AngularJS application with different customizations - angularjs

Question

I got a "framework" created by us using AngularJS. It allows to build questionnaire system and it has many different parameters that control the behavior of framework.
Using this framework we've created 2 projects: projectA and projectB. The difference between these projects are the settings and assets (css, img, ...)
Both projects are stored on the same branch in git and only config file defines the project customization.
I can't think of the best way how these 2 projects can be easily deployed separately from the same code source using Gulp or something other.
Here are some ideas I got for the moment:
1. Have both settings files and images (e.g. logo_A.png and logo_B.png) in the code and choose appropriate during build using Gulp
2. Create folder customizations that will have 2 subfolders A and B with corresponding settings and assets
3. Create separate repository for each project installation scripts (not the code) and these scripts will do all the work
What is the best way in this case?

Answer 1

Finally, the easieast and most understandible solution was to create additional custom folder.
Assets
In addition to normal application files I got now custom folder with 2 subfolders: A and B each of them containing assets (css, img) that correspond only to concrete project.
In gulp I've used yargs module which allows to pass parameters. After reading project name from input I can looks inside custom folder to see if there are resources interesting for me (I've just added custom folder into the resources paths).
var customPath = './custom/' + app.name;
exports.paths = {
web: {
//Resources
styles: ['./app/**/*.css', './app/**/*.scss', customPath + '/**/*.css', customPath + '/**/*.scss'],
...
And the call to build task now looks like this: gulp build --name A.
Configuration
One more thing was done for configuration file of AngularJS that contains constants. I've used gulp-ng-config plugin which allows to build AngularJS configuration (constants) file on fly. In my flow, first I check if custom configuration file exists inside custom folder I use it, if no I'm using default one from application.
var getAppScripts = function() {
return $.eventStream.merge(
gulp.src(config.paths.web.scripts)
.pipe($.jshint())
.pipe($.jshint.reporter('jshint-stylish'))
//.pipe($.eslint())
.pipe($.eslint.format()),
getAppConfig())
.pipe($.angularFilesort());
};
var getAppConfig = function() {
var configFile = config.paths.web.custom + "/app.config.yaml";
if (fs.existsSync(configFile)) {
return gulp.src(configFile)
.pipe($.ngConfig(config.app.name, {
parser: 'yml',
createModule: false
}));
}
else {
return gulp.src(config.paths.web.config);
}
}