git-ignore-wizard

#!/usr/bin/env bash
# take a file/directory as arg1, to be added to ignore rules.
# the user selects which ignore rules using dmenu
# in the .gitconfig case, we should probably allow the user to edit it,
# because he probably wants a more generic pattern instead of the real
# basename

file=$1
if [[ -z "$file" || ! -e "$file" ]]
then
	echo 'No such file or directory' >&2
	exit 2
fi

type=$(echo \
".gitignore-root    # files all developers of this repo will want to exclude, in one central location
.gitignore-dirname # same, but ignore file in parent directory, so you can have multiple .gitignore files
exclude            # specific to it's repo, but irrelevant to other devs
.gitconfig         # patterns you want to ignore, independent of the repository
" | dmenu | cut -d ' ' -f1)

[ -z "$type" ] && echo 'Cancelled' && exit 0

dirname=$( dirname  "$file")
basename=$(basename "$file")
case $type in
	.gitignore-root)
		root=$(git root "$file") || exit 2
		dirname=$(readlink -f "$dirname")
		relative_dir=$(echo "$dirname" | sed "s#^$root##") # ie: /src
		echo "$relative_dir/$basename" >> "$root/.gitignore"
		;;
	.gitignore-dirname)
		git root "$file ">/dev/null || exit 2
		echo "$basename" >> "$dirname/.gitignore"
		;;
	exclude)
		root=$(git root "$file") || exit 2
		dirname=$(readlink -f "$dirname")
		relative_dir=$(echo "$dirname" | sed "s#^$root##")
		echo "$relative_dir/$basename" >> "$root/info/exclude"
		;;
	.gitconfig)
		#TODO. git config --get-all ?, then another dmenu? how many such config keys are allowed?
esac