Git script for creating and modifying .gitignore files

git-ignore

#!/bin/bash

## REPO -- https://github.com/github/gitignore
## DOWNLOADS
DL_IGNORE_URL="https://raw.github.com/github/gitignore/master/"
IGNORE_TREE_URL="https://api.github.com/repos/github/gitignore/git/trees/master"

CACHE_IGNORE_LIST="$HOME/.cache/gitignore_list"
CACHE_IGNORE_NAMES="$HOME/.cache/gitignore_list_names"

function init_cache() {
  if [ ! -d  $HOME/.cache ] ; then
    mkdir -p $HOME/.cache 2> /dev/null
  fi

  if [ ! -f $CACHE_IGNORE_LIST ] ; then
    curl -o $CACHE_IGNORE_LIST -qs $IGNORE_TREE_URL 
  fi
}

function get_ignore_names() {
    grep -E 'path":.*\.gitignore' $CACHE_IGNORE_LIST \
      | sed 's/.* "\([^"]*\).gitignore",/\1/' \
      > $CACHE_IGNORE_NAMES
}

function list_ignore_names() {
  if [ ! -f $CACHE_IGNORE_NAMES -o $CACHE_IGNORE_NAMES -ot $CACHE_IGNORE_LIST ] ; then
    get_ignore_names
  fi
  cat $CACHE_IGNORE_NAMES
}

function display_default_gitignore() {
  cat <<-EOM | sed 's/^ *//'
  *~
  *.lock
  .*.swp
  *.log
  tmp/
  db/*
  *.DS_Store
  *#
  .svn
  .pyc
EOM
}

function get_ignore_file() {
  curl -qs "${DL_IGNORE_URL}/${1}.gitignore"
}

function show_gitignore() {
  if [ "$1" = "" ] ; then
      display_default_gitignore
  else
    match=$(grep -i "$1" "$CACHE_IGNORE_NAMES")
    r=$?
    if [ "$r" = 0 ] ; then
      get_ignore_file "$match"
    else
      echo "Could not find that name.  See the list command"
    fi
  fi
}

function add_ignores() {
  for i in "$@"
  do
    echo $i | tee -a ".gitignore"
  done
}

#### Execution Starts Here

if [ ! "$1" = "init" -a ! "$1" = "list" -a ! "$1" = "add"  ] ; then
  echo "usage: git ignore <init [TYPE]|list|add <pattern> [pattern2] [...]>"
  exit 1
fi

init_cache

case $1 in
  "init")
    show_gitignore "$2"
    ;;
  "list")
    list_ignore_names
    ;;
  "add")
    if [ "$2" = "" ] ; then
      echo "Must give at least one pattern to ignore"
      exit 1
    fi
    shift
    add_ignores "$@"
    ;;
  *)
    echo "Unknown command $1"
    ;;
esac

That's an amazing list. I'd forgotten how many languages there were since I only use a few now.

This may not be appropriate for directly including in the gitignore repo but I thought it may be interesting for people (@Aqua-Ye, @xpaulbettsx) interested in the @github ignore templates...