ClickHouse/utils/simple-backport/backport.sh

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#!/bin/bash
set -e
branch="$1"
merge_base=$(git merge-base origin/master "origin/$branch")
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master_git_cmd=(git log "$merge_base..origin/master" --first-parent)
branch_git_cmd=(git log "$merge_base..origin/$branch" --first-parent)
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# Make lists of PRs that were merged into each branch. Use first parent here, or else
# we'll get weird things like seeing older master that was merged into a PR branch
# that was then merged into master.
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"${master_git_cmd[@]}" > master-log.txt
"${branch_git_cmd[@]}" > "$branch-log.txt"
# Check for diamond merges.
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diamonds_in_master=$("${master_git_cmd[@]}" --oneline --grep "Merge branch '")
diamonds_in_branch=$("${branch_git_cmd[@]}" --oneline --grep "Merge branch '")
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if [ "$diamonds_in_master" != "" ] || [ "$diamonds_in_branch" != "" ]
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then
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echo "$diamonds_in_master"
echo "$diamonds_in_branch"
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# DO NOT ADD automated handling of diamond merges to this script.
# It is an unsustainable way to work with git, and it MUST be visible.
echo Warning: suspected diamond merges above.
echo Some commits will be missed, review these manually.
fi
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# NOTE keep in sync with ./changelog.sh.
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# Search for PR numbers in commit messages. First variant is normal merge, and second
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# variant is squashed. Next are some backport message variants.
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find_prs=(sed -n "s/^.*Merge pull request #\([[:digit:]]\+\).*$/\1/p;
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s/^.*(#\([[:digit:]]\+\))$/\1/p;
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s/^.*back[- ]*port[ed of]*#\([[:digit:]]\+\).*$/\1/Ip;
s/^.*cherry[- ]*pick[ed of]*#\([[:digit:]]\+\).*$/\1/Ip")
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"${find_prs[@]}" master-log.txt | sort -rn > master-prs.txt
"${find_prs[@]}" "$branch-log.txt" | sort -rn > "$branch-prs.txt"
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# Find all master PRs that are not in branch by calculating differences of two PR lists.
grep -f "$branch-prs.txt" -F -x -v master-prs.txt > "$branch-diff-prs.txt"
echo "$(wc -l < "$branch-diff-prs".txt) PRs differ between $branch and master."
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function github_download()
{
local url=${1}
local file=${2}
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if ! [ -f "$file" ]
then
if ! curl -H "Authorization: token $GITHUB_TOKEN" \
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-sSf "$url" \
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> "$file"
then
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>&2 echo "Failed to download '$url' to '$file'. Contents: '$(cat "$file")'."
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rm "$file"
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return 1
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fi
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sleep 0.1
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fi
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}
rm "$branch-report.tsv" &> /dev/null ||:
for pr in $(cat "$branch-diff-prs.txt")
do
# Download PR info from github.
file="pr$pr.json"
github_download "https://api.github.com/repos/ClickHouse/ClickHouse/pulls/$pr" "$file" || continue
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if ! [ "$pr" == "$(jq -r .number "$file")" ]
then
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>&2 echo "Got wrong data for PR #$pr (please check and remove '$file')."
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continue
fi
action="skip"
# First, check the changelog category. We port all bugfixes.
if jq -r .body "$file" | grep -i "^- bug[ -]*fix" > /dev/null
then
action="backport"
fi
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# Next, check the tag. They might override the decision. Checks are ordered by priority.
labels="$(jq -r .labels[].name "$file")"
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if echo "$labels" | grep -x "pr-must-backport\|v$branch-must-backport" > /dev/null; then action="backport"; fi
if echo "$labels" | grep -x "v$branch-conflicts" > /dev/null; then action="conflict"; fi
if echo "$labels" | grep -x "pr-no-backport\|v$branch-no-backport" > /dev/null; then action="no-backport"; fi
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# FIXME Ignore "backported" labels for now. If we can't find the backport commit,
# this means that the changelog script also won't be able to. An alternative
# way to mark PR as backported is to add an empty commit with text like
# "backported #12345", so that it can be found between tags and put in proper
# place in changelog.
#if echo "$labels" | grep -x "v$branch\|v$branch-backported" > /dev/null; then action="done"; fi
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# Find merge commit SHA for convenience
merge_sha="$(jq -r .merge_commit_sha "$file")"
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url="https://github.com/ClickHouse/ClickHouse/pull/$pr"
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printf "%s\t%s\t%s\t%s\t%s\n" "$action" "$pr" "$url" "$file" "$merge_sha" >> "$branch-report.tsv"
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if [ "$action" == "backport" ]
then
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printf "%s\t%s\t%s\n" "$action" "$url" "$merge_sha"
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fi
done
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echo "Done."