build: add flag for setting vendor version (electron#41247)

buildflags/BUILD.gn

@@ -14,4 +14,15 @@ buildflag_header("buildflags") {
     "ENABLE_BUILTIN_SPELLCHECKER=$enable_builtin_spellchecker",
     "OVERRIDE_LOCATION_PROVIDER=$enable_fake_location_provider",
   ]
+
+  if (electron_vendor_version != "") {
+    result = string_split(electron_vendor_version, ":")
+    flags += [
+      "HAS_VENDOR_VERSION=true",
+      "VENDOR_VERSION_NAME=\"${result[0]}\"",
+      "VENDOR_VERSION_VALUE=\"${result[1]}\"",
+    ]
+  } else {
+    flags += [ "HAS_VENDOR_VERSION=false" ]
+  }
 }

buildflags/buildflags.gni

@@ -21,4 +21,10 @@ declare_args() {
   # Packagers and vendor builders should set this in gn args to avoid running
   # the script that reads git tag.
   override_electron_version = ""
+
+  # Define an extra item that will show in process.versions, the value must
+  # be in the format of "key:value".
+  # Packagers and vendor builders can set this in gn args to attach extra info
+  # about the build in the binary.
+  electron_vendor_version = ""
 }

shell/common/node_bindings.cc

@@ -942,6 +942,10 @@ void OnNodePreload(node::Environment* env,
   if (dict.Get("versions", &versions)) {
     versions.SetReadOnly(ELECTRON_PROJECT_NAME, ELECTRON_VERSION_STRING);
     versions.SetReadOnly("chrome", CHROME_VERSION_STRING);
+#if BUILDFLAG(HAS_VENDOR_VERSION)
+    versions.SetReadOnly(BUILDFLAG(VENDOR_VERSION_NAME),
+                         BUILDFLAG(VENDOR_VERSION_VALUE));
+#endif
   }
 
   // Execute lib/node/init.ts.