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const { formatDistance } = require('date-fns');
const fs = require('fs');
const git = require("nodegit");
function addRepoDirSuffix(repo_name)
{
if(!repo_name.endsWith(".git")) {
return repo_name + ".git";
}
return repo_name;
}
async function getLog(base_dir, repo_name)
{
const repo = await git.Repository.openBare(`${base_dir}/${repo_name}`)
const walker = git.Revwalk.create(repo);
walker.pushHead();
const raw_commits = await walker.getCommits();
const commits = Promise.all(raw_commits.map(async commit => ({
commit: commit.sha(),
author_full: commit.author().toString(),
author_name: commit.author().name(),
author_email: commit.author().email(),
date: commit.date(),
message: commit.message().replace(/\n/g, ""),
insertions: (await (await commit.getDiff())[0].getStats()).insertions(),
deletions: (await (await commit.getDiff())[0].getStats()).deletions(),
files_changed: (await (await commit.getDiff())[0].getStats()).filesChanged()
})));
return await commits;
}
async function getTimeSinceLatestCommit(base_dir, repo_name)
{
const repo = await git.Repository.openBare(`${base_dir}/${repo_name}`)
const master_commit = await repo.getMasterCommit();
return formatDistance(new Date(), master_commit.date());
}
function getRepoFile(base_dir, repo, file)
{
return new Promise(resolve =>
{
fs.readFile(`${base_dir}/${repo}/${file}`, async (err, content) =>
{
if(!err) {
resolve(content.toString().replace(/\n/g, ""));
return;
}
resolve("");
});
});
}
function getRepos(base_dir)
{
return new Promise((resolve) =>
{
fs.readdir(base_dir, (err, dir_content) =>
{
if(err) {
resolve({ "error": err });
return;
}
dir_content.filter(repo => repo.endsWith(".git")).reduce((acc, repo) =>
{
return acc.then((repos) =>
{
return getRepoFile(base_dir, repo, "description").then((description) =>
{
return getRepoFile(base_dir, repo, "owner").then((owner) =>
{
return getTimeSinceLatestCommit(base_dir, repo).then((last_commit_date) =>
{
repos[repo.slice(0, -4)] = { "description": description, "owner": owner, "last_updated": last_commit_date };
return repos;
});
});
});
});
}, Promise.resolve({})).then((repos) =>
{
resolve(repos);
});
});
});
}
function parseHunkAddDel(hunk)
{
let new_lines = [];
let deleted_lines = [];
hunk.forEach((line, index) =>
{
if(line.charAt(0) === '+') {
hunk[index] = line.slice(1);
new_lines.push(index);
}
else if(line.charAt(0) === '-') {
hunk[index] = line.slice(1);
deleted_lines.push(index);
}
});
return { new: new_lines, deleted: deleted_lines, hunk: hunk.join("\n") };
}
async function getCommit(base_dir, repo_name, commit_oid)
{
repo_name = addRepoDirSuffix(repo_name);
const repo = await git.Repository.openBare(`${base_dir}/${repo_name}`)
const commit = await repo.getCommit(commit_oid);
const diff = (await commit.getDiff())[0];
const all_patches = (await diff.toBuf(1)).split('\n');
// Get the count of lines for all of patches's headers
const patch_headers = (await diff.toBuf(2)).split('\n');
const patch_header_data = await patch_headers.reduce((acc, line, index) =>
{
return acc.then((arr) =>
{
if(/^diff --git/.test(line)) {
arr[0].push(all_patches.indexOf(line));
if(arr[2] != undefined) {
arr[1].push(patch_headers.slice(arr[2], index).length);
}
arr[2] = index;
}
else if(index == patch_headers.length - 1 && arr[2] != undefined) {
arr[1].push(patch_headers.slice(arr[2], index).length);
}
return arr;
});
}, Promise.resolve([ [], [], undefined ]));
console.log(patch_header_data);
const patches = await diff.patches();
const parsed_patches = patches.reduce((acc, patch, patch_index) =>
{
return acc.then((arr) =>
{
return patch.hunks().then((hunks) =>
{
console.log("\n" + patch.newFile().path());
const patch_start = patch_header_data[0][patch_index] + patch_header_data[1][patch_index];
const patch_end = (patch_header_data[0][patch_index + 1] !== undefined) ? patch_header_data[0][patch_index + 1] : all_patches.length - 1;
const patch_content = all_patches.slice(patch_start, patch_end);
const line_lengths = patch_content.map((line) => line.length).reduce((acc, length) => acc + length);
if(patch_content.length > 5000 || line_lengths > 5000) {
console.log("Too large!");
arr.push({
from: patch.oldFile().path(),
to: patch.newFile().path(),
additions: patch.lineStats()["total_additions"],
deletions: patch.lineStats()["total_deletions"],
too_large: true,
hunks: null
});
return arr;
}
// Go through all of the patch's hunks
// Patches are split into parts of where in the file the change is made. Those parts are called hunks.
return hunks.reduce((acc, hunk, hunk_index) =>
{
return acc.then((hunks_data) =>
{
const hunk_header = hunk.header();
const hunk_header_index = patch_content.indexOf(hunk_header.replace(/\n/g, ""));
if(hunks_data[0] !== undefined) {
const prev_hunk = hunks[hunk_index - 1];
hunks_data[1].push(Object.assign({
new_start: prev_hunk.newStart(),
new_lines: prev_hunk.newLines(),
old_start: prev_hunk.oldStart(),
old_lines: prev_hunk.oldLines(),
}, parseHunkAddDel(patch_content.slice(hunks_data[0], hunk_header_index))));
hunks_data[2] = hunks_data + patch_content.slice(hunks_data[0], hunk_header_index).length;
}
hunks_data[0] = hunk_header_index;
return hunks_data;
});
}, Promise.resolve([ undefined, [], 0 ])).then((hunks_data) =>
{
const prev_hunk = hunks[hunks.length - 1];
hunks_data[1].push(Object.assign({
new_start: prev_hunk.newStart(),
new_lines: prev_hunk.newLines(),
old_start: prev_hunk.oldStart(),
old_lines: prev_hunk.oldLines(),
}, parseHunkAddDel(patch_content.slice(hunks_data[0], patch_end))));
arr.push({
from: patch.oldFile().path(),
to: patch.isDeleted() ? "/dev/null" : patch.newFile().path(),
additions: patch.lineStats()["total_additions"],
deletions: patch.lineStats()["total_deletions"],
too_large: false,
hunks: hunks_data[1]
});
return arr;
});
});
});
}, Promise.resolve([]));
return {
hash: commit.sha(),
author: commit.author().toString(),
message: commit.message(),
date: commit.date(),
patches: await parsed_patches
};
}
module.exports.getLog = getLog;
module.exports.getRepos = getRepos;
module.exports.getRepoFile = getRepoFile;
module.exports.getCommit = getCommit;
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