feat: Add generate command

cmd/iacker/main.go

@@ -3,23 +3,12 @@ package main
 import (
 	"fmt"
 
-	"github.com/spf13/cobra"
+	"github.com/GuanceCloud/iacker/internal/cmd"
 )
 
 func main() {
-	rootCmd := NewRootCmd()
+	rootCmd := cmd.NewRootCmd()
 	if err := rootCmd.Execute(); err != nil {
 		fmt.Println(err)
 	}
 }
-
-func NewRootCmd() *cobra.Command {
-	return &cobra.Command{
-		Use:   "iacker",
-		Short: "The IaC Provider Development Framework",
-		Long:  `Help you to develop IaC provider easily.`,
-		Run: func(cmd *cobra.Command, args []string) {
-			fmt.Println("Hello, world!")
-		},
-	}
-}

cmd/iacker/main_test.go

@@ -3,11 +3,13 @@ package main
 import (
 	"bytes"
 	"testing"
+
+	"github.com/GuanceCloud/iacker/internal/cmd"
 )
 
 func TestMain(t *testing.T) {
 	var buf bytes.Buffer
-	rootCmd := NewRootCmd()
+	rootCmd := cmd.NewRootCmd()
 	rootCmd.SetOutput(&buf)
 	rootCmd.SetArgs([]string{"--help"})
 	if err := rootCmd.Execute(); err != nil {

examples/simple/manifest.cue

@@ -0,0 +1,61 @@
+package allinone
+
+import (
+	template "github.com/GuanceCloud/iacker/pkg/template/v1"
+)
+
+// Pet is the pet resource definition
+resources: "Pet": {
+	plural: "pets"
+	title: {
+		zh: "宠物"
+		en: "Pet"
+	}
+	description: {
+		zh: "宠物很可爱，包括猫猫狗狗等"
+		en: "Pets are cute, including cats, dogs, etc."
+	}
+	model: "Pet"
+}
+
+// Pet model
+resources: "Pet": models: "Pet": {
+	title: {
+		zh: "宠物"
+		en: "Pet"
+	}
+	properties: [
+		{
+			name: "id"
+			title: {
+				zh: "ID"
+				en: "ID"
+			}
+			schema: {
+				type:     "integer"
+				required: true
+			}
+		},
+	]
+}
+
+// Template definition
+templates: "foo": {
+	name: "basic"
+
+	inputs: template.#Inputs
+
+	diagnostics: [...template.#Diagnostic]
+
+	outputs: files: "README.md": {
+		content: "Hello, World!"
+	}
+}
+
+// Template options
+options: templates: [
+	{
+		template: "foo"
+		outdir:   ".build"
+	},
+]

go.mod

@@ -3,15 +3,33 @@ module github.com/GuanceCloud/iacker
 go 1.19
 
 require (
+	cuelang.org/go v0.6.0
+	github.com/fatih/color v1.15.0
 	github.com/hashicorp/go-multierror v1.1.1
 	github.com/magefile/mage v1.15.0
+	github.com/sergi/go-diff v1.3.1
 	github.com/spf13/cobra v1.7.0
+	github.com/stretchr/testify v1.8.4
 	google.golang.org/protobuf v1.31.0
 )
 
 require (
-	github.com/google/go-cmp v0.5.9 // indirect
+	github.com/cockroachdb/apd/v3 v3.2.0 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/emicklei/proto v1.10.0 // indirect
+	github.com/google/uuid v1.2.0 // indirect
 	github.com/hashicorp/errwrap v1.0.0 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.17 // indirect
+	github.com/mitchellh/go-wordwrap v1.0.1 // indirect
+	github.com/mpvl/unique v0.0.0-20150818121801-cbe035fff7de // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/protocolbuffers/txtpbfmt v0.0.0-20230328191034-3462fbc510c0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
+	golang.org/x/mod v0.9.0 // indirect
+	golang.org/x/net v0.8.0 // indirect
+	golang.org/x/sys v0.6.0 // indirect
+	golang.org/x/text v0.8.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,24 +1,79 @@
+cuelang.org/go v0.6.0 h1:dJhgKCog+FEZt7OwAYV1R+o/RZPmE8aqFoptmxSWyr8=
+cuelang.org/go v0.6.0/go.mod h1:9CxOX8aawrr3BgSdqPj7V0RYoXo7XIb+yDFC6uESrOQ=
+github.com/cockroachdb/apd/v3 v3.2.0 h1:79kHCn4tO0VGu3W0WujYrMjBDk8a2H4KEUYcXf7whcg=
+github.com/cockroachdb/apd/v3 v3.2.0/go.mod h1:klXJcjp+FffLTHlhIG69tezTDvdP065naDsHzKhYSqc=
 github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/emicklei/proto v1.10.0 h1:pDGyFRVV5RvV+nkBK9iy3q67FBy9Xa7vwrOTE+g5aGw=
+github.com/emicklei/proto v1.10.0/go.mod h1:rn1FgRS/FANiZdD2djyH7TMA9jdRDcYQ9IEN9yvjX0A=
+github.com/fatih/color v1.15.0 h1:kOqh6YHBtK8aywxGerMG2Eq3H6Qgoqeo13Bk2Mv/nBs=
+github.com/fatih/color v1.15.0/go.mod h1:0h5ZqXfHYED7Bhv2ZJamyIOUej9KtShiJESRwBDUSsw=
+github.com/go-quicktest/qt v1.100.0 h1:I7iSLgIwNp0E0UnSvKJzs7ig0jg/Iq83zsZjtQNW7jY=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
-github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/google/uuid v1.2.0 h1:qJYtXnJRWmpe7m/3XlyhrsLrEURqHRM2kxzoxXqyUDs=
+github.com/google/uuid v1.2.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
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 github.com/hashicorp/go-multierror v1.1.1 h1:H5DkEtf6CXdFp0N0Em5UCwQpXMWke8IA0+lD48awMYo=
 github.com/hashicorp/go-multierror v1.1.1/go.mod h1:iw975J/qwKPdAO1clOe2L8331t/9/fmwbPZ6JB6eMoM=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
+github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
+github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
+github.com/lib/pq v1.10.7 h1:p7ZhMD+KsSRozJr34udlUrhboJwWAgCg34+/ZZNvZZw=
 github.com/magefile/mage v1.15.0 h1:BvGheCMAsG3bWUDbZ8AyXXpCNwU9u5CB6sM+HNb9HYg=
 github.com/magefile/mage v1.15.0/go.mod h1:z5UZb/iS3GoOSn0JgWuiw7dxlurVYTu+/jHXqQg881A=
+github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
+github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
+github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
+github.com/mattn/go-isatty v0.0.17 h1:BTarxUcIeDqL27Mc+vyvdWYSL28zpIhv3RoTdsLMPng=
+github.com/mattn/go-isatty v0.0.17/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
+github.com/mitchellh/go-wordwrap v1.0.1 h1:TLuKupo69TCn6TQSyGxwI1EblZZEsQ0vMlAFQflz0v0=
+github.com/mitchellh/go-wordwrap v1.0.1/go.mod h1:R62XHJLzvMFRBbcrT7m7WgmE1eOyTSsCt+hzestvNj0=
+github.com/mpvl/unique v0.0.0-20150818121801-cbe035fff7de h1:D5x39vF5KCwKQaw+OC9ZPiLVHXz3UFw2+psEX+gYcto=
+github.com/mpvl/unique v0.0.0-20150818121801-cbe035fff7de/go.mod h1:kJun4WP5gFuHZgRjZUWWuH1DTxCtxbHDOIJsudS8jzY=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
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+github.com/protocolbuffers/txtpbfmt v0.0.0-20230328191034-3462fbc510c0/go.mod h1:jgxiZysxFPM+iWKwQwPR+y+Jvo54ARd4EisXxKYpB5c=
+github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
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 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
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 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
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 google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
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+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
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 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

internal/cmd/generate.go

@@ -0,0 +1,37 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/GuanceCloud/iacker/internal/cue"
+	"github.com/hashicorp/go-multierror"
+	"github.com/spf13/cobra"
+)
+
+// NewGenerateCmd returns a new generate command.
+func NewGenerateCmd() *cobra.Command {
+	generateCmd := &cobra.Command{
+		Use:     "generate",
+		Aliases: []string{"gen"},
+		Short:   "Generate code from CUE",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			var mErr error
+			if len(args) == 0 {
+				args = []string{"."}
+			}
+
+			// Generate all packages.
+			for _, root := range args {
+				rms, err := cue.ParsePackage(root)
+				if err != nil {
+					return err
+				}
+				if err := cue.Generate(rms); err != nil {
+					mErr = multierror.Append(mErr, fmt.Errorf("generate %s error: %w", root, err))
+				}
+			}
+			return mErr
+		},
+	}
+	return generateCmd
+}

internal/cmd/init.go

@@ -0,0 +1,19 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+// NewInitCmd returns a new init command.
+func NewInitCmd() *cobra.Command {
+	initCmd := &cobra.Command{
+		Use:   "init",
+		Short: "Initialize a new IaC provider project",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return fmt.Errorf("not implemented")
+		},
+	}
+	return initCmd
+}

internal/cmd/root.go

@@ -0,0 +1,19 @@
+package cmd
+
+import (
+	"github.com/spf13/cobra"
+)
+
+// NewRootCmd returns a new root command.
+func NewRootCmd() *cobra.Command {
+	root := &cobra.Command{
+		Use:   "iacker",
+		Short: "The IaC Provider Development Framework",
+		Long:  `Help you to develop IaC provider easily.`,
+	}
+	root.AddCommand(
+		NewInitCmd(),
+		NewGenerateCmd(),
+	)
+	return root
+}

internal/cue/generator.go

@@ -0,0 +1,97 @@
+package cue
+
+import (
+	"errors"
+	"fmt"
+	"path/filepath"
+
+	"cuelang.org/go/cue"
+	"github.com/fatih/color"
+	"github.com/hashicorp/go-multierror"
+
+	"github.com/GuanceCloud/iacker/internal/helpers/filediff"
+	templateV1 "github.com/GuanceCloud/iacker/pkg/template/v1"
+)
+
+type generator struct{}
+
+// GenerateOption is a function that configures a generator.
+type GenerateOption func(*generator) error
+
+// Generate will generate code files into the output folder
+func Generate(p *Package, options ...GenerateOption) error {
+	plan, err := GeneratePlan(p, options...)
+	if err != nil {
+		return fmt.Errorf("failed to generate plan: %w", err)
+	}
+	if err := plan.Pretty(); err != nil {
+		return fmt.Errorf("failed to pretty print plan: %w", err)
+	}
+	return plan.Save()
+}
+
+// GeneratePlan will generate a plan for generating code files into the output folder
+func GeneratePlan(p *Package, options ...GenerateOption) (*Plan, error) {
+	var mErr error
+	sourceFiles := make(map[string]string)
+	targetFiles := make(map[string]string)
+	rms := p.Manifest()
+
+	// Create generator
+	g := &generator{}
+	for _, option := range options {
+		if err := option(g); err != nil {
+			mErr = multierror.Append(mErr, fmt.Errorf("generate option failed: %w", err))
+		}
+	}
+
+	// Generate files from templates
+	for i, templateOptions := range rms.Options.Templates {
+		templateName := templateOptions.Template
+
+		color.Magenta("Generate template %q to folder %q", templateName, templateOptions.Outdir)
+
+		// Get the template
+		templateValue := p.value.LookupPath(cue.MakePath(cue.Str("templates"), cue.Str(templateName)))
+		if err := templateValue.Err(); err != nil {
+			return nil, fmt.Errorf("lookup path failed: %w", err)
+		}
+
+		// Fill the template with the input RMS data
+		concretTemplateValue := templateValue.FillPath(cue.MakePath(cue.Str("inputs")), &templateV1.Inputs{
+			Resources: rms.Resources,
+			Errors:    rms.Errors,
+			Vars:      templateOptions.Vars,
+		})
+		if err := concretTemplateValue.Err(); err != nil {
+			return nil, fmt.Errorf("fill path failed: %w", err)
+		}
+
+		// Check the template diagnostics
+		var concretTemplate templateV1.Manifest
+		if err := concretTemplateValue.Decode(&concretTemplate); err != nil {
+			return nil, fmt.Errorf("decode template %s(%d): %w", templateName, i, err)
+		}
+		for _, diag := range concretTemplate.Diagnostics {
+			mErr = multierror.Append(mErr, errors.New(diag.Message))
+		}
+
+		// Build the generate plan
+		files, err := filediff.ReadFiles(templateOptions.Outdir)
+		if err != nil {
+			return nil, fmt.Errorf("read existed files from outdir failed: %w", err)
+		}
+		for fileName, file := range files {
+			sourceFiles[filepath.Join(templateOptions.Outdir, fileName)] = file
+		}
+
+		for fileName, file := range concretTemplate.Outputs.Files {
+			targetFiles[filepath.Join(templateOptions.Outdir, fileName)] = file.Content
+		}
+	}
+	if mErr != nil {
+		return nil, mErr
+	}
+
+	return &Plan{sources: sourceFiles, targets: targetFiles}, nil
+}