prep_repo.sh - mozsearch

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#!/bin/bash

function show_error_msg()

  echo "*** ERROR *** $? line $1 $0 did not complete successfully!"

  echo "$ERROR_HELP"

ERROR_HELP=""

# Print an Error message if `set -eE` causes the script to exit due to a failed command

trap 'show_error_msg $LINENO' ERR

source dom/media/webrtc/third_party_build/use_config_env.sh

export HGPLAIN=1

if [ "x$ALLOW_RERUN" = "x" ]; then

  ALLOW_RERUN="0"

fi

echo "MOZ_LIBWEBRTC_SRC: $MOZ_LIBWEBRTC_SRC"

echo "MOZ_LIBWEBRTC_BRANCH: $MOZ_LIBWEBRTC_BRANCH"

echo "MOZ_FASTFORWARD_BUG: $MOZ_FASTFORWARD_BUG"

echo "ALLOW_RERUN: $ALLOW_RERUN"

ERROR_HELP=$"

A copy of moz-libwebrtc already exists at $MOZ_LIBWEBRTC_SRC

While this script is not technically idempotent, it will try.

However, the safest way forward is to start fresh by running:

    rm -rf $STATE_DIR && \\

    bash $0

If you are sure you want to reuse the existing directory, run:

    ALLOW_RERUN=1 bash $0

if [ -d $MOZ_LIBWEBRTC_SRC ] && [ "x$ALLOW_RERUN" != "x1" ]; then

  echo "$ERROR_HELP"

  exit 1

fi

ERROR_HELP=""

# After this point:

# * eE: All commands should succeed.

# * u: All variables should be defined before use.

# * o pipefail: All stages of all pipes should succeed.

set -eEuo pipefail

# set CLONE_PROTOCOL="https", ignored if the repo already exists.

CLONE_PROTOCOL="https"

# don't prompt for clone protocol if repo already exists

if [ ! -d $MOZ_LIBWEBRTC_SRC ]; then

  echo "Clone moz-libwebrtc git repo with http or ssh?"

  select yn in "https" "ssh"; do

    case $yn in

      https ) echo "Clone w/ https"; CLONE_PROTOCOL="https"; break;;

      ssh ) echo "Clone w/ ssh"; CLONE_PROTOCOL="ssh"; break;;

    esac

  done

fi

# wipe resume_state for new run

rm -f $STATE_DIR/resume_state

# If there is no cache file for the branch-head lookups done in

# update_default_config.sh, go ahead and copy our small pre-warmed

# version.

if [ ! -f $STATE_DIR/milestone.cache ]; then

  cp $SCRIPT_DIR/pre-warmed-milestone.cache $STATE_DIR/milestone.cache

fi

# If there is no .mozconfig file, copy a basic one from default_mozconfig

if [ ! -f .mozconfig ]; then

  cp $SCRIPT_DIR/default_mozconfig .mozconfig

fi

# fetch the github repro

./mach python $SCRIPT_DIR/fetch_github_repo.py \

    --repo-path $MOZ_LIBWEBRTC_SRC \

    --clone-protocol $CLONE_PROTOCOL \

    --state-path $STATE_DIR

CURRENT_DIR=`pwd`

cd $MOZ_LIBWEBRTC_SRC

# clear any possible previous patches

rm -f *.patch

# create a new work branch and "export" a new patch stack to rebase

# find the common commit between our upstream release branch and trunk

PREVIOUS_RELEASE_BRANCH_BASE=`git merge-base branch-heads/$MOZ_PRIOR_UPSTREAM_BRANCH_HEAD_NUM master`

echo "PREVIOUS_RELEASE_BRANCH_BASE: $PREVIOUS_RELEASE_BRANCH_BASE"

NEXT_RELEASE_BRANCH_BASE=`git merge-base $MOZ_TARGET_UPSTREAM_BRANCH_HEAD master`

echo "NEXT_RELEASE_BRANCH_BASE: $NEXT_RELEASE_BRANCH_BASE"

ERROR_HELP=$"

The previous release branch base ($PREVIOUS_RELEASE_BRANCH_BASE)

and the next release branch base ($NEXT_RELEASE_BRANCH_BASE) are the

same and should not be.  This indicates a problem in the git repo at

$MOZ_LIBWEBRTC_SRC.

At the least it likely means that 'master' is older than the two

release branches.  Investigation is necessary.

if [ "x$PREVIOUS_RELEASE_BRANCH_BASE" == "x$NEXT_RELEASE_BRANCH_BASE" ]; then

  echo "$ERROR_HELP"

  exit 1

fi

ERROR_HELP=""

# find the last upstream commit used by the previous update, so we don't

# accidentally grab release branch commits that were added after we started

# the previous update.

LAST_UPSTREAM_COMMIT_SHA=`tail -1 $CURRENT_DIR/third_party/libwebrtc/README.moz-ff-commit`

echo "previous update's last commit: $LAST_UPSTREAM_COMMIT_SHA"

# create a new branch at the common commit and checkout the new branch

ERROR_HELP=$"

Unable to create branch '$MOZ_LIBWEBRTC_BRANCH'.  This probably means

that prep_repo.sh is being called on a repo that already has a patch

stack in progress.  If you're sure you want to do this, the following

commands will allow the process to continue:

  ( cd $MOZ_LIBWEBRTC_SRC && \\

    git checkout $MOZ_LIBWEBRTC_BRANCH && \\

    git checkout -b $MOZ_LIBWEBRTC_BRANCH-old && \\

    git branch -D $MOZ_LIBWEBRTC_BRANCH ) && \\

  ALLOW_RERUN=1 bash $0

git branch $MOZ_LIBWEBRTC_BRANCH $PREVIOUS_RELEASE_BRANCH_BASE

ERROR_HELP=""

git checkout $MOZ_LIBWEBRTC_BRANCH

# make sure we're starting with a clean tmp directory

rm -f $TMP_DIR/*.patch $TMP_DIR/*.patch.bak

# grab the patches for all the commits in chrome's release branch for libwebrtc

git format-patch -o $TMP_DIR -k $PREVIOUS_RELEASE_BRANCH_BASE..$LAST_UPSTREAM_COMMIT_SHA

# tweak the release branch commit summaries to show they were cherry picked

sed -i.bak -e "/^Subject: / s/^Subject: /Subject: (cherry-pick-branch-heads\/$MOZ_PRIOR_UPSTREAM_BRANCH_HEAD_NUM) /" $TMP_DIR/*.patch

git am $TMP_DIR/*.patch # applies to branch mozpatches

rm $TMP_DIR/*.patch $TMP_DIR/*.patch.bak

# we don't use restore_patch_stack.py here because it would overwrite the patches

# from the previous release branch we just added in the above step.

# grab all the moz patches and apply

git am $CURRENT_DIR/third_party/libwebrtc/moz-patch-stack/*.patch

cd $CURRENT_DIR

# cp all the no-op files to STATE_DIR

NO_OP_FILE_COUNT=`ls third_party/libwebrtc/moz-patch-stack \

    | grep "no-op-cherry-pick-msg" | wc -l | tr -d " " || true`

if [ "x$NO_OP_FILE_COUNT" != "x0" ]; then

  cp $CURRENT_DIR/third_party/libwebrtc/moz-patch-stack/*.no-op-cherry-pick-msg \

     $STATE_DIR

fi

bash $SCRIPT_DIR/verify_vendoring.sh || exit 1