gulp-template (lodash) falls over with javascript templating - gulp

Question

I am running a gulp script with gulp-template to inject values into my javascript files.
e.g.
angular
.module("<%= module %>", [
"ngRoute",
"ui.bootstrap",
"ui.select"
]);
This works fine for all the files except if I have javascript templating in the file
e.g.
function controller() {
var vm = this;
vm.getMessage = getMessage;
//------------------------------------------
function getMessage() {
if (!vm.validator)
return "";
var message = vm.validator.getMessage(vm.property);
if (message === "")
return "";
return ` *${message}`;
}
}
I then get the following error
events.js:167
throw er; // Unhandled 'error' event
^
ReferenceError: message is not defined
at eval (lodash.templateSources[10]:9:10)
at DestroyableTransform._transform (C:\andre\sourcecode\pmslogic\buildassets\node_modules\gulp-template\index.js:23:41)
at DestroyableTransform.Transform._read (C:\andre\sourcecode\pmslogic\buildassets\node_modules\through2\node_modules\readable-stre
am\lib\_stream_transform.js:184:10)
at DestroyableTransform.Transform._write (C:\andre\sourcecode\pmslogic\buildassets\node_modules\through2\node_modules\readable-str
eam\lib\_stream_transform.js:172:83)
at doWrite ([my path]node_modules\through2\node_modules\readable-stream\lib\_stream_writable.js:42
8:64)
at writeOrBuffer ([my path]node_modules\through2\node_modules\readable-stream\lib\_stream_writable
.js:417:5)
at DestroyableTransform.Writable.write ([my path]node_modules\through2\node_modules\readable-strea
m\lib\_stream_writable.js:334:11)
at write ([my path]node_modules\vinyl-fs\node_modules\readable-stream\lib\_stream_readable.js:623:
24)
at flow ([my path]node_modules\vinyl-fs\node_modules\readable-stream\lib\_stream_readable.js:632:7
)
at DestroyableTransform.pipeOnReadable ([my path]node_modules\vinyl-fs\node_modules\readable-strea
m\lib\_stream_readable.js:664:5)
Emitted 'error' event at:
at DestroyableTransform.onerror ([my path]node_modules\vinyl-fs\node_modules\readable-stream\lib\_
stream_readable.js:558:12)
at DestroyableTransform.emit (events.js:182:13)
at DestroyableTransform._transform ([my path]node_modules\gulp-template\index.js:26:9)
at DestroyableTransform.Transform._read ([my path]node_modules\through2\node_modules\readable-stre
am\lib\_stream_transform.js:184:10)
[... lines matching original stack trace ...]
at flow ([my path]node_modules\vinyl-fs\node_modules\readable-stream\lib\_stream_readable.js:632:7
)
I suspect I can solve this by passing lodash template parameters into the gulp-template call, but am stumped as to what these are.
var gulp = require("gulp");
var concat = require("gulp-concat");
var template = require('gulp-template');
...
var cfg = ????
return gulp
.src(src)
.pipe(template({ module: "test-module-name" }, cfg))
.pipe(concat(`${module}.js`))
.pipe(gulp.dest(dest));
};