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#!/bin/bash
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# This script updates checked-in generated files (currently CMakeLists.txt,
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# descriptor.upb.h, and descriptor.upb.c), commits the resulting change, and
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# pushes it. This does not do anything useful when run manually, but should be
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# run by our GitHub action instead.
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set -ex
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# Exit early if the previous commit was made by the bot. This reduces the risk
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# of a bug causing an infinite loop of auto-generated commits.
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if (git log -1 --pretty=format:'%an' | grep -q "Protobuf Team Bot"); then
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echo "Previous commit was authored by bot"
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exit 0
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fi
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cd $(dirname -- "$0")/..
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bazel test //cmake:test_generated_files || bazel-bin/cmake/test_generated_files --fix
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# Try to determine the most recent pull request number.
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title=$(git log -1 --pretty='%s')
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pr_from_merge=$(echo "$title" | sed -n 's/^Merge pull request #\([0-9]\+\).*/\1/p')
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pr_from_squash=$(echo "$title" | sed -n 's/^.*(#\([0-9]\+\))$/\1/p')
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pr_number=""
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if [ ! -z "$pr_from_merge" ]; then
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pr_number="$pr_from_merge"
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elif [ ! -z "$pr_from_squash" ]; then
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pr_number="$pr_from_squash"
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fi
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if [ ! -z "$pr_number" ]; then
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commit_message="Auto-generate CMake file lists after PR #$pr_number"
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else
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# If we are unable to determine the pull request number, we fall back on this
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# default commit message. Typically this should not occur, but could happen
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# if a pull request was merged via a rebase.
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commit_message="Auto-generate CMake file lists"
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fi
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git add -A
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git diff --staged --quiet || git commit -am "$commit_message"
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git push
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