find_dcos_mesos_bump.sh

#!/bin/bash

set -eux

DCOS="$HOME"/src/dcos
MESOS="$HOME"/src/mesos

COMMIT=$1

# Check if Mesos commit $1 contains $2.
contains() {
  git --git-dir="$MESOS"/.git rev-list "$1" | grep -q "$2"
}

# Check if commit has already landed in dcos.
contains "$(jq -r '.single_source.ref' "$DCOS"/packages/mesos/buildinfo.json)" "$COMMIT" || (echo "$COMMIT has not landed" && exit 1)

LAST_REV=
for rev in $(git --git-dir="$DCOS/.git" rev-list HEAD -- packages/mesos/buildinfo.json); do
  LAST_REV="$rev"
  contains "$(git show "$rev":packages/mesos/buildinfo.json | jq -r '.single_source.ref')" "$COMMIT" || break
done

if [ -z "$LAST_REV" ]; then
  echo "Could not find commit introducing $COMMIT"
  exit 1
fi

git --git-dir="$DCOS/.git" show "$LAST_REV"