set build-args from docker proxy configuration

For backward compatibility with docker build.

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

build/build.go

@@ -87,11 +87,12 @@ type Inputs struct {
 }
 
 type DriverInfo struct {
-	Driver   driver.Driver
-	Name     string
-	Platform []specs.Platform
-	Err      error
-	ImageOpt imagetools.Opt
+	Driver      driver.Driver
+	Name        string
+	Platform    []specs.Platform
+	Err         error
+	ImageOpt    imagetools.Opt
+	ProxyConfig map[string]string
 }
 
 type DockerAPI interface {
@@ -338,7 +339,8 @@ func toRepoOnly(in string) (string, error) {
 	return strings.Join(out, ","), nil
 }
 
-func toSolveOpt(ctx context.Context, d driver.Driver, multiDriver bool, opt Options, bopts gateway.BuildOpts, configDir string, pw progress.Writer, dl dockerLoadCallback) (solveOpt *client.SolveOpt, release func(), err error) {
+func toSolveOpt(ctx context.Context, di DriverInfo, multiDriver bool, opt Options, bopts gateway.BuildOpts, configDir string, pw progress.Writer, dl dockerLoadCallback) (solveOpt *client.SolveOpt, release func(), err error) {
+	d := di.Driver
 	defers := make([]func(), 0, 2)
 	releaseF := func() {
 		for _, f := range defers {
@@ -541,6 +543,12 @@ func toSolveOpt(ctx context.Context, d driver.Driver, multiDriver bool, opt Opti
 		so.FrontendAttrs["label:"+k] = v
 	}
 
+	for k, v := range di.ProxyConfig {
+		if _, ok := opt.BuildArgs[k]; !ok {
+			so.FrontendAttrs["build-arg:"+k] = v
+		}
+	}
+
 	// set platforms
 	if len(opt.Platforms) != 0 {
 		pp := make([]string, len(opt.Platforms))
@@ -635,12 +643,12 @@ func Build(ctx context.Context, drivers []DriverInfo, opt map[string]Options, do
 		multiDriver := len(m[k]) > 1
 		hasMobyDriver := false
 		for i, dp := range m[k] {
-			d := drivers[dp.driverIndex].Driver
-			if d.IsMobyDriver() {
+			di := drivers[dp.driverIndex]
+			if di.Driver.IsMobyDriver() {
 				hasMobyDriver = true
 			}
 			opt.Platforms = dp.platforms
-			so, release, err := toSolveOpt(ctx, d, multiDriver, opt, dp.bopts, configDir, w, func(name string) (io.WriteCloser, func(), error) {
+			so, release, err := toSolveOpt(ctx, di, multiDriver, opt, dp.bopts, configDir, w, func(name string) (io.WriteCloser, func(), error) {
 				return newDockerLoader(ctx, docker, name, w)
 			})
 			if err != nil {

commands/util.go

@@ -73,8 +73,9 @@ func driversForNodeGroup(ctx context.Context, dockerCli command.Cli, ng *store.N
 		func(i int, n store.Node) {
 			eg.Go(func() error {
 				di := build.DriverInfo{
-					Name:     n.Name,
-					Platform: n.Platforms,
+					Name:        n.Name,
+					Platform:    n.Platforms,
+					ProxyConfig: storeutil.GetProxyConfig(dockerCli),
 				}
 				defer func() {
 					dis[i] = di
@@ -264,9 +265,10 @@ func getDefaultDrivers(ctx context.Context, dockerCli command.Cli, defaultOnly b
 	}
 	return []build.DriverInfo{
 		{
-			Name:     "default",
-			Driver:   d,
-			ImageOpt: imageopt,
+			Name:        "default",
+			Driver:      d,
+			ImageOpt:    imageopt,
+			ProxyConfig: storeutil.GetProxyConfig(dockerCli),
 		},
 	}, nil
 }

store/storeutil/storeutil.go

@@ -37,6 +37,32 @@ func GetCurrentEndpoint(dockerCli command.Cli) (string, error) {
 	return de, nil
 }
 
+func GetProxyConfig(dockerCli command.Cli) map[string]string {
+	cfg := dockerCli.ConfigFile()
+	host := dockerCli.Client().DaemonHost()
+
+	proxy, ok := cfg.Proxies[host]
+	if !ok {
+		proxy = cfg.Proxies["default"]
+	}
+
+	m := map[string]string{}
+
+	if v := proxy.HTTPProxy; v != "" {
+		m["HTTP_PROXY"] = v
+	}
+	if v := proxy.HTTPSProxy; v != "" {
+		m["HTTPS_PROXY"] = v
+	}
+	if v := proxy.NoProxy; v != "" {
+		m["NO_PROXY"] = v
+	}
+	if v := proxy.FTPProxy; v != "" {
+		m["FTP_PROXY"] = v
+	}
+	return m
+}
+
 // GetDockerEndpoint returns docker endpoint string for given context
 func GetDockerEndpoint(dockerCli command.Cli, name string) (string, error) {
 	list, err := dockerCli.ContextStore().List()