feat(engine): add support for disableScopeLowerCase (#96)

engine.js

@@ -83,7 +83,9 @@ module.exports = function(options) {
             'What is the scope of this change (e.g. component or file name): (press enter to skip)',
           default: options.defaultScope,
           filter: function(value) {
-            return value.trim().toLowerCase();
+            return options.disableScopeLowerCase
+              ? value.trim()
+              : value.trim().toLowerCase();
           }
         },
         {

engine.test.js

@@ -18,7 +18,6 @@ var defaultOptions = {
 var type = 'func';
 var scope = 'everything';
 var subject = 'testing123';
-var subject2 = 'after the fall, I was gone';
 var longBody =
   'a a aa a aa a aa a aa a aa a aa a aa a aa a aa a aa a aa a aa a aa a aa a' +
   'a a aa a aa a aa a aa a aa a aa a aa a aa a aa a aa a aa a aa a aa a aa a aa a aa a aa a aa a' +
@@ -85,6 +84,23 @@ describe('commit message', function() {
       })
     ).to.equal(`${type}(${scope}): ${subject}\n\n${body}`);
   });
+  it('header and body w/ uppercase scope', function() {
+    var upperCaseScope = scope.toLocaleUpperCase();
+    expect(
+      commitMessage(
+        {
+          type,
+          scope: upperCaseScope,
+          subject,
+          body
+        },
+        {
+          ...defaultOptions,
+          disableScopeLowerCase: true
+        }
+      )
+    ).to.equal(`${type}(${upperCaseScope}): ${subject}\n\n${body}`);
+  });
   it('header, body and issues w/ out scope', function() {
     expect(
       commitMessage({
@@ -298,6 +314,9 @@ describe('defaults', function() {
       )
     ).to.equal(issues);
   });
+  it('disableScopeLowerCase default', function() {
+    expect(questionDefault('disableScopeLowerCase')).to.be.undefined;
+  });
 });
 
 describe('prompts', function() {

index.js

@@ -12,6 +12,8 @@ var options = {
   defaultSubject: process.env.CZ_SUBJECT || config.defaultSubject,
   defaultBody: process.env.CZ_BODY || config.defaultBody,
   defaultIssues: process.env.CZ_ISSUES || config.defaultIssues,
+  disableScopeLowerCase:
+    process.env.DISABLE_SCOPE_LOWERCASE || config.disableScopeLowerCase,
   maxHeaderWidth:
     (process.env.CZ_MAX_HEADER_WIDTH &&
       parseInt(process.env.CZ_MAX_HEADER_WIDTH)) ||