@ehmicky/dev-tasks/build/src/tasks/release/changelog/manual.js

Automated development tasks for my own projects

import{readFile}from"node:fs/promises";

import{pathExists}from"path-exists";
import{inc}from"semver";

import{prettierReleaseNotes}from"../../check/prettier.js";


export const printManualChangelog=async(contents,increment)=>{
const lines=contents.split("\n");
await checkFirstLine(lines,increment);
const linesA=excludePreviousVersions(lines);
const contentsA=linesA.join("\n");
const changelog=await prettierReleaseNotes(contentsA);

console.log(changelog.trim())
};


const checkFirstLine=async(lines,increment)=>{
const currentVersion=await getCurrentVersion();
const newVersion=getNewVersion(currentVersion,increment);
const firstVersion=parseVersionLine(lines[0]);

if(firstVersion!==newVersion){
throw new TypeError(`CHANGELOG.md should start with ${newVersion}`)
}

if(lines[1]!==""){
throw new TypeError("CHANGELOG.md second line should be empty.")
}
};


const getCurrentVersion=async()=>{
if(!(await pathExists(PACKAGE_JSON))){
throw new TypeError(`Missing ${PACKAGE_JSON}.`)
}

const packageJsonContents=await readFile(PACKAGE_JSON,"utf8");
const{version}=JSON.parse(packageJsonContents);
return version
};

const PACKAGE_JSON="package.json";


const getNewVersion=(currentVersion,increment)=>{
if(!VALID_INCREMENTS.has(increment)){
throw new TypeError(`Invalid increment parameter: ${increment}`)
}

return inc(currentVersion,increment)
};

const VALID_INCREMENTS=new Set(["major","minor","patch"]);


const excludePreviousVersions=(lines)=>{
const linesA=lines.slice(2);
const nextVersionIndex=linesA.findIndex(isVersionLine);
return nextVersionIndex===-1?linesA:linesA.slice(0,nextVersionIndex)
};

const isVersionLine=(line)=>parseVersionLine(line)!==undefined;

const parseVersionLine=(line)=>{
const result=VERSION_LINE_REGEXP.exec(line);
return result===null?undefined:result[1]
};


const VERSION_LINE_REGEXP=/^# (\d+\.\d+\.\d+)$/u;