#!/usr/bin/env bash

# This script pulls all repositories selected with llvm-projs and rebases the
# current branch on top of the new master.

. llvm-common

safe_run verify_env

function repo_sync () {
  project=$1
  repo_dir=$2
  worktree_dir=$3

  if [ ! -d $repo_dir ]; then
    echo " + Not updating $project (couldn't find source directory)"
    return;
  fi

  if [ ! -d $worktree_dir ]; then
    echo " + Not updating $project (couldn't find worktree directory)"
    return;
  fi

  echo " + Updating $project"

  # To pull master, we must be in the repo dir (we shouldn't checkout master in
  # the worktree dirs - by default, master lives in the repo dir)
  cd $repo_dir
  safe_run git-refresh

  # To rebase the current branch, we must be in the worktree dir (we shouldn't
  # checkout the current branch in the repo dir, because it is already checked
  # out in the worktree dir)
  cd $worktree_dir
  safe_run git-rebase
}

prog=`basename $0`
clang=false
rt=false
libcxx=false
libcxxabi=false
libunwind=false
linker=false
debug=false
tests=false
web=false

clang_workdir=$LLVM_SRC/tools/clang
rt_workdir=$LLVM_SRC/projects/compiler-rt
libcxx_workdir=$LLVM_SRC/projects/libcxx
libcxxabi_workdir=$LLVM_SRC/projects/libcxxabi
libunwind_workdir=$LLVM_SRC/projects/libunwind
lld_workdir=$LLVM_SRC/tools/lld
lldb_workdir=$LLVM_SRC/tools/lldb
test_workdir=$LLVM_SRC/projects/test-suite

if [ -d $clang_workdir ]; then clang=true; fi
if [ -d $rt_workdir ]; then rt=true; fi
if [ -d $libcxx_workdir ]; then libcxx=true; fi
if [ -d $libcxxabi_workdir ]; then libcxxabi=true; fi
if [ -d $libunwind_workdir ]; then libunwind=true; fi
if [ -d $lld_workdir ]; then linker=true; fi
if [ -d $lldb_workdir ]; then debug=true; fi
if [ -d $test_workdir ]; then tests=true; fi

while getopts "wa" opt; do
  case $opt in
    w)
      web=true
      ;;
    a)
      clang=true
      rt=true
      libcxx=true
      libcxxabi=true
      libunwind=true
      linker=true
      debug=true
      tests=true
      ;;
    *)
      echo "Syntax: $prog [-(w)eb pages] [-(a)ll]"
      echo "Syncs the repos that are currently linked into the llvm source tree"
      echo "-w forces sync for the web repos (which are never linked)"
      echo "-a forces sync for non-web repos that are not linked"
      exit 1
      ;;
  esac
done

llvm_repos=$LLVM_ROOT/repos

# Compulsory updates
repo_sync LLVM $llvm_repos/llvm $LLVM_SRC

if $clang; then
  repo_sync Clang $llvm_repos/clang $clang_workdir
fi

# Optional updates
if $rt; then
  repo_sync RT $llvm_repos/compiler-rt $rt_workdir
fi

if $libcxx; then
  repo_sync LibC++ $llvm_repos/libcxx $libcxx_workdir
fi

if $libcxxabi; then
  repo_sync LibC++ABI $llvm_repos/libcxxabi $libcxxabi_workdir
fi

if $libunwind; then
  repo_sync LibUnwind $llvm_repos/libunwind $libunwind_workdir
fi

if $linker; then
  repo_sync Linker $llvm_repos/lld $lld_workdir
fi

if $debug; then
  repo_sync Debugger $llvm_repos/lldb $lldb_workdir
fi

if $tests; then
  repo_sync Test-Suite $llvm_repos/test-suite $test_workdir
  repo_sync LNT $llvm_repos/lnt $llvm_repos/lnt
  repo_sync Zorg $llvm_repos/zorg $llvm_repos/zorg
fi

# These are pure SVN repos, not enabled with -a
# You have to manually force with -w
if $web; then
  if [ -d $llvm_repos/www ]; then
    echo " + Updating WWW"
    cd $llvm_repos/www $llvm_repos/www
    svn up
  fi
  if [ -d $llvm_repos/pubs ]; then
    echo " + Updating Pubs"
    cd $llvm_repos/pubs $llvm_repos/pubs
    svn up
  fi
fi