Merge pull request #11 from gennaro-tedesco/tags_fun

tags fun

README.md

@@ -53,6 +53,7 @@ takes one of the following arguments or flags
 | -p,prs       | view, diff and checkout PR                | enter: checkout selected PR<br>ctrl-d: diff selected PR<br>ctrl-v: view selected PR
 | -b,branches  | checkout and diff branches                | enter: checkout selected branch<br>ctrl-d: diff selected branch<br>ctrl-x: delete selected branch
 | -l,logs      | select commits and show diff              | enter: show selected commit diff
+| -t,tags      | checkout and diff version tags            | enter: checkout tag in detached HEAD<br>ctrl-d diff against current branch
 | -s,search    | search issues in any repository           | interactive prompt: follow instructions
 | -m,myissue   | search issues you opened somewhere        | interactive prompt: follow instructions
 | -k,pick      | cherrypick files between branches         | enter: checkout cherrypicked files from branch
@@ -64,7 +65,8 @@ Most commands follow the semantics of `git` standard instructions (so that you c
 ## Customisation
 If you want to skip typing `gh f` before each command you may alias it directly, for instance
 ```
-gh set alias prs --shell `gh f -p`
+gh set alias prs `f -p` # show PRs
+gh set alias l `f -l` # show git logs
 ```
 and likewise for the rest.
 

gh-f

@@ -20,6 +20,7 @@ COMMANDS
   -p|prs: view, diff and checkout PR
   -b|branches: checkout and diff branches
   -l|logs: select commits and show diff
+  -t|tags: checkout and diff version tags
   -s|search: search issues in any repository
   -m|myissue: search issues you opened somewhere
   -k|pick: cherrypick files from one branch to the other
@@ -55,6 +56,11 @@ USAGE
 	file paths can be passed as positional arguments
   	enter: show selected commit diff
 
+  gh f -t | gh f tags
+
+  	enter: checkout the tag in detached HEAD state
+	ctrl-d: diff the tag against current branch
+
   gh f -s | gh f search
 
   	prompt for repository name and issue title
@@ -203,6 +209,30 @@ logs() {
 	[[ -n ${commit} ]] && cut -f1 -d' ' <<<"$commit" | xargs -n1 git show
 }
 
+tags() {
+	if ! is_git_repo; then {
+		echo "not a git repo"
+		exit
+	}; fi
+	lines="$(
+		git tag -l -n | awk -F' {2,}' -v ID_COLOUR="$ID_COLOUR" -v TEXT_COLOUR="$TEXT_COLOUR" -v SHELL_COLOUR="$SHELL_COLOUR" '{print ID_COLOUR $1 SHELL_COLOUR" - " TEXT_COLOUR $2}' |
+			fzf \
+				--exit-0 \
+				--ansi --delimiter=- \
+				--prompt="tags:" \
+				--preview="GH_FORCE_TTY=$FZF_PREVIEW_COLUMNS git diff --stat --color=always {1} 2>/dev/null" \
+				--expect="enter,ctrl-d"
+	)"
+
+	key="$(head -1 <<<"$lines")"
+	tag="$(sed 1d <<<"$lines" | cut -d '-' -f1 | tr -d ' ')"
+
+	case "$key" in
+	enter) git checkout tags/"$tag" ;;
+	ctrl-d) git diff "$tag" ;;
+	esac
+}
+
 search() {
 	read -rp "repository name: " repo
 	[[ -z $repo ]] && exit
@@ -290,6 +320,10 @@ while [[ "$#" -gt 0 ]]; do
 		logs "$@"
 		shift
 		;;
+	-t | tags)
+		tags
+		shift
+		;;
 	-s | search)
 		search
 		shift