#!/bin/bash -e
#
# Purpose:
#  This script is responsible for determining the owner of a gerrit
#  commit, verifying they are within an approved gerrit group, and
#  then updating gerrit with that verification info.
#
# Note: It is assumed this script is run as a part of a jenkins job triggered
#       by the gerrit plugin. Therefore it assumes certain env variables
#       provided by that plugin are avialable (i.e. GERRIT_PROJECT, ...)
#
# Required Inputs:
#  SSH_KEY:  Path to private ssh key used to post messages to gerrit

GERRIT_COMMAND="curl -s --anyauth -n https://gerrit.openbmc.org"
GERRIT_SSH_CMD=( \
    ssh -o 'StrictHostKeyChecking no' -i "$SSH_KEY" \
    -p 29418 jenkins-openbmc-ci@gerrit.openbmc.org gerrit \
)

echo "Checking ${GERRIT_PROJECT}:${GERRIT_BRANCH}:${GERRIT_CHANGE_ID}:${GERRIT_PATCHSET_REVISION}"

# shellcheck disable=2086 # GERRIT_COMMAND is purposefully wordsplit.
COMMITTER_EMAIL=$(${GERRIT_COMMAND}/a/changes/${GERRIT_PROJECT/\//%2F}~${GERRIT_BRANCH}~${GERRIT_CHANGE_ID}/revisions/${GERRIT_PATCHSET_REVISION}/commit | python2 -c "import sys, json; sys.stdin.read(4); print(json.load(sys.stdin)['committer']['email'])")
if [ "${COMMITTER_EMAIL}" = "" ]; then
    echo "Unable to find committer."
    "${GERRIT_SSH_CMD[@]}" review \
        "${GERRIT_CHANGE_NUMBER},${GERRIT_PATCHSET_NUMBER}" \
        --ok-to-test=0 "--message='Unable to determine committer'"
    exit 1
fi

#echo "Commit by '${COMMITTER_EMAIL}'"
# shellcheck disable=2086 # GERRIT_COMMAND is purposefully wordsplit.
COMMITTER_USERNAME=$(${GERRIT_COMMAND}/a/accounts/${COMMITTER_EMAIL} | python2 -c "import sys, json; sys.stdin.read(4); print(json.load(sys.stdin)['username'])")
#COMMITTER_USERNAME=`${GERRIT_COMMAND}/a/accounts/${COMMITTER_EMAIL}`
echo "USERNAME: $COMMITTER_USERNAME"
if [ "${COMMITTER_USERNAME}" = "" ]; then
    echo "Unable to determine github user for ${COMMITTER_EMAIL}."
    "${GERRIT_SSH_CMD[@]}" review \
        "${GERRIT_CHANGE_NUMBER},${GERRIT_PATCHSET_NUMBER}" \
        --ok-to-test=0 "--message='Unable to determine github user'"
    exit 1
fi

# Reset the vote to 0 so jenkins will detect a new +1 on retriggers
"${GERRIT_SSH_CMD[@]}" review \
    "${GERRIT_CHANGE_NUMBER},${GERRIT_PATCHSET_NUMBER}" \
    --ok-to-test=0 -t autogenerated:jenkins --notify=NONE

# Write full list of users to a file
GERRIT_CI_GROUPS=( \
    alibaba/ci-authorized \
    amd/ci-authorized \
    ami/ci-authorized \
    ampere/ci-authorized \
    arm/ci-authorized \
    aspeed/ci-authorized \
    bytedance/ci-authorized \
    code-construct/ci-authorized \
    depo/ci-authorized \
    erg/ci-authorized \
    facebook/ci-authorized \
    fii/ci-authorized \
    gager-in/ci-authorized \
    google/ci-authorized \
    hcl/ci-authorized \
    hpe/ci-authorized \
    ibm/ci-authorized \
    individual/ci-authorized \
    inspur/ci-authorized \
    intel/ci-authorized \
    inventec/ci-authorized \
    lenovo/ci-authorized \
    nineelements/ci-authorized \
    nuvoton/ci-authorized \
    nvidia/ci-authorized \
    openbmc/ci-authorized \
    pcpartner/ci-authorized \
    quanta/ci-authorized \
    quic/ci-authorized \
    rcs/ci-authorized \
    supermicro/ci-authorized \
    wistron/ci-authorized \
    wiwynn/ci-authorized \
    yadro/ci-authorized \
)

rm -f "$WORKSPACE/users.txt"
for g in "${GERRIT_CI_GROUPS[@]}"; do
    "${GERRIT_SSH_CMD[@]}" ls-members "$g" --recursive \
        >> "$WORKSPACE/users.txt"
done

# grep for the specific username word in the file
if grep -q -w "${COMMITTER_USERNAME}" "$WORKSPACE/users.txt"; then
    "${GERRIT_SSH_CMD[@]}" review \
        "${GERRIT_CHANGE_NUMBER},${GERRIT_PATCHSET_NUMBER}" \
        --ok-to-test=1 -t autogenerated:jenkins --notify=NONE \
        "--message='User approved, CI ok to start'"

    # Immediately erase the score to prevent infinite triggers.
    "${GERRIT_SSH_CMD[@]}" review \
        "${GERRIT_CHANGE_NUMBER},${GERRIT_PATCHSET_NUMBER}" \
        --ok-to-test=0 -t autogenerated:jenkins --notify=NONE

    exit 0
fi

echo "${COMMITTER_USERNAME} is not on the approved list."
"${GERRIT_SSH_CMD[@]}" review \
    "${GERRIT_CHANGE_NUMBER},${GERRIT_PATCHSET_NUMBER}" \
    --ok-to-test=0 -t autogenerated:jenkins \
    "--message='User not approved, see admin, no CI'"

exit 0