add schema command

fix #7

src/changelog-schema.yml

@@ -0,0 +1,59 @@
+type: object
+additionalProperties: false
+properties:
+  project:
+    type: object
+    additionalProperties: false
+    properties:
+      homepage:
+        type: [ string, 'null' ]
+        description: url of the project's homepage
+        examples:
+          - https://github.com/yanick/app-changelord
+      name:
+        type: [ 'null', string ]
+        description: name of the project
+        examples:
+          - App::Changelord
+      ticket_url:
+        type: string
+        description: perl code that takes a ticket string (e.g. 'GH123') via the `$_` variable and turns it into a link.
+        examples:
+          - s!GH(\d+)!https://github.com/yanick/App-Changelord/issue/$1/
+          - /^\d+$/ ? "https://.../$_" : undef
+      with_stats:
+        description: if true, add git statistics when bumping the version.
+  change_types:
+    type: array
+    items:
+      type: object
+      additionalProperties: false
+      properties:
+          keywords:
+            type: array
+            items: { type: string }
+          level: { enum: [ major, minor, patch ] }
+          title: { type: string }
+  releases:
+    type: array
+    items:
+      oneOf:
+        - type: string
+        - type: object
+          additionalProperties: false
+          properties:
+            version: { type: [ 'null', string ] }
+            date: { type: ['null',string] }
+            changes: { type: 'array', items: { $ref: '#/$defs/change' } }
+$defs:
+  change:
+    oneOf:
+      - type: string
+      - type: object
+        required: [ desc ]
+        additionalProperties: false
+        properties:
+          desc: { type: string }
+          ticket: { type: [ string, 'null' ] }
+          type: { type: [ string, 'null' ] }
+          commit: { type: [ string, 'null' ] }

src/changelord.js

@@ -6,8 +6,15 @@ import { join } from 'path';
 
 import print from './command/print.js'
 import init from './command/init.js'
+import schema from './command/schema.js';
+import consola from 'consola';
+
+consola.raw = (...args) => console.log(...args);
 
 yargs(hideBin(process.argv))
+    .config({
+        consola
+    })
     .default('source', join( process.cwd(), 'CHANGELOG.yml' ))
     .describe('source', 'changelog source')
     .command({
@@ -15,4 +22,5 @@ yargs(hideBin(process.argv))
         command: '$0',
     })
     .command(init)
+    .command(schema)
     .command(print).help().parse();

src/command/schema.js

@@ -0,0 +1,16 @@
+import fs from "fs-extra";
+
+const handler = async ({consola}) => {
+  consola.raw(
+    await fs.readFile(
+      new URL("../changelog-schema.yml", import.meta.url),
+      "utf-8"
+    )
+  );
+};
+
+export default {
+  command: "schema",
+  desc: "output the changelog schema",
+  handler,
+};