support multistage sourcemap

[vvakame]

Trying to support multistage sourcemap
plan

• replace espower-source to espower
• implements initial multi stage sourcemap support
• think about options. sourceRoot, mapRoot, and any others
• improve tests. base64 format, external file format & 1:N file SourceMap
• refactor
• owner's review

[twada]

@vvakame Great contribution! I'm looking forward to see this PR works well.

[vvakame]

$ grunt demo
(omit)
Testing coffee_power_assert_demo_test.jsFFF
>> coffee - demo1
>> Message: MESSAGE # coffee_power_assert_demo_test.coffee:19
>>
>> test.ok(three === five, 'MESSAGE')
>>         |     |   |
>>         |     |   5
>>         3     false
>>
>> [number] five
>> => 5
>> [number] three
>> => 3
>>
>> Error: false == true
>>
>> test.ok(three === five, 'MESSAGE')
>>         |     |   |
>>         |     |   5
>>         3     false
>>
>> [number] five
>> => 5
>> [number] three
>> => 3
>>
>> at Decorator.concreteAssert (node_modules/empower/lib/decorator.js:60:21)
>> at Object.ok (node_modules/empower/lib/decorate.js:44:26)
>> at Object.exports.coffee.demo1 (../../src/tests/coffee_power_assert_demo_test.coffee:19:14)
>> at Object.exports.coffee.setUp (../../src/tests/coffee_power_assert_demo_test.coffee:10:9)
>> at Object.oncomplete (fs.js:107:15)

@twada I'll try add a typescript demo.
I have a question. power-assert-formatter are planned support for sourcemap?

[twada]

@twada I'll try add a typescript demo.

Great!! 👍

I have a question. power-assert-formatter are planned support for sourcemap?

If we need to.

Currently, espower module appends extra information into the output, like this.

assert(assert._expr(assert._capt(falsy, 'arguments/0'), {
    content: 'assert(falsy)',
    filepath: 'test/fixtures/example.js',
    line: 4
}));

If upstream SourceMap is passed to espower as options.sourceMap,

• line property is adjusted to originalPosition
• filepath property is adjusted to corresponding source for mapping

When the information is not enough to display power-assert output later, we should plan to embed sourcemap itself into code or find another way.

[vvakame]

grunt-espower works fine with TypeScript 😸

[twada]

grunt-espower works fine with TypeScript 😸

Sounds great!!!

[vvakame]

well done!

[twada]

@vvakame Great Job!! I'll review this PR tomorrow.

[twada]

[twada]

@vvakame functional testing has begun and unfortunately, something is wrong.
(Maybe sourcesContents is missing?)

So, please check output with debugger as below.

1. (git clone https://github.com/twada/battlefield-sourcemaps.git)
2. (cd battlefield-sourcemaps)
3. npm link grunt-espower
4. npm install
5. (bower install)
6. grunt grunt_espower
7. gulp serve
8. visit http://localhost:9001/build/grunt/grunt_espower/test.html with debugger

Thanks!

[vvakame]

@twada fixed!

[twada]

@vvakame Great! 👍

[twada]

https://github.com/twada/battlefield-sourcemaps#grunt-espower