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 $0)
   8 if [ "$SELF" = 'bash' ] ||
   9    [ "$SELF" = 'dash' ] ||
  10    [ "$SELF" = 'sh' ] ||
  11    [ "$SELF" = 'zsh' ]; then
  12         SELF='vcsh'
  13         VCSH_SOURCED=1
  14 fi
  15
  16
  17 help() {
  18         echo "usage: $SELF <args>
  19
  20    clone <remote> \\
  21          [<repo>]       Clone from an existing repository
  22    help                 Display this help text
  23    delete               Delete an existing repository
  24    enter                Enter repository; spawn new $SHELL
  25    exit                 Exit repository; unset ENV
  26    init <repo>          Initialize a new repository
  27    list                 List all repositories
  28    run <repo> \\
  29        <command>        Use this repository
  30
  31    seed-gitignore \\
  32    <repo>               Seed .gitignore.d/<repo> from git ls-files
  33    setup                Set up repository with recommended settings
  34    use <repo>           Use repository; set ENV
  35
  36    <repo> <git command> Special command that allows you to run git commands
  37                         directly without having to type so much ;)" >&2
  38 }
  39
  40 debug() {
  41         [ -n "$VCSH_DEBUG" ] && echo "$SELF: debug: $@"
  42 }
  43
  44 verbose() {
  45         if [ -n "$VCSH_DEBUG" ] || [ -n "$VCSH_VERBOSE" ]; then echo "$SELF: verbose: $@"; fi
  46 }
  47
  48 setup() {
  49         git config core.worktree     "$GIT_WORK_TREE"
  50         git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
  51         git config vcsh.vcsh         'true'
  52         touch   "$HOME/.gitignore.d/$VCSH_REPO_NAME"
  53         git add "$HOME/.gitignore.d/$VCSH_REPO_NAME"
  54 }
  55
  56 init() {
  57         verbose "init() begin"
  58         [ -e "$GIT_DIR" ] &&
  59                 echo "$SELF: fatal: $GIT_DIR exists" &&
  60                 return 21
  61         export GIT_WORK_TREE="$HOME"
  62         mkdir -p "$GIT_WORK_TREE"
  63         cd "$GIT_WORK_TREE" ||
  64                 (echo "$SELF: fatal: could not enter $GIT_WORK_TREE" &&
  65                  return 1) || return $?
  66         cd "$GIT_WORK_TREE"
  67         git init
  68         setup
  69         verbose "init() end"
  70 }
  71
  72 leave() {
  73         unset GIT_DIR
  74         unset GIT_WORK_TREE
  75         unset VCSH_DIRECTORY
  76 }
  77
  78 use() {
  79         verbose "use() begin"
  80         if [ ! -d "$GIT_DIR" ]; then
  81                 echo E: no repository found for "$VCSH_REPO_NAME" >&2
  82                 return 1
  83         fi
  84         export GIT_DIR
  85         export GIT_WORK_TREE="$(git config --get core.worktree)"
  86         export VCSH_DIRECTORY="$VCSH_REPO_NAME"
  87         verbose "use() end"
  88 }
  89
  90
  91 if [ "$1" = 'clone' ]; then
  92         export VCSH_COMMAND="$1"
  93         GIT_REMOTE="$2"
  94         export GIT_REMOTE
  95         VCSH_REPO_NAME="$3"
  96         [ -z "$VCSH_REPO_NAME" ] && VCSH_REPO_NAME=$(basename "$GIT_REMOTE" .git)
  97         export VCSH_REPO_NAME
  98         export GIT_DIR="$VCSH_BASE/$VCSH_REPO_NAME.git"
  99 elif [ "$1" = 'delete' ] ||
 100      [ "$1" = 'enter' ] ||
 101      [ "$1" = 'init' ] ||
 102      [ "$1" = 'run' ] ||
 103      [ "$1" = 'seed-gitignore' ] ||
 104      [ "$1" = 'setup' ] ||
 105      [ "$1" = 'use' ]; then
 106         [ -z $2 ] && echo "$SELF $1: error: please specify repository to work on" && return 1
 107         export VCSH_COMMAND="$1"
 108         export VCSH_REPO_NAME="$2"
 109         export GIT_DIR="$VCSH_BASE/$VCSH_REPO_NAME.git"
 110         shift 2
 111         export VCSH_EXTERNAL_COMMAND="$*"
 112         if [ "$VCSH_COMMAND" = 'run' ]; then
 113                 [ -z "$VCSH_EXTERNAL_COMMAND" ] && echo "$SELF $1 $2: error: please specify a command" && return 1
 114         fi
 115 elif [ "$1" = 'exit' ] ||
 116      [ "$1" = 'help' ] ||
 117      [ "$1" = 'list' ]; then
 118         export VCSH_COMMAND="$1"
 119 else
 120         [ -z $1 ] && help && return 0
 121         export VCSH_COMMAND='run'
 122         export VCSH_REPO_NAME="$1"
 123         export GIT_DIR="$VCSH_BASE/$VCSH_REPO_NAME.git"
 124         [ -d $GIT_DIR ] || (help && return 1) || return 0
 125         shift 1
 126         export VCSH_EXTERNAL_COMMAND="git $*"
 127 fi
 128
 129
 130 for check_directory in "$VCSH_BASE" "$HOME/.gitignore.d"
 131 do
 132         if [ ! -d "$check_directory" ]; then
 133                 if [ -e "$check_directory" ]; then
 134                         echo "$SELF: error: $check_directory exists but is not a directory" >&2
 135                         return 2
 136                 else
 137                         echo "$SELF: info: attempting to create $check_directory"
 138                         mkdir -p "$check_directory" || (echo "$SELF: error: could not create $check_directory" >&2; return 2) || return $?
 139                 fi
 140         fi
 141 done
 142
 143
 144 if [ "$VCSH_COMMAND" = 'clone' ]; then
 145         verbose "clone begin"
 146         init
 147         git remote add origin "$GIT_REMOTE"
 148         git config branch.master.remote origin
 149         git config branch.master.merge  refs/heads/master
 150         git fetch
 151         for object in $(git ls-tree -r origin/master | awk '{print $4}'); do
 152                 [ -e "$object" ] &&
 153                         echo "$SELF: error: $object exists." &&
 154                         VCSH_CONFLICT=1;
 155         done
 156         [ "$VCSH_CONFLICT" = '1' ] &&
 157                 echo "$SELF: fatal: will stop after fetching and not try to merge!\n" &&
 158                 echo "  Once this situation has been resolved, run 'vcsh run <foo> git pull' to finish cloning.\n" &&
 159                 return 3
 160         git merge origin/master
 161 #       use || return $?
 162         verbose "clone end"
 163
 164 #elif [ "$VCSH_COMMAND" = 'help' ] || [ "$#" -eq 0 ]; then
 165 elif [ "$VCSH_COMMAND" = 'help' ]; then
 166         help
 167
 168 elif [ "$VCSH_COMMAND" = 'delete' ]; then
 169         verbose "delete begin"
 170         old_dir="$PWD"
 171         cd "$HOME"
 172         use || return $?
 173         echo "$SELF: info: This operation WILL DETROY DATA!"
 174         files=$(git ls-files)
 175         echo "These files will be deleted:
 176
 177 $files
 178
 179 AGAIN, THIS WILL DELETE YOUR DATA!
 180 To continue, type \"Yes, do as I say\""
 181         read answer
 182         [ "x$answer" = "xYes, do as I say" ] || return 1
 183         for file in $files; do
 184                 rm -f $file || echo "$SELF: info: could not delete '$file', continuing with deletion"
 185         done
 186         rm -rf "$GIT_DIR" || echo "$SELF: info: could not delete '$GIT_DIR'"
 187         cd "$old_dir"
 188         verbose "delete end"
 189
 190 elif [ "$VCSH_COMMAND" = 'enter' ]; then
 191         verbose "enter begin"
 192         use || return $?
 193         $SHELL
 194         leave
 195         verbose "enter end"
 196
 197 elif [ "$VCSH_COMMAND" = 'exit' ]; then
 198         verbose "exit begin"
 199 #       if [ -n "$ZSH_VERSION" ] && [ "$VCSH_NO_IGNORE_EOF" = '1' ]; then
 200 #               unset VCSH_NO_IGNORE_EOF
 201 #               setopt NO_IGNORE_EOF
 202 #       fi
 203         [ -z "$VCSH_SOURCED" ] && echo "$SELF $VCSH_COMMAND: You need to source vcsh if you want to run in this mode" && return 10
 204         leave
 205 #       [ -n "$ZSH_VERSION" ] && [ "$USER" = richih ] && buildPS1
 206         verbose "exit end"
 207         return 0
 208
 209 elif [ "$VCSH_COMMAND" = 'init' ]; then
 210         verbose "init begin"
 211         init
 212 #       use || return $?
 213         verbose "init end"
 214
 215 elif [ "$VCSH_COMMAND" = 'list' ]; then
 216         verbose "list begin"
 217         for i in "$VCSH_BASE"/*.git; do
 218                 echo $(basename "$i" .git)
 219         done
 220         verbose "list end"
 221
 222 elif [ "$VCSH_COMMAND" = 'run' ]; then
 223         verbose "run begin"
 224         use || return $?
 225         $VCSH_EXTERNAL_COMMAND
 226         leave
 227         verbose "run end"
 228
 229 elif [ "$VCSH_COMMAND" = 'seed-gitignore' ]; then
 230         verbose "seed-gitignore begin"
 231         use || return $?
 232         # Switching directory as this has to be executed from $HOME to be of any use.
 233         # Going back into old directory at the end in case `vcsh use` is reactivated.
 234         old_dir="$PWD"
 235         cd "$HOME"
 236         gitignores=$(for file in $(git ls-files); do
 237                 while true; do
 238                         echo $file; new="${file%/*}"
 239                         [ "$file" = "$new" ] && break
 240                         file="$new"
 241                 done;
 242         done | sort -u)
 243         tempfile=$(mktemp) ||
 244                 (echo "$SELF: fatal: could not create tempfile" && return 1) || return $?
 245         echo '*' > "$tempfile"
 246         for gitignore in $gitignores; do
 247                 echo "$gitignore" | sed 's/^/!/' >> "$tempfile"
 248                 [ -d "$gitignore" ] && echo "$gitignore/*" | sed 's/^/!/'>> "$tempfile"
 249         done
 250         diff -N "$tempfile" "$HOME/.gitignore.d/$VCSH_REPO_NAME" > /dev/null &&
 251                 rm -f "$tempfile" &&
 252                 return
 253         if [ -e "$HOME/.gitignore.d/$VCSH_REPO_NAME" ]; then
 254                 echo "$SELF: info: $HOME/.gitignore.d/$VCSH_REPO_NAME differs from new data, moving it to $HOME/.gitignore.d/$VCSH_REPO_NAME.bak"
 255                 mv -f "$HOME/.gitignore.d/$VCSH_REPO_NAME" "$HOME/.gitignore.d/$VCSH_REPO_NAME.bak" ||
 256                         (echo "$SELF: fatal: could not move $HOME/.gitignore.d/$VCSH_REPO_NAME to $HOME/.gitignore.d/$VCSH_REPO_NAME.bak" &&
 257                          return 1) || return $?
 258         fi
 259         mv -f "$tempfile" "$HOME/.gitignore.d/$VCSH_REPO_NAME" ||
 260                 (echo "$SELF: fatal: could not move $tempfile to $HOME/.gitignore.d/$VCSH_REPO_NAME" && return 1) || return $?
 261         cd "$old_dir"
 262         verbose "seed-gitignore end"
 263
 264 elif [ "$VCSH_COMMAND" = 'setup' ]; then
 265         verbose "seed-gitignore begin"
 266         use   || return $?
 267         setup || return $?
 268         leave
 269         verbose "seed-gitignore end"
 270
 271 elif [ "$VCSH_COMMAND" = 'use' ]; then
 272         verbose "use begin"
 273 #       if [ -n "$ZSH_VERSION" ]; then
 274 #               if [ -o NO_IGNORE_EOF ]; then
 275 #                       export VCSH_NO_IGNORE_EOF=1
 276 #                       setopt IGNORE_EOF
 277 #               fi
 278 #               vcsh_exit() {
 279 #                       vcsh exit;
 280 #                       zle reset-prompt;
 281 #               }
 282 #               zle -N vcsh_exit
 283 #               bindkey '^d' 'vcsh_exit'
 284 #       fi
 285         [ -z "$VCSH_SOURCED" ] && echo "$SELF $VCSH_COMMAND: You need to source vcsh if you want to run in this mode" && return 10
 286         use || return $?
 287 #       [ -n "$ZSH_VERSION" ] && [ "$USER" = richih ] && buildPS1
 288         verbose "use end"
 289
 290 else
 291         verbose "defaulting to calling help()"
 292         help
 293         echo "$SELF: fatal: You should never reach this code. File a bug, please."
 294         return 99
 295
 296 fi