tools

#!/bin/bash
function randpass {
	passlength=6
	[ ! -z "$1" ] && passlength=$1
	printf "%s\n" `< /dev/urandom tr -dc A-Za-z0-9 | head -c$passlength`
}

function ghblame {
	local fullpath=$1
	local path_no_lineno=${fullpath%:*}
	if [[ ! -e $path_no_lineno ]]; then
		printf "%s %s\n" "$path_no_lineno" "does not exist" >&2
		return 1
	fi
	local lineno=${fullpath#*:}
	if [[ $lineno =~ [0-9]+ ]]; then
		lineno="#L$lineno"
	else
		lineno=""
	fi

	local abs_path=$(cd "${path_no_lineno%/*}" &>/dev/null; printf "%s/%s" "$(pwd)" "${path_no_lineno##*/}")
	local file_dir=${abs_path%/*}

	local in_git_repo
	[ -d $file_dir/.git ] || (cd $file_dir; git rev-parse --git-dir) > /dev/null 2>&1
	in_git_repo=$?
	if [[ $in_git_repo != 0 ]]; then
		printf "%s\n" "Not in a git repo" >&2
		return in_git_repo
	fi

	local root=$(cd $file_dir >/dev/null; git rev-parse --show-toplevel)
	local ref
	ref=$(cd $root >/dev/null; git symbolic-ref HEAD 2>/dev/null)
	if [[ $? != 0 ]]; then
		printf "%s\n" "Not on any branch" >&2
		return 1
	fi

	local branch=${ref#refs/heads/}
	local remote_name=$(cd $root >/dev/null; git config branch.$branch.remote 2>/dev/null)
	local remote_url=$(cd $root >/dev/null; git config remote.$remote_name.url 2>/dev/null)

	if [[ ! $remote_url =~ 'github.com' ]]; then
		printf "%s\n" "Upstream is not a github repo" >&2
		return 1
	fi
	local remote_dir
	remote_dir=${remote_url#git@github.com:}
	remote_dir=${remote_dir#https://github.com/}
	local rel_path=${abs_path#$root}
	open "https://github.com/$remote_dir/blame/$branch$rel_path$lineno"
}

# A util function to setup missing file paths that some programs and scrips
# expect.
function setupTempPaths {
	mkdir -p ~/tmp/sessions
	touch ~/.tmux.conf.local
	touch ~/.vim/local.vim
	touch ~/.vim/local_gui.vim
	touch ~/.bash_aliases
	if [[ ! -e ~/.bash_modules ]]; then
		cat > ~/.bash_modules <<-"EOF"
			# bash_modules - defines what modules to load into the bash environment
			# Repository at http://github.com/sukima/dotfiles
			# Generated for the first time by repository install.sh.
			#
			# Uncomment any of the following modules to load on next shell invocation.
			EOF
		for p in ~/.homesick/repos/dotfiles/bash/modules.d/*; do
			echo
			egrep "^#[^!][ 	]*[^ 	]" $p | head -n1
			echo "# $(basename $p)"
		done >> ~/.bash_modules
	fi
}

# Convinience method to check if a command exists or not.
function command_exists {
	hash "$1" &> /dev/null
}

# Utility functions to manipulate the PATH.
# Used to prevent duplicates on multiple calls.
function inPath {
	echo "${PATH}" | grep "$1" > /dev/null
}
function notInPath {
	if inPath "$1"; then
		return 1
	else
		return 0
	fi
}
function addToPath {
	if notInPath "$1"; then
		PATH="${PATH}:$1"
	fi
	export PATH
}
function prependToPath {
	if notInPath "$1"; then
		PATH="$1:${PATH}"
	fi
	export PATH
}

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