add print command

fix #6

CHANGELOG.yml

@@ -1,12 +1,16 @@
 project:
-  name: null
-  homepage: null
+  name: changelord
+  homepage: https://git.babyl.ca/yanick/changelord.js
   with_stats: true
   ticket_url: null
 releases:
   - version: NEXT
-    changes: []
+    changes: 
+      - port the Perl changelord to JavaScript.
 change_types:
+  - title: ''
+    level: minor
+    keywords: ['']
   - title: Features
     level: minor
     keywords:

Taskfile.yaml

@@ -0,0 +1,6 @@
+# https://taskfile.dev
+version: '3'
+
+tasks:
+  test: vitest run src 
+  test:dev: vitest src

package.json

@@ -18,10 +18,13 @@
   "dependencies": {
     "consola": "^3.1.0",
     "fs-extra": "^11.1.1",
+    "markdown-utils": "^1.0.0",
+    "remeda": "^1.14.0",
     "yaml": "^2.2.2",
     "yargs": "^17.7.2"
   },
   "devDependencies": {
-    "prettier": "^2.8.8"
+    "prettier": "^2.8.8",
+    "vitest": "^0.31.0"
   }
 }

prettier.config.mjs

@@ -0,0 +1,9 @@
+export default {
+  endOfLine: "lf",
+  semi: true,
+  singleQuote: false,
+  tabWidth: 2,
+  trailingComma: "es5",
+  bracketSpacing: true,
+  proseWrap: "always",
+};

src/changelord.js

@@ -3,6 +3,8 @@
 import { hideBin } from 'yargs/helpers';
 import yargs from 'yargs';
 import { join } from 'path';
+import yaml from 'yaml';
+import fs from 'fs-extra';
 
 import print from './command/print.js'
 import init from './command/init.js'
@@ -11,9 +13,10 @@ import consola from 'consola';
 
 consola.raw = (...args) => console.log(...args);
 
+
 yargs(hideBin(process.argv))
     .config({
-        consola
+        consola,
     })
     .default('source', join( process.cwd(), 'CHANGELOG.yml' ))
     .describe('source', 'changelog source')

src/command/init.js

@@ -1,25 +1,27 @@
-import fs from 'fs-extra';
-import { consola } from 'consola';
-import { stringify } from 'yaml';
+import fs from "fs-extra";
+import { consola } from "consola";
+import { stringify } from "yaml";
 
 const change_types = [
-            { title: 'Features'  , level: 'minor', keywords: [ 'feat' ] } ,
-            { title : 'Bug fixes' , level : 'patch', keywords : [ 'fix' ]  },
-            { title : 'Package maintenance' , level : 'patch', keywords : [ 'chore', 'maint', 'refactor' ]  },
-            { title : 'Statistics' , level : 'patch', keywords : [ 'stats' ]  },
+  { title: "", level: "minor", keywords: [""] },
+  { title: "Features", level: "minor", keywords: ["feat"] },
+  { title: "Bug fixes", level: "patch", keywords: ["fix"] },
+  {
+    title: "Package maintenance",
+    level: "patch",
+    keywords: ["chore", "maint", "refactor"],
+  },
+  { title: "Statistics", level: "patch", keywords: ["stats"] },
 ];
 
-
-const base_changelog = {
+export const base_changelog = {
   project: {
     name: null,
     homepage: null,
     with_stats: true,
     ticket_url: null,
   },
-    releases: [
-        { version: 'NEXT', changes: [] }
-    ],
+  releases: [{ version: "NEXT", changes: [] }],
   change_types,
 };
 
@@ -33,18 +35,18 @@ const handler = async (config) => {
 
   await fs.writeFile(config.source, stringify(base_changelog));
 
-    consola.success('done!');
-
+  consola.success("done!");
 };
 
 export default {
-    command: 'init',
-    desc :  'initialize new changelog source file',
+  command: "init",
+  desc: "initialize new changelog source file",
   builder: (yargs) => {
-        yargs.boolean('json')
-        .boolean('next')
-        .default('json',false)
-        .default('next',true);
+    yargs
+      .boolean("json")
+      .boolean("next")
+      .default("json", false)
+      .default("next", true);
   },
   handler,
-}
+};

src/command/print.js

@@ -1,16 +1,131 @@
+import * as R from 'remeda';
+import fs from 'fs-extra';
+import yaml from 'yaml';
+import mkd from 'markdown-utils';
+
+const render_header = (source ) => {
+    let header = '# Changelog';
+    
+    let name = source.project?.name
+
+    const links = {};
+
+    if( source?.project?.homepage) {
+        links.homepage = source?.project?.homepage;
+        name = `[${name}][homepage]`;
+    }
+
+    if(name) header += ` for ${name}`;
+
+    return { header, links }
+
+};
+
+function render_links(links) {
+
+    return Object.entries(links).map(
+        ([name,url]) => `    [${name}]: ${url}`
+    ).join( "\n")
+
+}
+
+const render_change = (config,source)=>(change) => {
+    let body = change.desc;
+    let links = {};
+
+    return {
+        body, links
+    }
+};
+
+export const render_release = (config,source) => ( release ) => {
+    let links = {};
+
+    if( typeof release === 'string') return {
+        body: release,
+        links
+    };
+
+    if(release.version === 'NEXT' && !config.next) return {
+        body: '',
+        links,
+    };
+
+    let body = "## " + release.version;
+
+    if( release.date) {
+        body += " " + release.date;
+    }
+
+    body += "\n\n";
+
+    const type_map = Object.fromEntries(source.change_types.flatMap(
+        entry => entry.keywords.map( k => [ k, entry ])
+    ));
+
+    const changes = release.changes.map( change => typeof change === 'string'? { desc: change, type: '' } : change );
+
+    const unknown = R.uniq( changes.map(R.prop('type')).map(
+        t => t ?? ''
+    ).filter( type => !type_map[type]));
+
+    if( unknown.length ) {
+        throw new Error(
+            "unknown change types encountered: " + unknown.map(t => `'${t}'`).join(', ')
+        );
+    }
+
+    for ( const change_type of source.change_types ) {
+        const type_changes = changes.filter(
+            ({type}) => change_type.keywords.includes(type)
+        );
+
+        if( type_changes.length === 0) continue;
+
+        if( change_type.title )
+            body += mkd.h2( change_type.title)  + "\n\n";
+
+        for( const c of type_changes ) {
+            const res = render_change(config,source)(c);
+            body += mkd.li(res.body,1)+"\n";
+            links = { ...links, ...res.links};
+        }
+    }
+
+    return { body, links };
+};
+
+const handler = async (config) => {
+    const source = await fs.readFile(config.source,'utf-8').then(yaml.parse);
+
+    let output = '';
+
+    let {header,links} = render_header(source);
+
+    output += header + "\n\n";
+
+    for ( const res of source.releases.map( render_release(config,source) )) {
+        output += res.body + "\n\n";
+        links = {...links,...res.links};
+    }
+
+    output += "\n\n\n\n" + render_links(links);
+
+    config.consola.raw(output);
+
 
-const handler = (...args) => {
-    console.log('hi!',args);
 };
 
 export default {
     command: 'print',
     desc :  'render the changelog',
     builder: (yargs) => {
-        yargs.boolean('json')
+        yargs
+            //.boolean('json')
         .boolean('next')
-        .default('json',false)
+//        .default('json',false)
         .default('next',true);
     },
     handler,
 }
+

src/command/print.test.js

@@ -0,0 +1,22 @@
+import { test, expect, vi } from 'vitest';
+import { render_release } from './print.js';
+import { base_changelog } from './init.js';
+
+test( 'render_release a string', () => {
+    const {body} = render_release({})("as is");
+    expect(body).toEqual('as is');
+});
+
+test( 'render_release', () => {
+    const consola = { error: vi.fn() };
+    const res= render_release({consola},base_changelog)({
+        version: '1.2.3',
+        date: 'today',
+        changes: [
+            "this",
+            "that",
+        ]
+    });
+    expect(res.body).toContain('# 1.2.3 today');
+    expect(res.body).toContain('* this');
+});