Show helpful error message when task executable is not on the path

.github/workflows/ci.yml

@@ -61,8 +61,8 @@ jobs:
       - name: Run tests
         run: poetry run pytest -v
 
-  build-release:
-    name: Build and release
+  build:
+    name: Build distribution
     runs-on: ubuntu-latest
     needs: [code-quality, run-tests]
     steps:
@@ -78,18 +78,76 @@ jobs:
       - name: Build package
         run: poetry build
 
-      - name: Publish package to PyPI
+      - name: Store the distribution packages
         if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
-        run: poetry publish -n
-        env:
-          POETRY_PYPI_TOKEN_PYPI: ${{ secrets.pypi }}
+        uses: actions/upload-artifact@v3
+        with:
+          name: python-package-distributions
+          path: dist/
 
-      - name: Update homebrew formula
-        # if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
+  pypi-publish:
+    name: Upload release to PyPI
+    if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
+    needs: [build]
+    runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: https://pypi.org/p/poethepoet
+    permissions:
+      id-token: write
+    steps:
+      - name: Download all the dists
+        uses: actions/download-artifact@v3
+        with:
+          name: python-package-distributions
+          path: dist/
+
+      - name: Publish distribution 📦 to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+
+  homebrew-publish:
+    name: Upload homebrew formula
+    needs: [pypi-publish]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Trigger update of homebrew formula
         run: >
           curl -L -X POST
           -H "Accept: application/vnd.github+json"
           -H "Authorization: Bearer ${{ secrets.homebrew_pat }}"
           -H "X-GitHub-Api-Version: 2022-11-28"
           https://api.github.com/repos/nat-n/homebrew-poethepoet/actions/workflows/71211730/dispatches
           -d '{"ref":"main", "inputs":{}}'
+
+  github-release:
+    name: >-
+      Sign the Python 🐍 distribution 📦 with Sigstore and upload them to GitHub Release
+    needs: [pypi-publish]
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: write
+      id-token: write
+
+    steps:
+    - name: Download all the dists
+      uses: actions/download-artifact@v3
+      with:
+        name: python-package-distributions
+        path: dist/
+    - name: Sign the dists with Sigstore
+      uses: sigstore/gh-action-sigstore-python@v1.2.3
+      with:
+        inputs: >-
+          ./dist/*.tar.gz
+          ./dist/*.whl
+    - name: Upload artifact signatures to GitHub Release
+      env:
+        GITHUB_TOKEN: ${{ github.token }}
+      # Upload to GitHub Release using the `gh` CLI.
+      # `dist/` contains the built packages, and the
+      # sigstore-produced signatures and certificates.
+      run: >-
+        gh release upload
+        '${{ github.ref_name }}' dist/**
+        --repo '${{ github.repository }}'

poethepoet/executor/base.py

@@ -151,16 +151,24 @@ def _execute_cmd(
         process. Using exec supports fewer options, and doesn't work on windows.
         """
 
-        if use_exec:
-            if input:
-                raise ExecutionError("Cannot exec task that requires input!")
-            if shell:
-                raise ExecutionError("Cannot exec task that requires shell!")
-            if not self._is_windows:
-                # execvpe doesn't work properly on windows so we just don't go there
-                return self._exec(cmd, env=env)
-
-        return self._exec_via_subproc(cmd, input=input, env=env, shell=shell)
+        try:
+            if use_exec:
+                if input:
+                    raise ExecutionError("Cannot exec task that requires input!")
+                if shell:
+                    raise ExecutionError("Cannot exec task that requires shell!")
+                if not self._is_windows:
+                    # execvpe doesn't work properly on windows so we just don't go there
+                    return self._exec(cmd, env=env)
+
+            return self._exec_via_subproc(cmd, input=input, env=env, shell=shell)
+        except FileNotFoundError as error:
+            return self._handle_file_not_found(cmd, error)
+
+    def _handle_file_not_found(
+        self, cmd: Sequence[str], error: FileNotFoundError
+    ) -> int:
+        raise PoeException(f"executable {cmd[0]!r} could not be found") from error
 
     def _exec(
         self,

poethepoet/executor/poetry.py

@@ -2,6 +2,7 @@
 from pathlib import Path
 from typing import Dict, Optional, Sequence, Type
 
+from ..exceptions import PoeException
 from .base import PoeExecutor
 
 
@@ -46,6 +47,15 @@ def execute(
             use_exec=use_exec,
         )
 
+    def _handle_file_not_found(
+        self, cmd: Sequence[str], error: FileNotFoundError
+    ) -> int:
+        poetry_env = self._get_poetry_virtualenv()
+        error_context = f" using virtualenv {poetry_env!r}" if poetry_env else ""
+        raise PoeException(
+            f"executable {cmd[0]!r} could not be found{error_context}"
+        ) from error
+
     def _get_poetry_virtualenv(self, force: bool = True):
         """
         Ask poetry where it put the virtualenv for this project.

poethepoet/executor/virtualenv.py

@@ -30,6 +30,15 @@ def execute(
             use_exec=use_exec,
         )
 
+    def _handle_file_not_found(
+        self, cmd: Sequence[str], error: FileNotFoundError
+    ) -> int:
+        venv = self._resolve_virtualenv()
+        error_context = f" using virtualenv {str(venv.path)!r}" if venv else ""
+        raise PoeException(
+            f"executable {cmd[0]!r} could not be found{error_context}"
+        ) from error
+
     def _resolve_virtualenv(self) -> "Virtualenv":
         from ..virtualenv import Virtualenv