779 lines
21 KiB
Go
779 lines
21 KiB
Go
package dockerfile
|
|
|
|
// This file contains the dispatchers for each command. Note that
|
|
// `nullDispatch` is not actually a command, but support for commands we parse
|
|
// but do nothing with.
|
|
//
|
|
// See evaluator.go for a higher level discussion of the whole evaluator
|
|
// package.
|
|
|
|
import (
|
|
"fmt"
|
|
"regexp"
|
|
"runtime"
|
|
"sort"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/Sirupsen/logrus"
|
|
"github.com/docker/docker/api"
|
|
"github.com/docker/docker/api/types/container"
|
|
"github.com/docker/docker/api/types/strslice"
|
|
"github.com/docker/docker/builder"
|
|
"github.com/docker/docker/pkg/signal"
|
|
runconfigopts "github.com/docker/docker/runconfig/opts"
|
|
"github.com/docker/go-connections/nat"
|
|
)
|
|
|
|
// ENV foo bar
|
|
//
|
|
// Sets the environment variable foo to bar, also makes interpolation
|
|
// in the dockerfile available from the next statement on via ${foo}.
|
|
//
|
|
func env(b *Builder, args []string, attributes map[string]bool, original string) error {
|
|
if len(args) == 0 {
|
|
return errAtLeastOneArgument("ENV")
|
|
}
|
|
|
|
if len(args)%2 != 0 {
|
|
// should never get here, but just in case
|
|
return errTooManyArguments("ENV")
|
|
}
|
|
|
|
if err := b.flags.Parse(); err != nil {
|
|
return err
|
|
}
|
|
|
|
// TODO/FIXME/NOT USED
|
|
// Just here to show how to use the builder flags stuff within the
|
|
// context of a builder command. Will remove once we actually add
|
|
// a builder command to something!
|
|
/*
|
|
flBool1 := b.flags.AddBool("bool1", false)
|
|
flStr1 := b.flags.AddString("str1", "HI")
|
|
|
|
if err := b.flags.Parse(); err != nil {
|
|
return err
|
|
}
|
|
|
|
fmt.Printf("Bool1:%v\n", flBool1)
|
|
fmt.Printf("Str1:%v\n", flStr1)
|
|
*/
|
|
|
|
commitStr := "ENV"
|
|
|
|
for j := 0; j < len(args); j++ {
|
|
// name ==> args[j]
|
|
// value ==> args[j+1]
|
|
|
|
if len(args[j]) == 0 {
|
|
return errBlankCommandNames("ENV")
|
|
}
|
|
|
|
newVar := args[j] + "=" + args[j+1] + ""
|
|
commitStr += " " + newVar
|
|
|
|
gotOne := false
|
|
for i, envVar := range b.runConfig.Env {
|
|
envParts := strings.SplitN(envVar, "=", 2)
|
|
if envParts[0] == args[j] {
|
|
b.runConfig.Env[i] = newVar
|
|
gotOne = true
|
|
break
|
|
}
|
|
}
|
|
if !gotOne {
|
|
b.runConfig.Env = append(b.runConfig.Env, newVar)
|
|
}
|
|
j++
|
|
}
|
|
|
|
return b.commit("", b.runConfig.Cmd, commitStr)
|
|
}
|
|
|
|
// MAINTAINER some text <maybe@an.email.address>
|
|
//
|
|
// Sets the maintainer metadata.
|
|
func maintainer(b *Builder, args []string, attributes map[string]bool, original string) error {
|
|
if len(args) != 1 {
|
|
return errExactlyOneArgument("MAINTAINER")
|
|
}
|
|
|
|
if err := b.flags.Parse(); err != nil {
|
|
return err
|
|
}
|
|
|
|
b.maintainer = args[0]
|
|
return b.commit("", b.runConfig.Cmd, fmt.Sprintf("MAINTAINER %s", b.maintainer))
|
|
}
|
|
|
|
// LABEL some json data describing the image
|
|
//
|
|
// Sets the Label variable foo to bar,
|
|
//
|
|
func label(b *Builder, args []string, attributes map[string]bool, original string) error {
|
|
if len(args) == 0 {
|
|
return errAtLeastOneArgument("LABEL")
|
|
}
|
|
if len(args)%2 != 0 {
|
|
// should never get here, but just in case
|
|
return errTooManyArguments("LABEL")
|
|
}
|
|
|
|
if err := b.flags.Parse(); err != nil {
|
|
return err
|
|
}
|
|
|
|
commitStr := "LABEL"
|
|
|
|
if b.runConfig.Labels == nil {
|
|
b.runConfig.Labels = map[string]string{}
|
|
}
|
|
|
|
for j := 0; j < len(args); j++ {
|
|
// name ==> args[j]
|
|
// value ==> args[j+1]
|
|
|
|
if len(args[j]) == 0 {
|
|
return errBlankCommandNames("LABEL")
|
|
}
|
|
|
|
newVar := args[j] + "=" + args[j+1] + ""
|
|
commitStr += " " + newVar
|
|
|
|
b.runConfig.Labels[args[j]] = args[j+1]
|
|
j++
|
|
}
|
|
return b.commit("", b.runConfig.Cmd, commitStr)
|
|
}
|
|
|
|
// ADD foo /path
|
|
//
|
|
// Add the file 'foo' to '/path'. Tarball and Remote URL (git, http) handling
|
|
// exist here. If you do not wish to have this automatic handling, use COPY.
|
|
//
|
|
func add(b *Builder, args []string, attributes map[string]bool, original string) error {
|
|
if len(args) < 2 {
|
|
return errAtLeastTwoArguments("ADD")
|
|
}
|
|
|
|
if err := b.flags.Parse(); err != nil {
|
|
return err
|
|
}
|
|
|
|
return b.runContextCommand(args, true, true, "ADD")
|
|
}
|
|
|
|
// COPY foo /path
|
|
//
|
|
// Same as 'ADD' but without the tar and remote url handling.
|
|
//
|
|
func dispatchCopy(b *Builder, args []string, attributes map[string]bool, original string) error {
|
|
if len(args) < 2 {
|
|
return errAtLeastTwoArguments("COPY")
|
|
}
|
|
|
|
if err := b.flags.Parse(); err != nil {
|
|
return err
|
|
}
|
|
|
|
return b.runContextCommand(args, false, false, "COPY")
|
|
}
|
|
|
|
// FROM imagename
|
|
//
|
|
// This sets the image the dockerfile will build on top of.
|
|
//
|
|
func from(b *Builder, args []string, attributes map[string]bool, original string) error {
|
|
if len(args) != 1 {
|
|
return errExactlyOneArgument("FROM")
|
|
}
|
|
|
|
if err := b.flags.Parse(); err != nil {
|
|
return err
|
|
}
|
|
|
|
name := args[0]
|
|
|
|
var (
|
|
image builder.Image
|
|
err error
|
|
)
|
|
|
|
// Windows cannot support a container with no base image.
|
|
if name == api.NoBaseImageSpecifier {
|
|
if runtime.GOOS == "windows" {
|
|
return fmt.Errorf("Windows does not support FROM scratch")
|
|
}
|
|
b.image = ""
|
|
b.noBaseImage = true
|
|
} else {
|
|
// TODO: don't use `name`, instead resolve it to a digest
|
|
if !b.options.PullParent {
|
|
image, err = b.docker.GetImageOnBuild(name)
|
|
// TODO: shouldn't we error out if error is different from "not found" ?
|
|
}
|
|
if image == nil {
|
|
image, err = b.docker.PullOnBuild(b.clientCtx, name, b.options.AuthConfigs, b.Output)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
|
|
return b.processImageFrom(image)
|
|
}
|
|
|
|
// ONBUILD RUN echo yo
|
|
//
|
|
// ONBUILD triggers run when the image is used in a FROM statement.
|
|
//
|
|
// ONBUILD handling has a lot of special-case functionality, the heading in
|
|
// evaluator.go and comments around dispatch() in the same file explain the
|
|
// special cases. search for 'OnBuild' in internals.go for additional special
|
|
// cases.
|
|
//
|
|
func onbuild(b *Builder, args []string, attributes map[string]bool, original string) error {
|
|
if len(args) == 0 {
|
|
return errAtLeastOneArgument("ONBUILD")
|
|
}
|
|
|
|
if err := b.flags.Parse(); err != nil {
|
|
return err
|
|
}
|
|
|
|
triggerInstruction := strings.ToUpper(strings.TrimSpace(args[0]))
|
|
switch triggerInstruction {
|
|
case "ONBUILD":
|
|
return fmt.Errorf("Chaining ONBUILD via `ONBUILD ONBUILD` isn't allowed")
|
|
case "MAINTAINER", "FROM":
|
|
return fmt.Errorf("%s isn't allowed as an ONBUILD trigger", triggerInstruction)
|
|
}
|
|
|
|
original = regexp.MustCompile(`(?i)^\s*ONBUILD\s*`).ReplaceAllString(original, "")
|
|
|
|
b.runConfig.OnBuild = append(b.runConfig.OnBuild, original)
|
|
return b.commit("", b.runConfig.Cmd, fmt.Sprintf("ONBUILD %s", original))
|
|
}
|
|
|
|
// WORKDIR /tmp
|
|
//
|
|
// Set the working directory for future RUN/CMD/etc statements.
|
|
//
|
|
func workdir(b *Builder, args []string, attributes map[string]bool, original string) error {
|
|
if len(args) != 1 {
|
|
return errExactlyOneArgument("WORKDIR")
|
|
}
|
|
|
|
err := b.flags.Parse()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// This is from the Dockerfile and will not necessarily be in platform
|
|
// specific semantics, hence ensure it is converted.
|
|
b.runConfig.WorkingDir, err = normaliseWorkdir(b.runConfig.WorkingDir, args[0])
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return b.commit("", b.runConfig.Cmd, fmt.Sprintf("WORKDIR %v", b.runConfig.WorkingDir))
|
|
}
|
|
|
|
// RUN some command yo
|
|
//
|
|
// run a command and commit the image. Args are automatically prepended with
|
|
// the current SHELL which defaults to 'sh -c' under linux or 'cmd /S /C' under
|
|
// Windows, in the event there is only one argument The difference in processing:
|
|
//
|
|
// RUN echo hi # sh -c echo hi (Linux)
|
|
// RUN echo hi # cmd /S /C echo hi (Windows)
|
|
// RUN [ "echo", "hi" ] # echo hi
|
|
//
|
|
func run(b *Builder, args []string, attributes map[string]bool, original string) error {
|
|
if b.image == "" && !b.noBaseImage {
|
|
return fmt.Errorf("Please provide a source image with `from` prior to run")
|
|
}
|
|
|
|
if err := b.flags.Parse(); err != nil {
|
|
return err
|
|
}
|
|
|
|
args = handleJSONArgs(args, attributes)
|
|
|
|
if !attributes["json"] {
|
|
args = append(getShell(b.runConfig), args...)
|
|
}
|
|
config := &container.Config{
|
|
Cmd: strslice.StrSlice(args),
|
|
Image: b.image,
|
|
}
|
|
|
|
// stash the cmd
|
|
cmd := b.runConfig.Cmd
|
|
if len(b.runConfig.Entrypoint) == 0 && len(b.runConfig.Cmd) == 0 {
|
|
b.runConfig.Cmd = config.Cmd
|
|
}
|
|
|
|
// stash the config environment
|
|
env := b.runConfig.Env
|
|
|
|
defer func(cmd strslice.StrSlice) { b.runConfig.Cmd = cmd }(cmd)
|
|
defer func(env []string) { b.runConfig.Env = env }(env)
|
|
|
|
// derive the net build-time environment for this run. We let config
|
|
// environment override the build time environment.
|
|
// This means that we take the b.buildArgs list of env vars and remove
|
|
// any of those variables that are defined as part of the container. In other
|
|
// words, anything in b.Config.Env. What's left is the list of build-time env
|
|
// vars that we need to add to each RUN command - note the list could be empty.
|
|
//
|
|
// We don't persist the build time environment with container's config
|
|
// environment, but just sort and prepend it to the command string at time
|
|
// of commit.
|
|
// This helps with tracing back the image's actual environment at the time
|
|
// of RUN, without leaking it to the final image. It also aids cache
|
|
// lookup for same image built with same build time environment.
|
|
cmdBuildEnv := []string{}
|
|
configEnv := runconfigopts.ConvertKVStringsToMap(b.runConfig.Env)
|
|
for key, val := range b.options.BuildArgs {
|
|
if !b.isBuildArgAllowed(key) {
|
|
// skip build-args that are not in allowed list, meaning they have
|
|
// not been defined by an "ARG" Dockerfile command yet.
|
|
// This is an error condition but only if there is no "ARG" in the entire
|
|
// Dockerfile, so we'll generate any necessary errors after we parsed
|
|
// the entire file (see 'leftoverArgs' processing in evaluator.go )
|
|
continue
|
|
}
|
|
if _, ok := configEnv[key]; !ok {
|
|
cmdBuildEnv = append(cmdBuildEnv, fmt.Sprintf("%s=%s", key, val))
|
|
}
|
|
}
|
|
|
|
// derive the command to use for probeCache() and to commit in this container.
|
|
// Note that we only do this if there are any build-time env vars. Also, we
|
|
// use the special argument "|#" at the start of the args array. This will
|
|
// avoid conflicts with any RUN command since commands can not
|
|
// start with | (vertical bar). The "#" (number of build envs) is there to
|
|
// help ensure proper cache matches. We don't want a RUN command
|
|
// that starts with "foo=abc" to be considered part of a build-time env var.
|
|
saveCmd := config.Cmd
|
|
if len(cmdBuildEnv) > 0 {
|
|
sort.Strings(cmdBuildEnv)
|
|
tmpEnv := append([]string{fmt.Sprintf("|%d", len(cmdBuildEnv))}, cmdBuildEnv...)
|
|
saveCmd = strslice.StrSlice(append(tmpEnv, saveCmd...))
|
|
}
|
|
|
|
b.runConfig.Cmd = saveCmd
|
|
hit, err := b.probeCache()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if hit {
|
|
return nil
|
|
}
|
|
|
|
// set Cmd manually, this is special case only for Dockerfiles
|
|
b.runConfig.Cmd = config.Cmd
|
|
// set build-time environment for 'run'.
|
|
b.runConfig.Env = append(b.runConfig.Env, cmdBuildEnv...)
|
|
// set config as already being escaped, this prevents double escaping on windows
|
|
b.runConfig.ArgsEscaped = true
|
|
|
|
logrus.Debugf("[BUILDER] Command to be executed: %v", b.runConfig.Cmd)
|
|
|
|
cID, err := b.create()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := b.run(cID); err != nil {
|
|
return err
|
|
}
|
|
|
|
// revert to original config environment and set the command string to
|
|
// have the build-time env vars in it (if any) so that future cache look-ups
|
|
// properly match it.
|
|
b.runConfig.Env = env
|
|
b.runConfig.Cmd = saveCmd
|
|
return b.commit(cID, cmd, "run")
|
|
}
|
|
|
|
// CMD foo
|
|
//
|
|
// Set the default command to run in the container (which may be empty).
|
|
// Argument handling is the same as RUN.
|
|
//
|
|
func cmd(b *Builder, args []string, attributes map[string]bool, original string) error {
|
|
if err := b.flags.Parse(); err != nil {
|
|
return err
|
|
}
|
|
|
|
cmdSlice := handleJSONArgs(args, attributes)
|
|
|
|
if !attributes["json"] {
|
|
cmdSlice = append(getShell(b.runConfig), cmdSlice...)
|
|
}
|
|
|
|
b.runConfig.Cmd = strslice.StrSlice(cmdSlice)
|
|
// set config as already being escaped, this prevents double escaping on windows
|
|
b.runConfig.ArgsEscaped = true
|
|
|
|
if err := b.commit("", b.runConfig.Cmd, fmt.Sprintf("CMD %q", cmdSlice)); err != nil {
|
|
return err
|
|
}
|
|
|
|
if len(args) != 0 {
|
|
b.cmdSet = true
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// parseOptInterval(flag) is the duration of flag.Value, or 0 if
|
|
// empty. An error is reported if the value is given and is not positive.
|
|
func parseOptInterval(f *Flag) (time.Duration, error) {
|
|
s := f.Value
|
|
if s == "" {
|
|
return 0, nil
|
|
}
|
|
d, err := time.ParseDuration(s)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
if d <= 0 {
|
|
return 0, fmt.Errorf("Interval %#v must be positive", f.name)
|
|
}
|
|
return d, nil
|
|
}
|
|
|
|
// HEALTHCHECK foo
|
|
//
|
|
// Set the default healthcheck command to run in the container (which may be empty).
|
|
// Argument handling is the same as RUN.
|
|
//
|
|
func healthcheck(b *Builder, args []string, attributes map[string]bool, original string) error {
|
|
if len(args) == 0 {
|
|
return errAtLeastOneArgument("HEALTHCHECK")
|
|
}
|
|
typ := strings.ToUpper(args[0])
|
|
args = args[1:]
|
|
if typ == "NONE" {
|
|
if len(args) != 0 {
|
|
return fmt.Errorf("HEALTHCHECK NONE takes no arguments")
|
|
}
|
|
test := strslice.StrSlice{typ}
|
|
b.runConfig.Healthcheck = &container.HealthConfig{
|
|
Test: test,
|
|
}
|
|
} else {
|
|
if b.runConfig.Healthcheck != nil {
|
|
oldCmd := b.runConfig.Healthcheck.Test
|
|
if len(oldCmd) > 0 && oldCmd[0] != "NONE" {
|
|
fmt.Fprintf(b.Stdout, "Note: overriding previous HEALTHCHECK: %v\n", oldCmd)
|
|
}
|
|
}
|
|
|
|
healthcheck := container.HealthConfig{}
|
|
|
|
flInterval := b.flags.AddString("interval", "")
|
|
flTimeout := b.flags.AddString("timeout", "")
|
|
flRetries := b.flags.AddString("retries", "")
|
|
|
|
if err := b.flags.Parse(); err != nil {
|
|
return err
|
|
}
|
|
|
|
switch typ {
|
|
case "CMD":
|
|
cmdSlice := handleJSONArgs(args, attributes)
|
|
if len(cmdSlice) == 0 {
|
|
return fmt.Errorf("Missing command after HEALTHCHECK CMD")
|
|
}
|
|
|
|
if !attributes["json"] {
|
|
typ = "CMD-SHELL"
|
|
}
|
|
|
|
healthcheck.Test = strslice.StrSlice(append([]string{typ}, cmdSlice...))
|
|
default:
|
|
return fmt.Errorf("Unknown type %#v in HEALTHCHECK (try CMD)", typ)
|
|
}
|
|
|
|
interval, err := parseOptInterval(flInterval)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
healthcheck.Interval = interval
|
|
|
|
timeout, err := parseOptInterval(flTimeout)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
healthcheck.Timeout = timeout
|
|
|
|
if flRetries.Value != "" {
|
|
retries, err := strconv.ParseInt(flRetries.Value, 10, 32)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if retries < 1 {
|
|
return fmt.Errorf("--retries must be at least 1 (not %d)", retries)
|
|
}
|
|
healthcheck.Retries = int(retries)
|
|
} else {
|
|
healthcheck.Retries = 0
|
|
}
|
|
|
|
b.runConfig.Healthcheck = &healthcheck
|
|
}
|
|
|
|
return b.commit("", b.runConfig.Cmd, fmt.Sprintf("HEALTHCHECK %q", b.runConfig.Healthcheck))
|
|
}
|
|
|
|
// ENTRYPOINT /usr/sbin/nginx
|
|
//
|
|
// Set the entrypoint to /usr/sbin/nginx. Will accept the CMD as the arguments
|
|
// to /usr/sbin/nginx. Uses the default shell if not in JSON format.
|
|
//
|
|
// Handles command processing similar to CMD and RUN, only b.runConfig.Entrypoint
|
|
// is initialized at NewBuilder time instead of through argument parsing.
|
|
//
|
|
func entrypoint(b *Builder, args []string, attributes map[string]bool, original string) error {
|
|
if err := b.flags.Parse(); err != nil {
|
|
return err
|
|
}
|
|
|
|
parsed := handleJSONArgs(args, attributes)
|
|
|
|
switch {
|
|
case attributes["json"]:
|
|
// ENTRYPOINT ["echo", "hi"]
|
|
b.runConfig.Entrypoint = strslice.StrSlice(parsed)
|
|
case len(parsed) == 0:
|
|
// ENTRYPOINT []
|
|
b.runConfig.Entrypoint = nil
|
|
default:
|
|
// ENTRYPOINT echo hi
|
|
b.runConfig.Entrypoint = strslice.StrSlice(append(getShell(b.runConfig), parsed[0]))
|
|
}
|
|
|
|
// when setting the entrypoint if a CMD was not explicitly set then
|
|
// set the command to nil
|
|
if !b.cmdSet {
|
|
b.runConfig.Cmd = nil
|
|
}
|
|
|
|
if err := b.commit("", b.runConfig.Cmd, fmt.Sprintf("ENTRYPOINT %q", b.runConfig.Entrypoint)); err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// EXPOSE 6667/tcp 7000/tcp
|
|
//
|
|
// Expose ports for links and port mappings. This all ends up in
|
|
// b.runConfig.ExposedPorts for runconfig.
|
|
//
|
|
func expose(b *Builder, args []string, attributes map[string]bool, original string) error {
|
|
portsTab := args
|
|
|
|
if len(args) == 0 {
|
|
return errAtLeastOneArgument("EXPOSE")
|
|
}
|
|
|
|
if err := b.flags.Parse(); err != nil {
|
|
return err
|
|
}
|
|
|
|
if b.runConfig.ExposedPorts == nil {
|
|
b.runConfig.ExposedPorts = make(nat.PortSet)
|
|
}
|
|
|
|
ports, _, err := nat.ParsePortSpecs(portsTab)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// instead of using ports directly, we build a list of ports and sort it so
|
|
// the order is consistent. This prevents cache burst where map ordering
|
|
// changes between builds
|
|
portList := make([]string, len(ports))
|
|
var i int
|
|
for port := range ports {
|
|
if _, exists := b.runConfig.ExposedPorts[port]; !exists {
|
|
b.runConfig.ExposedPorts[port] = struct{}{}
|
|
}
|
|
portList[i] = string(port)
|
|
i++
|
|
}
|
|
sort.Strings(portList)
|
|
return b.commit("", b.runConfig.Cmd, fmt.Sprintf("EXPOSE %s", strings.Join(portList, " ")))
|
|
}
|
|
|
|
// USER foo
|
|
//
|
|
// Set the user to 'foo' for future commands and when running the
|
|
// ENTRYPOINT/CMD at container run time.
|
|
//
|
|
func user(b *Builder, args []string, attributes map[string]bool, original string) error {
|
|
if len(args) != 1 {
|
|
return errExactlyOneArgument("USER")
|
|
}
|
|
|
|
if err := b.flags.Parse(); err != nil {
|
|
return err
|
|
}
|
|
|
|
b.runConfig.User = args[0]
|
|
return b.commit("", b.runConfig.Cmd, fmt.Sprintf("USER %v", args))
|
|
}
|
|
|
|
// VOLUME /foo
|
|
//
|
|
// Expose the volume /foo for use. Will also accept the JSON array form.
|
|
//
|
|
func volume(b *Builder, args []string, attributes map[string]bool, original string) error {
|
|
if len(args) == 0 {
|
|
return errAtLeastOneArgument("VOLUME")
|
|
}
|
|
|
|
if err := b.flags.Parse(); err != nil {
|
|
return err
|
|
}
|
|
|
|
if b.runConfig.Volumes == nil {
|
|
b.runConfig.Volumes = map[string]struct{}{}
|
|
}
|
|
for _, v := range args {
|
|
v = strings.TrimSpace(v)
|
|
if v == "" {
|
|
return fmt.Errorf("VOLUME specified can not be an empty string")
|
|
}
|
|
b.runConfig.Volumes[v] = struct{}{}
|
|
}
|
|
if err := b.commit("", b.runConfig.Cmd, fmt.Sprintf("VOLUME %v", args)); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// STOPSIGNAL signal
|
|
//
|
|
// Set the signal that will be used to kill the container.
|
|
func stopSignal(b *Builder, args []string, attributes map[string]bool, original string) error {
|
|
if len(args) != 1 {
|
|
return errExactlyOneArgument("STOPSIGNAL")
|
|
}
|
|
|
|
sig := args[0]
|
|
_, err := signal.ParseSignal(sig)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
b.runConfig.StopSignal = sig
|
|
return b.commit("", b.runConfig.Cmd, fmt.Sprintf("STOPSIGNAL %v", args))
|
|
}
|
|
|
|
// ARG name[=value]
|
|
//
|
|
// Adds the variable foo to the trusted list of variables that can be passed
|
|
// to builder using the --build-arg flag for expansion/subsitution or passing to 'run'.
|
|
// Dockerfile author may optionally set a default value of this variable.
|
|
func arg(b *Builder, args []string, attributes map[string]bool, original string) error {
|
|
if len(args) != 1 {
|
|
return errExactlyOneArgument("ARG")
|
|
}
|
|
|
|
var (
|
|
name string
|
|
value string
|
|
hasDefault bool
|
|
)
|
|
|
|
arg := args[0]
|
|
// 'arg' can just be a name or name-value pair. Note that this is different
|
|
// from 'env' that handles the split of name and value at the parser level.
|
|
// The reason for doing it differently for 'arg' is that we support just
|
|
// defining an arg and not assign it a value (while 'env' always expects a
|
|
// name-value pair). If possible, it will be good to harmonize the two.
|
|
if strings.Contains(arg, "=") {
|
|
parts := strings.SplitN(arg, "=", 2)
|
|
if len(parts[0]) == 0 {
|
|
return errBlankCommandNames("ARG")
|
|
}
|
|
|
|
name = parts[0]
|
|
value = parts[1]
|
|
hasDefault = true
|
|
} else {
|
|
name = arg
|
|
hasDefault = false
|
|
}
|
|
// add the arg to allowed list of build-time args from this step on.
|
|
b.allowedBuildArgs[name] = true
|
|
|
|
// If there is a default value associated with this arg then add it to the
|
|
// b.buildArgs if one is not already passed to the builder. The args passed
|
|
// to builder override the default value of 'arg'.
|
|
if _, ok := b.options.BuildArgs[name]; !ok && hasDefault {
|
|
b.options.BuildArgs[name] = value
|
|
}
|
|
|
|
return b.commit("", b.runConfig.Cmd, fmt.Sprintf("ARG %s", arg))
|
|
}
|
|
|
|
// SHELL powershell -command
|
|
//
|
|
// Set the non-default shell to use.
|
|
func shell(b *Builder, args []string, attributes map[string]bool, original string) error {
|
|
if err := b.flags.Parse(); err != nil {
|
|
return err
|
|
}
|
|
shellSlice := handleJSONArgs(args, attributes)
|
|
switch {
|
|
case len(shellSlice) == 0:
|
|
// SHELL []
|
|
return errAtLeastOneArgument("SHELL")
|
|
case attributes["json"]:
|
|
// SHELL ["powershell", "-command"]
|
|
b.runConfig.Shell = strslice.StrSlice(shellSlice)
|
|
default:
|
|
// SHELL powershell -command - not JSON
|
|
return errNotJSON("SHELL", original)
|
|
}
|
|
return b.commit("", b.runConfig.Cmd, fmt.Sprintf("SHELL %v", shellSlice))
|
|
}
|
|
|
|
func errAtLeastOneArgument(command string) error {
|
|
return fmt.Errorf("%s requires at least one argument", command)
|
|
}
|
|
|
|
func errExactlyOneArgument(command string) error {
|
|
return fmt.Errorf("%s requires exactly one argument", command)
|
|
}
|
|
|
|
func errAtLeastTwoArguments(command string) error {
|
|
return fmt.Errorf("%s requires at least two arguments", command)
|
|
}
|
|
|
|
func errBlankCommandNames(command string) error {
|
|
return fmt.Errorf("%s names can not be blank", command)
|
|
}
|
|
|
|
func errTooManyArguments(command string) error {
|
|
return fmt.Errorf("Bad input to %s, too many arguments", command)
|
|
}
|
|
|
|
// getShell is a helper function which gets the right shell for prefixing the
|
|
// shell-form of RUN, ENTRYPOINT and CMD instructions
|
|
func getShell(c *container.Config) []string {
|
|
if 0 == len(c.Shell) {
|
|
return defaultShell[:]
|
|
}
|
|
return c.Shell[:]
|
|
}
|