philroche · August 19, 2024 14:41
diff --git a/github-compare-summary-update-pr.sh b/github-compare-summary-update-pr.sh
 #!/bin/bash -eu
 # Helpful script to summarize the commits and files changes between two git SHAs or branches or tags using the github API and updating a wolfi version update pull request with the summary.
 # This is very specific to wolfi version update PRs.
 # Usage: ./github-compare-summary-update-pr.sh <wolfi version update PR URL>
 # Example: ./github-compare-summary-update-pr.sh "https://github.com/wolfi-dev/os/pull/26617"

 base_url="https://api.github.com/repos/"

 # get the repo as the first argument
 version_bump_pull_request_url=$1

 # parse the owner, repository name and pull request number from the pull request URL
 # example pull request URL: https://github.com/wolfi-dev/os/pull/26610
 # Parse the owner, repository name, and pull request number
 owner=$(echo "${version_bump_pull_request_url}" | awk -F'/' '{print $4}')
 repo=$(echo "${version_bump_pull_request_url}" | awk -F'/' '{print $5}')
 pr_number=$(echo "${version_bump_pull_request_url}" | awk -F'/' '{print $7}')

 # Output the parsed values
 echo "Pull Request: ${version_bump_pull_request_url}"
 echo "Owner: ${owner}"
 echo "Repository: ${repo}"
 echo "Pull Request Number: ${pr_number}"

 echo "https://api.github.com/repos/${owner}/${repo}/pulls/${pr_number}"

 # use the guthub cli to get the pull request details
 pull_request_data=$(gh api \
  -H "Accept: application/vnd.github+json" \
  -H "X-GitHub-Api-Version: 2022-11-28" \
  /repos/${owner}/${repo}/pulls/${pr_number})

 # get the diff URL for this pull request using the diff_url field in the pull_request_data json
 diff_url=$(echo "${pull_request_data}" | jq --raw-output '.diff_url')
 echo "Diff URL: ${diff_url}"

 diff_data=$(gh api \
  -H "X-GitHub-Api-Version: 2022-11-28" "${diff_url}")

 # Parse the repository name from the diff data by parsing `repository:` line from the diff data
 upstream_repository_url=$(echo "${diff_data}" | grep --max-count=1 "repository:" | awk '{print $2}')
 # parse the owner, repository name upstream repository URL
 # example pull request URL: https://github.com/Homebrew/brew
 # Parse the owner, repository name
 upstream_owner=$(echo "${upstream_repository_url}" | awk -F'/' '{print $4}')
 upstream_repo=$(echo "${upstream_repository_url}" | awk -F'/' '{print $5}')

 # Output the parsed values
 echo "Upstream repository URL: ${upstream_repository_url}"
 echo "Upstream owner: ${upstream_owner}"
 echo "Upstream repository: ${upstream_repo}"

 from_sha=$(echo "${diff_data}" | grep --max-count=1 --only-matching --extended-regexp "^\-\s+expected-commit:\s+([a-f0-9])+" | sed -E 's/-\s+expected-commit:\s+([a-f0-9]+)/\1/' )
 to_sha=$(echo "${diff_data}" | grep --max-count=1 --only-matching --extended-regexp "^\+\s+expected-commit:\s+([a-f0-9])+" | sed -E 's/\+\s+expected-commit:\s+([a-f0-9]+)/\1/' )

 echo "From SHA: ${from_sha}"
 echo "To SHA: ${to_sha}"

 compare_url="${base_url}${upstream_owner}/${upstream_repo}/compare/${from_sha}...${to_sha}"

 echo "Compare URL: ${compare_url}"
 # Fetch the data from the GitHub API
 data=$(curl -s "${compare_url}")

 # create a temporary file to store the PR comment body
 temp_pr_comment_body_file=$(mktemp --tmpdir=/tmp --suffix=".md" pr_comment_body_file_XXXXXX)

 # Print the total number of files changes
 echo "Total files changed: $(echo "$data" | jq --raw-output '.files | length')" | tee --append ${temp_pr_comment_body_file}

 # Print the summary of the file changes - total changes, additions, deletions
 echo "$data" | jq --raw-output '
  .files | reduce .[] as $item (
    {"changes": 0, "additions": 0, "deletions": 0};
    .changes += ($item.changes // 0) |
    .additions += ($item.additions // 0) |
    .deletions += ($item.deletions // 0)
  ) | "\nTotal changes: \(.changes)\nTotal additions: \(.additions)\nTotal deletions: \(.deletions)"' | tee --append ${temp_pr_comment_body_file}

 # Print the details of the file changes
 echo "$data" | jq --raw-output '.files[] | "\n* \(.filename)\n\tChanges: \(.changes)\n\tAdditions: \(.additions)\n\tDeletions: \(.deletions)"' | tee --append ${temp_pr_comment_body_file}

 # Print the total number of commits
 echo -e "\nTotal commits: $(echo "$data" | jq --raw-output '.total_commits')" | tee --append ${temp_pr_comment_body_file}

 echo "$data" | jq --raw-output '.commits[] | "\n* \(.commit.message | split("\n") | first)\n\n\t\(.commit.author.name) (\(.commit.author.email)) @ \(.commit.author.date)\n"' | tee --append ${temp_pr_comment_body_file}


 # print the human readable github compare URL by removing ``
 echo -e "\nGitHub compare URL: https://github.com/${upstream_owner}/${upstream_repo}/compare/${from_sha}...${to_sha}" | tee --append ${temp_pr_comment_body_file}

 gh pr comment "${pr_number}" --repo "${owner}/${repo}" --body-file ${temp_pr_comment_body_file}

 rm ${temp_pr_comment_body_file}
	#!/bin/bash -eu
	# Helpful script to summarize the commits and files changes between two git SHAs or branches or tags using the github API and updating a wolfi version update pull request with the summary.
	# This is very specific to wolfi version update PRs.
	# Usage: ./github-compare-summary-update-pr.sh <wolfi version update PR URL>
	# Example: ./github-compare-summary-update-pr.sh "https://github.com/wolfi-dev/os/pull/26617"

	base_url="https://api.github.com/repos/"

	# get the repo as the first argument
	version_bump_pull_request_url=$1

	# parse the owner, repository name and pull request number from the pull request URL
	# example pull request URL: https://github.com/wolfi-dev/os/pull/26610
	# Parse the owner, repository name, and pull request number
	owner=$(echo "${version_bump_pull_request_url}" \| awk -F'/' '{print $4}')
	repo=$(echo "${version_bump_pull_request_url}" \| awk -F'/' '{print $5}')
	pr_number=$(echo "${version_bump_pull_request_url}" \| awk -F'/' '{print $7}')

	# Output the parsed values
	echo "Pull Request: ${version_bump_pull_request_url}"
	echo "Owner: ${owner}"
	echo "Repository: ${repo}"
	echo "Pull Request Number: ${pr_number}"

	echo "https://api.github.com/repos/${owner}/${repo}/pulls/${pr_number}"

	# use the guthub cli to get the pull request details
	pull_request_data=$(gh api \
	-H "Accept: application/vnd.github+json" \
	-H "X-GitHub-Api-Version: 2022-11-28" \
	/repos/${owner}/${repo}/pulls/${pr_number})

	# get the diff URL for this pull request using the diff_url field in the pull_request_data json
	diff_url=$(echo "${pull_request_data}" \| jq --raw-output '.diff_url')
	echo "Diff URL: ${diff_url}"

	diff_data=$(gh api \
	-H "X-GitHub-Api-Version: 2022-11-28" "${diff_url}")

	# Parse the repository name from the diff data by parsing `repository:` line from the diff data
	upstream_repository_url=$(echo "${diff_data}" \| grep --max-count=1 "repository:" \| awk '{print $2}')
	# parse the owner, repository name upstream repository URL
	# example pull request URL: https://github.com/Homebrew/brew
	# Parse the owner, repository name
	upstream_owner=$(echo "${upstream_repository_url}" \| awk -F'/' '{print $4}')
	upstream_repo=$(echo "${upstream_repository_url}" \| awk -F'/' '{print $5}')

	# Output the parsed values
	echo "Upstream repository URL: ${upstream_repository_url}"
	echo "Upstream owner: ${upstream_owner}"
	echo "Upstream repository: ${upstream_repo}"

	from_sha=$(echo "${diff_data}" \| grep --max-count=1 --only-matching --extended-regexp "^\-\s+expected-commit:\s+([a-f0-9])+" \| sed -E 's/-\s+expected-commit:\s+([a-f0-9]+)/\1/' )
	to_sha=$(echo "${diff_data}" \| grep --max-count=1 --only-matching --extended-regexp "^\+\s+expected-commit:\s+([a-f0-9])+" \| sed -E 's/\+\s+expected-commit:\s+([a-f0-9]+)/\1/' )

	echo "From SHA: ${from_sha}"
	echo "To SHA: ${to_sha}"

	compare_url="${base_url}${upstream_owner}/${upstream_repo}/compare/${from_sha}...${to_sha}"

	echo "Compare URL: ${compare_url}"
	# Fetch the data from the GitHub API
	data=$(curl -s "${compare_url}")

	# create a temporary file to store the PR comment body
	temp_pr_comment_body_file=$(mktemp --tmpdir=/tmp --suffix=".md" pr_comment_body_file_XXXXXX)

	# Print the total number of files changes
	echo "Total files changed: $(echo "$data" \| jq --raw-output '.files \| length')" \| tee --append ${temp_pr_comment_body_file}

	# Print the summary of the file changes - total changes, additions, deletions
	echo "$data" \| jq --raw-output '
	.files \| reduce .[] as $item (
	{"changes": 0, "additions": 0, "deletions": 0};
	.changes += ($item.changes // 0) \|
	.additions += ($item.additions // 0) \|
	.deletions += ($item.deletions // 0)
	) \| "\nTotal changes: \(.changes)\nTotal additions: \(.additions)\nTotal deletions: \(.deletions)"' \| tee --append ${temp_pr_comment_body_file}

	# Print the details of the file changes
	echo "$data" \| jq --raw-output '.files[] \| "\n* \(.filename)\n\tChanges: \(.changes)\n\tAdditions: \(.additions)\n\tDeletions: \(.deletions)"' \| tee --append ${temp_pr_comment_body_file}

	# Print the total number of commits
	echo -e "\nTotal commits: $(echo "$data" \| jq --raw-output '.total_commits')" \| tee --append ${temp_pr_comment_body_file}

	echo "$data" \| jq --raw-output '.commits[] \| "\n* \(.commit.message \| split("\n") \| first)\n\n\t\(.commit.author.name) (\(.commit.author.email)) @ \(.commit.author.date)\n"' \| tee --append ${temp_pr_comment_body_file}


	# print the human readable github compare URL by removing ``
	echo -e "\nGitHub compare URL: https://github.com/${upstream_owner}/${upstream_repo}/compare/${from_sha}...${to_sha}" \| tee --append ${temp_pr_comment_body_file}

	gh pr comment "${pr_number}" --repo "${owner}/${repo}" --body-file ${temp_pr_comment_body_file}

	rm ${temp_pr_comment_body_file}