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file_metrics.js
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file_metrics.js
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const nodegit = require('nodegit'),
escomplex = require('typhonjs-escomplex'),
path = require("path"),
orm = require("./orm"),
localPath = require("path").join(__dirname, "tmp");
var Model;
function isBuggy(message) {
return /fix|bug|error/gi.test(message);
}
function getCodeMetrics(source) {
try {
const m = escomplex.analyzeModule(source);
return {
"physical_sloc": m.methodAggregate.sloc.physical,
"logical_sloc": m.methodAggregate.sloc.logical,
"cyclomatic": m.methodAggregate.cyclomatic,
"cyclomatic_density": m.methodAggregate.cyclomaticDensity,
"halstead_length": m.methodAggregate.halstead.length,
"halstead_vocabulary": m.methodAggregate.halstead.vocabulary,
"halstead_difficulty": m.methodAggregate.halstead.difficulty,
"halstead_volume": m.methodAggregate.halstead.volume,
"halstead_effort": m.methodAggregate.halstead.effort,
"halstead_bugs": m.methodAggregate.halstead.bugs,
"halstead_time": m.methodAggregate.halstead.time,
"function_count": m.methods.length,
"dependency_count": m.dependencies.length,
"maintainability": m.maintainability,
"valid": true
}
} catch(err){
console.log("Escomplex error: "+err+"\nSource: "+source);
return {
"physical_sloc": 0,
"logical_sloc": 0,
"cyclomatic": 0,
"cyclomatic_density": 0,
"halstead_length": 0,
"halstead_vocabulary": 0,
"halstead_difficulty": 0,
"halstead_volume": 0,
"halstead_effort": 0,
"halstead_bugs": 0,
"halstead_time": 0,
"function_count": 0,
"dependency_count": 0,
"maintainability": 0,
"valid": false
};
}
}
async function save(repo, history, fileName, buggy){
const commit = await repo.getCommit(history[0]['commit'].id());
const entry = await commit.getEntry(fileName);
const source = await entry.getBlob();
console.log(/test/gi.test(fileName));
console.log(fileName);
console.log("---");
const codeMetrics = getCodeMetrics(source.toString());
var authors = [];
var processMetrics = {
"total_deletions": 0,
"total_additions": 0,
"additions": null,
"deletions": null,
"time_since_bug": -1,
"commit_count": history.length,
"author_count": null,
"is_buggy": buggy
};
for(const historyEntry of history){
historyCommit = historyEntry['commit'];
authors.push(historyCommit.author().email+historyCommit.author().name);
if (historyCommit.sha() != commit.sha()) {
const delta = commit.timeMs() - historyCommit.timeMs();
if (isBuggy(historyCommit.message()) && (delta < processMetrics["time_since_bug"] || processMetrics["time_since_bug"] < 0 )){
processMetrics["time_since_bug"] = delta;
}
}
const diffList = await commit.getDiff();
for(const diff of diffList){
const patches = await diff.patches();
for(const patch of patches){
// even though history is for single file, commit still gives us all files so we must check first
if (patch.newFile().path() == fileName || patch.oldFile().path == fileName) {
for (var key of ["total_deletions", "total_additions"]) {
processMetrics[key] += patch.lineStats()[key];
}
lineStats = patch.lineStats()
processMetrics["total_additions"] += lineStats["total_additions"];
processMetrics["total_deletions"] += lineStats["total_deletions"];
if (processMetrics["additions"] == null) { // set only once
processMetrics["additions"] = lineStats["total_additions"];
}
if (processMetrics["deletions"] == null) { // set only once
processMetrics["deletions"] = lineStats["total_deletions"];
}
}
}
}
}
processMetrics["author_count"] = [...new Set(authors)].length;
const metrics = {
...codeMetrics,
...processMetrics,
...{ "filename": fileName+"@"+history[0]['commit'].id() }
}
return Model.create(metrics);
}
async function saveMetrics(cloneURL) {
Model = await orm.getCollection();
console.log("Cloning repo: "+cloneURL);
const repo = await nodegit.Clone(cloneURL, localPath, {}).catch(function (){
console.log("Error, now trying local!");
return nodegit.Repository.open(localPath);
});
firstCommit = await repo.getMasterCommit();
const history = firstCommit.history(nodegit.Revwalk.SORT.TIME);
history.on("end", async function (commits) {
for(const commit of commits){
if (isBuggy(commit.message())){
//see which files were affected by this commit
const diffList = await commit.getDiff();
for(const diff of diffList){
const patches = await diff.patches();
for(const patch of patches){
const fileName = patch.newFile().path();
// let's ignore all non-js files, new additions and deletions
if (/.*\.js$/gi.test(fileName) && !(/spec\/|test\//gi.test(fileName)) && !patch.isDeleted() && !patch.isAdded()) {
var walker = repo.createRevWalk();
walker.push(commit.sha());
walker.sorting(nodegit.Revwalk.SORT.Time);
const historyCommits = await walker.fileHistoryWalk(fileName, 10000);
save(repo, historyCommits, fileName, false); //save good mertics
save(repo, historyCommits.slice(1), fileName, true); // save buggy metrics
}
}
}
}
}
});
history.start();
}
module.exports = { saveMetrics, save };