Implement working directory setup

.github/workflows/build.yml

@@ -47,7 +47,7 @@ jobs:
         run: |
           set -euo pipefail
           latest_version="$(jq -r '.version' package.json)"
-          count_expected=21
+          count_expected=23
           count_actual="$(grep -c "setup-pixi@v$latest_version" README.md || true)"
           if [ "$count_actual" -ne "$count_expected" ]; then
             echo "::error file=README.md::Expected $count_expected mentions of \`setup-pixi@v$latest_version\` in README.md, but found $count_actual."

.github/workflows/test.yml

@@ -327,6 +327,94 @@ jobs:
           pixi-version: latest
       - run: pixi --version | grep -q "pixi 0.14.0"
 
+  working-directory:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: ./
+        with:
+          cache: false
+          working-directory: test/default
+      - run: |
+          set -o pipefail
+          pixi info
+          test -f .pixi/envs/default/bin/python
+          .pixi/envs/default/bin/python --version | grep -q 3.11
+        shell: bash
+        working-directory: test/default
+        if: matrix.os != 'windows-latest'
+      - run: |
+          set -o pipefail
+          pixi info
+          test -f .pixi/envs/default/python.exe
+          .pixi/envs/default/python.exe --version | grep -q 3.11
+        shell: bash
+        working-directory: test/default
+        if: matrix.os == 'windows-latest'
+      - run: pixi run python --version | grep -q 3.11
+        working-directory: test/default
+
+  working-directory-with-manifest-path:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: ./
+        with:
+          cache: false
+          working-directory: test
+          manifest-path: default/pixi.toml
+      - run: |
+          set -o pipefail
+          pixi info
+          test -f .pixi/envs/default/bin/python
+        shell: bash
+        working-directory: test/default
+        if: matrix.os != 'windows-latest'
+      - run: |
+          set -o pipefail
+          pixi info
+          test -f .pixi/envs/default/python.exe
+        shell: bash
+        working-directory: test/default
+        if: matrix.os == 'windows-latest'
+      - run: pixi run python --version | grep -q 3.11
+        working-directory: test/default
+
+  working-directory-with-absolute-manifest-path:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: ./
+        with:
+          cache: false
+          working-directory: test/default
+          manifest-path: ${{ github.workspace }}/test/default/pixi.toml
+      - run: |
+          set -o pipefail
+          pixi info
+          test -f .pixi/envs/default/bin/python
+        shell: bash
+        working-directory: test/default
+        if: matrix.os != 'windows-latest'
+      - run: |
+          set -o pipefail
+          pixi info
+          test -f .pixi/envs/default/python.exe
+        shell: bash
+        working-directory: test/default
+        if: matrix.os == 'windows-latest'
+      - run: pixi run python --version | grep -q 3.11
+        working-directory: test/default
+
   custom-manifest-path:
     strategy:
       matrix:

README.md

@@ -23,7 +23,7 @@ GitHub Action to set up the [pixi](https://github.com/prefix-dev/pixi) package m
 ## Usage
 
 ```yml
-- uses: prefix-dev/setup-pixi@v0.9.3
+- uses: prefix-dev/setup-pixi@v0.9.4
   with:
     pixi-version: v0.59.0
 
@@ -35,7 +35,7 @@ GitHub Action to set up the [pixi](https://github.com/prefix-dev/pixi) package m
 
 > [!WARNING]
 > Since pixi is not yet stable, the API of this action may change between minor versions.
-> Please pin the versions of this action to a specific version (i.e., `prefix-dev/setup-pixi@v0.9.3`) to avoid breaking changes.
+> Please pin the versions of this action to a specific version (i.e., `prefix-dev/setup-pixi@v0.9.4`) to avoid breaking changes.
 > You can automatically update the version of this action by using [Dependabot](https://docs.github.com/en/code-security/dependabot/working-with-dependabot/keeping-your-actions-up-to-date-with-dependabot).
 >
 > Put the following in your `.github/dependabot.yml` file to enable Dependabot for your GitHub Actions:
@@ -77,7 +77,7 @@ In order to not exceed the [10 GB cache size limit](https://docs.github.com/en/a
 This can be done by setting the `cache-write` argument.
 
 ```yml
-- uses: prefix-dev/setup-pixi@v0.9.3
+- uses: prefix-dev/setup-pixi@v0.9.4
   with:
     cache: true
     cache-write: ${{ github.event_name == 'push' && github.ref_name == 'main' }}
@@ -122,7 +122,7 @@ test:
       environment: [py311, py312]
   steps:
     - uses: actions/checkout@v4
-    - uses: prefix-dev/setup-pixi@v0.9.3
+    - uses: prefix-dev/setup-pixi@v0.9.4
       with:
         environments: ${{ matrix.environment }}
 ```
@@ -132,7 +132,7 @@ test:
 The following example will install both the `py311` and the `py312` environment on the runner.
 
 ```yml
-- uses: prefix-dev/setup-pixi@v0.9.3
+- uses: prefix-dev/setup-pixi@v0.9.4
   with:
     # separated by spaces
     environments: >-
@@ -155,7 +155,7 @@ For instance, the `keyring`, or `gcloud` executables. The following example show
 By default, global environments are not cached. You can enable caching by setting the `global-cache` input to `true`.
 
 ```yml
-- uses: prefix-dev/setup-pixi@v0.9.3
+- uses: prefix-dev/setup-pixi@v0.9.4
   with:
     global-environments: |
       google-cloud-sdk
@@ -188,7 +188,7 @@ Specify the token using the `auth-token` input argument.
 This form of authentication (bearer token in the request headers) is mainly used at [prefix.dev](https://prefix.dev).
 
 ```yml
-- uses: prefix-dev/setup-pixi@v0.9.3
+- uses: prefix-dev/setup-pixi@v0.9.4
   with:
     auth-host: prefix.dev
     auth-token: ${{ secrets.PREFIX_DEV_TOKEN }}
@@ -200,7 +200,7 @@ Specify the username and password using the `auth-username` and `auth-password`
 This form of authentication (HTTP Basic Auth) is used in some enterprise environments with [artifactory](https://jfrog.com/artifactory) for example.
 
 ```yml
-- uses: prefix-dev/setup-pixi@v0.9.3
+- uses: prefix-dev/setup-pixi@v0.9.4
   with:
     auth-host: custom-artifactory.com
     auth-username: ${{ secrets.PIXI_USERNAME }}
@@ -213,7 +213,7 @@ Specify the conda-token using the `auth-conda-token` input argument.
 This form of authentication (token is encoded in URL: `https://my-quetz-instance.com/t/<token>/get/custom-channel`) is used at [anaconda.org](https://anaconda.org) or with [quetz instances](https://github.com/mamba-org/quetz).
 
 ```yml
-- uses: prefix-dev/setup-pixi@v0.9.3
+- uses: prefix-dev/setup-pixi@v0.9.4
   with:
     auth-host: anaconda.org # or my-quetz-instance.com
     auth-conda-token: ${{ secrets.CONDA_TOKEN }}
@@ -225,7 +225,7 @@ Specify the S3 key pair using the `auth-access-key-id` and `auth-secret-access-k
 You can also specify the session token using the `auth-session-token` input argument.
 
 ```yaml
-- uses: prefix-dev/setup-pixi@v0.9.3
+- uses: prefix-dev/setup-pixi@v0.9.4
   with:
     auth-host: s3://my-s3-bucket
     auth-s3-access-key-id: ${{ secrets.ACCESS_KEY_ID }}
@@ -241,7 +241,7 @@ See the [pixi documentation](https://pixi.sh/latest/advanced/s3) for more inform
 You can specify whether to use keyring to look up credentials for PyPI.
 
 ```yml
-- uses: prefix-dev/setup-pixi@v0.9.3
+- uses: prefix-dev/setup-pixi@v0.9.4
   with:
     pypi-keyring-provider: subprocess # one of 'subprocess', 'disabled'
 ```
@@ -309,15 +309,15 @@ To this end, `setup-pixi` adds all environment variables set when executing `pix
 As a result, all installed binaries can be accessed without having to call `pixi run`.
 
 ```yml
-- uses: prefix-dev/setup-pixi@v0.9.3
+- uses: prefix-dev/setup-pixi@v0.9.4
   with:
     activate-environment: true
 ```
 
 If you are installing multiple environments, you will need to specify the name of the environment that you want to be activated.
 
 ```yml
-- uses: prefix-dev/setup-pixi@v0.9.3
+- uses: prefix-dev/setup-pixi@v0.9.4
   with:
     environments: >-
       py311
@@ -334,7 +334,7 @@ You can specify whether `setup-pixi` should run `pixi install --frozen` or `pixi
 See the [official documentation](https://pixi.sh/latest/reference/cli/pixi/install/#update-options) for more information about the `--frozen` and `--locked` flags.
 
 ```yml
-- uses: prefix-dev/setup-pixi@v0.9.3
+- uses: prefix-dev/setup-pixi@v0.9.4
   with:
     locked: true
     # or
@@ -353,7 +353,7 @@ The first one is the debug logging of the action itself.
 This can be enabled by running the action with the `RUNNER_DEBUG` environment variable set to `true`.
 
 ```yml
-- uses: prefix-dev/setup-pixi@v0.9.3
+- uses: prefix-dev/setup-pixi@v0.9.4
   env:
     RUNNER_DEBUG: true
 ```
@@ -371,7 +371,7 @@ The second type is the debug logging of the pixi executable.
 This can be specified by setting the `log-level` input.
 
 ```yml
-- uses: prefix-dev/setup-pixi@v0.9.3
+- uses: prefix-dev/setup-pixi@v0.9.4
   with:
     # one of `q`, `default`, `v`, `vv`, or `vvv`.
     log-level: vvv
@@ -397,7 +397,7 @@ If nothing is specified, `post-cleanup` will default to `true`.
 On self-hosted runners, you also might want to alter the default pixi install location to a temporary location. You can use `pixi-bin-path: ${{ runner.temp }}/bin/pixi` to do this.
 
 ```yml
-- uses: prefix-dev/setup-pixi@v0.9.3
+- uses: prefix-dev/setup-pixi@v0.9.4
   with:
     post-cleanup: true
     # ${{ runner.temp }}\Scripts\pixi.exe on Windows
@@ -413,17 +413,47 @@ You can also use a preinstalled local version of pixi on the runner by not setti
 This can be overwritten by setting the `manifest-path` input argument.
 
 ```yml
-- uses: prefix-dev/setup-pixi@v0.9.3
+- uses: prefix-dev/setup-pixi@v0.9.4
   with:
     manifest-path: pyproject.toml
 ```
 
+### Working directory for monorepos
+
+If you're working with a monorepo where your pixi project is in a subdirectory, you can use the `working-directory` input to specify where pixi should look for manifest files (`pixi.toml` or `pyproject.toml`).
+
+```yml
+- uses: prefix-dev/setup-pixi@v0.9.4
+  with:
+    working-directory: ./packages/my-project
+```
+
+This will make pixi look for `pixi.toml` or `pyproject.toml` in the `./packages/my-project` directory instead of the repository root. All pixi commands will be executed from this working directory.
+
+> [!NOTE]
+> The `working-directory` input only affects commands run by `setup-pixi` itself.
+> For subsequent `run:` steps, you need to set the working directory separately:
+>
+> ```yml
+> - run: pixi run test
+>   working-directory: ./packages/my-project
+> ```
+
+You can combine `working-directory` with `manifest-path` if needed:
+
+```yml
+- uses: prefix-dev/setup-pixi@v0.9.4
+  with:
+    working-directory: ./packages/my-project
+    manifest-path: custom-pixi.toml
+```
+
 ### Only install pixi
 
 If you only want to install pixi and not install the current project, you can use the `run-install` option.
 
 ```yml
-- uses: prefix-dev/setup-pixi@v0.9.3
+- uses: prefix-dev/setup-pixi@v0.9.4
   with:
     run-install: false
 ```
@@ -434,7 +464,7 @@ You can also download pixi from a custom URL by setting the `pixi-url` input arg
 Optionally, you can combine this with the `pixi-url-headers` input argument to supply additional headers for the download request, such as a bearer token.
 
 ```yml
-- uses: prefix-dev/setup-pixi@v0.9.3
+- uses: prefix-dev/setup-pixi@v0.9.4
   with:
     pixi-url: https://pixi-mirror.example.com/releases/download/v0.48.0/pixi-x86_64-unknown-linux-musl
     pixi-url-headers: '{"Authorization": "Bearer ${{ secrets.PIXI_MIRROR_BEARER_TOKEN }}"}'
@@ -450,7 +480,7 @@ It will be rendered with the following variables:
 By default, `pixi-url` is equivalent to the following template:
 
 ```yml
-- uses: prefix-dev/setup-pixi@v0.9.3
+- uses: prefix-dev/setup-pixi@v0.9.4
   with:
     pixi-url: |
       {{#if latest~}}

action.yml

@@ -18,6 +18,10 @@ inputs:
       One of `q`, `default`, `v`, `vv`, or `vvv`.
   manifest-path:
     description: Path to the manifest file (i.e., `pixi.toml`) to use for the pixi CLI. Defaults to `pixi.toml`.
+  working-directory:
+    description: |
+      Working directory to use for pixi commands. If specified, pixi will look for manifest files (pixi.toml or pyproject.toml) 
+      in this directory instead of the repository root. Useful for monorepos where pixi projects are in subdirectories.
   run-install:
     description: Whether to run `pixi install` after installing pixi. Defaults to `true`.
   environments: