Add minimal package.json to support npm install

Author: kateinoigakukun

.github/workflows/wasm.yml

@@ -102,6 +102,12 @@ jobs:
           name: artifact-${{ matrix.config.target }}
           path: ${{ matrix.config.target }}.tgz
 
+      - name: Save per-config package (release)
+        uses: actions/upload-artifact@v4
+        with:
+          name: artifact-${{ matrix.config.target }}-release
+          path: ${{ matrix.config.target }}-release.tgz
+
   deploy:
     name: Deploy
     runs-on: ubuntu-latest

extras/wasm/template/package.json

@@ -0,0 +1,14 @@
+{
+    "name": "pdfium-lib",
+    "version": "{pdfium-branch-version}.0.0",
+    "exports": {
+      ".": {
+        "require": "./node/pdfium.js",
+        "import": "./node/pdfium.esm.js"
+      },
+      "./pdfium.wasm": {
+        "require": "./node/pdfium.wasm",
+        "import": "./node/pdfium.esm.wasm"
+      }
+    }
+  }

modules/wasm.py

@@ -691,6 +691,11 @@ def run_task_generate():
                 os.path.join(node_dir, "index.html"),
             )
 
+            f.copy_file(
+                os.path.join(template_dir, "package.json"),
+                os.path.join(main_dir, "package.json"),
+            )
+
             # change template tags
             l.colored("Replacing template tags...", l.YELLOW)
 
@@ -700,6 +705,12 @@ def run_task_generate():
                 c.pdfium_git_branch,
             )
 
+            f.replace_in_file(
+                os.path.join(main_dir, "package.json"),
+                "{pdfium-branch-version}",
+                c.pdfium_git_branch.strip("chromium/"),
+            )
+
             # test
             l.colored(
                 "Test on browser with: python3 -m http.server --directory {0}".format(
@@ -790,13 +801,25 @@ def run_task_archive():
                 current_dir, "build", target["target_os"], target["target_cpu"], config
             )
 
+            filter_files = lambda x: (
+                None if "_" in x.name and not x.name.endswith(".h") else x
+            )
+
             tar.add(
                 name=lib_dir,
                 arcname=os.path.basename(lib_dir),
-                filter=lambda x: (
-                    None if "_" in x.name and not x.name.endswith(".h") else x
-                ),
+                filter=filter_files,
+            )
+
+            # Create per config "npm install"-compatible tarball
+            per_config_tar = tarfile.open(os.path.join(current_dir, f"wasm-{config}.tgz"), "w:gz")
+            per_config_tar.add(
+                name=lib_dir,
+                # Use "package" as the root directory to be compatible with "npm install"
+                arcname="package",
+                filter=filter_files,
             )
+            per_config_tar.close()
 
     tar.close()