Auto-generate TypeScript declaration maps

packages/plugin-ts-standard-pkg/package.json

@@ -27,6 +27,7 @@
   },
   "dependencies": {
     "@pika/types": "^0.8.1",
+    "copy-concurrently": "^1.0.5",
     "execa": "^2.0.0",
     "standard-pkg": "^0.5.0"
   },

packages/plugin-ts-standard-pkg/pkg/dist-src/index.js

@@ -1,3 +1,4 @@
+import copy from 'copy-concurrently';
 import path from 'path';
 import fs from 'fs';
 import execa from 'execa';
@@ -86,13 +87,18 @@ export function manifest(newManifest) {
     return newManifest;
 }
 export async function build({ cwd, out, options, reporter }) {
+    // Original source files are needed for declaration maps
+    const includedSrcDirectory = path.join(out, 'src/');
+    await copy(path.join(cwd, 'src/'), includedSrcDirectory);
     const additionalArgs = options.args || [];
     const result = execa(getTscBin(cwd), [
         '--outDir',
         path.join(out, 'dist-src/'),
         '-d',
         '--declarationDir',
         path.join(out, 'dist-types/'),
+        '--declarationMap',
+        'true',
         '--project',
         getTsConfigPath(options, cwd),
         '--target',
@@ -104,7 +110,7 @@ export async function build({ cwd, out, options, reporter }) {
         '--sourceMap',
         'false',
         ...additionalArgs,
-    ], { cwd });
+    ], { cwd: includedSrcDirectory });
     result.stderr.pipe(process.stderr);
     result.stdout.pipe(process.stdout);
     await result.catch(err => {

packages/plugin-ts-standard-pkg/pkg/package.json

@@ -16,6 +16,7 @@
   },
   "dependencies": {
     "@pika/types": "^0.8.1",
+    "copy-concurrently": "^1.0.5",
     "execa": "^2.0.0",
     "standard-pkg": "^0.5.0"
   },

packages/plugin-ts-standard-pkg/src/index.ts

@@ -1,3 +1,4 @@
+import copy from 'copy-concurrently';
 import path from 'path';
 import fs from 'fs';
 import execa from 'execa';
@@ -105,6 +106,10 @@ export function manifest(newManifest) {
 }
 
 export async function build({cwd, out, options, reporter}: BuilderOptions): Promise<void> {
+  // Original source files are needed for declaration maps
+  const includedSrcDirectory = path.join(out, 'src/');
+  await copy(path.join(cwd, 'src/'), includedSrcDirectory);
+
   const additionalArgs = options.args || [];
   const result = execa(
     getTscBin(cwd),
@@ -114,6 +119,8 @@ export async function build({cwd, out, options, reporter}: BuilderOptions): Prom
       '-d',
       '--declarationDir',
       path.join(out, 'dist-types/'),
+      '--declarationMap',
+      'true',
       '--project',
       getTsConfigPath(options, cwd),
       '--target',
@@ -126,7 +133,7 @@ export async function build({cwd, out, options, reporter}: BuilderOptions): Prom
       'false',
       ...additionalArgs,
     ],
-    {cwd},
+    {cwd: includedSrcDirectory},
   );
   result.stderr.pipe(process.stderr);
   result.stdout.pipe(process.stdout);