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import * as path from 'path';
import {
findGitRoot,
escapeForCli,
execSync,
safelyParseInt,
} from '@git-temporal/commons';
import { createProxies } from '@git-temporal/logger';
const { debug } = createProxies('git-log-scraper');
const parsedAttributes = {
id: '%H%n',
hash: '%h%n',
authorName: '%an%n',
authorEmail: '%ae%n',
relativeDate: '%cr%n',
authorDate: '%at%n',
message: '%s%n',
body: '%b',
};
export interface IGetCommitHistoryOptions {
skip?: number;
maxCount?: number;
}
export function getCommitHistory(
path: string,
options: IGetCommitHistoryOptions = { skip: 0, maxCount: 0 }
) {
const { skip, maxCount } = options;
const rawLog = fetchFileHistory(path, skip, maxCount);
const commits = parseGitLogOutput(rawLog)
.sort((a, b) => {
return b.authorDate - a.authorDate;
})
.map((c, i) => ({ ...c, index: skip + i }));
const isFile = fs.existsSync(path) && !fs.lstatSync(path).isDirectory();
return {
isFile,
commits,
skip,
maxCount,
path,
};
}
export function getCommitRange(fileName: string) {
const gitRoot = findGitRoot(fileName);
const logFlags = gitLogFlags({ follow: false });
debug('getCommitRange', { fileName, gitRoot, logFlags });
const cmdFileName = fileName === gitRoot ? '.' : fileName;
const allRevHashes = execGit(
gitRoot,
`log --pretty="format:%H" --topo-order --date=local -- ${escapeForCli(
cmdFileName
)}`
).split('\n');
// debug('allRevHashes', allRevHashes);
const firstCommitRaw = execGit(
gitRoot,
`log ${logFlags} -n1 ${allRevHashes[allRevHashes.length - 1]}`
);
const firstCommit = parseGitLogOutput(firstCommitRaw)[0];
const lastCommitRaw = execGit(
gitRoot,
`log ${logFlags} -n 1 -- ${escapeForCli(fileName)}`
);
const lastCommit = parseGitLogOutput(lastCommitRaw)[0];
const absoluteFileName = fileName.startsWith(gitRoot)
? fileName
: path.resolve(gitRoot, fileName);
const existsLocally = fs.existsSync(absoluteFileName);
const hasChanges = existsLocally && hasUncommitedChanges(gitRoot, fileName);
return {
gitRoot,
firstCommit,
lastCommit,
existsLocally,
count: allRevHashes.length,
path: fileName,
hasUncommittedChanges: hasChanges,
};
}
// Implementation
function hasUncommitedChanges(gitroot: string, fileName: string) {
const statusRaw = execGit(gitroot, `status ${fileName}`);
return statusRaw.match(/(new\sfile|modified|deleted)\:/i) !== null;
}
function fetchFileHistory(fileName: string, skip: number, maxCount: number) {
const gitRoot = findGitRoot(fileName);
const flags = gitLogFlags();
const skipFlag = skip ? ` --skip=${skip}` : '';
const countFlag = maxCount ? ` -n ${maxCount}` : '';
// use -- fileName and git log will work on deleted files and paths
return execGit(
gitRoot,
`log ${flags}${skipFlag}${countFlag} -- ${escapeForCli(fileName)}`
);
}
function gitLogFlags(options = { follow: true }) {
let format = '';
for (const attr in parsedAttributes) {
format += `${attr}:${parsedAttributes[attr]}`;
}
const follow = false && options.follow ? ' --follow' : '';
return `--pretty=\"format:${format}\" --topo-order --date=local --numstat ${follow}`;
}
function execGit(gitRoot, gitCmd) {
return execSync(`git ${gitCmd}`, { cwd: gitRoot, logFn: debug });
}
function parseGitLogOutput(output) {
const logItems = [];
const logLines = output.split(/\n\r?/);
let commitIndex = 0;
let currentlyParsingAttr = null;
let parsedValue = null;
let commitObj = null;
let totalLinesAdded = 0;
let totalLinesDeleted = 0;
// let lineNumber = 0;
const addLogItem = () => {
if (!commitObj) {
return;
}
commitObj.linesAdded = totalLinesAdded;
commitObj.linesDeleted = totalLinesDeleted;
commitObj.index = commitIndex;
logItems.push(commitObj);
totalLinesAdded = 0;
totalLinesDeleted = 0;
commitIndex += 1;
};
for (const line of logLines) {
// lineNumber += 1;
let matches = line.match(/^id\:(.*)/);
if (matches) {
currentlyParsingAttr = 'id';
addLogItem();
commitObj = {
id: matches[1],
files: [],
body: '',
message: '',
};
continue;
}
matches = line.match(/^([^\:]+):(.*)/);
if (matches) {
let attr: string;
[, attr, parsedValue] = matches;
if (attr === 'authorDate') {
parsedValue = parseInt(parsedValue, 10);
}
if (Object.keys(parsedAttributes).includes(attr)) {
currentlyParsingAttr = attr;
commitObj[currentlyParsingAttr] = parsedValue;
continue;
}
}
if ((matches = line.match(/^([\d\-]+)\s+([\d\-]+)\s+(.*)/))) {
let [linesAdded, linesDeleted, fileName] = matches.slice(1);
linesAdded = safelyParseInt(linesAdded);
linesDeleted = safelyParseInt(linesDeleted);
fileName = fileName.trim();
currentlyParsingAttr = 'files';
totalLinesAdded += linesAdded;
totalLinesDeleted += linesDeleted;
commitObj.files.push({
linesAdded,
linesDeleted,
name: fileName,
});
} else if (currentlyParsingAttr === 'body') {
commitObj.body += `<br>${line}`;
}
}
Eif (commitObj) {
addLogItem();
}
return logItems;
}
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