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Allow writing Cargo.toml in project directory. #348

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merged 1 commit into from
Nov 21, 2019

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reitermarkus
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The project directory was previously deliberately mounted as read-only since “well behaved crates should only ever write to $OUT_DIR and never modify $CARGO_MANIFEST_DIR”. That however, breaks the --locked flag and is not worth the additional complexity.

Fixes #346.

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bors try

bors bot added a commit that referenced this pull request Nov 15, 2019
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bors bot commented Nov 15, 2019

try

Build succeeded

  • rust-embedded.cross

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Would it be possible to instead mount the Cargo.toml file in docker as rw as an alternative?

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No, since it's a file. You can only mount directories as a volume.

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@therealprof therealprof left a comment

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Not a big fan of this change, it's a bit of a capitulation.

But if you think it's the only way I'll approve it.

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reitermarkus commented Nov 16, 2019

if you think it's the only way

I mean there could be another way, but I'm pretty sure it wouldn't be worth the additional complexity for virtually no gain. If this really was a big enough problem, cargo itself should be responsible for preventing self-modifying crates.

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No, since it's a file. You can only mount directories as a volume.

I'm pretty certain it's possible in docker.

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I'm pretty certain it's possible in docker.

You're right, seems like it is indeed possible.

Still, this wouldn't work in the case when Cargo.lock doesn't exist yet.

@reitermarkus reitermarkus requested review from therealprof and a team November 19, 2019 17:11
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bors r+

bors bot added a commit that referenced this pull request Nov 21, 2019
348: Allow writing `Cargo.toml` in project directory. r=therealprof a=reitermarkus

The project directory was previously deliberately mounted as read-only since “well behaved crates should only ever write to `$OUT_DIR` and never modify `$CARGO_MANIFEST_DIR`”.  That however, breaks the `--locked` flag and is not worth the additional complexity.

Fixes #346.

Co-authored-by: Markus Reiter <me@reitermark.us>
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bors bot commented Nov 21, 2019

Build succeeded

@bors bors bot merged commit 83778cb into cross-rs:master Nov 21, 2019
@reitermarkus reitermarkus deleted the project-writable branch November 21, 2019 22:13
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"--locked" flag ignored in "cross build"
3 participants