vcsh

   1 #!/bin/sh
   2
   3 [ -n "$VCSH_DEBUG" ] && set -x
   4
   5 SELF=$(basename $0)
   6
   7 [ -z "$XDG_CONFIG_HOME" ] && XDG_CONFIG_HOME="$HOME/.config"
   8 [ -z "$VCSH_BASE" ]       && VCSH_BASE="$XDG_CONFIG_HOME/vcsh/repo.d"
   9 for check_directory in "$VCSH_BASE" "$HOME/.gitignore.d"
  10 do
  11         if [ ! -d "$check_directory" ]; then
  12                 if [ -e "$check_directory" ]; then
  13                         echo "$SELF: error: $check_directory exists but is not a directory" >&2
  14                         exit 2
  15                 else
  16                         echo "$SELF: info: attempting to create $check_directory"
  17                         mkdir -p "$check_directory" || (echo "$SELF: error: could not create $check_directory" >&2; exit 2)
  18                 fi
  19         fi
  20 done
  21
  22 debug() {
  23         [ -n "$VCSH_DEBUG" ] && echo "$SELF: debug: $1"
  24 }
  25
  26 verbose() {
  27         if [ -n "$VCSH_DEBUG" ] || [ -n "$VCSH_VERBOSE" ]; then echo "$SELF: verbose: $1"; fi
  28 }
  29
  30 #   use <repo>     Use this repository
  31 #
  32 #   exit              Exit vcsh mode" >&2
  33 help() {
  34         echo "usage: $SELF <args>
  35
  36    clone <remote> \\
  37          [<repo>]    Clone from an existing repository
  38    help              Display this help
  39    delete            Delete an existing repository
  40    init <repo>       Initialize a new repository
  41    list              List all repos
  42    run <repo> \\
  43        <command>     Use this repository
  44
  45    seed-gitignore \\
  46    <repo>            Seed .gitignore.d/<repo> from git ls-files" >&2
  47 }
  48
  49 use() {
  50         verbose "use() begin"
  51         REPO_NAME="$1"
  52         GIT_DIR="$VCSH_BASE/$REPO_NAME.git"
  53
  54         if [ ! -d "$GIT_DIR" ]; then
  55                 echo E: no repository found for "$REPO_NAME" >&2
  56                 return 1
  57         fi
  58
  59         export GIT_DIR
  60         export GIT_WORK_TREE="$(git config --get core.worktree)"
  61         export VCSH_DIRECTORY="$REPO_NAME"
  62         verbose "use() end"
  63 }
  64
  65 init() {
  66         verbose "init() begin"
  67         [ -e "$GIT_DIR" ] &&
  68                 echo "$SELF: fatal: $GIT_DIR exists" &&
  69                 return 21
  70         export GIT_WORK_TREE="$HOME"
  71         mkdir -p "$GIT_WORK_TREE"
  72         cd "$GIT_WORK_TREE" ||
  73                 (echo "$SELF: fatal: could not enter $GIT_WORK_TREE" &&
  74                  exit 20) || exit 20
  75         cd "$GIT_WORK_TREE"
  76         git init
  77         git config core.worktree     "$GIT_WORK_TREE"
  78         git config core.excludesfile ".gitignore.d/$REPO_NAME"
  79         touch   "$HOME/.gitignore.d/$REPO_NAME"
  80         git add "$HOME/.gitignore.d/$REPO_NAME"
  81         verbose "init() end"
  82 }
  83
  84 leave() {
  85         unset GIT_DIR
  86         unset GIT_WORK_TREE
  87         unset VCSH_DIRECTORY
  88 }
  89
  90 if [ "$1" = 'help' ] || [ "$#" -eq 0 ]; then
  91         help
  92         [ "$1" = 'help' ]
  93         exit $?
  94
  95 elif [ "$1" = 'list' ]; then
  96         verbose "list begin"
  97         for i in "$VCSH_BASE"/*.git; do
  98                 echo $(basename "$i" .git)
  99         done
 100         verbose "list end"
 101         exit 0
 102
 103 elif [ "$1" = 'run' ]; then
 104         verbose "run begin"
 105         use "$2" || return 1
 106         shift 2
 107         "$@"
 108         leave
 109         verbose "run end"
 110         exit 0
 111
 112 #elif [ "$1" = 'use' ]; then
 113 #       verbose "use begin"
 114 #       if [ -n "$ZSH_VERSION" ]; then
 115 #               if [ -o NO_IGNORE_EOF ]; then
 116 #                       export VCSH_NO_IGNORE_EOF=1
 117 #                       setopt IGNORE_EOF
 118 #               fi
 119 #               vcsh_exit() {
 120 #                       vcsh exit;
 121 #                       zle reset-prompt;
 122 #               }
 123 #               zle -N vcsh_exit
 124 #               bindkey '^d' 'vcsh_exit'
 125 #       fi
 126 #       use "$2" || return 1
 127 #       [ -n "$ZSH_VERSION" ] && [ "$USER" = richih ] && buildPS1
 128 #       verbose "use end"
 129 #       exit 0
 130
 131 elif [ "$1" = 'clone' ]; then
 132         verbose "clone begin"
 133         GIT_REMOTE="$2"
 134         REPO_NAME="$3"
 135         [ -z "$REPO_NAME" ] && REPO_NAME=$(basename "$GIT_REMOTE" .git)
 136         export REPO_NAME
 137         export GIT_DIR="$VCSH_BASE/$REPO_NAME.git"
 138         init
 139
 140         git remote add origin "$GIT_REMOTE"
 141         git config branch.master.remote origin
 142         git config branch.master.merge  refs/heads/master
 143         git config core.excludesfile    ".gitignore.d/$REPO_NAME"
 144         git fetch
 145         for object in $(git ls-tree -r origin/master | awk '{print $4}'); do
 146                 [ -e "$object" ] &&
 147                         echo "$SELF: error: $object exists." &&
 148                         VCSH_CONFLICT=1;
 149         done
 150         [ "$VCSH_CONFLICT" = '1' ] &&
 151                 echo "$SELF: fatal: will stop after fetching and not try to merge!\n" &&
 152                 echo "  Once this situation has been resolved, run 'vcsh run <foo> git pull' to finish cloning.\n" &&
 153                 exit 3
 154         git merge origin/master
 155 #       use $REPO_NAME || return 1
 156         verbose "clone end"
 157
 158 elif [ "$1" = 'init' ]; then
 159         verbose "init begin"
 160         [ -z $2 ] && help && echo && echo "$SELF $1: error: please specify repository to work on" && return 0
 161         export REPO_NAME="$2"
 162         export GIT_DIR="$VCSH_BASE/$REPO_NAME.git"
 163         init
 164 #       use "$REPO_NAME" || return 1
 165         verbose "init end"
 166
 167 #elif [ "$1" = 'exit' ]; then
 168 #       verbose "exit begin"
 169 #       if [ -n "$ZSH_VERSION" ] && [ "$VCSH_NO_IGNORE_EOF" = '1' ]; then
 170 #               unset VCSH_NO_IGNORE_EOF
 171 #               setopt NO_IGNORE_EOF
 172 #       fi
 173 #       leave
 174 #       [ -n "$ZSH_VERSION" ] && [ "$USER" = richih ] && buildPS1
 175 #       verbose "exit end"
 176 #       exit 0
 177
 178 elif [ "$1" = 'seed-gitignore' ]; then
 179         verbose "seed-gitignore begin"
 180         [ -z $2 ] && help && echo && echo "$SELF $1: error: please specify repository to work on" && return 0
 181         use $2 || return 1
 182         # Switching directory as this has to be executed from $HOME to be of any use.
 183         # Going back into old directory at the end in case `vcsh use` is reactivated.
 184         old_dir="$PWD"
 185         cd "$HOME"
 186         git config core.excludesfile ".gitignore.d/$REPO_NAME"
 187         gitignores=$(for file in $(git ls-files); do
 188                 while true; do
 189                         echo $file; new="${file%/*}"
 190                         [ "$file" = "$new" ] && break
 191                         file="$new"
 192                 done;
 193         done | sort -u | sed 's/^/!/')
 194         tempfile=$(mktemp) ||
 195                 (echo "$SELF: fatal: could not create tempfile" && exit 1)
 196         echo '*' > "$tempfile"
 197         for gitignore in $gitignores; do
 198                 echo "$gitignore" >> "$tempfile"
 199         done
 200         diff -N "$tempfile" "$HOME/.gitignore.d/$2" > /dev/null &&
 201                 rm -f "$tempfile" &&
 202                 return
 203         if [ -e "$HOME/.gitignore.d/$2" ]; then
 204                 echo "$SELF: info: $HOME/.gitignore.d/$2 differs from new data, moving it to $HOME/.gitignore.d/$2.bak"
 205                 mv -f "$HOME/.gitignore.d/$2" "$HOME/.gitignore.d/$2.bak" ||
 206                         (echo "$SELF: fatal: could not move $HOME/.gitignore.d/$2 to $HOME/.gitignore.d/$2.bak" && exit 1)
 207         fi
 208         mv -f "$tempfile" "$HOME/.gitignore.d/$2" ||
 209                 (echo "$SELF: fatal: could not move $tempfile to $HOME/.gitignore.d/$2" && exit 1)
 210         cd "$old_dir"
 211         verbose "seed-gitignore end"
 212
 213 elif [ "$1" = 'delete' ]; then
 214         verbose "delete begin"
 215         REPO_NAME=$2
 216         [ -z $REPO_NAME ] && help && echo && echo "$SELF $1: error: please specify repository to work on" && return 0
 217         old_dir="$PWD"
 218         cd "$HOME"
 219         use $REPO_NAME || return 1
 220         echo "$SELF: info: This operation WILL DETROY DATA!"
 221         files=$(git ls-files)
 222         echo "These files would be deleted:
 223
 224 $files
 225
 226 AGAIN, THIS WILL DELETE YOUR DATA!
 227 To continue, type \"Yes, do as I say\""
 228         read answer
 229         [ "x$answer" = "xYes, do as I say" ] || exit
 230         for file in $files; do
 231                 rm -f $file || echo "$SELF: info: could not delete '$file', continuing with deletion"
 232         done
 233         rm -rf "$VCSH_BASE/$REPO_NAME.git" || echo "$SELF: info: could not delete '$VCSH_BASE/$REPO_NAME.git'"
 234         cd "$old_dir"
 235         verbose "delete end"
 236
 237
 238 else
 239         verbose "defaulting to calling help()"
 240         help
 241         exit 3
 242
 243 fi
 244