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package main
import (
"io/ioutil"
"os"
"path/filepath"
"strings"
"github.com/pkg/errors"
"github.com/projectatomic/buildah/imagebuildah"
buildahcli "github.com/projectatomic/buildah/pkg/cli"
"github.com/projectatomic/buildah/pkg/parse"
"github.com/projectatomic/libpod/cmd/podman/libpodruntime"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
)
var (
buildDescription = "Builds an OCI or Docker image using instructions from one\n" +
"or more Dockerfiles and a specified build context directory."
buildCommand = cli.Command{
Name: "build",
Usage: "build an image using instructions from Dockerfiles",
Description: buildDescription,
Flags: append(buildahcli.BudFlags, buildahcli.FromAndBudFlags...),
Action: buildCmd,
ArgsUsage: "CONTEXT-DIRECTORY | URL",
SkipArgReorder: true,
}
)
func buildCmd(c *cli.Context) error {
// The following was taken directly from projectatomic/buildah/cmd/bud.go
// TODO Find a away to vendor more of this in rather than copy from bud
output := ""
tags := []string{}
if c.IsSet("tag") || c.IsSet("t") {
tags = c.StringSlice("tag")
if len(tags) > 0 {
output = tags[0]
tags = tags[1:]
}
}
pullPolicy := imagebuildah.PullNever
if c.BoolT("pull") {
pullPolicy = imagebuildah.PullIfMissing
}
if c.Bool("pull-always") {
pullPolicy = imagebuildah.PullAlways
}
args := make(map[string]string)
if c.IsSet("build-arg") {
for _, arg := range c.StringSlice("build-arg") {
av := strings.SplitN(arg, "=", 2)
if len(av) > 1 {
args[av[0]] = av[1]
} else {
delete(args, av[0])
}
}
}
dockerfiles := c.StringSlice("file")
format := "oci"
if c.IsSet("format") {
format = strings.ToLower(c.String("format"))
}
if strings.HasPrefix(format, "oci") {
format = imagebuildah.OCIv1ImageFormat
} else if strings.HasPrefix(format, "docker") {
format = imagebuildah.Dockerv2ImageFormat
} else {
return errors.Errorf("unrecognized image type %q", format)
}
contextDir := ""
cliArgs := c.Args()
if len(cliArgs) > 0 {
// The context directory could be a URL. Try to handle that.
tempDir, subDir, err := imagebuildah.TempDirForURL("", "buildah", cliArgs[0])
if err != nil {
return errors.Wrapf(err, "error prepping temporary context directory")
}
if tempDir != "" {
// We had to download it to a temporary directory.
// Delete it later.
defer func() {
if err = os.RemoveAll(tempDir); err != nil {
logrus.Errorf("error removing temporary directory %q: %v", contextDir, err)
}
}()
contextDir = filepath.Join(tempDir, subDir)
} else {
// Nope, it was local. Use it as is.
absDir, err := filepath.Abs(cliArgs[0])
if err != nil {
return errors.Wrapf(err, "error determining path to directory %q", cliArgs[0])
}
contextDir = absDir
}
cliArgs = cliArgs.Tail()
} else {
// No context directory or URL was specified. Try to use the
// home of the first locally-available Dockerfile.
for i := range dockerfiles {
if strings.HasPrefix(dockerfiles[i], "http://") ||
strings.HasPrefix(dockerfiles[i], "https://") ||
strings.HasPrefix(dockerfiles[i], "git://") ||
strings.HasPrefix(dockerfiles[i], "github.com/") {
continue
}
absFile, err := filepath.Abs(dockerfiles[i])
if err != nil {
return errors.Wrapf(err, "error determining path to file %q", dockerfiles[i])
}
contextDir = filepath.Dir(absFile)
dockerfiles[i], err = filepath.Rel(contextDir, absFile)
if err != nil {
return errors.Wrapf(err, "error determining path to file %q", dockerfiles[i])
}
break
}
}
if contextDir == "" {
return errors.Errorf("no context directory specified, and no dockerfile specified")
}
if len(dockerfiles) == 0 {
dockerfiles = append(dockerfiles, filepath.Join(contextDir, "Dockerfile"))
}
if err := parse.ValidateFlags(c, buildahcli.BudFlags); err != nil {
return err
}
runtimeFlags := []string{}
for _, arg := range c.StringSlice("runtime-flag") {
runtimeFlags = append(runtimeFlags, "--"+arg)
}
// end from buildah
runtime, err := libpodruntime.GetRuntime(c)
if err != nil {
return errors.Wrapf(err, "could not get runtime")
}
defer runtime.Shutdown(false)
var stdout, stderr, reporter *os.File
stdout = os.Stdout
stderr = os.Stderr
reporter = os.Stderr
if c.IsSet("logfile") {
f, err := os.OpenFile(c.String("logfile"), os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0600)
if err != nil {
return errors.Errorf("error opening logfile %q: %v", c.String("logfile"), err)
}
defer f.Close()
logrus.SetOutput(f)
stdout = f
stderr = f
reporter = f
}
systemContext, err := parse.SystemContextFromOptions(c)
if err != nil {
return errors.Wrapf(err, "error building system context")
}
commonOpts, err := parse.CommonBuildOptions(c)
if err != nil {
return err
}
namespaceOptions, networkPolicy, err := parse.NamespaceOptions(c)
if err != nil {
return errors.Wrapf(err, "error parsing namespace-related options")
}
usernsOption, idmappingOptions, err := parse.IDMappingOptions(c)
if err != nil {
return errors.Wrapf(err, "error parsing ID mapping options")
}
namespaceOptions.AddOrReplace(usernsOption...)
options := imagebuildah.BuildOptions{
ContextDirectory: contextDir,
PullPolicy: pullPolicy,
Compression: imagebuildah.Gzip,
Quiet: c.Bool("quiet"),
SignaturePolicyPath: c.String("signature-policy"),
Args: args,
Output: output,
AdditionalTags: tags,
Out: stdout,
Err: stderr,
ReportWriter: reporter,
Runtime: c.String("runtime"),
RuntimeArgs: runtimeFlags,
OutputFormat: format,
SystemContext: systemContext,
NamespaceOptions: namespaceOptions,
ConfigureNetwork: networkPolicy,
CNIPluginPath: c.String("cni-plugin-path"),
CNIConfigDir: c.String("cni-config-dir"),
IDMappingOptions: idmappingOptions,
CommonBuildOpts: commonOpts,
DefaultMountsFilePath: c.GlobalString("default-mounts-file"),
IIDFile: c.String("iidfile"),
Squash: c.Bool("squash"),
Labels: c.StringSlice("label"),
Annotations: c.StringSlice("annotation"),
Layers: c.Bool("layers"),
NoCache: c.Bool("no-cache"),
RemoveIntermediateCtrs: c.BoolT("rm"),
ForceRmIntermediateCtrs: c.Bool("force-rm"),
}
if c.Bool("quiet") {
options.ReportWriter = ioutil.Discard
}
return runtime.Build(getContext(), options, dockerfiles...)
}
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