iankelling.org Git - small-misc-bash/blob - gitget

   1 #!/bin/bash
   2 # Copyright (C) 2016 Ian Kelling
   3
   4 # Licensed under the Apache License, Version 2.0 (the "License");
   5 # you may not use this file except in compliance with the License.
   6 # You may obtain a copy of the License at
   7
   8 #     http://www.apache.org/licenses/LICENSE-2.0
   9
  10 # Unless required by applicable law or agreed to in writing, software
  11 # distributed under the License is distributed on an "AS IS" BASIS,
  12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 # See the License for the specific language governing permissions and
  14 # limitations under the License.
  15
  16 gitget() {
  17     local help="Usage: gitget [--help] [REPO_URL] [REPO_DIR]
  18 Idempotent git clone/pull
  19
  20 If repo exists, pull.
  21 Without arguments, just git pull.
  22 REPO_DIR is, or will become the root of the repo."
  23
  24     if [[ $1 == --help ]]; then
  25         echo "$help"
  26         return
  27     fi
  28     if (( $# >= 3 )); then
  29         echo error: expected 2 or less arguments, got $#
  30         echo "$help"
  31         return 1
  32     fi
  33     if [[ $# == 0 ]]; then
  34         git pull
  35         return $?
  36     fi
  37
  38     local workingdir
  39     local orig_dir="$PWD"
  40     local ret
  41     if [[ $1 == *[^/].git ]]; then
  42         if [[ $2 ]]; then
  43             workingdir="$2"
  44         else
  45             workingdir="${1##*/}"
  46             workingdir="${workingdir%.git}"
  47         fi
  48     elif (( $# == 2 )); then
  49         echo error: 2 arguments given but the first does not end in .git
  50         echo "$help"
  51         return 1
  52     else
  53         workingdir="$1"
  54         if [[ ! -d $workingdir/.git ]]; then
  55             echo "error: expected $workingdir/.git to exist"
  56             return 1
  57         fi
  58     fi
  59     [[ -d $workingdir ]] || mkdir -p "$workingdir"
  60     cd "$workingdir"
  61     if [[ -d .git ]]; then
  62         git pull
  63         ret=$?
  64     else
  65         git clone "$1" .
  66         ret=$?
  67     fi
  68     cd "$orig_dir"
  69     return $ret
  70 }
  71 gitget "$@"