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Update activity score calculation algorithm #341

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Merged
merged 4 commits into from
Oct 4, 2021
Merged

Update activity score calculation algorithm #341

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d1722fa
update score calculation algorithm
3cpt Aug 12, 2021
27f83a0
improve code reading
3cpt Aug 16, 2021
48ec7bf
update algorithm
3cpt Aug 30, 2021
48c382d
revert `1+` removed
3cpt Sep 28, 2021
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21 changes: 14 additions & 7 deletions patterns/2-structured/repository-activity-score.md
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Original file line number Diff line number Diff line change
Expand Up @@ -58,17 +58,23 @@ function calculateScore(repo) {
// initial score is 50 to give active repos with low GitHub KPIs (forks, watchers, stars) a better starting point
let iScore = 50;
// weighting: forks and watches count most, then stars, add some little score for open issues, too
iScore += repo["forks_count"] * 5 + repo["watchers_count"] + repo["stargazers_count"] / 3 + repo["open_issues_count"] / 5;
let iDaysSinceLastUpdate = (new Date().getTime() - new Date(repo.updated_at).getTime()) / 1000 / 86400;
iScore += repo.forks_count * 5;
iScore += (repo.subscribers_count ? repo.subscribers_count : 0);
iScore += repo.stargazers_count / 3;
iScore += repo.open_issues_count / 5;

// updated in last 3 months: adds a bonus multiplier between 0..1 to overall score (1 = updated today, 0 = updated more than 100 days ago)
iScore = iScore * (1 + (100 - Math.min(iDaysSinceLastUpdate, 100)) / 100);
let iDaysSinceLastUpdate = (new Date().getTime() - new Date(repo.updated_at).getTime()) / 1000 / 86400;
iScore = iScore * ((1 + (100 - Math.min(iDaysSinceLastUpdate, 100))) / 100);

// evaluate participation stats for the previous 3 months
repo._InnerSourceMetadata = repo._InnerSourceMetadata || {};
if (repo._InnerSourceMetadata.participation) {
// average commits: adds a bonus multiplier between 0..1 to overall score (1 = >10 commits per week, 0 = less than 3 commits per week)
let iAverageCommitsPerWeek = repo._InnerSourceMetadata.participation.slice(repo._InnerSourceMetadata.participation - 13).reduce((a, b) => a + b) / 13;
iScore = iScore * (1 + (Math.min(Math.max(iAverageCommitsPerWeek - 3, 0), 7)) / 7);
let iAverageCommitsPerWeek = repo._InnerSourceMetadata.participation.slice(repo._InnerSourceMetadata.participation.length - 13).reduce((a, b) => a + b) / 13;
iScore = iScore * ((1 + (Math.min(Math.max(iAverageCommitsPerWeek - 3, 0), 7))) / 7);
}

// boost calculation:
// all repositories updated in the previous year will receive a boost of maximum 1000 declining by days since last update
let iBoost = (1000 - Math.min(iDaysSinceLastUpdate, 365) * 2.74);
Expand All @@ -78,9 +84,9 @@ function calculateScore(repo) {
// add boost to score
iScore += iBoost;
// give projects with a meaningful description a static boost of 50
iScore += (repo["_InnerSourceMetadata"]["description"].length > 30 || repo["_InnerSourceMetadata"] && repo["_InnerSourceMetadata"]["motivation"].length > 30 ? 50 : 0);
iScore += (repo.description?.length > 30 || repo._InnerSourceMetadata.motivation?.length > 30 ? 50 : 0);
// give projects with contribution guidelines (CONTRIBUTING.md) file a static boost of 100
iScore += (repo["_InnerSourceMetadata"] && repo["_InnerSourceMetadata"]["guidelines"] ? 100 : 0);
iScore += (repo._InnerSourceMetadata.guidelines ? 100 : 0);
// build in a logarithmic scale for very active projects (open ended but stabilizing around 5000)
if (iScore > 3000) {
iScore = 3000 + Math.log(iScore) * 100;
Expand All @@ -89,6 +95,7 @@ function calculateScore(repo) {
iScore = Math.round(iScore - 50);
// add score to metadata on the fly
repo._InnerSourceMetadata.score = iScore;

return iScore;
}
```
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