Fix --manifest-path Cargo.toml

[Finomnis]

Fixes #928.

Observation

• --manifest-path ./Cargo.toml works
• --manifest-path Cargo.toml does not:

  Unable to run the check command: 'cargo check' at ''
  

Cause

• path.parent() yields an empty string for Cargo.toml

Proposed solution

• path.canonicalize().parent().

Why this is a problem

• --manifest-path Cargo.toml is an accepted flag for normal cargo. In my case it caused an error in combination with minimal-versions, which adds --manifest-path Cargo.toml to the command:

  cargo minimal-versions msrv verify
  

  which fails without this PR, and succeeds with it.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 7 lines in your changes are missing coverage. Please review.

Project coverage is 73.46%. Comparing base (072b299) to head (980e79a).
Report is 83 commits behind head on main.

Files	Patch %	Lines
src/context.rs	0.00%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #929      +/-   ##
==========================================
- Coverage   73.60%   73.46%   -0.14%     
==========================================
  Files          81       80       -1     
  Lines        5626     5548      -78     
==========================================
- Hits         4141     4076      -65     
+ Misses       1485     1472      -13     

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[foresterre]

Thanks!

[Finomnis]

@foresterre would you mind releasing a .21 with it soon? I kind of need it for the CI of a project of mine :)

[foresterre]

Absolutely. Thanks again!

• GitHub release
• crates.io