vcsh

   1 #!/bin/sh
   2
   3 [ "$VCSH_DEBUG" = '1' ] && set -x
   4
   5 SELF=$(basename $0)
   6
   7 [ -z "$XDG_CONFIG_HOME" ] && XDG_CONFIG_HOME="$HOME/.config"
   8 for check_directory in $XDG_CONFIG_HOME $XDG_CONFIG_HOME/vcsh $XDG_CONFIG_HOME/vcsh/repo.d
   9 do
  10         if [ ! -d "$check_directory" ]; then
  11                 if [ -e "$check_directory" ]; then
  12                         echo "$SELF: error: $check_directory exists but is not a directory" >&2
  13                         exit 2
  14                 else
  15                         mkdir $check_directory || (echo "$SELF: error: could not create $check_directory" >&2; exit 2)
  16                 fi
  17         fi
  18 done
  19
  20 VCSH_BASE="$XDG_CONFIG_HOME/vcsh/repo.d"
  21
  22 debug() {
  23         [ "$VCSH_DEBUG" = '1' ] && echo "$SELF: debug: $1"
  24 }
  25
  26 verbose() {
  27         if [ "$VCSH_DEBUG" = '1' ] || [ "$VCSH_VERBOSE" = '1' ]; then echo "$SELF: verbose: $1"; fi
  28 }
  29
  30 help() {
  31         echo "usage: $SELF <args>
  32
  33    help           Display this help
  34
  35    list           List all repos
  36
  37    use <repo>     Use this repository
  38    run <repo>
  39        <command>  Use this repository
  40
  41    init           Initialize a new repository
  42    clone <remote>
  43          [<repo>] Clone from an existing repository
  44
  45    exit           Exit vcsh mode" >&2
  46 }
  47
  48 use() {
  49         verbose "use() begin"
  50         REPO_NAME="$1"
  51         GIT_DIR="$VCSH_BASE/$REPO_NAME.git"
  52
  53         if [ ! -d "$GIT_DIR" ]; then
  54                 echo E: no repository found for "$REPO_NAME" >&2
  55                 return 2
  56         fi
  57
  58         export GIT_DIR
  59         export GIT_WORK_TREE="$(git config --get core.worktree)"
  60         export VCSH_DIRECTORY="$REPO_NAME"
  61         verbose "use() end"
  62 }
  63
  64 init() {
  65         verbose "init() begin"
  66         [ -e "$GIT_DIR" ] &&
  67                 echo "$SELF: fatal: $GIT_DIR exists" &&
  68                 return 21
  69         export GIT_WORK_TREE="$HOME"
  70         mkdir -p $GIT_WORK_TREE
  71         cd $GIT_WORK_TREE ||
  72                 (echo "$SELF: fatal: could not enter $GIT_WORK_TREE" &&
  73                  exit 20) || exit 20
  74         cd $GIT_WORK_TREE
  75         git init
  76         git config core.worktree $GIT_WORK_TREE
  77         verbose "init() end"
  78 }
  79
  80 leave() {
  81         unset GIT_DIR
  82         unset GIT_WORK_TREE
  83         unset VCSH_DIRECTORY
  84 }
  85
  86 if [ "$1" = 'help' ] || [ "$#" -eq 0 ]; then
  87         help
  88         [ "$1" = 'help' ]
  89         exit $?
  90
  91 elif [ "$1" = 'list' ]; then
  92         verbose "list begin"
  93         for i in $VCSH_BASE/*.git; do
  94                 echo $(basename $i .git)
  95         done
  96         verbose "list end"
  97         exit 0
  98
  99 elif [ "$1" = 'run' ]; then
 100         verbose "run begin"
 101         use $2
 102         shift 2
 103         "$@"
 104         leave
 105         verbose "run end"
 106         exit 0
 107
 108 elif [ "$1" = 'use' ]; then
 109         verbose "use begin"
 110         if [ -n "$ZSH_VERSION" ]; then
 111                 if [ -o NO_IGNORE_EOF ]; then
 112                         export VCSH_NO_IGNORE_EOF=1
 113                         setopt IGNORE_EOF
 114                 fi
 115                 vcsh_exit() {
 116                         vcsh exit;
 117                         zle reset-prompt;
 118                 }
 119                 zle -N vcsh_exit
 120                 bindkey '^d' 'vcsh_exit'
 121         fi
 122         use $2
 123         [ -n "$ZSH_VERSION" ] && [ "$USER" = richih ] && buildPS1
 124         verbose "use end"
 125         exit 0
 126
 127 elif [ "$1" = 'clone' ]; then
 128         verbose "clone begin"
 129         GIT_REMOTE="$2"
 130         REPO_NAME="$3"
 131         [ -z "$REPO_NAME" ] && REPO_NAME=$(basename $GIT_REMOTE .git)
 132         export REPO_NAME
 133         export GIT_DIR="$VCSH_BASE/$REPO_NAME.git"
 134         init
 135
 136         git remote add origin $GIT_REMOTE
 137         git config branch.master.remote origin
 138         git config branch.master.merge  refs/heads/master
 139         git fetch
 140         for object in $(git ls-tree -r origin/master | awk '{print $4}'); do
 141                 [ -e "$object" ] &&
 142                         echo "$SELF: error: $object exists." &&
 143                         VCSH_CONFLICT=1;
 144         done
 145         [ "$VCSH_CONFLICT" = '1' ] &&
 146                 echo "$SELF: fatal: will stop after fetching and not try to merge!\n" &&
 147                 exit 3
 148         git merge origin/master
 149         vcsh use $REPO_NAME
 150         verbose "clone end"
 151
 152 elif [ "$1" = 'init' ]; then
 153         verbose "init begin"
 154         export REPO_NAME="$2"
 155         export GIT_DIR="$VCSH_BASE/$REPO_NAME.git"
 156         init
 157         vcsh use $REPO_NAME
 158         verbose "init end"
 159
 160 elif [ "$1" = 'exit' ]; then
 161         verbose "exit begin"
 162         if [ -n "$ZSH_VERSION" ] && [ "$VCSH_NO_IGNORE_EOF" = '1' ]; then
 163                 unset VCSH_NO_IGNORE_EOF
 164                 setopt NO_IGNORE_EOF
 165         fi
 166         leave
 167         [ -n "$ZSH_VERSION" ] && [ "$USER" = richih ] && buildPS1
 168         verbose "exit end"
 169         exit 0
 170
 171 else
 172         verbose "defaulting to calling help()"
 173         help
 174         exit 3
 175
 176 fi
 177