breaking).
-   `doctl` follows [semantic versioning](https://semver.org), ask if you aren't sure.
+1. Run `make changes` to review the changes since the last release.  
+Based on the changes, decide what kind of release you are doing (bugfix, feature or breaking).  
+`doctl` follows [semantic versioning](https://semver.org), ask if you aren't sure.  
 
 1. Synchronize your local repository with all the tags that have been created or updated on the remote main branch
     ```bash
     git checkout main
     git pull --tags
     ```
 
-1. Creates a new tag and push the tag to the remote repository named origin
-    ```bash
-    git tag <new-tag> # Example: git tag v1.113.0
-    git push origin tag <new-tag> # Example: git push origin tag v1.113.0
-    ```
+1. Tag the release using `BUMP=(bugfix|feature|breaking) make tag`.  
+Example:  
+
+```bash
+BUMP=minor make tag
+```  
+
+Notes on `BUMP=(bugfix|feature|breaking) make tag`:
+  - BUMP accepts: `bugfix`, `feature`, `breaking` as well as `patch`, `minor` and `major` values.
+  - The command assumes you have a remote repository named `origin` pointing to this repository. 
+  If you'd prefer to specify a different remote repository, you can do so by setting `ORIGIN=(preferred remote name)`.
+  - The new tag triggers the release.
 
 To learn a bit more about how that all works, check out [goreleaser](https://goreleaser.com/intro) 
 and the config we use for it: [.goreleaser.yml](https://github.com/digitalocean/doctl/blob/main/.goreleaser.yml)

Makefile

@@ -178,14 +178,8 @@ version:
 	@echo ""
 	@ORIGIN=${ORIGIN} scripts/version.sh
 
-.PHONY: _install_sembump
-_install_sembump:
-	@echo "=> installing/updating sembump tool"
-	@echo ""
-	@GO111MODULE=off go get -u github.com/jessfraz/junk/sembump
-
 .PHONY: tag
-tag: _install_sembump
+tag:
 	@echo "==> BUMP=${BUMP} tag"
 	@echo ""
 	@ORIGIN=${ORIGIN} scripts/bumpversion.sh

scripts/bumpversion.sh

@@ -4,18 +4,25 @@ set -euo pipefail
 
 ORIGIN=${ORIGIN:-origin}
 
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+version="$("$DIR"/../scripts/version.sh -s)"
+IFS='.' read -r major minor patch <<< "$version"
+
 # Bump defaults to patch. We provide friendly aliases
 # for patch, minor and major
 BUMP=${BUMP:-patch}
 case "$BUMP" in
   feature | minor)
-    BUMP="minor"
+    minor=$((minor + 1))
+    patch=0
     ;;
   breaking | major)
-    BUMP="major"
+    major=$((major + 1))
+    minor=0
+    patch=0
     ;;
   *)
-    BUMP="patch"
+    patch=$((patch + 1))
     ;;
 esac
 
@@ -27,13 +34,10 @@ elif [[ $(git status --porcelain -b | grep -e "ahead" -e "behind") != "" ]]; the
   exit 1
 fi  
 
-DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
-
-version="$("$DIR"/../scripts/version.sh -s)"
-new_version="v$(sembump --kind "$BUMP" "$version")"
-
-echo "Bumping version from v${version} to ${new_version}"
+echo
+new_version="v${major}.${minor}.${patch}"
 
 git tag -m "release ${new_version}" -a "$new_version" && git push "${ORIGIN}" tag "$new_version"
 
-echo ""
+echo "Bumped version to ${new_version}"
+