dagger compute [--input-dir TARGET=DIR] [--input-string TARGET=STRING] [--input-cue CUE] [--input-git REMOTE#REF]

Signed-off-by: Solomon Hykes <sh.github.6811@hykes.org>

README.md

@@ -93,10 +93,7 @@ which hide the complexity of `dagger compute` (but it will always be available t
 Here is an example command, using an example configuration:
 
 ```
-$ dagger compute \
+$ dagger compute ./examples/simple --input-string www.host=mysuperapp.com --input-dir www.source=.
-	./examples/simple \
-	--input 'www: hostname: "www.mysuperapp.com"' \
-	--input 'www: source: #dagger: compute: [{do:"fetch-git", remote:"https://github.com/samalba/hello-go", ref:"master"}]'
 ```
 
 

cmd/dagger/cmd/compute.go

@@ -12,6 +12,12 @@ import (
 	"github.com/spf13/viper"
 )
 
+var (
+	env     *dagger.Env
+	input   *dagger.InputValue
+	updater *dagger.InputValue
+)
+
 var computeCmd = &cobra.Command{
 	Use:   "compute CONFIG",
 	Short: "Compute a configuration",
@@ -27,17 +33,24 @@ var computeCmd = &cobra.Command{
 		lg := logger.New()
 		ctx := lg.WithContext(appcontext.Context())
 
-		c, err := dagger.NewClient(ctx, dagger.ClientConfig{
+		if err := updater.SourceFlag().Set(args[0]); err != nil {
-			Input:   viper.GetString("input"),
+			lg.Fatal().Err(err).Msg("invalid local source")
-			Updater: localUpdater(args[0]),
+		}
-		})
+
+		if err := env.SetUpdater(updater.Value()); err != nil {
+			lg.Fatal().Err(err).Msg("invalid updater script")
+		}
+		lg.Debug().Str("input", input.Value().SourceUnsafe()).Msg("Setting input")
+		if err := env.SetInput(input.Value()); err != nil {
+			lg.Fatal().Err(err).Msg("invalid input")
+		}
+		lg.Debug().Str("env state", env.State().SourceUnsafe()).Msg("creating client")
+		c, err := dagger.NewClient(ctx, "")
 		if err != nil {
 			lg.Fatal().Err(err).Msg("unable to create client")
 		}
-		// FIXME: configure which config to compute (duh)
-		// FIXME: configure inputs
 		lg.Info().Msg("running")
-		output, err := c.Compute(ctx)
+		output, err := c.Compute(ctx, env)
 		if err != nil {
 			lg.Fatal().Err(err).Msg("failed to compute")
 		}
@@ -46,18 +59,35 @@ var computeCmd = &cobra.Command{
 	},
 }
 
-func localUpdater(dir string) string {
+func init() {
-	return fmt.Sprintf(`[
+	// Why is this stuff here?
-		{
+	// 1. input must be global for flag parsing
-			do: "local"
+	// 2. updater must be global for flag parsing
-			dir: "%s"
+	// 3. env must have same compiler as input & updater,
-			include: ["*.cue", "cue.mod"]
+	//   therefore it must be global too.
-		}
+	//
-	]`, dir)
+	// FIXME: roll up InputValue into Env?
+	var err error
+	env, err = dagger.NewEnv()
+	if err != nil {
+		panic(err)
 	}
 
-func init() {
+	// Setup --input-* flags
-	computeCmd.Flags().String("input", "", "Input overlay")
+	input, err = dagger.NewInputValue(env.Compiler(), "{}")
+	if err != nil {
+		panic(err)
+	}
+	computeCmd.Flags().Var(input.StringFlag(), "input-string", "TARGET=STRING")
+	computeCmd.Flags().Var(input.DirFlag(), "input-dir", "TARGET=PATH")
+	computeCmd.Flags().Var(input.GitFlag(), "input-git", "TARGET=REMOTE#REF")
+	computeCmd.Flags().Var(input.CueFlag(), "input-cue", "CUE")
+
+	// Setup (future) --from-* flags
+	updater, err = dagger.NewInputValue(env.Compiler(), "[...{do:string, ...}]")
+	if err != nil {
+		panic(err)
+	}
 
 	if err := viper.BindPFlags(computeCmd.Flags()); err != nil {
 		panic(err)

dagger/client.go

@@ -37,19 +37,26 @@ type Client struct {
 	c *bk.Client
 
 	localdirs map[string]string
-	cfg       ClientConfig
 }
 
-type ClientConfig struct {
+func NewClient(ctx context.Context, host string) (*Client, error) {
-	// Buildkit host address, eg. `docker://buildkitd`
+	if host == "" {
-	Host string
+		host = os.Getenv("BUILDKIT_HOST")
-	// Script to update the env config, eg . `[{do:"local",dir:"."}]`
+	}
-	Updater string
+	if host == "" {
-	// Input values to merge on the base config, eg. `www: source: #dagger: compute: [{do:"local",dir:"./src"}]`
+		host = defaultBuildkitHost
-	Input string
+	}
+	c, err := bk.New(ctx, host)
+	if err != nil {
+		return nil, errors.Wrap(err, "buildkit client")
+	}
+	return &Client{
+		c: c,
+	}, nil
 }
 
-func NewClient(ctx context.Context, cfg ClientConfig) (result *Client, err error) {
+// FIXME: return completed *Env, instead of *Value
+func (c *Client) Compute(ctx context.Context, env *Env) (o *Value, err error) {
 	lg := log.Ctx(ctx)
 	defer func() {
 		if err != nil {
@@ -57,26 +64,11 @@ func NewClient(ctx context.Context, cfg ClientConfig) (result *Client, err error
 			err = cueErr(err)
 		}
 	}()
-	// Load partial env client-side, to validate & scan local dirs
+	// Scan local dirs to grant access
-	env, err := NewEnv(cfg.Updater)
-	if err != nil {
-		return nil, errors.Wrap(err, "updater")
-	}
-	if err := env.SetInput(cfg.Input); err != nil {
-		return nil, errors.Wrap(err, "input")
-	}
 	localdirs, err := env.LocalDirs(ctx)
 	if err != nil {
 		return nil, errors.Wrap(err, "scan local dirs")
 	}
-	envsrc, err := env.state.SourceString()
-	if err != nil {
-		return nil, err
-	}
-	lg.Debug().
-		Str("func", "NewClient").
-		Str("env", envsrc).
-		Msg("loaded partial env client-side")
 	for label, dir := range localdirs {
 		abs, err := filepath.Abs(dir)
 		if err != nil {
@@ -84,32 +76,14 @@ func NewClient(ctx context.Context, cfg ClientConfig) (result *Client, err error
 		}
 		localdirs[label] = abs
 	}
-	// Configure buildkit client
+	c.localdirs = localdirs
-	if cfg.Host == "" {
-		cfg.Host = os.Getenv("BUILDKIT_HOST")
-	}
-	if cfg.Host == "" {
-		cfg.Host = defaultBuildkitHost
-	}
-	c, err := bk.New(ctx, cfg.Host)
-	if err != nil {
-		return nil, errors.Wrap(err, "buildkit client")
-	}
-	return &Client{
-		c:         c,
-		cfg:       cfg,
-		localdirs: localdirs,
-	}, nil
-}
 
-func (c *Client) Compute(ctx context.Context) (*Value, error) {
+	// FIXME: merge this into env output.
-	lg := log.Ctx(ctx)
+	out, err := env.Compiler().EmptyStruct()
-
-	cc := &Compiler{}
-	out, err := cc.EmptyStruct()
 	if err != nil {
 		return nil, err
 	}
+
 	// Spawn Build() goroutine
 	eg, ctx := errgroup.WithContext(ctx)
 	events := make(chan *bk.SolveStatus)
@@ -118,7 +92,7 @@ func (c *Client) Compute(ctx context.Context) (*Value, error) {
 	// Spawn build function
 	eg.Go(func() error {
 		defer outw.Close()
-		return c.buildfn(ctx, events, outw)
+		return c.buildfn(ctx, env, events, outw)
 	})
 
 	// Spawn print function(s)
@@ -154,19 +128,28 @@ func (c *Client) Compute(ctx context.Context) (*Value, error) {
 	// Retrieve output
 	eg.Go(func() error {
 		defer outr.Close()
-		return c.outputfn(ctx, outr, out, cc)
+		return c.outputfn(ctx, outr, out, env.cc)
 	})
 	return out, eg.Wait()
 }
 
-func (c *Client) buildfn(ctx context.Context, ch chan *bk.SolveStatus, w io.WriteCloser) error {
+func (c *Client) buildfn(ctx context.Context, env *Env, ch chan *bk.SolveStatus, w io.WriteCloser) error {
 	lg := log.Ctx(ctx)
 
+	// Serialize input and updater
+	input, err := env.Input().SourceString()
+	if err != nil {
+		return errors.Wrap(err, "serialize env input")
+	}
+	updater, err := env.Updater().Value().SourceString()
+	if err != nil {
+		return errors.Wrap(err, "serialize updater script")
+	}
 	// Setup solve options
 	opts := bk.SolveOpt{
 		FrontendAttrs: map[string]string{
-			bkInputKey:   c.cfg.Input,
+			bkInputKey:   input,
-			bkUpdaterKey: c.cfg.Updater,
+			bkUpdaterKey: updater,
 		},
 		LocalDirs: c.localdirs,
 		// FIXME: catch output & return as cue value
@@ -183,7 +166,6 @@ func (c *Client) buildfn(ctx context.Context, ch chan *bk.SolveStatus, w io.Writ
 	lg.Debug().
 		Interface("localdirs", opts.LocalDirs).
 		Interface("attrs", opts.FrontendAttrs).
-		Interface("host", c.cfg.Host).
 		Msg("spawning buildkit job")
 	resp, err := c.c.Build(ctx, opts, "", Compute, ch)
 	if err != nil {

dagger/compute.go

@@ -27,10 +27,13 @@ func Compute(ctx context.Context, c bkgw.Client) (r *bkgw.Result, err error) {
 	if o, exists := c.BuildOpts().Opts[bkUpdaterKey]; exists {
 		updater = o
 	}
-	env, err := NewEnv(updater)
+	env, err := NewEnv()
 	if err != nil {
 		return nil, err
 	}
+	if err := env.SetUpdater(updater); err != nil {
+		return nil, err
+	}
 	if err := env.Update(ctx, s); err != nil {
 		return nil, err
 	}

dagger/env.go

@@ -35,39 +35,82 @@ type Env struct {
 	cc *Compiler
 }
 
-func NewEnv(updater interface{}) (*Env, error) {
+func (env *Env) Updater() *Script {
-	var (
+	return env.updater
-		env = &Env{}
-		cc  = &Compiler{}
-		err error
-	)
-	// 1. Updater
-	if updater == nil {
-		updater = "[]"
 }
-	env.updater, err = cc.CompileScript("updater", updater)
+
+// Set the updater script for this environment.
+// u may be:
+//  - A compiled script: *Script
+//  - A compiled value: *Value
+//  - A cue source: string, []byte, io.Reader
+func (env *Env) SetUpdater(u interface{}) error {
+	if v, ok := u.(*Value); ok {
+		updater, err := NewScript(v)
 		if err != nil {
-		return nil, err
+			return errors.Wrap(err, "invalid updater script")
 		}
-	// 2. initialize empty values
+		env.updater = updater
+		return nil
+	}
+	if updater, ok := u.(*Script); ok {
+		env.updater = updater
+		return nil
+	}
+	if u == nil {
+		u = "[]"
+	}
+	updater, err := env.cc.CompileScript("updater", u)
+	if err != nil {
+		return err
+	}
+	env.updater = updater
+	return nil
+}
+
+func NewEnv() (*Env, error) {
+	cc := &Compiler{}
 	empty, err := cc.EmptyStruct()
 	if err != nil {
 		return nil, err
 	}
-	env.input = empty
+	env := &Env{
-	env.base = empty
+		cc:     cc,
-	env.state = empty
+		base:   empty,
-	env.output = empty
+		input:  empty,
-	// 3. compiler
+		output: empty,
-	env.cc = cc
+		state:  empty,
+	}
+	if err := env.SetUpdater(nil); err != nil {
+		return nil, err
+	}
 	return env, nil
 }
 
-func (env *Env) SetInput(src interface{}) error {
+func (env *Env) Compiler() *Compiler {
-	if src == nil {
+	return env.cc
-		src = "{}"
 }
-	input, err := env.cc.Compile("input", src)
+
+func (env *Env) State() *Value {
+	return env.state
+}
+
+func (env *Env) Input() *Value {
+	return env.input
+}
+
+func (env *Env) SetInput(i interface{}) error {
+	if input, ok := i.(*Value); ok {
+		return env.set(
+			env.base,
+			input,
+			env.output,
+		)
+	}
+	if i == nil {
+		i = "{}"
+	}
+	input, err := env.cc.Compile("input", i)
 	if err != nil {
 		return err
 	}
@@ -98,6 +141,14 @@ func (env *Env) Update(ctx context.Context, s Solver) error {
 	)
 }
 
+func (env *Env) Base() *Value {
+	return env.base
+}
+
+func (env *Env) Output() *Value {
+	return env.output
+}
+
 // Scan all scripts in the environment for references to local directories (do:"local"),
 // and return all referenced directory names.
 // This is used by clients to grant access to local directories when they are referenced
@@ -105,8 +156,15 @@ func (env *Env) Update(ctx context.Context, s Solver) error {
 func (env *Env) LocalDirs(ctx context.Context) (map[string]string, error) {
 	lg := log.Ctx(ctx)
 	dirs := map[string]string{}
+	lg.Debug().
+		Str("func", "Env.LocalDirs").
+		Str("state", env.state.SourceUnsafe()).
+		Str("updater", env.updater.Value().SourceUnsafe()).
+		Msg("starting")
+	defer func() {
+		lg.Debug().Str("func", "Env.LocalDirs").Interface("result", dirs).Msg("done")
+	}()
 	// 1. Walk env state, scan compute script for each component.
-	lg.Debug().Msg("walking env client-side for local dirs")
 	_, err := env.Walk(ctx, func(ctx context.Context, c *Component, out *Fillable) error {
 		lg.Debug().
 			Str("func", "Env.LocalDirs").
@@ -163,22 +221,24 @@ func (env *Env) Compute(ctx context.Context, s Solver) error {
 }
 
 // FIXME: this is just a 3-way merge. Add var args to Value.Merge.
-func (env *Env) set(base, input, output *Value) error {
+func (env *Env) set(base, input, output *Value) (err error) {
 	// FIXME: make this cleaner in *Value by keeping intermediary instances
 	// FIXME: state.CueInst() must return an instance with the same
 	//  contents as state.v, for the purposes of cueflow.
 	//  That is not currently how *Value works, so we prepare the cue
 	//  instance manually.
 	//   --> refactor the Value API to do this for us.
-	baseInst := base.CueInst()
+	stateInst := env.state.CueInst()
-	inputInst := input.CueInst()
-	outputInst := output.CueInst()
 
-	stateInst, err := baseInst.Fill(inputInst.Value())
+	stateInst, err = stateInst.Fill(base.val)
 	if err != nil {
 		return errors.Wrap(err, "merge base & input")
 	}
-	stateInst, err = stateInst.Fill(outputInst.Value())
+	stateInst, err = stateInst.Fill(input.val)
+	if err != nil {
+		return errors.Wrap(err, "merge base & input")
+	}
+	stateInst, err = stateInst.Fill(output.val)
 	if err != nil {
 		return errors.Wrap(err, "merge output with base & input")
 	}

dagger/env_test.go

@@ -0,0 +1,71 @@
+package dagger
+
+import (
+	"context"
+	"testing"
+)
+
+func TestSimpleEnvSet(t *testing.T) {
+	env, err := NewEnv()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := env.SetInput(`hello: "world"`); err != nil {
+		t.Fatal(err)
+	}
+	hello, err := env.State().Get("hello").String()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if hello != "world" {
+		t.Fatal(hello)
+	}
+}
+
+func TestSimpleEnvSetFromInputValue(t *testing.T) {
+	env, err := NewEnv()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	v, err := env.Compiler().Compile("", `hello: "world"`)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := env.SetInput(v); err != nil {
+		t.Fatal(err)
+	}
+	hello, err := env.State().Get("hello").String()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if hello != "world" {
+		t.Fatal(hello)
+	}
+}
+
+func TestEnvInputComponent(t *testing.T) {
+	env, err := NewEnv()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	v, err := env.Compiler().Compile("", `foo: #dagger: compute: [{do:"local",dir:"."}]`)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := env.SetInput(v); err != nil {
+		t.Fatal(err)
+	}
+
+	localdirs, err := env.LocalDirs(context.TODO())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(localdirs) != 1 {
+		t.Fatal(localdirs)
+	}
+	if dir, ok := localdirs["."]; !ok || dir != "." {
+		t.Fatal(localdirs)
+	}
+}

dagger/input.go

@@ -0,0 +1,239 @@
+package dagger
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/url"
+	"strings"
+
+	"cuelang.org/go/cue"
+	"github.com/spf13/pflag"
+)
+
+// A mutable cue value with an API suitable for user inputs,
+// such as command-line flag parsing.
+type InputValue struct {
+	root *Value
+	cc   *Compiler
+}
+
+func (iv *InputValue) Value() *Value {
+	return iv.root
+}
+
+func (iv *InputValue) String() string {
+	s, _ := iv.root.SourceString()
+	return s
+}
+
+func NewInputValue(cc *Compiler, base interface{}) (*InputValue, error) {
+	root, err := cc.Compile("base", base)
+	if err != nil {
+		return nil, err
+	}
+	return &InputValue{
+		cc:   cc,
+		root: root,
+	}, nil
+}
+
+func (iv *InputValue) Set(s string, enc func(string, *Compiler) (interface{}, error)) error {
+	// Split from eg. 'foo.bar={bla:"bla"}`
+	k, vRaw := splitkv(s)
+	v, err := enc(vRaw, iv.cc)
+	if err != nil {
+		return err
+	}
+	root, err := iv.root.MergePath(v, k)
+	if err != nil {
+		return err
+	}
+	iv.root = root
+	return nil
+}
+
+// Adapter to receive string values from pflag
+func (iv *InputValue) StringFlag() pflag.Value {
+	return stringFlag{
+		iv: iv,
+	}
+}
+
+type stringFlag struct {
+	iv *InputValue
+}
+
+func (sf stringFlag) Set(s string) error {
+	return sf.iv.Set(s, func(s string, _ *Compiler) (interface{}, error) {
+		return s, nil
+	})
+}
+
+func (sf stringFlag) String() string {
+	return sf.iv.String()
+}
+
+func (sf stringFlag) Type() string {
+	return "STRING"
+}
+
+// DIR FLAG
+// Receive a local directory path and translate it into a component
+func (iv *InputValue) DirFlag(include ...string) pflag.Value {
+	if include == nil {
+		include = []string{}
+	}
+	return dirFlag{
+		iv:      iv,
+		include: include,
+	}
+}
+
+type dirFlag struct {
+	iv      *InputValue
+	include []string
+}
+
+func (f dirFlag) Set(s string) error {
+	return f.iv.Set(s, func(s string, cc *Compiler) (interface{}, error) {
+		// FIXME: this is a hack because cue API can't merge into a list
+		include, err := json.Marshal(f.include)
+		if err != nil {
+			return nil, err
+		}
+		return cc.Compile("", fmt.Sprintf(
+			`#dagger: compute: [{do:"local",dir:"%s", include:%s}]`,
+			s,
+			include,
+		))
+	})
+}
+
+func (f dirFlag) String() string {
+	return f.iv.String()
+}
+
+func (f dirFlag) Type() string {
+	return "PATH"
+}
+
+// GIT FLAG
+// Receive a git repository reference and translate it into a component
+func (iv *InputValue) GitFlag() pflag.Value {
+	return gitFlag{
+		iv: iv,
+	}
+}
+
+type gitFlag struct {
+	iv *InputValue
+}
+
+func (f gitFlag) Set(s string) error {
+	return f.iv.Set(s, func(s string, cc *Compiler) (interface{}, error) {
+		u, err := url.Parse(s)
+		if err != nil {
+			return nil, fmt.Errorf("invalid git url")
+		}
+		ref := u.Fragment // eg. #main
+		u.Fragment = ""
+		remote := u.String()
+
+		return cc.Compile("", fmt.Sprintf(
+			`#dagger: compute: [{do:"fetch-git", remote:"%s", ref:"%s"}]`,
+			remote,
+			ref,
+		))
+	})
+}
+
+func (f gitFlag) String() string {
+	return f.iv.String()
+}
+
+func (f gitFlag) Type() string {
+	return "REMOTE,REF"
+}
+
+// SOURCE FLAG
+// Adapter to receive a simple source description and translate it to a loader script.
+// For example 'git+https://github.com/cuelang/cue#master` -> [{do:"git",remote:"https://github.com/cuelang/cue",ref:"master"}]
+
+func (iv *InputValue) SourceFlag() pflag.Value {
+	return sourceFlag{
+		iv: iv,
+	}
+}
+
+type sourceFlag struct {
+	iv *InputValue
+}
+
+func (f sourceFlag) Set(s string) error {
+	return f.iv.Set(s, func(s string, cc *Compiler) (interface{}, error) {
+		u, err := url.Parse(s)
+		if err != nil {
+			return nil, err
+		}
+		switch u.Scheme {
+		case "", "file":
+			return cc.Compile(
+				"source",
+				// FIXME: include only cue files as a shortcut. Make this configurable somehow.
+				fmt.Sprintf(`[{do:"local",dir:"%s",include:["*.cue","cue.mod"]}]`, u.Host+u.Path),
+			)
+		default:
+			return nil, fmt.Errorf("unsupported source scheme: %q", u.Scheme)
+		}
+	})
+}
+
+func (f sourceFlag) String() string {
+	return f.iv.String()
+}
+
+func (f sourceFlag) Type() string {
+	return "PATH | file://PATH | git+ssh://HOST/PATH | git+https://HOST/PATH"
+}
+
+// RAW CUE FLAG
+// Adapter to receive raw cue values from pflag
+func (iv *InputValue) CueFlag() pflag.Value {
+	return cueFlag{
+		iv: iv,
+	}
+}
+
+type cueFlag struct {
+	iv *InputValue
+}
+
+func (f cueFlag) Set(s string) error {
+	return f.iv.Set(s, func(s string, cc *Compiler) (interface{}, error) {
+		return cc.Compile("cue input", s)
+	})
+}
+
+func (f cueFlag) String() string {
+	return f.iv.String()
+}
+
+func (f cueFlag) Type() string {
+	return "CUE"
+}
+
+// UTILITIES
+
+func splitkv(kv string) (cue.Path, string) {
+	parts := strings.SplitN(kv, "=", 2)
+	if len(parts) == 2 {
+		if parts[0] == "." || parts[0] == "" {
+			return cue.MakePath(), parts[1]
+		}
+		return cue.ParsePath(parts[0]), parts[1]
+	}
+	if len(parts) == 1 {
+		return cue.MakePath(), parts[0]
+	}
+	return cue.MakePath(), ""
+}

dagger/input_test.go

@@ -0,0 +1,35 @@
+package dagger
+
+import (
+	"context"
+	"testing"
+)
+
+func TestEnvInputFlag(t *testing.T) {
+	env, err := NewEnv()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	input, err := NewInputValue(env.Compiler(), `{}`)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := input.DirFlag().Set("www.source=."); err != nil {
+		t.Fatal(err)
+	}
+	if err := env.SetInput(input.Value()); err != nil {
+		t.Fatal(err)
+	}
+
+	localdirs, err := env.LocalDirs(context.TODO())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(localdirs) != 1 {
+		t.Fatal(localdirs)
+	}
+	if dir, ok := localdirs["."]; !ok || dir != "." {
+		t.Fatal(localdirs)
+	}
+}

dagger/script.go

@@ -101,6 +101,11 @@ func (s *Script) Walk(ctx context.Context, fn func(op *Op) error) error {
 }
 
 func (s *Script) LocalDirs(ctx context.Context) (map[string]string, error) {
+	lg := log.Ctx(ctx)
+	lg.Debug().
+		Str("func", "Script.LocalDirs").
+		Str("location", s.Value().Path().String()).
+		Msg("starting")
 	dirs := map[string]string{}
 	err := s.Walk(ctx, func(op *Op) error {
 		if err := op.Validate("#Local"); err != nil {
@@ -114,5 +119,11 @@ func (s *Script) LocalDirs(ctx context.Context) (map[string]string, error) {
 		dirs[dir] = dir
 		return nil
 	})
+	lg.Debug().
+		Str("func", "Script.LocalDirs").
+		Str("location", s.Value().Path().String()).
+		Interface("err", err).
+		Interface("result", dirs).
+		Msg("done")
 	return dirs, err
 }

dagger/value.go

@@ -32,8 +32,7 @@ func wrapValue(v cue.Value, inst *cue.Instance, cc *Compiler) *Value {
 	}
 }
 
-// Fill is a concurrency safe wrapper around cue.Value.Fill()
+// Fill the value in-place, unlike Merge which returns a copy.
-// This is the only method which changes the value in-place.
 func (v *Value) Fill(x interface{}) error {
 	v.cc.Lock()
 	defer v.cc.Unlock()
@@ -96,6 +95,11 @@ func (v *Value) String() (string, error) {
 	return v.val.String()
 }
 
+func (v *Value) SourceUnsafe() string {
+	s, _ := v.SourceString()
+	return s
+}
+
 // Proxy function to the underlying cue.Value
 func (v *Value) Path() cue.Path {
 	return v.val.Path()

examples/tests/test.sh

@@ -94,7 +94,7 @@ test::exec(){
   test::one "Exec: env valid" --exit=0 --stdout={} \
       "$dagger" "${DAGGER_BINARY_ARGS[@]}" compute  "$d"/exec/env/valid
   test::one "Exec: env with overlay" --exit=0 \
-      "$dagger" "${DAGGER_BINARY_ARGS[@]}" compute --input 'bar: "overlay environment"' "$d"/exec/env/overlay
+      "$dagger" "${DAGGER_BINARY_ARGS[@]}" compute --input-cue 'bar: "overlay environment"' "$d"/exec/env/overlay
 
   test::one "Exec: non existent dir" --exit=0 --stdout={} \
       "$dagger" "${DAGGER_BINARY_ARGS[@]}" compute  "$d"/exec/dir/doesnotexist
@@ -191,13 +191,13 @@ test::input() {
       "$dagger" "${DAGGER_BINARY_ARGS[@]}" compute "$d"/input/simple
 
   test::one "Input: simple input" --exit=0 --stdout='{"in":"foobar","test":"received: foobar"}' \
-      "$dagger" "${DAGGER_BINARY_ARGS[@]}" compute --input 'in: "foobar"' "$d"/input/simple
+      "$dagger" "${DAGGER_BINARY_ARGS[@]}" compute --input-cue 'in: "foobar"' "$d"/input/simple
 
   test::one "Input: default values" --exit=0 --stdout='{"in":"default input","test":"received: default input"}' \
       "$dagger" "${DAGGER_BINARY_ARGS[@]}" compute "$d"/input/default
 
   test::one "Input: override default value" --exit=0 --stdout='{"in":"foobar","test":"received: foobar"}' \
-      "$dagger" "${DAGGER_BINARY_ARGS[@]}" compute --input 'in: "foobar"' "$d"/input/default
+      "$dagger" "${DAGGER_BINARY_ARGS[@]}" compute --input-cue 'in: "foobar"' "$d"/input/default
 }
 
 

go.mod

@@ -11,6 +11,7 @@ require (
 	github.com/pkg/errors v0.9.1
 	github.com/rs/zerolog v1.20.0
 	github.com/spf13/cobra v1.0.0
+	github.com/spf13/pflag v1.0.5
 	github.com/spf13/viper v1.7.0
 	github.com/tonistiigi/fsutil v0.0.0-20201103201449-0834f99b7b85
 	golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9