ci(actions): add workflow to calculate and surface PR merge rate

[tay1orjones]

This workflow calculates the merge rate of PRs for the past week in this repo. The workflow outputs the data to slack as well as an actions job summary so we can view the output within the Actions tab on github.

Changelog

New

• add metrics-merge-rate.yml

Changed

• rename the repo stats workflow to metrics-repo-stats.yml so these two workflows sit together alphabetically in the sidebar of code editors and the actions view here on github

Testing / Reviewing

I used a modified version of this locally to gather data from the last 12 weeks

#!/bin/bash

# Repository to analyze
REPO="carbon-design-system/carbon"
WEEKS=12

echo "Calculating weekly merge rates for the last $WEEKS weeks for repository $REPO"

# Loop over the past 12 weeks
for (( i=0; i<$WEEKS; i++ ))
do
  START_DATE=$(date -v-$(($i+1))w +%Y-%m-%d)
  END_DATE=$(date -v-$i\w +%Y-%m-%d)

  # Get merged PRs within the date range
  MERGED_COUNT=$(gh pr list --repo "$REPO" --state merged --search "merged:$START_DATE..$END_DATE" --limit 1000 | wc -l)
  # Get all PRs created within the date range
  TOTAL_COUNT=$(gh pr list --repo "$REPO" --state all --search "created:$START_DATE..$END_DATE" --limit 1000 | wc -l)

  if [ "$TOTAL_COUNT" -gt 0 ]; then
    MERGE_RATE=$(echo "scale=2; ($MERGED_COUNT / $TOTAL_COUNT) * 100" | bc)
    echo "Week ending $END_DATE: Merge Rate: $MERGE_RATE% (Merged PRs: $MERGED_COUNT, Total PRs: $TOTAL_COUNT)"
  else
    echo "Week ending $END_DATE: No PRs found. Merge Rate: 0% (Merged PRs: $MERGED_COUNT, Total PRs: $TOTAL_COUNT)"
  fi
done

Weekly merge rates for the last 12 weeks

Week ending on	Merge rate	Merged PRs	Total PRs created
2024-10-08	84%	27	32
2024-10-01	75%	24	32
2024-09-24	67%	25	37
2024-09-17	97%	36	37
2024-09-10	75%	24	32
2024-09-03	92%	25	27
2024-08-27	64%	24	37
2024-08-20	64%	25	39
2024-08-13	80%	21	26
2024-08-06	126%	19	15
2024-07-30	80%	17	21
2024-07-23	50%	13	26

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[netlify]

✅ Deploy Preview for v11-carbon-react ready!

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[netlify]

✅ Deploy Preview for carbon-elements ready!

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🔨 Latest commit	c0dbf3a
🔍 Latest deploy log	https://app.netlify.com/sites/carbon-elements/deploys/6706c1d3fe4e0f000840a5f8
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[netlify]

✅ Deploy Preview for v11-carbon-react ready!

Name	Link
🔨 Latest commit	c0dbf3a
🔍 Latest deploy log	https://app.netlify.com/sites/v11-carbon-react/deploys/6706c1d36d49930009400b78
😎 Deploy Preview	https://deploy-preview-17684--v11-carbon-react.netlify.app
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.19%. Comparing base (72617dd) to head (ab88c93).

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #17684   +/-   ##
=======================================
  Coverage   77.19%   77.19%           
=======================================
  Files         409      409           
  Lines       14025    14025           
  Branches     4355     4307   -48     
=======================================
  Hits        10827    10827           
  Misses       3029     3029           
  Partials      169      169           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[alisonjoseph]

nice!

[kennylam]

This is great!