From bf48097bdf9bb6846d3c5a819ce97d8026bfcd1f Mon Sep 17 00:00:00 2001
From: Yuku Kotani <yukukotani@gmail.com>
Date: Sat, 3 Aug 2024 13:30:04 +0900
Subject: [PATCH 1/2] add sourceRoot option

---
 schema.json               |  3 +++
 src/cli-main.ts           |  4 ++++
 src/esbuild/index.ts      |  1 +
 src/options.ts            |  1 +
 src/plugins/swc-target.ts |  1 +
 test/index.test.ts        | 18 ++++++++++++++++++
 6 files changed, 28 insertions(+)

diff --git a/schema.json b/schema.json
index a033bf762..b90984b63 100644
--- a/schema.json
+++ b/schema.json
@@ -224,6 +224,9 @@
             }
           ]
         },
+        "sourceRoot": {
+          "type": "string"
+        },
         "noExternal": {
           "type": "array",
           "items": {
diff --git a/src/cli-main.ts b/src/cli-main.ts
index 070236e1e..4841cce08 100644
--- a/src/cli-main.ts
+++ b/src/cli-main.ts
@@ -46,6 +46,10 @@ export async function main(options: Options = {}) {
       '--sourcemap [inline]',
       'Generate external sourcemap, or inline source: --sourcemap inline',
     )
+    .option(
+      '--sourceRoot [path]',
+      'Specify the location where a debugger should locate TypeScript files instead of relative source locations',
+    )
     .option(
       '--watch [path]',
       'Watch mode, if path is not specified, it watches the current folder ".". Repeat "--watch" for more than one path',
diff --git a/src/esbuild/index.ts b/src/esbuild/index.ts
index 9b07f24e9..6a58e9193 100644
--- a/src/esbuild/index.ts
+++ b/src/esbuild/index.ts
@@ -169,6 +169,7 @@ export async function runEsbuild(
       jsxFactory: options.jsxFactory,
       jsxFragment: options.jsxFragment,
       sourcemap: options.sourcemap ? 'external' : false,
+      sourceRoot: options.sourceRoot,
       target: options.target,
       banner,
       footer,
diff --git a/src/options.ts b/src/options.ts
index 68c8d3ff4..1db309910 100644
--- a/src/options.ts
+++ b/src/options.ts
@@ -137,6 +137,7 @@ export type Options = {
   dts?: boolean | string | DtsConfig
   experimentalDts?: boolean | string | ExperimentalDtsConfig
   sourcemap?: boolean | 'inline'
+  sourceRoot?: string
   /** Always bundle modules matching given patterns */
   noExternal?: (string | RegExp)[]
   /** Don't bundle these modules */
diff --git a/src/plugins/swc-target.ts b/src/plugins/swc-target.ts
index 7ec4b5c45..c0dee4356 100644
--- a/src/plugins/swc-target.ts
+++ b/src/plugins/swc-target.ts
@@ -38,6 +38,7 @@ export const swcTarget = (): Plugin => {
       const result = await swc.transform(code, {
         filename: info.path,
         sourceMaps: this.options.sourcemap,
+        sourceRoot: this.options.sourceRoot,
         minify: Boolean(this.options.minify),
         jsc: {
           target,
diff --git a/test/index.test.ts b/test/index.test.ts
index 5b07554fe..4d2d239c5 100644
--- a/test/index.test.ts
+++ b/test/index.test.ts
@@ -901,3 +901,21 @@ test('generate sourcemap with --treeshake', async () => {
       }),
   )
 })
+
+test('include sourceRoot in sourcemap with --sourceRoot', async () => {
+  const { getFileContent } = await run(
+    getTestName(),
+    {
+      'input.ts': `export const hi = 'hi'`,
+    },
+    {
+      entry: ['input.ts'],
+      flags: ['--sourcemap', '--sourceRoot=/'],
+    },
+  )
+  const sourceMap = await getFileContent(`dist/input.js.map`).then(
+    (rawContent) => JSON.parse(rawContent),
+  )
+
+  expect(sourceMap.sourceRoot).toBe('/')
+})

From 5402ba0fe7f91bda809e8fb2972a93c072ebc45a Mon Sep 17 00:00:00 2001
From: Yuku Kotani <yukukotani@gmail.com>
Date: Tue, 17 Sep 2024 15:13:17 +0900
Subject: [PATCH 2/2] Apply suggestions from code review

Co-authored-by: ocavue <ocavue@users.noreply.github.com>
---
 schema.json     | 3 ++-
 src/cli-main.ts | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/schema.json b/schema.json
index b90984b63..d7edb6989 100644
--- a/schema.json
+++ b/schema.json
@@ -225,7 +225,8 @@
           ]
         },
         "sourceRoot": {
-          "type": "string"
+          "type": "string",
+          "description": "The value of the `sourceRoot` field in the source map"
         },
         "noExternal": {
           "type": "array",
diff --git a/src/cli-main.ts b/src/cli-main.ts
index 4841cce08..d3916dfdc 100644
--- a/src/cli-main.ts
+++ b/src/cli-main.ts
@@ -47,7 +47,7 @@ export async function main(options: Options = {}) {
       'Generate external sourcemap, or inline source: --sourcemap inline',
     )
     .option(
-      '--sourceRoot [path]',
+      '--source-root [path]',
       'Specify the location where a debugger should locate TypeScript files instead of relative source locations',
     )
     .option(