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: $SELF <args>
  12
  13    clone <remote> \\
  14          [<repo>]       Clone from an existing repository
  15    help                 Display this help text
  16    delete               Delete an existing repository
  17    exit                 Exit repository; unset ENV
  18    init <repo>          Initialize a new repository
  19    list                 List all repositories
  20    run <repo> \\
  21        <command>        Use this repository
  22
  23    seed-gitignore \\
  24    <repo>               Seed .gitignore.d/<repo> from git ls-files
  25    use <repo>           Use repository; set ENV
  26
  27    <repo> <git command> Special command that allows you to run git commands
  28                         directly without having to type so much ;)" >&2
  29 }
  30
  31 debug() {
  32         [ -n "$VCSH_DEBUG" ] && echo "$SELF: debug: $@"
  33 }
  34
  35 verbose() {
  36         if [ -n "$VCSH_DEBUG" ] || [ -n "$VCSH_VERBOSE" ]; then echo "$SELF: verbose: $@"; fi
  37 }
  38
  39 use() {
  40         verbose "use() begin"
  41         if [ ! -d "$GIT_DIR" ]; then
  42                 echo E: no repository found for "$VCSH_REPO_NAME" >&2
  43                 return 1
  44         fi
  45         export GIT_DIR
  46         export GIT_WORK_TREE="$(git config --get core.worktree)"
  47         export VCSH_DIRECTORY="$VCSH_REPO_NAME"
  48         verbose "use() end"
  49 }
  50
  51 init() {
  52         verbose "init() begin"
  53         [ -e "$GIT_DIR" ] &&
  54                 echo "$SELF: fatal: $GIT_DIR exists" &&
  55                 return 21
  56         export GIT_WORK_TREE="$HOME"
  57         mkdir -p "$GIT_WORK_TREE"
  58         cd "$GIT_WORK_TREE" ||
  59                 (echo "$SELF: fatal: could not enter $GIT_WORK_TREE" &&
  60                  return 1) || return $?
  61         cd "$GIT_WORK_TREE"
  62         git init
  63         git config core.worktree     "$GIT_WORK_TREE"
  64         git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
  65         touch   "$HOME/.gitignore.d/$VCSH_REPO_NAME"
  66         git add "$HOME/.gitignore.d/$VCSH_REPO_NAME"
  67         verbose "init() end"
  68 }
  69
  70 leave() {
  71         unset GIT_DIR
  72         unset GIT_WORK_TREE
  73         unset VCSH_DIRECTORY
  74 }
  75
  76
  77 if [ "$1" = 'clone' ]; then
  78         GIT_REMOTE="$2"
  79         export GIT_REMOTE
  80         VCSH_REPO_NAME="$3"
  81         [ -z "$VCSH_REPO_NAME" ] && VCSH_REPO_NAME=$(basename "$GIT_REMOTE" .git)
  82         export VCSH_REPO_NAME
  83         export GIT_DIR="$VCSH_BASE/$VCSH_REPO_NAME.git"
  84 elif [ "$1" = 'delete' ] ||
  85      [ "$1" = 'init' ] ||
  86      [ "$1" = 'run' ] ||
  87      [ "$1" = 'seed-gitignore' ] ||
  88      [ "$1" = 'use' ]; then
  89         [ -z $2 ] && echo "$SELF $1: error: please specify repository to work on" && return 1
  90         export VCSH_COMMAND="$1"
  91         export VCSH_REPO_NAME="$2"
  92         export GIT_DIR="$VCSH_BASE/$VCSH_REPO_NAME.git"
  93         shift 2
  94         export VCSH_EXTERNAL_COMMAND="$*"
  95         if [ "$VCSH_COMMAND" = 'run' ]; then
  96                 [ -z "$VCSH_EXTERNAL_COMMAND" ] && echo "$SELF $1 $2: error: please specify a command" && return 1
  97         fi
  98 elif [ "$1" = 'exit' ] ||
  99      [ "$1" = 'help' ] ||
 100      [ "$1" = 'list' ]; then
 101         export VCSH_COMMAND="$1"
 102 else
 103         [ -z $1 ] && help && return 0
 104         export VCSH_COMMAND='run'
 105         export VCSH_REPO_NAME="$1"
 106         export GIT_DIR="$VCSH_BASE/$VCSH_REPO_NAME.git"
 107         [ -d $GIT_DIR ] || (help && return 1) || return 0
 108         shift 1
 109         export VCSH_EXTERNAL_COMMAND="git $*"
 110 fi
 111
 112
 113 for check_directory in "$VCSH_BASE" "$HOME/.gitignore.d"
 114 do
 115         if [ ! -d "$check_directory" ]; then
 116                 if [ -e "$check_directory" ]; then
 117                         echo "$SELF: error: $check_directory exists but is not a directory" >&2
 118                         return 2
 119                 else
 120                         echo "$SELF: info: attempting to create $check_directory"
 121                         mkdir -p "$check_directory" || (echo "$SELF: error: could not create $check_directory" >&2; return 2) || return $?
 122                 fi
 123         fi
 124 done
 125
 126
 127 if [ "$VCSH_COMMAND" = 'clone' ]; then
 128         verbose "clone begin"
 129         init
 130         git remote add origin "$GIT_REMOTE"
 131         git config branch.master.remote origin
 132         git config branch.master.merge  refs/heads/master
 133         git fetch
 134         for object in $(git ls-tree -r origin/master | awk '{print $4}'); do
 135                 [ -e "$object" ] &&
 136                         echo "$SELF: error: $object exists." &&
 137                         VCSH_CONFLICT=1;
 138         done
 139         [ "$VCSH_CONFLICT" = '1' ] &&
 140                 echo "$SELF: fatal: will stop after fetching and not try to merge!\n" &&
 141                 echo "  Once this situation has been resolved, run 'vcsh run <foo> git pull' to finish cloning.\n" &&
 142                 return 3
 143         git merge origin/master
 144 #       use || return $?
 145         verbose "clone end"
 146
 147 #elif [ "$VCSH_COMMAND" = 'help' ] || [ "$#" -eq 0 ]; then
 148 elif [ "$VCSH_COMMAND" = 'help' ]; then
 149         help
 150
 151 elif [ "$VCSH_COMMAND" = 'delete' ]; then
 152         verbose "delete begin"
 153         old_dir="$PWD"
 154         cd "$HOME"
 155         use || return $?
 156         echo "$SELF: info: This operation WILL DETROY DATA!"
 157         files=$(git ls-files)
 158         echo "These files will be deleted:
 159
 160 $files
 161
 162 AGAIN, THIS WILL DELETE YOUR DATA!
 163 To continue, type \"Yes, do as I say\""
 164         read answer
 165         [ "x$answer" = "xYes, do as I say" ] || return 1
 166         for file in $files; do
 167                 rm -f $file || echo "$SELF: info: could not delete '$file', continuing with deletion"
 168         done
 169         rm -rf "$GIT_DIR" || echo "$SELF: info: could not delete '$GIT_DIR'"
 170         cd "$old_dir"
 171         verbose "delete end"
 172
 173 elif [ "$VCSH_COMMAND" = 'exit' ]; then
 174         verbose "exit begin"
 175 #       if [ -n "$ZSH_VERSION" ] && [ "$VCSH_NO_IGNORE_EOF" = '1' ]; then
 176 #               unset VCSH_NO_IGNORE_EOF
 177 #               setopt NO_IGNORE_EOF
 178 #       fi
 179         leave
 180 #       [ -n "$ZSH_VERSION" ] && [ "$USER" = richih ] && buildPS1
 181         verbose "exit end"
 182         return 0
 183
 184 elif [ "$VCSH_COMMAND" = 'init' ]; then
 185         verbose "init begin"
 186         init
 187 #       use || return $?
 188         verbose "init end"
 189
 190 elif [ "$VCSH_COMMAND" = 'list' ]; then
 191         verbose "list begin"
 192         for i in "$VCSH_BASE"/*.git; do
 193                 echo $(basename "$i" .git)
 194         done
 195         verbose "list end"
 196
 197 elif [ "$VCSH_COMMAND" = 'run' ]; then
 198         verbose "run begin"
 199         use || return $?
 200         $VCSH_EXTERNAL_COMMAND
 201         leave
 202         verbose "run end"
 203
 204 elif [ "$VCSH_COMMAND" = 'seed-gitignore' ]; then
 205         verbose "seed-gitignore begin"
 206         use || return $?
 207         # Switching directory as this has to be executed from $HOME to be of any use.
 208         # Going back into old directory at the end in case `vcsh use` is reactivated.
 209         old_dir="$PWD"
 210         cd "$HOME"
 211         git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
 212         gitignores=$(for file in $(git ls-files); do
 213                 while true; do
 214                         echo $file; new="${file%/*}"
 215                         [ "$file" = "$new" ] && break
 216                         file="$new"
 217                 done;
 218         done | sort -u)
 219         tempfile=$(mktemp) ||
 220                 (echo "$SELF: fatal: could not create tempfile" && return 1) || return $?
 221         echo '*' > "$tempfile"
 222         for gitignore in $gitignores; do
 223                 echo "$gitignore" | sed 's/^/!/' >> "$tempfile"
 224                 [ -d "$gitignore" ] && echo "$gitignore/*" | sed 's/^/!/'>> "$tempfile"
 225         done
 226         diff -N "$tempfile" "$HOME/.gitignore.d/$VCSH_REPO_NAME" > /dev/null &&
 227                 rm -f "$tempfile" &&
 228                 return
 229         if [ -e "$HOME/.gitignore.d/$VCSH_REPO_NAME" ]; then
 230                 echo "$SELF: info: $HOME/.gitignore.d/$VCSH_REPO_NAME differs from new data, moving it to $HOME/.gitignore.d/$VCSH_REPO_NAME.bak"
 231                 mv -f "$HOME/.gitignore.d/$VCSH_REPO_NAME" "$HOME/.gitignore.d/$VCSH_REPO_NAME.bak" ||
 232                         (echo "$SELF: fatal: could not move $HOME/.gitignore.d/$VCSH_REPO_NAME to $HOME/.gitignore.d/$VCSH_REPO_NAME.bak" &&
 233                          return 1) || return $?
 234         fi
 235         mv -f "$tempfile" "$HOME/.gitignore.d/$VCSH_REPO_NAME" ||
 236                 (echo "$SELF: fatal: could not move $tempfile to $HOME/.gitignore.d/$VCSH_REPO_NAME" && return 1) || return $?
 237         cd "$old_dir"
 238         verbose "seed-gitignore end"
 239
 240 elif [ "$VCSH_COMMAND" = 'use' ]; then
 241         verbose "use begin"
 242 #       if [ -n "$ZSH_VERSION" ]; then
 243 #               if [ -o NO_IGNORE_EOF ]; then
 244 #                       export VCSH_NO_IGNORE_EOF=1
 245 #                       setopt IGNORE_EOF
 246 #               fi
 247 #               vcsh_exit() {
 248 #                       vcsh exit;
 249 #                       zle reset-prompt;
 250 #               }
 251 #               zle -N vcsh_exit
 252 #               bindkey '^d' 'vcsh_exit'
 253 #       fi
 254         use || return $?
 255 #       [ -n "$ZSH_VERSION" ] && [ "$USER" = richih ] && buildPS1
 256         verbose "use end"
 257
 258 else
 259         verbose "defaulting to calling help()"
 260         help
 261         echo "$SELF: fatal: You should never reach this code. File a bug, please."
 262         return 99
 263
 264 fi