peridot/hack/get_impacted_targets.sh

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#!/usr/bin/env bash
set -o errexit
source hack/bazel_setup.sh
bazel_bin="$(which bazel)"
workspace_dir="$(pwd)"
$BAZEL_B //:bazel-diff
# Fetch all refs
git fetch --all
# Starting point
STARTING_COMMIT="$(git rev-parse HEAD)"
# Find base and target hash
BASE_HASH="$PULL_BASE_SHA"
TARGET_HASH="$PULL_PULL_SHA"
if [[ -z "$TARGET_HASH" ]]; then
BASE_HASH="$(git log "HEAD~" --pretty=format:"%H" --merges -n 1)"
TARGET_HASH="$PULL_BASE_SHA"
fi
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# Generate starting hashes
echo "Base hash is $BASE_HASH"
git checkout "$BASE_HASH" --quiet
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bazel-bin/bazel-diff generate-hashes -w "$workspace_dir" -b "$bazel_bin" starting_hashes_json
# Generate ending hashes
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echo "Target hash is $TARGET_HASH"
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git checkout "$TARGET_HASH" --quiet
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bazel-bin/bazel-diff generate-hashes -w "$workspace_dir" -b "$bazel_bin" ending_hashes_json
# Get impacted targets
bazel-bin/bazel-diff get-impacted-targets -sh starting_hashes_json -fh ending_hashes_json -o impacted_targets
# Checkout back to starting commit
git checkout "$STARTING_COMMIT" --quiet