From c77ae60124bbc6c00644a8b935a9189b687629d4 Mon Sep 17 00:00:00 2001
From: ryan <tianliang@innotechx.com>
Date: Wed, 24 Jun 2020 13:20:57 +0800
Subject: [PATCH] feat: add compose-source-maps.js create sourcemap

---
 src/script/command-executor.ts | 108 +++++++++++++++++++++++----------
 1 file changed, 76 insertions(+), 32 deletions(-)

diff --git a/src/script/command-executor.ts b/src/script/command-executor.ts
index 7ecb5827..afb6fa6c 100644
--- a/src/script/command-executor.ts
+++ b/src/script/command-executor.ts
@@ -2125,48 +2125,78 @@ export function runHermesEmitBinaryCommand(
                 );
             }
 
-            const copyFiles = [];
             // Copy HBC bundle to overwrite JS bundle
             const source = path.join(outputFolder, bundleName + ".hbc");
             const destination = path.join(outputFolder, bundleName);
-            
-            copyFiles.push([source, destination]);
-            if (sourcemapOutput) {
-                const sourceMap = path.join(outputFolder, bundleName + ".hbc" + ".map");
-                if (fs.existsSync(sourceMap)) {
-                    copyFiles.push([sourceMap, sourcemapOutput]);
+
+            fs.copyFile(source, destination, (err) => {
+                if (err) {
+                    console.error(err);
+                    reject(
+                        new Error(
+                            `Copying file ${source} to ${destination} failed. "hermes" previously exited with code ${exitCode}.`
+                        )
+                    );
                 }
-            }
+                fs.unlink(source, (err) => {
+                    if (err) {
+                        console.error(err);
+                        reject(err);
+                    }
+
+                    resolve(null as void);
+                });
+            });
+        });
+    }).then(() => {
+        const composeSourceMapsPath = getComposeSourceMapsPath();
+        if (sourcemapOutput && !composeSourceMapsPath) {
+            throw new Error('react-native compose-source-maps.js scripts is not found');
+        }
+
+        const jsCompilerSourceMapFile = path.join(outputFolder, bundleName + ".hbc" + ".map");
+        if (!fs.existsSync(jsCompilerSourceMapFile)) {
+            throw new Error('sourcemap file is not found');
+        }
+
+        return new Promise((resolve, reject) => {
+            const composeSourceMapsArgs = [
+                sourcemapOutput,
+                jsCompilerSourceMapFile,
+                "-o",
+                sourcemapOutput,
+            ];
+
+            // https://github.com/facebook/react-native/blob/master/react.gradle#L211
+            // index.android.bundle.packager.map + index.android.bundle.compiler.map = index.android.bundle.map
+            const composeSourceMapsProcess = spawn(composeSourceMapsPath, composeSourceMapsArgs);
+            log(`${composeSourceMapsPath} ${composeSourceMapsArgs.join(" ")}`);
 
-            const recursiveCopyFile = (files) => {
-                const [file, target] = files.shift();
-                log(`cp ${file} to ${target}`);
-                fs.copyFile(file, target, (err) => {
+            composeSourceMapsProcess.stdout.on("data", (data: Buffer) => {
+                log(data.toString().trim());
+            });
+    
+            composeSourceMapsProcess.stderr.on("data", (data: Buffer) => {
+                console.error(data.toString().trim());
+            });
+    
+            composeSourceMapsProcess.on("close", (exitCode: number) => {
+                if (exitCode) {
+                    reject(
+                        new Error(`"compose-source-maps" command exited with code ${exitCode}.`)
+                    );
+                }
+
+                // Delete the HBC sourceMap, otherwise it will be included in 'code-push' bundle as well
+                fs.unlink(jsCompilerSourceMapFile, (err) => {
                     if (err) {
                         console.error(err);
-                        reject(
-                            new Error(
-                                `Copying file ${file} to ${target} failed. "hermes" previously exited with code ${exitCode}.`
-                            )
-                        );
-                        return;
+                        reject(err);
                     }
-                    fs.unlink(file, (err) => {
-                        if (err) {
-                            console.error(err);
-                            reject(err);
-                            return;
-                        }
 
-                        if (files.length === 0) {
-                            resolve(null as void);
-                        } else {
-                            recursiveCopyFile(files);
-                        }
-                    });
+                    resolve(null);
                 });
-            }
-            recursiveCopyFile(copyFiles);
+            });
         });
     });
 }
@@ -2242,6 +2272,20 @@ function getHermesCommand(): string {
     return path.join("node_modules", "hermesvm", getHermesOSBin(), "hermes");
 }
 
+function getComposeSourceMapsPath(): string {
+    // detect if compose-source-maps.js script exists
+    const composeSourceMaps = path.join(
+        "node_modules",
+        "react-native",
+        "scripts",
+        "compose-source-maps.js",
+    );
+    if (fs.existsSync(composeSourceMaps)) {
+        return composeSourceMaps;
+    }
+    return null;
+}
+
 function serializeConnectionInfo(
     accessKey: string,
     preserveAccessKeyOnLogout: boolean,