packaging/prep-auto-dir

   1 #!/bin/sh -e
   2
   3 # This script will setup the build dir based on the current git branch and the
   4 # directory auto-build-save/$BRANCH.  We don't use a symlink for the build dir
   5 # because we want to maximize the ccache reuse, so all builds must happen in
   6 # the same real dir.  When a dir is moved out of auto-build-save/$BRANCH to the
   7 # build dir, it is replaced with a symlink so that it can still be found under
   8 # that dir.  The build dir also gets a .branch -> $BRANCH symlink so that we
   9 # can figure out the current build dir's branch.
  10
  11 # To get started, just clone the rsync git repo and create the auto-build-save
  12 # dir.  If you have an existing git checkout and it is not in a pristine state,
  13 # run "make distclean" before creating the auto-build-save dir.
  14
  15 auto_top='auto-build-save'
  16 if test -d $auto_top && test -d .git; then
  17     desired_branch=`git rev-parse --abbrev-ref HEAD | tr / %`
  18     if test "$desired_branch" = HEAD; then
  19         echo "ERROR: switch to the right build dir manually when in detached HEAD mode." 1>&2
  20         exit 1
  21     fi
  22     auto_dir="$auto_top/$desired_branch"
  23     if test -d build; then
  24         cur_branch=`readlink build/.branch`
  25     else
  26         cur_branch='/'
  27     fi
  28     if test "$desired_branch" != "$cur_branch"; then
  29         if test "$cur_branch" != /; then
  30             rm -f "$auto_top/$cur_branch"
  31             mv build "$auto_top/$cur_branch"
  32         fi
  33         test -d "$auto_dir" || mkdir "$auto_dir"
  34         test -h "$auto_dir/.branch" || ln -s "$desired_branch" "$auto_dir/.branch"
  35         mv "$auto_dir" build
  36         ln -s ../build "$auto_dir"
  37     fi
  38     if test ! -h Makefile; then
  39         rm -f Makefile
  40         ln -s packaging/auto-Makefile Makefile
  41     fi
  42     echo $desired_branch
  43 fi