npm-git-log.js

npm-git-log-module.js

  const {spawnSync} = require("child_process");
const path = require("path");

const gitLog = function(cwd, obj, magicKey) {
  magicKey = "^^" || magicKey;
  cwd = cwd || ".";
  const args = ["log"];

  let logFormat = {
    commit: "%H",
    abbreviated_commit: "%h",
    date: "%cD",
    committer: "%cn",
    author_date: "%aD",
    author: "%an"
  };

  if (obj) {
    if (obj.hasOwnProperty("nCommit")) {
      args.push(`-${obj.nCommit}`);
    }

    if (obj.hasOwnProperty("logFormat")) {
      logFormat = obj.logFormat;
    }
  }
  let strLogFormat = "{%n";
  for (const prop in logFormat) {
    if (typeof logFormat[prop] === "string") {
      strLogFormat += `  "${prop}": "${logFormat[prop]}",%n`;
    }
  }
  strLogFormat = strLogFormat.slice(0, strLogFormat.length - 3) + `%n}${magicKey}`;

  args.push(`--pretty=format:${strLogFormat}`);

  args.push("HEAD");
  if (obj) {
    if (obj.hasOwnProperty("fileList")) {
      args.push("--");
      obj.fileList.forEach((x) => {
        args.push(x);
      });
    }
  }

  const out = spawnSync("git", args, {
    cwd: path.resolve(process.cwd(), cwd),
    encoding: "utf8"
  });
  const commitInfoArray = out.stdout.split(magicKey).filter((val) => val.length > 0);

  let commitInfo = "[\n";
  commitInfoArray.forEach((val, i) => {
    if (i < commitInfoArray.length - 1) {
      commitInfo += `${val},`;
    } else {
      commitInfo += `${val}\n]`;
    }
  });
  return JSON.parse(commitInfo);
};

module.exports = {
  gitLog: gitLog
};

npm-git-log.js

const { execSync } = require('child_process');

function gitLog(cwd, obj, magicKey) {
    magicKey = '^^'||magicKey;
    cwd = cwd||'.';

    let logFormat = {
        commit: "%H",
        abbreviated_commit: "%h",
        date: "%cD",
        committer: "%cn",
        author_date: "%aD",
        author: "%an"
    };
    let nCommit = "";
    let fileList = "";

    if (obj) {
        if (obj.hasOwnProperty('logFormat')) {
            logFormat = obj.logFormat;
        }
        if (obj.hasOwnProperty('nCommit')) {
            nCommit = `-n ${obj.nCommit}`;
        }
        if (obj.hasOwnProperty('fileList')) {
            const fileList = " " + obj.fileList.join(" ");
        }
    }

    let strLogFormat = '{%n';
    for (const prop in logFormat) {
        strLogFormat += `  \\"${prop}\\": \\"${logFormat[prop]}\\",%n`;
    }
    strLogFormat = strLogFormat.slice(0, strLogFormat.length-3) + `%n}${magicKey}`;

    const cmd = `git log ${nCommit} --pretty=format:"${strLogFormat}"${fileList}`
    let stdout = execSync(cmd, {cwd: cwd, encoding: "utf8"});
    commitInfoArray = stdout.split(magicKey).filter((val) => val.length > 0);

    let commitInfo = '[\n';
    commitInfoArray.forEach((val,i) => {
        if (i < commitInfoArray.length-1) {
            commitInfo += `${val},`;
        } else {
            commitInfo += `${val}\n]`;
        }
    })

    return JSON.parse(commitInfo);
}

const commitInfo = gitLog('../', {fileList: ['mydata.json']});
console.log(commitInfo)