fix provider concurrent environment map accesses

.github/workflows/ci.yml

@@ -190,6 +190,9 @@ jobs:
           check-latest: true
           cache: true
 
+      - name: Build example provider
+        run: make example-provider
+
       - name: Build
         uses: docker/bake-action@v6
         with:

Makefile

@@ -74,7 +74,7 @@ install: binary
 	install $(or $(DESTDIR),./bin/build)/docker-compose ~/.docker/cli-plugins/docker-compose
 
 .PHONY: e2e-compose
-e2e-compose: ## Run end to end local tests in plugin mode. Set E2E_TEST=TestName to run a single test
+e2e-compose: example-provider ## Run end to end local tests in plugin mode. Set E2E_TEST=TestName to run a single test
 	go run gotest.tools/gotestsum@latest --format testname --junitfile "/tmp/report/report.xml" -- -v $(TEST_FLAGS) -count=1 ./pkg/e2e
 
 .PHONY: e2e-compose-standalone
@@ -87,6 +87,10 @@ build-and-e2e-compose: build e2e-compose ## Compile the compose cli-plugin and r
 .PHONY: build-and-e2e-compose-standalone
 build-and-e2e-compose-standalone: build e2e-compose-standalone ## Compile the compose cli-plugin and run End to end local tests in standalone mode. Set E2E_TEST=TestName to run a single test
 
+.PHONY: example-provider
+example-provider: ## build example provider for e2e tests
+	go build -o bin/build/example-provider docs/examples/provider.go
+
 .PHONY: mocks
 mocks:
 	mockgen --version >/dev/null 2>&1 || go install go.uber.org/mock/[email protected]

docs/examples/provider.go

@@ -39,20 +39,30 @@ func main() {
 	}
 }
 
+type options struct {
+	db   string
+	size int
+}
+
 func composeCommand() *cobra.Command {
 	c := &cobra.Command{
 		Use:              "compose EVENT",
 		TraverseChildren: true,
 	}
 	c.PersistentFlags().String("project-name", "", "compose project name") // unused
+
+	var options options
 	upCmd := &cobra.Command{
-		Use:  "up",
-		Run:  up,
+		Use: "up",
+		Run: func(_ *cobra.Command, args []string) {
+			up(options, args)
+		},
 		Args: cobra.ExactArgs(1),
 	}
-	upCmd.Flags().String("type", "", "Database type (mysql, postgres, etc.)")
+
+	upCmd.Flags().StringVar(&options.db, "type", "", "Database type (mysql, postgres, etc.)")
 	_ = upCmd.MarkFlagRequired("type")
-	upCmd.Flags().Int("size", 10, "Database size in GB")
+	upCmd.Flags().IntVar(&options.size, "size", 10, "Database size in GB")
 	upCmd.Flags().String("name", "", "Name of the database to be created")
 	_ = upCmd.MarkFlagRequired("name")
 
@@ -71,13 +81,13 @@ func composeCommand() *cobra.Command {
 
 const lineSeparator = "\n"
 
-func up(_ *cobra.Command, args []string) {
+func up(options options, args []string) {
 	servicename := args[0]
 	fmt.Printf(`{ "type": "debug", "message": "Starting %s" }%s`, servicename, lineSeparator)
 
-	for i := 0; i < 100; i += 10 {
+	for i := 0; i < options.size; i += 10 {
 		time.Sleep(1 * time.Second)
-		fmt.Printf(`{ "type": "info", "message": "Processing ... %d%%" }%s`, i, lineSeparator)
+		fmt.Printf(`{ "type": "info", "message": "Processing ... %d%%" }%s`, i*100/options.size, lineSeparator)
 	}
 	fmt.Printf(`{ "type": "setenv", "message": "URL=https://magic.cloud/%s" }%s`, servicename, lineSeparator)
 }

pkg/compose/plugins.go

@@ -27,16 +27,18 @@ import (
 	"os/exec"
 	"path/filepath"
 	"strings"
+	"sync"
 
-	"github.com/compose-spec/compose-go/v2/types"
-	"github.com/docker/cli/cli-plugins/manager"
-	"github.com/docker/cli/cli-plugins/socket"
-	"github.com/docker/cli/cli/config"
 	"github.com/docker/compose/v2/pkg/progress"
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 	"go.opentelemetry.io/otel"
 	"go.opentelemetry.io/otel/propagation"
+
+	"github.com/compose-spec/compose-go/v2/types"
+	"github.com/docker/cli/cli-plugins/manager"
+	"github.com/docker/cli/cli-plugins/socket"
+	"github.com/docker/cli/cli/config"
 )
 
 type JsonMessage struct {
@@ -52,6 +54,8 @@ const (
 	providerMetadataDirectory = "compose/providers"
 )
 
+var mux sync.Mutex
+
 func (s *composeService) runPlugin(ctx context.Context, project *types.Project, service types.ServiceConfig, command string) error {
 	provider := *service.Provider
 
@@ -70,6 +74,8 @@ func (s *composeService) runPlugin(ctx context.Context, project *types.Project,
 		return err
 	}
 
+	mux.Lock()
+	defer mux.Unlock()
 	for name, s := range project.Services {
 		if _, ok := s.DependsOn[service.Name]; ok {
 			prefix := strings.ToUpper(service.Name) + "_"

pkg/e2e/fixtures/providers/depends-on-multiple-providers.yaml

@@ -0,0 +1,21 @@
+services:
+  test:
+    image: alpine
+    command: env
+    depends_on:
+      - provider1
+      - provider2
+  provider1:
+    provider:
+      type: example-provider
+      options:
+        name: provider1
+        type: test1
+        size: 1
+  provider2:
+    provider:
+      type: example-provider
+      options:
+        name: provider2
+        type: test2
+        size: 2

pkg/e2e/providers_test.go

@@ -0,0 +1,64 @@
+/*
+   Copyright 2020 Docker Compose CLI authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package e2e
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"path/filepath"
+	"slices"
+	"strings"
+	"testing"
+
+	"gotest.tools/v3/assert"
+	"gotest.tools/v3/icmd"
+)
+
+func TestDependsOnMultipleProviders(t *testing.T) {
+	provider, err := findExecutable("example-provider")
+	assert.NilError(t, err)
+
+	path := fmt.Sprintf("%s%s%s", os.Getenv("PATH"), string(os.PathListSeparator), filepath.Dir(provider))
+	c := NewParallelCLI(t, WithEnv("PATH="+path))
+	const projectName = "depends-on-multiple-providers"
+	t.Cleanup(func() {
+		c.cleanupWithDown(t, projectName)
+	})
+
+	res := c.RunDockerComposeCmd(t, "-f", "fixtures/providers/depends-on-multiple-providers.yaml", "--project-name", projectName, "up")
+	res.Assert(t, icmd.Success)
+	env := getEnv(res.Combined(), false)
+	assert.Check(t, slices.Contains(env, "PROVIDER1_URL=https://magic.cloud/provider1"), env)
+	assert.Check(t, slices.Contains(env, "PROVIDER2_URL=https://magic.cloud/provider2"), env)
+}
+
+func getEnv(out string, run bool) []string {
+	var env []string
+	scanner := bufio.NewScanner(strings.NewReader(out))
+	for scanner.Scan() {
+		line := scanner.Text()
+		if !run && strings.HasPrefix(line, "test-1  | ") {
+			env = append(env, line[10:])
+		}
+		if run && strings.Contains(line, "=") && len(strings.Split(line, "=")) == 2 {
+			env = append(env, line)
+		}
+	}
+	slices.Sort(env)
+	return env
+}