vcsh

   1 #!/bin/sh
   2
   3 [ -n "$VCSH_DEBUG" ]      && set -x
   4 [ -z "$XDG_CONFIG_HOME" ] && XDG_CONFIG_HOME="$HOME/.config"
   5 [ -z "$VCSH_BASE" ]       && VCSH_BASE="$XDG_CONFIG_HOME/vcsh/repo.d"
   6
   7 SELF=$(basename $0)
   8
   9
  10 help() {
  11         echo "usage: $SELF <args>
  12
  13    clone <remote> \\
  14          [<repo>]       Clone from an existing repository
  15    help                 Display this help text
  16    delete               Delete an existing repository
  17    init <repo>          Initialize a new repository
  18    list                 List all repos
  19    run <repo> \\
  20        <command>        Use this repository
  21
  22    seed-gitignore \\
  23    <repo>               Seed .gitignore.d/<repo> from git ls-files
  24
  25    <repo> <git command> Special command that allows you to run git commands
  26                         directly without having to type so much ;)" >&2
  27 #   use <repo>     Use this repository
  28 #
  29 #   exit              Exit vcsh mode" >&2
  30 }
  31
  32 debug() {
  33         [ -n "$VCSH_DEBUG" ] && echo "$SELF: debug: $@"
  34 }
  35
  36 verbose() {
  37         if [ -n "$VCSH_DEBUG" ] || [ -n "$VCSH_VERBOSE" ]; then echo "$SELF: verbose: $@"; fi
  38 }
  39
  40 use() {
  41         verbose "use() begin"
  42         if [ ! -d "$GIT_DIR" ]; then
  43                 echo E: no repository found for "$VCSH_REPO_NAME" >&2
  44                 return 1
  45         fi
  46         export GIT_DIR
  47         export GIT_WORK_TREE="$(git config --get core.worktree)"
  48         export VCSH_DIRECTORY="$VCSH_REPO_NAME"
  49         verbose "use() end"
  50 }
  51
  52 init() {
  53         verbose "init() begin"
  54         [ -e "$GIT_DIR" ] &&
  55                 echo "$SELF: fatal: $GIT_DIR exists" &&
  56                 return 21
  57         export GIT_WORK_TREE="$HOME"
  58         mkdir -p "$GIT_WORK_TREE"
  59         cd "$GIT_WORK_TREE" ||
  60                 (echo "$SELF: fatal: could not enter $GIT_WORK_TREE" &&
  61                  exit 20) || exit 20
  62         cd "$GIT_WORK_TREE"
  63         git init
  64         git config core.worktree     "$GIT_WORK_TREE"
  65         git config core.excludesfile ".gitignore.d/$REPO_NAME"
  66         touch   "$HOME/.gitignore.d/$REPO_NAME"
  67         git add "$HOME/.gitignore.d/$REPO_NAME"
  68         verbose "init() end"
  69 }
  70
  71 leave() {
  72         unset GIT_DIR
  73         unset GIT_WORK_TREE
  74         unset VCSH_DIRECTORY
  75 }
  76
  77
  78 if [ "$1" = 'clone' ]; then
  79         GIT_REMOTE="$2"
  80         export GIT_REMOTE
  81         VCSH_REPO_NAME="$3"
  82         [ -z "$VCSH_REPO_NAME" ] && VCSH_REPO_NAME=$(basename "$GIT_REMOTE" .git)
  83         export VCSH_REPO_NAME
  84         export GIT_DIR="$VCSH_BASE/$VCSH_REPO_NAME.git"
  85 elif [ "$1" = 'delete' ] ||
  86      [ "$1" = 'init' ] ||
  87      [ "$1" = 'run' ] ||
  88      [ "$1" = 'seed-gitignore' ]; then
  89         [ -z $2 ] && echo "$SELF $1: error: please specify repository to work on" && return 1
  90         [ -z $3 ] && echo "$SELF $1 $2: error: please specify a command" && return 1
  91         export VCSH_COMMAND="$1"
  92         export VCSH_REPO_NAME="$2"
  93         export GIT_DIR="$VCSH_BASE/$VCSH_REPO_NAME.git"
  94         shift 2
  95         export VCSH_EXTERNAL_COMMAND="$*"
  96 elif [ "$1" = 'help' ] ||
  97      [ "$1" = 'list' ]; then
  98         export VCSH_COMMAND="$1"
  99 else
 100         [ -z $1 ] && help && return 0
 101         export VCSH_COMMAND='run'
 102         export VCSH_REPO_NAME="$1"
 103         export GIT_DIR="$VCSH_BASE/$VCSH_REPO_NAME.git"
 104         [ -d $GIT_DIR ] || (help && return 1) || return 0
 105         shift 1
 106         export VCSH_EXTERNAL_COMMAND="git $*"
 107 fi
 108
 109
 110 for check_directory in "$VCSH_BASE" "$HOME/.gitignore.d"
 111 do
 112         if [ ! -d "$check_directory" ]; then
 113                 if [ -e "$check_directory" ]; then
 114                         echo "$SELF: error: $check_directory exists but is not a directory" >&2
 115                         exit 2
 116                 else
 117                         echo "$SELF: info: attempting to create $check_directory"
 118                         mkdir -p "$check_directory" || (echo "$SELF: error: could not create $check_directory" >&2; exit 2)
 119                 fi
 120         fi
 121 done
 122
 123
 124 if [ "$VCSH_COMMAND" = 'clone' ]; then
 125         verbose "clone begin"
 126         init
 127         git remote add origin "$GIT_REMOTE"
 128         git config branch.master.remote origin
 129         git config branch.master.merge  refs/heads/master
 130         git fetch
 131         for object in $(git ls-tree -r origin/master | awk '{print $4}'); do
 132                 [ -e "$object" ] &&
 133                         echo "$SELF: error: $object exists." &&
 134                         VCSH_CONFLICT=1;
 135         done
 136         [ "$VCSH_CONFLICT" = '1' ] &&
 137                 echo "$SELF: fatal: will stop after fetching and not try to merge!\n" &&
 138                 echo "  Once this situation has been resolved, run 'vcsh run <foo> git pull' to finish cloning.\n" &&
 139                 exit 3
 140         git merge origin/master
 141 #       use || return 1
 142         verbose "clone end"
 143
 144 elif [ "$VCSH_COMMAND" = 'help' ] || [ "$#" -eq 0 ]; then
 145         help
 146
 147 elif [ "$VCSH_COMMAND" = 'delete' ]; then
 148         verbose "delete begin"
 149         old_dir="$PWD"
 150         cd "$HOME"
 151         use || return 1
 152         echo "$SELF: info: This operation WILL DETROY DATA!"
 153         files=$(git ls-files)
 154         echo "These files will be deleted:
 155
 156 $files
 157
 158 AGAIN, THIS WILL DELETE YOUR DATA!
 159 To continue, type \"Yes, do as I say\""
 160         read answer
 161         [ "x$answer" = "xYes, do as I say" ] || exit
 162         for file in $files; do
 163                 rm -f $file || echo "$SELF: info: could not delete '$file', continuing with deletion"
 164         done
 165         rm -rf "$GIT_DIR" || echo "$SELF: info: could not delete '$GIT_DIR'"
 166         cd "$old_dir"
 167         verbose "delete end"
 168
 169 #elif [ "$VCSH_COMMAND" = 'exit' ]; then
 170 #       verbose "exit begin"
 171 #       if [ -n "$ZSH_VERSION" ] && [ "$VCSH_NO_IGNORE_EOF" = '1' ]; then
 172 #               unset VCSH_NO_IGNORE_EOF
 173 #               setopt NO_IGNORE_EOF
 174 #       fi
 175 #       leave
 176 #       [ -n "$ZSH_VERSION" ] && [ "$USER" = richih ] && buildPS1
 177 #       verbose "exit end"
 178 #       exit 0
 179
 180 elif [ "$VCSH_COMMAND" = 'init' ]; then
 181         verbose "init begin"
 182         init
 183 #       use || return 1
 184         verbose "init end"
 185
 186 elif [ "$VCSH_COMMAND" = 'list' ]; then
 187         verbose "list begin"
 188         for i in "$VCSH_BASE"/*.git; do
 189                 echo $(basename "$i" .git)
 190         done
 191         verbose "list end"
 192
 193 elif [ "$VCSH_COMMAND" = 'run' ]; then
 194         verbose "run begin"
 195         use || return 1
 196         $VCSH_EXTERNAL_COMMAND
 197         leave
 198         verbose "run end"
 199
 200 elif [ "$VCSH_COMMAND" = 'seed-gitignore' ]; then
 201         verbose "seed-gitignore begin"
 202         use || return 1
 203         # Switching directory as this has to be executed from $HOME to be of any use.
 204         # Going back into old directory at the end in case `vcsh use` is reactivated.
 205         old_dir="$PWD"
 206         cd "$HOME"
 207         git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
 208         gitignores=$(for file in $(git ls-files); do
 209                 while true; do
 210                         echo $file; new="${file%/*}"
 211                         [ "$file" = "$new" ] && break
 212                         file="$new"
 213                 done;
 214         done | sort -u | sed 's/^/!/')
 215         tempfile=$(mktemp) ||
 216                 (echo "$SELF: fatal: could not create tempfile" && exit 1)
 217         echo '*' > "$tempfile"
 218         for gitignore in $gitignores; do
 219                 echo "$gitignore" >> "$tempfile"
 220         done
 221         diff -N "$tempfile" "$HOME/.gitignore.d/$2" > /dev/null &&
 222                 rm -f "$tempfile" &&
 223                 return
 224         if [ -e "$HOME/.gitignore.d/$2" ]; then
 225                 echo "$SELF: info: $HOME/.gitignore.d/$2 differs from new data, moving it to $HOME/.gitignore.d/$2.bak"
 226                 mv -f "$HOME/.gitignore.d/$2" "$HOME/.gitignore.d/$2.bak" ||
 227                         (echo "$SELF: fatal: could not move $HOME/.gitignore.d/$2 to $HOME/.gitignore.d/$2.bak" && exit 1)
 228         fi
 229         mv -f "$tempfile" "$HOME/.gitignore.d/$2" ||
 230                 (echo "$SELF: fatal: could not move $tempfile to $HOME/.gitignore.d/$2" && exit 1)
 231         cd "$old_dir"
 232         verbose "seed-gitignore end"
 233
 234 #elif [ "$VCSH_COMMAND" = 'use' ]; then
 235 #       verbose "use begin"
 236 #       if [ -n "$ZSH_VERSION" ]; then
 237 #               if [ -o NO_IGNORE_EOF ]; then
 238 #                       export VCSH_NO_IGNORE_EOF=1
 239 #                       setopt IGNORE_EOF
 240 #               fi
 241 #               vcsh_exit() {
 242 #                       vcsh exit;
 243 #                       zle reset-prompt;
 244 #               }
 245 #               zle -N vcsh_exit
 246 #               bindkey '^d' 'vcsh_exit'
 247 #       fi
 248 #       use || return 1
 249 #       [ -n "$ZSH_VERSION" ] && [ "$USER" = richih ] && buildPS1
 250 #       verbose "use end"
 251
 252 else
 253         verbose "defaulting to calling help()"
 254         help
 255         echo "$SELF: fatal: You should never reach this code. File a bug, please."
 256         exit 99
 257
 258 fi