Add manifest-path to allow cargo projects at any location

Author: jonasbb

CHANGELOG.md

@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.1.0] - 2022-11-21
+
+### Added
+
+* Add the input `manifest-path` to set the `--manifest-path` argument of rustfmt. #1
+    This allows formatting any cargo project in the repository independent of the location.
+
 ## [1.0.1] - 2022-10-13
 
 ### Changed

README.md

@@ -33,5 +33,15 @@ jobs:
         uses: actions-rust-lang/rustfmt@v1
 ```
 
+## Inputs
+
+All inputs are optional.
+If a [toolchain file](https://rust-lang.github.io/rustup/overrides.html#the-toolchain-file) (i.e., `rust-toolchain` or `rust-toolchain.toml`) is found in the root of the repository, it takes precedence.
+All input values are ignored if a toolchain file exists.
+
+| Name            | Description                                                              | Default      |
+| --------------- | ------------------------------------------------------------------------ | ------------ |
+| `manifest-path` | Path to the `Cargo.toml` file, by default in the root of the repository. | ./Cargo.toml |
+
 [`actions-rust-lang/setup-rust-toolchain`]: https://github.com/actions-rust-lang/setup-rust-toolchain
 [problem matcher]: https://github.com/actions/toolkit/blob/main/docs/problem-matchers.md

action.yml

@@ -6,6 +6,12 @@ branding:
   icon: "check-square"
   color: "yellow"
 
+inputs:
+  manifest-path:
+    description: "Specify the --manifest-path argument to rustfmt"
+    required: false
+    default: "./Cargo.toml"
+
 runs:
   using: composite
   steps:
@@ -14,7 +20,7 @@ runs:
       run: |
         # Run cargo and store the original output
         CARGO_STATUS=0
-        CARGO_OUTPUT=$(cargo fmt --all -- --color=always --check 2>/dev/null) || CARGO_STATUS=$?
+        CARGO_OUTPUT=$(cargo fmt --all --manifest-path=${{ inputs.manifest-path }} -- --color=always --check 2>/dev/null) || CARGO_STATUS=$?
 
         if [ ${CARGO_STATUS} -eq 0 ]; then
             cat <<MARKDOWN_INTRO >> $GITHUB_STEP_SUMMARY