expand additional context relative paths

Signed-off-by: Nicolas De Loof <[email protected]>

Author: ndeloof

loader/full-struct_test.go

@@ -57,7 +57,7 @@ func services(workingDir, homeDir string) []types.ServiceConfig {
 				Target:             "foo",
 				Network:            "foo",
 				CacheFrom:          []string{"foo", "bar"},
-				AdditionalContexts: map[string]*string{"foo": strPtr("/bar")},
+				AdditionalContexts: types.Mapping{"foo": "/bar"},
 				Labels:             map[string]string{"FOO": "BAR"},
 				Secrets: []types.ServiceSecretConfig{
 					{

loader/normalize.go

@@ -75,14 +75,23 @@ func Normalize(project *types.Project, resolvePaths bool) error {
 			if s.Build.Dockerfile == "" && s.Build.DockerfileInline == "" {
 				s.Build.Dockerfile = "Dockerfile"
 			}
-			localContext := absPath(project.WorkingDir, s.Build.Context)
-			if _, err := os.Stat(localContext); err == nil {
-				if resolvePaths {
+			if resolvePaths {
+				// Build context might be a remote http/git context. Unfortunately supported "remote"
+				// syntax is highly ambiguous in moby/moby and not defined by compose-spec,
+				// so let's assume runtime will check
+				localContext := absPath(project.WorkingDir, s.Build.Context)
+				if _, err := os.Stat(localContext); err == nil {
 					s.Build.Context = localContext
 				}
-				// } else {
-				// might be a remote http/git context. Unfortunately supported "remote" syntax is highly ambiguous
-				// in moby/moby and not defined by compose-spec, so let's assume runtime will check
+				for name, path := range s.Build.AdditionalContexts {
+					if strings.Contains(path, "://") { // `docker-image://` or any builder specific context type
+						continue
+					}
+					path = absPath(project.WorkingDir, path)
+					if _, err := os.Stat(path); err == nil {
+						s.Build.AdditionalContexts[name] = path
+					}
+				}
 			}
 			s.Build.Args = s.Build.Args.Resolve(fn)
 		}

loader/normalize_test.go

@@ -241,3 +241,55 @@ networks:
 	assert.NilError(t, err)
 	assert.Equal(t, expected, string(marshal))
 }
+
+func TestNormalizeAdditionalContexts(t *testing.T) {
+	project := types.Project{
+		Name: "myProject",
+		Services: types.Services{
+			types.ServiceConfig{
+				Name: "test",
+				Build: &types.BuildConfig{
+					Context:    ".",
+					Dockerfile: "Dockerfile",
+					AdditionalContexts: map[string]string{
+						"image":    "docker-image://foo",
+						"oci":      "oci-layout://foo",
+						"abs_path": "/tmp",
+						"rel_path": "./testdata",
+					},
+				},
+			},
+		},
+	}
+
+	absCwd, _ := filepath.Abs(".")
+	expected := types.Project{
+		Name: "myProject",
+		Services: types.Services{
+			types.ServiceConfig{
+				Name: "test",
+				Build: &types.BuildConfig{
+					Context:    absCwd,
+					Dockerfile: "Dockerfile",
+					AdditionalContexts: map[string]string{
+						"image":    "docker-image://foo",
+						"oci":      "oci-layout://foo",
+						"abs_path": "/tmp",
+						"rel_path": filepath.Join(absCwd, "testdata"),
+					},
+				},
+				Networks: map[string]*types.ServiceNetworkConfig{
+					"default": nil,
+				},
+			},
+		},
+		Networks: types.Networks{"default": types.NetworkConfig{
+			Name: "myProject_default",
+		}},
+		WorkingDir:   absCwd,
+		ComposeFiles: []string{},
+	}
+	err := Normalize(&project, true)
+	assert.NilError(t, err)
+	assert.DeepEqual(t, expected, project)
+}

types/types.go

@@ -303,7 +303,7 @@ type BuildConfig struct {
 	CacheFrom          StringList            `mapstructure:"cache_from" yaml:"cache_from,omitempty" json:"cache_from,omitempty"`
 	CacheTo            StringList            `mapstructure:"cache_to" yaml:"cache_to,omitempty" json:"cache_to,omitempty"`
 	NoCache            bool                  `mapstructure:"no_cache" yaml:"no_cache,omitempty" json:"no_cache,omitempty"`
-	AdditionalContexts MappingWithEquals     `mapstructure:"additional_contexts" yaml:"additional_contexts,omitempty" json:"additional_contexts,omitempty"`
+	AdditionalContexts Mapping               `mapstructure:"additional_contexts" yaml:"additional_contexts,omitempty" json:"additional_contexts,omitempty"`
 	Pull               bool                  `mapstructure:"pull" yaml:"pull,omitempty" json:"pull,omitempty"`
 	ExtraHosts         HostsList             `mapstructure:"extra_hosts" yaml:"extra_hosts,omitempty" json:"extra_hosts,omitempty"`
 	Isolation          string                `yaml:",omitempty" json:"isolation,omitempty"`