feat: Initial support for Compose configs (#116)

pkg/client/compose/config.go

@@ -0,0 +1,75 @@
+package compose
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/compose-spec/compose-go/v2/types"
+	"github.com/psviderski/uncloud/pkg/api"
+)
+
+// TODO: add support for short syntax configs
+func configSpecsFromCompose(
+	configs types.Configs, serviceConfigs []types.ServiceConfigObjConfig, workingDir string,
+) ([]api.ConfigSpec, []api.ConfigMount, error) {
+	var configSpecs []api.ConfigSpec
+	var configMounts []api.ConfigMount
+
+	for _, serviceConfig := range serviceConfigs {
+		var spec api.ConfigSpec
+
+		if projectConfig, exists := configs[serviceConfig.Source]; exists {
+			if projectConfig.External {
+				return nil, nil, fmt.Errorf("external configs are not supported: %s",
+					serviceConfig.Source)
+			}
+
+			spec = api.ConfigSpec{
+				Name:    serviceConfig.Source,
+				Content: []byte(projectConfig.Content),
+			}
+
+			// If File is specified, read the file contents
+			if projectConfig.File != "" {
+				configPath := projectConfig.File
+				// TODO: handle this in a separate function?
+				if !filepath.IsAbs(configPath) {
+					configPath = filepath.Join(workingDir, configPath)
+				}
+
+				fileContent, err := os.ReadFile(configPath)
+				if err != nil {
+					return nil, nil, fmt.Errorf("read config from file '%s': %w", projectConfig.File, err)
+				}
+				spec.Content = fileContent
+			}
+		} else {
+			return nil, nil, fmt.Errorf("config '%s' not found in project configs", serviceConfig.Source)
+		}
+
+		configSpecs = append(configSpecs, spec)
+
+		// Create config mount
+		target := serviceConfig.Target
+		if target == "" {
+			target = "/" + serviceConfig.Source // Default mount path
+		}
+
+		mount := api.ConfigMount{
+			ConfigName:    spec.Name,
+			ContainerPath: target,
+			Uid:           serviceConfig.UID,
+			Gid:           serviceConfig.GID,
+		}
+
+		if serviceConfig.Mode != nil {
+			mode := os.FileMode(*serviceConfig.Mode)
+			mount.Mode = &mode
+		}
+
+		configMounts = append(configMounts, mount)
+	}
+
+	return configSpecs, configMounts, nil
+}

pkg/client/compose/config_test.go

@@ -0,0 +1,114 @@
+package compose
+
+import (
+	"os"
+	"testing"
+
+	"github.com/compose-spec/compose-go/v2/types"
+	"github.com/psviderski/uncloud/pkg/api"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestConfigSpecsFromCompose(t *testing.T) {
+	tests := []struct {
+		name           string
+		configs        types.Configs
+		serviceConfigs []types.ServiceConfigObjConfig
+		expectedSpecs  []api.ConfigSpec
+		expectedMounts []api.ConfigMount
+		expectError    bool
+	}{
+		{
+			name: "project-level config with file",
+			configs: types.Configs{
+				"app-config": types.ConfigObjConfig{
+					File: "testdata/config1.txt",
+				},
+			},
+			serviceConfigs: []types.ServiceConfigObjConfig{
+				{
+					Source: "app-config",
+					Target: "/app/config.json",
+					UID:    "1000",
+					GID:    "1000",
+				},
+			},
+			expectedSpecs: []api.ConfigSpec{
+				{
+					Name:    "app-config",
+					Content: []byte("test config content\n"),
+				},
+			},
+			expectedMounts: []api.ConfigMount{
+				{
+					ConfigName:    "app-config",
+					ContainerPath: "/app/config.json",
+					Uid:           "1000",
+					Gid:           "1000",
+				},
+			},
+		},
+		{
+			name: "config with mode",
+			configs: types.Configs{
+				"nginx-config": types.ConfigObjConfig{
+					File: "./testdata/nginx.conf",
+				},
+			},
+			serviceConfigs: []types.ServiceConfigObjConfig{
+				{
+					Source: "nginx-config",
+					Target: "/etc/nginx/nginx.conf",
+					Mode:   func() *uint32 { m := uint32(0o644); return &m }(),
+				},
+			},
+			expectedSpecs: []api.ConfigSpec{
+				{
+					Name:    "nginx-config",
+					Content: []byte("user nginx;\nworker_processes auto;\n"),
+				},
+			},
+			expectedMounts: []api.ConfigMount{
+				{
+					ConfigName:    "nginx-config",
+					ContainerPath: "/etc/nginx/nginx.conf",
+					Mode:          func() *os.FileMode { m := os.FileMode(0o644); return &m }(),
+				},
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			configSpecs, configMounts, err := configSpecsFromCompose(tt.configs, tt.serviceConfigs, ".")
+
+			if tt.expectError {
+				require.Error(t, err)
+				return
+			}
+
+			require.NoError(t, err)
+			assert.ElementsMatch(t, tt.expectedSpecs, configSpecs)
+			assert.Equal(t, tt.expectedMounts, configMounts)
+		})
+	}
+}
+
+func TestConfigSpecEquals(t *testing.T) {
+	config1 := api.ConfigSpec{
+		Name: "test-config",
+	}
+
+	config2 := api.ConfigSpec{
+		Name: "test-config",
+	}
+
+	config3 := api.ConfigSpec{
+		Name:    "test-config",
+		Content: []byte("some content"),
+	}
+
+	assert.True(t, config1.Equals(config2))
+	assert.False(t, config1.Equals(config3))
+}

pkg/client/compose/service.go

@@ -105,6 +105,15 @@ func ServiceSpecFromCompose(project *types.Project, serviceName string) (api.Ser
 	spec.Volumes = volumeSpecs
 	spec.Container.VolumeMounts = volumeMounts
 
+	// Parse configs
+	configSpecs, configMounts, err := configSpecsFromCompose(project.Configs, service.Configs, project.WorkingDir)
+	if err != nil {
+		return spec, err
+	}
+
+	spec.Configs = configSpecs
+	spec.Container.ConfigMounts = configMounts
+
 	return spec, nil
 }
 

pkg/client/compose/testdata/config1.txt

@@ -0,0 +1 @@
+test config content

pkg/client/compose/testdata/nginx.conf

@@ -0,0 +1,2 @@
+user nginx;
+worker_processes auto;