Merge "Add a tool to dump git SHAs of API changes" am: 457ccf2d

#!/bin/bash -e

# This script dumps the git SHAs of all commits inside api tracking directories.

# It can used by tools wanting to track API changes, and the primary original

# purpose is to verify verify all API change SHAs have been tracked by the

# server-side API-council tools.

#

# The only argument is used to specify a git commit range to filter by.

#

# Example invocation (API changes between O and P):

# frameworks/base/api/dump_api_shas.sh origin/oreo-dev..origin/pie-dev

set -o pipefail

eecho() { echo $@ >&2 ; }

if [[ $1 == *..* ]]; then

    exclude=${1/..*}

    include=${1/*..}

else

    eecho No range or invalid range specified, defaulting to all commits from HEAD.

    exclude=

    include=HEAD

fi

eecho -n building queryview...

{ source build/envsetup.sh && lunch aosp_arm && m queryview; } >/dev/null 2>&1 \

  || { eecho failed; exit 1; }

eecho "done"

# This finds the directories where the dependant java_sdk_libs are defined

bpdirs=$(

  bazel query --config=queryview --output=package \

    'kind(java_sdk_library, deps(//frameworks/base/api/..., 1))' 2>/dev/null

  echo frameworks/base/core/api # Not a java_sdk_library.

  echo frameworks/base/services/api # Not a java_sdk_library.

)

# Find relevant api subdirectories

apidirs=$(

  find $bpdirs -type f -name '*current.txt' -path '*/api/*' \

    | xargs realpath --relative-to=$(pwd) | xargs dirname | sort | uniq

)

# Dump sorted SHAs of commits in these directories

{ for d in $apidirs; do

    ( cd $d

      eecho inspecting $d

      exclude_arg=$(test -n "$exclude" && {

        git rev-parse -q --verify $exclude > /dev/null && echo "--not $exclude" \

          || eecho "$d has no revision $exclude, including all commits"; } || true)

      for f in $(find . -name '*current.txt'); do

        git --no-pager log --pretty=format:%H --no-merges --follow $include $exclude_arg -- $f

        echo # No trailing newline with --no-pager

      done

    )

done; } | sort | uniq