Handle * when resolving paths in watch path

Signed-off-by: Joana Hrotkó <joana.hrotko@gmail.com>

Author: jhrotko

loader/loader_test.go

@@ -3097,7 +3097,8 @@ services:
 }
 
 func TestLoadDevelopConfig(t *testing.T) {
-	project, err := Load(buildConfigDetails(`
+	t.Run("successfully load watch config", func(t *testing.T) {
+		project, err := Load(buildConfigDetails(`
 name: load-develop
 services:
   frontend:
@@ -3112,7 +3113,6 @@ services:
           target: /var/www
           ignore:
             - node_modules/
-
   backend:
     image: example/backend
     build: ./backend
@@ -3123,7 +3123,6 @@ services:
           path:
             - ./backend/src
             - ./backend
-          
   proxy:
     image: example/proxy
     build: ./proxy
@@ -3134,67 +3133,103 @@ services:
           action: sync+restart
           target: /etc/nginx/proxy.conf
 `, nil), func(options *Options) {
-		options.ResolvePaths = false
-		options.SkipValidation = true
-	})
-	assert.NilError(t, err)
-	frontend, err := project.GetService("frontend")
-	assert.NilError(t, err)
-	assert.DeepEqual(t, *frontend.Develop, types.DevelopConfig{
-		Watch: []types.Trigger{
-			{
-				Path:   []string{"./webapp/html"},
-				Action: types.WatchActionSync,
-				Target: "/var/www",
-				Ignore: []string{"node_modules/"},
-				Extensions: types.Extensions{
-					"x-initialSync": true,
+			options.ResolvePaths = false
+			options.SkipValidation = true
+		})
+		assert.NilError(t, err)
+		frontend, err := project.GetService("frontend")
+		assert.NilError(t, err)
+		assert.DeepEqual(t, *frontend.Develop, types.DevelopConfig{
+			Watch: []types.Trigger{
+				{
+					Path:   []string{"./webapp/html"},
+					Action: types.WatchActionSync,
+					Target: "/var/www",
+					Ignore: []string{"node_modules/"},
+					Extensions: types.Extensions{
+						"x-initialSync": true,
+					},
 				},
 			},
-		},
-	})
-	backend, err := project.GetService("backend")
-	assert.NilError(t, err)
-	assert.DeepEqual(t, *backend.Develop, types.DevelopConfig{
-		Watch: []types.Trigger{
-			{
-				Path:   []string{"./backend/src", "./backend"},
-				Action: types.WatchActionRebuild,
+		})
+		backend, err := project.GetService("backend")
+		assert.NilError(t, err)
+		assert.DeepEqual(t, *backend.Develop, types.DevelopConfig{
+			Watch: []types.Trigger{
+				{
+					Path:   []string{"./backend/src", "./backend"},
+					Action: types.WatchActionRebuild,
+				},
 			},
-		},
-	})
-	proxy, err := project.GetService("proxy")
-	assert.NilError(t, err)
-	assert.DeepEqual(t, *proxy.Develop, types.DevelopConfig{
-		Watch: []types.Trigger{
-			{
-				Path:   []string{"./proxy/proxy.conf"},
-				Action: types.WatchActionSyncRestart,
-				Target: "/etc/nginx/proxy.conf",
+		})
+		proxy, err := project.GetService("proxy")
+		assert.NilError(t, err)
+		assert.DeepEqual(t, *proxy.Develop, types.DevelopConfig{
+			Watch: []types.Trigger{
+				{
+					Path:   []string{"./proxy/proxy.conf"},
+					Action: types.WatchActionSyncRestart,
+					Target: "/etc/nginx/proxy.conf",
+				},
 			},
-		},
+		})
 	})
-}
 
-func TestBadDevelopConfig(t *testing.T) {
-	_, err := LoadWithContext(context.TODO(), buildConfigDetails(`
+	t.Run("should not load successfully bad watch config", func(t *testing.T) {
+		_, err := LoadWithContext(context.TODO(), buildConfigDetails(`
 name: load-develop
 services:
   frontend:
     image: example/webapp
     build: ./webapp
     develop:
       watch:
-        # sync static content
+      # sync static content
         - path: ./webapp/html
           target: /var/www
           ignore:
             - node_modules/
-
 `, nil), func(options *Options) {
-		options.ResolvePaths = false
+			options.ResolvePaths = false
+		})
+		assert.ErrorContains(t, err, "validating filename0.yml: services.frontend.develop.watch.0 action is required")
+	})
+
+	t.Run("should return an error when cannot resolve path", func(t *testing.T) {
+		b, err := os.ReadFile("testdata/watch/compose-test-watch-star.yaml")
+		assert.NilError(t, err)
+
+		configDetails := types.ConfigDetails{
+			WorkingDir: "testdata",
+			ConfigFiles: []types.ConfigFile{
+				{Filename: "watch/compose-test-watch-star.yaml", Content: b},
+			},
+			Environment: map[string]string{},
+		}
+		expServices := types.Services{
+			"app": {
+				Name:        "app",
+				Image:       "example/app",
+				Environment: types.MappingWithEquals{},
+				Networks:    map[string]*types.ServiceNetworkConfig{"default": nil},
+				Develop: &types.DevelopConfig{
+					Watch: []types.Trigger{
+						{
+							Path: []string{
+								"testdata/watch/other.txt",
+								"testdata/watch/some-text.txt",
+							},
+							Action: types.WatchActionRebuild,
+						},
+					},
+				},
+			},
+		}
+
+		actual, err := Load(configDetails)
+		assert.NilError(t, err)
+		assert.DeepEqual(t, actual.Services, expServices)
 	})
-	assert.ErrorContains(t, err, "validating filename0.yml: services.frontend.develop.watch.0 action is required")
 }
 
 func TestBadServiceConfig(t *testing.T) {

loader/testdata/watch/compose-test-watch-star.yaml

@@ -0,0 +1,11 @@
+name: compose-test-watch-star
+services:
+  app:
+    image: example/app
+    develop:
+      watch:
+        - path: ./watch/*.txt
+          action: rebuild
+        # - path: ./watch/*
+        #   target: ./app
+        #   action: sync

loader/testdata/watch/other.txt

@@ -173,7 +173,7 @@ func checkConsistency(project *types.Project) error {
 
 					}
 					if len(watch.Path) > 1 {
-						return fmt.Errorf("services.%s.develop.watch: can only use more than one path for actions %s and %s: %w", s.Name, types.WatchActionRebuild, types.WatchActionRestart, errdefs.ErrInvalid)
+						return fmt.Errorf("services.%s.develop.watch: detected multiple paths %s for action %s. Multiple files are only valid for %s and %s actions: %w", s.Name, watch.Path, watch.Action, types.WatchActionRebuild, types.WatchActionRestart, errdefs.ErrInvalid)
 					}
 				}
 			}

loader/testdata/watch/some-text.txt

@@ -396,7 +396,7 @@ func TestValidateWatch(t *testing.T) {
 				},
 			}
 			err := checkConsistency(&project)
-			assert.Error(t, err, "services.myservice.develop.watch: can only use more than one path for actions rebuild and restart: invalid compose project")
+			assert.ErrorContains(t, err, "services.myservice.develop.watch: detected multiple paths")
 		})
 	}
 	tests = []WatchActionTest{

loader/validate.go

@@ -17,6 +17,7 @@
 package paths
 
 import (
+	"fmt"
 	"path"
 	"path/filepath"
 
@@ -49,9 +50,41 @@ func (r *relativePathsResolver) absSymbolicLink(value any) (any, error) {
 	if err != nil {
 		return nil, err
 	}
-	str, ok := abs.(string)
-	if !ok {
-		return abs, nil
+	switch t := abs.(type) {
+	case string:
+		// this can return []string if * matches more than one file
+		return resolveAbsStarPath(t)
+	case []any:
+		var res []any
+		for _, tt := range t {
+			s, _ := tt.(string)
+			r, err := resolveAbsStarPath(s)
+			if err != nil {
+				return nil, err
+			}
+			res = append(res, r...)
+		}
+		return res, nil
+	}
+
+	return abs, nil
+}
+
+func resolveAbsStarPath(t string) ([]any, error) {
+	matches, err := filepath.Glob(t)
+	if err != nil {
+		return nil, err
+	}
+	if len(matches) == 0 {
+		return nil, fmt.Errorf("could not resolve %s. Please make sure it exists?", t)
+	}
+	res := make([]any, len(matches))
+	for i, m := range matches {
+		symb, err := utils.ResolveSymbolicLink(m)
+		if err != nil {
+			return nil, err
+		}
+		res[i] = symb
 	}
-	return utils.ResolveSymbolicLink(str)
+	return res, nil
 }

loader/validate_test.go

@@ -36,6 +36,7 @@ func init() {
 	transformers["services.*.networks"] = transformServiceNetworks
 	transformers["services.*.volumes.*"] = transformVolumeMount
 	transformers["services.*.dns"] = transformStringOrList
+	transformers["services.*.develop.watch.*.path"] = transformStringOrList
 	transformers["services.*.devices.*"] = transformDeviceMapping
 	transformers["services.*.secrets.*"] = transformFileMount
 	transformers["services.*.configs.*"] = transformFileMount