element-web/scripts/fetchdep.sh

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#!/bin/bash
set -x
deforg="$1"
defrepo="$2"
defbranch="$3"
[ -z "$defbranch" ] && defbranch="develop"
rm -r "$defrepo" || true
# A function that clones a branch of a repo based on the org, repo and branch
clone() {
org=$1
repo=$2
branch=$3
if [ -n "$branch" ]
then
echo "Trying to use $org/$repo#$branch"
# Disable auth prompts: https://serverfault.com/a/665959
GIT_TERMINAL_PROMPT=0 git clone https://github.com/$org/$repo.git $repo --branch "$branch" --depth 1 && exit 0
fi
}
# A function that gets info about a PR from the GitHub API based on its number
getPRInfo() {
number=$1
if [ -n "$number" ]; then
echo "Getting info about a PR with number $number"
apiEndpoint="https://api.github.com/repos/matrix-org/matrix-react-sdk/pulls/"
apiEndpoint+=$number
head=$(curl $apiEndpoint | jq -r '.head.label')
fi
}
# Some CIs don't give us enough info, so we just get the PR number and ask the
# GH API for more info - "fork:branch". Some give us this directly.
if [ -n "$BUILDKITE_BRANCH" ]; then
# BuildKite
head=$BUILDKITE_BRANCH
elif [ -n "$PR_NUMBER" ]; then
# GitHub
getPRInfo $PR_NUMBER
elif [ -n "$REVIEW_ID" ]; then
# Netlify
getPRInfo $REVIEW_ID
fi
# $head will always be in the format "fork:branch", so we split it by ":" into
# an array. The first element will then be the fork and the second the branch.
# Based on that we clone
BRANCH_ARRAY=(${head//:/ })
clone ${BRANCH_ARRAY[0]} $defrepo ${BRANCH_ARRAY[1]}
# Try the target branch of the push or PR.
if [ -n $GITHUB_BASE_REF ]; then
clone $deforg $defrepo $GITHUB_BASE_REF
elif [ -n $BUILDKITE_PULL_REQUEST_BASE_BRANCH ]; then
clone $deforg $defrepo $BUILDKITE_PULL_REQUEST_BASE_BRANCH
fi
# Try HEAD which is the branch name in Netlify (not BRANCH which is pull/xxxx/head for PR builds)
clone $deforg $defrepo $HEAD
# Use the default branch as the last resort.
clone $deforg $defrepo $defbranch