* Validate user-provided config with jest-validate
* Don't use object shorthand
* Update jest-validate to 18.2
* Fix Node4 destructuring from require
* Make use of jest-validate for deprecation message
* Remove chalk reference
* Use babel-code-frame for syntax errors
* Support the `--color` option more explicitly
* Update rollup config to handle babel-code-frame
* Use exact dependencies
This one is really weird
```js
if (() => {} ? 1 : 0) {}
```
parses fine but
```js
if (() => {
} ? 1 : 0) {}
```
is a syntax error. Let's always add a parenthesis.
Note that no one is every going to write this in practice, this is really useless :p
We actually need this `;` for EmptyStatement, otherwise it applies to the next block of code. (Creating a label with an empty statement is completely useless, but it triggers a lot in the fuzz testing tool)
Fixes#376
We avoid adding a `;` for a variable declaration in for loop but this is only meant if the var declaration is inside of the `()` part of the for loop. Not if the body part.
Fixes#385
* Add tests for quotes
* Update test snapshots
* Output strings with the minimum amount of escaped quotes
* Update test snapshots
* Move tests/prettier/quotes.js into tests/quotes/strings.js
* Update test snapshots
- During the first iteration, we printed the unescaped values which let to printing invalid JavaScript characters and bad things like invisible characters.
- During the second iteration, we escaped everything, which generated valid JavaScript but you lost your emojis and chinese/cyrillic characters
In this iteration, which I hope will be the last one, we maintain the string exactly as encoded and only swap quotes. The swap quotes implementation is a bit convoluted but I think it works.
This PR adds two things:
`--debug-print-doc` command that prints the formatted doc
```js
echo "<div><</div>" | ./bin/prettier.js --stdin --debug-print-doc
[
groupConditional(
group([
group([ "<", "div", group([ indent(2, []), softline() ]), ">" ]),
"<",
"</",
"div",
">"
]),
[
group([
group([ "<", "div", group([ indent(2, []), softline() ]), ">" ]),
"<",
"</",
"div",
">"
]),
group([
group([ "<", "div", group([ indent(2, []), softline() ]), ">" ]),
indent(2, groupBreak([ hardline(), "<" ])),
hardline(),
"</",
"div",
">"
])
]
),
";",
hardline()
];
```
The ability to view the IR in real time on the browser display:
The way it works is pretty cool, we take the doc IR and print a valid JavaScript string out of it, that we then send to prettier in order to make it look good :)
The previous API was inconsistent. The new one is
```js
--parser flow
--parser babylon
{parser: 'flow'}
{parser: 'babylon'}
```
if we ever want to add new parsers in the future it'll allow that more easily.
I put a console.log in parser.js in both functions and tested that the test suite worked both with and without the change in run_spec. I also tested that both the previous and new command line options are working.
At some point in the future we'll likely want to get rid of the old api but might as well keep supporting it so we don't break anyone for now.
Make all the files have a single module.exports call at the end of the file.
I added a missing `"use strict";` and removed a few unused functions from utils at the same time.
- doc-printer.js is now the direct implementation of the Wadler paper
- doc-builders.js are a lot of utils to generate the IR the above file needs
- doc-utils.js are small utils to traverse list of docs.
It's annoying that there's a bug inside of the flow parser, I raised it internally. While this is getting fixed, we can workaround it. This now makes babylon properly escape JSXText.
I thought I didn't need to check the length but forgot that the rest argument is not in the list for class declaration. Now it doesn't crash anymore and there's a test...
The current output of
```js
[...a, ...b]
```
is
```js
[...a, , ...b]
```
because flow parses it as
```
ArrayExpression(SpreadExpression, null, SpreadExpression)
```
This is a bug in the flow parser. Until it gets fixed, we can workaround it by deleting the `null` after a `SpreadExpression`.
* Remove +1 from newline detection
All the changes are related to spurious `;`. Sometimes the logic is more correct, sometimes less. Since `;` are going to be removed after the first save, I don't think it matters that much.
* Handle inconsistent `end` node locations when looking for newlines
I copy and pasted the code for arrays which doesn't have this problem. Would be nice to come up with an abstraction for a list of stuff separated by commas. It happens a lot of time and right now it's duplicated everywhere.
Fixes#255
According to @mroch, "Flow is using CESU-8, not UTF-8. http://www.unicode.org/reports/tr26/ ". While this is being fixed in flow, we can easily work around it inside of prettier. The downside of this approach is that we can't convert those strings to single or double quotes anymore.
```js
for (;;);
function f() {}
```
The `;` was dropped meaning that the line right after was executed within the for loop which is not correct.
I tried to return `;` but it looks like
```js
for (;;)
;
```
which looks super weird so I ended up printing `{}` which looks like
```js
for (;;) {}
```
The current implementation with `JSON.stringify()` is clever but unfortunately generates incorrect JavaScript. Using `jsesc` seems like a better and safer option. https://github.com/mathiasbynens/jsesc It doesn't have any dependencies and is pretty small.
I opted for escaping all the non ascii characters, so we don't display emojis anymore. I don't think that the world is ready yet for having random unicode characters inside of source files, there still are so many parts of the toolchain that breaks with them. If we want to revert back on this decision, there's a `minimal` option on jsesc which only escapes values that need to in order to generate valid JavaScript file (assuming the encoding of the file is set to utf8).
Also, while working on React Native, we've seen that there is an optimization inside of jsc for js files that are all ascii: it doesn't do a copy for the conversion to ucs16.
Fixes#163
There's a handful of files inside of Nuclide that throw exceptions because an assertion is raised.
```
{ AssertionError: ']' === '`'
at fixTemplateLiteral (/Users/vjeux/random/prettier/src/util.js:105:10)
at Object.util.fixFaultyLocations (/Users/vjeux/random/prettier/src/util.js:45:5)
at getSortedChildNodes (/Users/vjeux/random/prettier/src/comments.js:25:8)
at getSortedChildNodes (/Users/vjeux/random/prettier/src/comments.js:61:5)
at decorateComment (/Users/vjeux/random/prettier/src/comments.js:71:20)
at decorateComment (/Users/vjeux/random/prettier/src/comments.js:85:7)
at decorateComment (/Users/vjeux/random/prettier/src/comments.js:85:7)
at decorateComment (/Users/vjeux/random/prettier/src/comments.js:85:7)
at decorateComment (/Users/vjeux/random/prettier/src/comments.js:85:7)
at /Users/vjeux/random/prettier/src/comments.js:129:5
```
When trying https://github.com/facebook/nuclide/blob/master/pkg/nuclide-task-runner/lib/main.js#L174
It throws in the fixTemplateLiteral method.
That method was added to fix https://github.com/benjamn/recast/issues/216 more than a year ago
```js
var x = {
y: () => Relay.QL`
query {
${foo},
field,
}
`
};
```
I've checked (and added a test) and it now parses and prints correctly without that method. So it should be safe to remove.
We were not printing the directives if the body of the function was empty in babylon. Also, we were printing way too many \n
```js
echo "function fn() { 'use strict'; }" | ./bin/prettier.js --stdin
function fn() {
"use strict";
}
```
```js
echo "function fn() { 'use strict'; }" | ./bin/prettier.js --stdin --flow-parser
function fn() {
"use strict";
}
```
DeclareInterface (flow) and InterfaceDeclaration (babylon) are the same type so should behave the same way. I am using the same `declare` trick where I only add it if you are inside of a `declare module` block.
Michał Pierzchała
