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