feat: add --no-service option for pbjs static target (protobufjs#1577)

This option skips generation of service clients.

Co-authored-by: Alexander Fenster <[email protected]>

Author: mdouglass

cli/README.md

@@ -63,6 +63,7 @@ Translates between file formats and generates static code.
   --no-delimited   Does not generate delimited encode/decode functions.
   --no-beautify    Does not beautify generated code.
   --no-comments    Does not output any JSDoc comments.
+  --no-service     Does not output service classes.
 
   --force-long     Enforces the use of 'Long' for s-/u-/int64 and s-/fixed64 fields.
   --force-number   Enforces the use of 'number' for s-/u-/int64 and s-/fixed64 fields.

cli/pbjs.js

@@ -41,7 +41,7 @@ exports.main = function main(args, callback) {
             "force-message": "strict-message"
         },
         string: [ "target", "out", "path", "wrap", "dependency", "root", "lint" ],
-        boolean: [ "create", "encode", "decode", "verify", "convert", "delimited", "beautify", "comments", "es6", "sparse", "keep-case", "force-long", "force-number", "force-enum-string", "force-message" ],
+        boolean: [ "create", "encode", "decode", "verify", "convert", "delimited", "beautify", "comments", "service", "es6", "sparse", "keep-case", "force-long", "force-number", "force-enum-string", "force-message" ],
         default: {
             target: "json",
             create: true,
@@ -52,6 +52,7 @@ exports.main = function main(args, callback) {
             delimited: true,
             beautify: true,
             comments: true,
+            service: true,
             es6: null,
             lint: lintDefault,
             "keep-case": false,
@@ -132,6 +133,7 @@ exports.main = function main(args, callback) {
                 "  --no-delimited   Does not generate delimited encode/decode functions.",
                 "  --no-beautify    Does not beautify generated code.",
                 "  --no-comments    Does not output any JSDoc comments.",
+                "  --no-service     Does not output service classes.",
                 "",
                 "  --force-long     Enforces the use of 'Long' for s-/u-/int64 and s-/fixed64 fields.",
                 "  --force-number   Enforces the use of 'number' for s-/u-/int64 and s-/fixed64 fields.",

cli/targets/static.js

@@ -109,6 +109,10 @@ function aOrAn(name) {
 function buildNamespace(ref, ns) {
     if (!ns)
         return;
+
+    if (ns instanceof Service && !config.service)
+        return;
+
     if (ns.name !== "") {
         push("");
         if (!ref && config.es6)