Alias to amend and move git tags

.gitconfig

	### Tags
	
	# Return date of tag. (To use in another alias)
	tag-date = "!git show $1 | awk '{ if ($1 == \"Date:\") { print substr($0, index($0,$3)) }}' | tail -2 | head -1 #"
	# Show tag message
	tag-message = "!git show $1 | awk -v capture=0 '{ if(capture) message=message\"\\n\"$0}; BEGIN {message=\"\"}; { if ($1 == \"Date:\" && length(message)==0 ) {capture=1}; if ($1 == \"commit\" ) {capture=0}  }; END { print message }' | sed '$ d' | cat -s #"

	# Get hash of tag commit
	tag-commit = "!git show $1 | awk '{ if ($1 == \"commit\") { print $2 }}' #"
	
	### Amend tag message. Can edit current tag-message.
	taga = "!GIT_TAG_COMMIT=$(git tag-commit $1) && GIT_COMMITTER_DATE=$(git tag-date $1) && git tag -a $1 $GIT_TAG_COMMIT -f #"

	### Move tag. Use: git tagm <tagname> <newcommit> 
	tagm = "!GIT_TAG_MESSAGE=$(git tag-message $1) && GIT_COMMITTER_DATE=$(git tag-date $1) && git tag-message $1 && git tag -d $1 && git tag -a $1 $2 -m \"$GIT_TAG_MESSAGE\" #"

	### Move pushed tag. Use: git tagmp <tagname> <newcommit> 
	tagmp = "!git tagm $1 $2 && git push --delete origin $1 && git push origin $1 #"
	
	### Amend pushed tag message
	tagap = "!git taga $1 && git push origin $1 --force #"	

Samples:

Amend tag 'v1.3.1' message:
git taga v1.3.1

If pushed:
git tagap v1.3.1

Move tag v1.3.1 to commit ac5bc6d8:
git tagm v1.3.1 ac5bc6d8

If pushed:
git tagmp v1.3.1 ac5bc6d8