Bug 1943654 - Generate the C++, JS and Rust metric files in parallel, r=chutten,sergesanspaille.

Differential Revision: https://phabricator.services.mozilla.com/D235470

toolkit/components/glean/build_scripts/glean_parser_ext/run_glean_parser.py

@@ -144,8 +144,6 @@ def main(cpp_fd, *args):
     def open_output(filename):
         return FileAvoidWrite(os.path.join(os.path.dirname(cpp_fd.name), filename))
 
-    [js_h_path, js_cpp_path, rust_path] = args[-3:]
-    args = args[:-3]
     all_objs, options = parse(args)
     all_metric_header_files = {}
 
@@ -164,9 +162,6 @@ def main(cpp_fd, *args):
                 all_metric_header_files[filename][category_name] = {}
             all_metric_header_files[filename][category_name][name] = metric
 
-    if "pings" in all_objs:
-        cpp.output_cpp(all_objs, cpp_fd, options)
-    else:
     get_metric_id = generate_metric_ids(all_objs, options)
     for header_name, objs in all_metric_header_files.items():
         cpp.output_cpp(
@@ -179,13 +174,48 @@ def main(cpp_fd, *args):
             {"header_name": header_name, "get_metric_id": get_metric_id},
         )
 
+    return get_deps()
+
+
+def js_metrics(js_cpp_fd, *args):
+    def open_output(filename):
+        return FileAvoidWrite(os.path.join(os.path.dirname(js_cpp_fd.name), filename))
+
+    js_h_path = args[-1]
+    args = args[:-1]
+    all_objs, options = parse(args)
+
+    with open_output(js_h_path) as js_fd:
+        js.output_js(all_objs, js_fd, js_cpp_fd, options)
+
+    return get_deps()
+
+
+def rust_metrics(rust_fd, *args):
+    all_objs, options = parse(args)
+
+    # We only need this info if we're dealing with pings.
+    ping_names_by_app_id = {}
+    rust.output_rust(all_objs, rust_fd, ping_names_by_app_id, options)
+
+    return get_deps()
+
+
+def pings(cpp_fd, *args):
+    def open_output(filename):
+        return FileAvoidWrite(os.path.join(os.path.dirname(cpp_fd.name), filename))
+
+    [js_h_path, js_cpp_path, rust_path] = args[-3:]
+    args = args[:-3]
+    all_objs, options = parse(args)
+
+    cpp.output_cpp(all_objs, cpp_fd, options)
+
     with open_output(js_h_path) as js_fd:
         with open_output(js_cpp_path) as js_cpp_fd:
             js.output_js(all_objs, js_fd, js_cpp_fd, options)
 
-    # We only need this info if we're dealing with pings.
     ping_names_by_app_id = {}
-    if "pings" in all_objs:
     from os import path
 
     sys.path.append(path.join(path.dirname(__file__), path.pardir, path.pardir))

toolkit/components/glean/moz.build

@@ -173,24 +173,37 @@ GeneratedFile(
 GeneratedFile(
     "GleanMetrics.h",
     *metrics_headers,
-    "GleanJSMetricsLookup.h",
+    script="build_scripts/glean_parser_ext/run_glean_parser.py",
+    flags=glean_parser_flags,
+    inputs=["!metrics_yamls.cached"],
+)
+
+GeneratedFile(
     "GleanJSMetricsLookup.cpp",
-    "api/src/metrics.rs",
+    "GleanJSMetricsLookup.h",
+    entry_point="js_metrics",
     script="build_scripts/glean_parser_ext/run_glean_parser.py",
     flags=glean_parser_flags
     + [
         "GleanJSMetricsLookup.h",
-        "GleanJSMetricsLookup.cpp",
-        "api/src/metrics.rs",
     ],
     inputs=["!metrics_yamls.cached"],
 )
 
+GeneratedFile(
+    "api/src/metrics.rs",
+    entry_point="rust_metrics",
+    script="build_scripts/glean_parser_ext/run_glean_parser.py",
+    flags=glean_parser_flags,
+    inputs=["!metrics_yamls.cached"],
+)
+
 GeneratedFile(
     "GleanPings.h",
     "GleanJSPingsLookup.h",
     "GleanJSPingsLookup.cpp",
     "api/src/pings.rs",
+    entry_point="pings",
     script="build_scripts/glean_parser_ext/run_glean_parser.py",
     flags=glean_parser_flags
     + [