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resolve: fix the visibility of extern crates #31362

Merged
merged 4 commits into from
Feb 25, 2016
Merged

resolve: fix the visibility of extern crates #31362

merged 4 commits into from
Feb 25, 2016

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jseyfried
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This PR changes the visibility of extern crate declarations to match that of items (fixes #26775).
To avoid breakage, the PR makes it a public_in_private lint to reexport a private extern crate, and it adds the lint inaccessible_extern_crate for uses of an inaccessible extern crate.

The lints can be avoided by making the appropriate extern crate declaration public.

@jseyfried
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cc @nikomatsakis @petrochenkov

@petrochenkov
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except that it allows private extern crate declarations to be re-exported. This exception considerably reduces breakage

It doesn't necessarily have to be a hard error immediately, you can mark such reexports with private_in_public warning (see https://github.com/rust-lang/rust/blob/master/src/librustc_resolve/resolve_imports.rs#L504 for example).
It's not like this warning is going to become an error any time soon.

@jseyfried jseyfried force-pushed the fix_extern_crate_visibility branch 2 times, most recently from 9d5ef32 to 9f6dd8e Compare February 2, 2016 11:18
@jseyfried
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@petrochenkov Good point, I added another commit making it a warning.

@jseyfried jseyfried force-pushed the fix_extern_crate_visibility branch 6 times, most recently from cce80e7 to 2168764 Compare February 3, 2016 00:34
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nrc commented Feb 3, 2016

cc @rust-lang/lang

@nrc nrc added the S-waiting-on-crater Status: Waiting on a crater run to be completed. label Feb 3, 2016
nrc
nrc reviewed Feb 3, 2016
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src/librustc_resolve/resolve_imports.rs
if name_binding.is_extern_crate() {
let msg = format!("extern crate `{}` is private, and cannot be reexported \
(error E0364), consider declaring with `pub`",
source);
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can you move the consider... bit to a note please

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oh wait, you can't it's a lint, nvm

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nrc commented Feb 3, 2016

The PR lgtm. I'll wait for a crater run and for the lang team to see this before giving r+ though.

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aturon commented Feb 3, 2016

Seems to match our previous decision on this question, so LGTM as well.

petrochenkov
petrochenkov reviewed Feb 3, 2016
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src/librustc/lib.rs
@@ -68,6 +68,7 @@ extern crate serialize as rustc_serialize; // used by deriving
#[cfg(test)]
extern crate test;

#[allow(private_in_public)]
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Is pub extern crate very buggy? I think it can be used here instead of suppressing the warning. It will report the "pub extern crate does not work as expected" warning during stage0, but that's ok.

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Good point, for some reason I thought that the warnings weren't ok.
pub extern crate works fine except that it is not visible to other crates (before this PR).

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bors commented Feb 5, 2016

☔ The latest upstream changes (presumably #31386) made this pull request unmergeable. Please resolve the merge conflicts.

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This also closes #22146.

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bors commented Feb 11, 2016

☔ The latest upstream changes (presumably #31461) made this pull request unmergeable. Please resolve the merge conflicts.

@jseyfried jseyfried mentioned this pull request Feb 11, 2016
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@jseyfried jseyfried force-pushed the fix_extern_crate_visibility branch 2 times, most recently from ea0b0d5 to 3acbd2f Compare February 11, 2016 08:05
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bors commented Feb 11, 2016

☔ The latest upstream changes (presumably #31487) made this pull request unmergeable. Please resolve the merge conflicts.

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nrc commented Feb 11, 2016

@brson or @alexcrichton could we get a crater run for this PR please?

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bors commented Feb 25, 2016

⌛ Testing commit 7ad7065 with merge f06ff1a...

Manishearth added a commit to Manishearth/rust that referenced this pull request Feb 25, 2016
@Manishearth
Rollup merge of rust-lang#31362 - jseyfried:fix_extern_crate_visibili…
a48f958 
…ty, r=nikomatsakis

This PR changes the visibility of extern crate declarations to match that of items (fixes rust-lang#26775).
To avoid breakage, the PR makes it a `public_in_private` lint to reexport a private extern crate, and it adds the lint `inaccessible_extern_crate` for uses of an inaccessible extern crate.

The lints can be avoided by making the appropriate `extern crate` declaration public.
@Manishearth Manishearth mentioned this pull request Feb 25, 2016
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@Manishearth Manishearth reopened this Feb 25, 2016
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bors commented Feb 25, 2016

⌛ Testing commit 7ad7065 with merge 4a01bac...

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bors commented Feb 25, 2016

💔 Test failed - auto-linux-64-nopt-t

bors added a commit that referenced this pull request Feb 25, 2016
@bors
Auto merge of #31882 - Manishearth:rollup, r=Manishearth
c9852e2 
- Successful merges: #31362, #31793, #31800, #31809, #31818, #31827, #31831, #31835, #31837, #31846
- Failed merges:
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@bors: retry

On Thu, Feb 25, 2016 at 12:28 AM, bors notifications@github.com wrote:

[image: 💔] Test failed - auto-linux-64-nopt-t
http://buildbot.rust-lang.org/builders/auto-linux-64-nopt-t/builds/8166

—
Reply to this email directly or view it on GitHub
#31362 (comment).

@bors bors merged commit 7ad7065 into rust-lang:master Feb 25, 2016
@llogiq llogiq mentioned this pull request Feb 28, 2016
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@SimonSapin SimonSapin mentioned this pull request Mar 5, 2016
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@jseyfried jseyfried mentioned this pull request Mar 15, 2016
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@jseyfried jseyfried mentioned this pull request Mar 23, 2016
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@jseyfried jseyfried deleted the fix_extern_crate_visibility branch March 25, 2016 22:53
@bvssvni bvssvni mentioned this pull request Apr 6, 2016
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@jseyfried jseyfried mentioned this pull request Apr 10, 2016
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@mitchmindtree mitchmindtree mentioned this pull request Apr 17, 2016
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@jgilchrist jgilchrist mentioned this pull request Apr 18, 2016
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@petrochenkov petrochenkov mentioned this pull request Jun 28, 2016
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@petrochenkov petrochenkov mentioned this pull request Oct 1, 2016
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@jseyfried jseyfried mentioned this pull request Oct 7, 2016
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@jseyfried jseyfried changed the title Resolve: Fix the visibility of extern crates resolve: Fix the visibility of extern crates Feb 14, 2017
@jseyfried jseyfried changed the title resolve: Fix the visibility of extern crates resolve: fix the visibility of extern crates Feb 14, 2017
@SimonSapin SimonSapin mentioned this pull request Oct 30, 2017
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