Add a script and workflow to bump the func-python version

.github/workflows/update-python-platform.yaml

@@ -0,0 +1,45 @@
+name: Update func-python version in embedded templates
+
+permissions:
+  contents: write
+  pull-requests: write
+
+on:
+  schedule:
+    - cron: "0 6 * * *" # Daily at 06:00.
+  workflow_dispatch: # Manual workflow trigger
+
+jobs:
+  update:
+    name: Update func-python version
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: knative/actions/setup-go@main
+
+      - name: Run update script
+        run: go run ./hack/cmd/update-python-platform/main.go
+
+      - name: Run make generate
+        run: make generate/zz_filesystem_generated.go
+
+      - name: Run smoke tests
+        run: make test-python
+
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v7
+        with:
+          token: ${{ github.token }}
+          commit-message: 'chore: update func-python version'
+          title: 'chore: update func-python version'
+          body: |
+            This PR updates the func-python version in the Python scaffolding templates to the latest version available on PyPI.
+
+            This PR was automatically generated by the [update-python-platform workflow](https://github.com/${{ github.repository }}/actions/workflows/update-python-platform.yaml).
+          branch: update-func-python
+          delete-branch: true
+          committer: Knative Automation <automation@knative.team>
+          author: Knative Automation <automation@knative.team>
+          assignees: gauron99, matejvasek, lkingland
+          base: main

hack/cmd/update-python-platform/main.go

@@ -0,0 +1,153 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"os"
+	"os/signal"
+	"regexp"
+	"syscall"
+)
+
+const (
+	funcPythonPackage      = "func-python"
+	funcPythonVersionRegex = `"func-python[~^=><!]*([0-9]+\.[0-9]+\.[0-9]+)?"`
+)
+
+var pyprojectPaths = []string{
+	"templates/python/scaffolding/instanced-http/pyproject.toml",
+	"templates/python/scaffolding/instanced-cloudevents/pyproject.toml",
+}
+
+type PyPIRelease struct {
+	Info struct {
+		Version string `json:"version"`
+	} `json:"info"`
+}
+
+func main() {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	sigs := make(chan os.Signal, 1)
+	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
+	go func() {
+		<-sigs
+		cancel()
+		<-sigs
+		os.Exit(130)
+	}()
+
+	if err := run(ctx); err != nil {
+		fmt.Fprintf(os.Stderr, "ERROR: %v\n", err)
+		os.Exit(1)
+	}
+}
+
+func run(ctx context.Context) error {
+	// Get latest version from PyPI
+	latestVersion, err := getLatestPyPIVersion(ctx, funcPythonPackage)
+	if err != nil {
+		return fmt.Errorf("cannot get latest version from PyPI: %w", err)
+	}
+
+	fmt.Printf("Latest %s version on PyPI: %s\n", funcPythonPackage, latestVersion)
+
+	// Check current versions in pyproject.toml files
+	allUpToDate := true
+	for _, path := range pyprojectPaths {
+		currentVersion, err := getVersionFromPyproject(path)
+		if err != nil {
+			return fmt.Errorf("cannot get version from %s: %w", path, err)
+		}
+
+		fmt.Printf("Current version in %s: %q\n", path, currentVersion)
+
+		if currentVersion != latestVersion {
+			allUpToDate = false
+		}
+	}
+
+	if allUpToDate {
+		fmt.Println("func-python is up-to-date!")
+		return nil
+	}
+
+	// Update files
+	if err := updateFiles(latestVersion); err != nil {
+		return err
+	}
+
+	fmt.Println("Files updated successfully!")
+	return nil
+}
+
+func getLatestPyPIVersion(ctx context.Context, packageName string) (string, error) {
+	url := fmt.Sprintf("https://pypi.org/pypi/%s/json", packageName)
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
+	if err != nil {
+		return "", err
+	}
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return "", fmt.Errorf("PyPI returned status %d", resp.StatusCode)
+	}
+
+	var release PyPIRelease
+	if err := json.NewDecoder(resp.Body).Decode(&release); err != nil {
+		return "", err
+	}
+
+	return release.Info.Version, nil
+}
+
+func getVersionFromPyproject(path string) (string, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return "", err
+	}
+
+	re := regexp.MustCompile(funcPythonVersionRegex)
+	matches := re.FindSubmatch(data)
+	if len(matches) < 2 {
+		return "", fmt.Errorf("cannot find func-python dependency in %s", path)
+	}
+
+	// If no version is specified, return empty string
+	if len(matches[1]) == 0 {
+		return "", nil
+	}
+
+	return string(matches[1]), nil
+}
+
+func updateFiles(newVersion string) error {
+	for _, path := range pyprojectPaths {
+		if err := updatePyproject(path, newVersion); err != nil {
+			return fmt.Errorf("cannot update %s: %w", path, err)
+		}
+		fmt.Printf("Updated %s to version %s\n", path, newVersion)
+	}
+	return nil
+}
+
+func updatePyproject(path, newVersion string) error {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return err
+	}
+
+	// Replace func-python version
+	re := regexp.MustCompile(funcPythonVersionRegex)
+	newData := re.ReplaceAll(data, []byte(fmt.Sprintf(`"func-python==%s"`, newVersion)))
+
+	return os.WriteFile(path, newData, 0644)
+}