This changes rustfmt to return exit code 4
when run with write mode diff and differences between
the formatted code and the original code are found.
Useful for CI to make sure your contributors actually ran rustfmt.
This commit adds a type to represent lines in files, and adds it to the
`Config` struct. It will be used for restricting formatting to specific
lines.
Refs #434
This commit adds a `codemap` module, and moves the `CodemapSpanUtils`
added in #857 to it. This is preparation for adding more `Codemap`
specific utilities.
Refs #434
* Handle pub(restricted)
This commit properly handles pub(restricted) as introduced in RFC 1422
[0]. The syntax support was added in #971, but they were not correctly
formatted.
[0] https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.mdFixes#970
* Drop #[inline] attribute on format_visibility
* Make newly non-failing functions return String
The change to `format_visibiilty` means that `format_header` and
`format_unit_struct` can no longer fail. Their return type is updated to
reflect that.
The old behaviour stored everything in memory until we were finished. Now we write as soon as we can.
This gives better behaviour when formatting large programs, since there is some progress indication. It also opens the door to optimising memory use by not storing everything in memory unless it is required (which it still might be). That is left as future work though.
Outputting child module contents in the "Plain" write mode does not make
sense, since there is no way to differentiate code that came from a
child module from that which came from the parent file.
This `if` was used to separate error output from the formatting output, when they both used stdout. It was useful for integration with tools, which can submit input to stdin and read pretty printed result from stdout without worrying about errors intermingled with the actual result.
But now we write errors to `stderr`, so the problem disappears and we can safely remove this `if`.
Errors should never pass silently, unless explicitly silenced.
This commit tidies up handling of `write_mode` by setting it in the
config at the start, and removing the `write_mode` parameter threaded
throughout the formatting process.
Also from @marcusklaas:
Refactor code output functions
Specifically, `write_all_files` no longer returns a HashMap. It would sometimes
contain items, and sometimes be empty. When "fixed" newlines are required, this
must now be done with a separate call. The tests use this strategy and should now pass!
The Display implementation for FormatReport already prints
a newline after every error.
However, if the format report does not contain errors, we
don't want to print an empty newline.
This behavior clutters up the console output with
empty lines when rustfmt is invoked multiple times
(from .e.g a script or cargo-fmt).
So instead of using println! to print the report, we just
use print!.
