Initial podman build

Signed-off-by: TomSweeneyRedHat <tsweeney@redhat.com>

Closes: #162
Approved by: rhatdan

1 files changed, 128 insertions, 0 deletions

diff --git a/cmd/podman/build.go b/cmd/podman/build.go
new file mode 100644
index 000000000..0defb5e79
--- /dev/null
+++ b/cmd/podman/build.go
@@ -0,0 +1,128 @@
+package main
+
+import (
+	"os"
+	"os/exec"
+	"strconv"
+
+	"github.com/pkg/errors"
+	"github.com/urfave/cli"
+)
+
+var (
+	buildFlags = []cli.Flag{
+		cli.StringSliceFlag{
+			Name:  "build-arg",
+			Usage: "`argument=value` to supply to the builder",
+		},
+		cli.StringSliceFlag{
+			Name:  "file, f",
+			Usage: "`pathname or URL` of a Dockerfile",
+		},
+		cli.StringFlag{
+			Name:  "format",
+			Usage: "`format` of the built image's manifest and metadata",
+		},
+		cli.BoolFlag{
+			Name:  "pull-always",
+			Usage: "pull the image, even if a version is present",
+		},
+		cli.BoolFlag{
+			Name:  "quiet, q",
+			Usage: "refrain from announcing build instructions and image read/write progress",
+		},
+		cli.StringFlag{
+			Name:  "runtime",
+			Usage: "`path` to an alternate runtime",
+		},
+		cli.StringSliceFlag{
+			Name:  "runtime-flag",
+			Usage: "add global flags for the container runtime",
+		},
+		cli.StringFlag{
+			Name:  "signature-policy",
+			Usage: "`pathname` of signature policy file (not usually used)",
+		},
+		cli.StringSliceFlag{
+			Name:  "tag, t",
+			Usage: "`tag` to apply to the built image",
+		},
+		cli.BoolFlag{
+			Name:  "tls-verify",
+			Usage: "require HTTPS and verify certificates when accessing the registry",
+		},
+	}
+	buildDescription = "podman build launches the Buildah command to build an OCI Image. Buildah must be installed for this command to work."
+	buildCommand     = cli.Command{
+		Name:        "build",
+		Aliases:     []string{"build"},
+		Usage:       "Build an image using instructions in a Dockerfile",
+		Description: buildDescription,
+		Flags:       buildFlags,
+		Action:      buildCmd,
+		ArgsUsage:   "CONTEXT-DIRECTORY | URL",
+	}
+)
+
+func buildCmd(c *cli.Context) error {
+
+	budCmdArgs := []string{"bud"}
+
+	for _, buildArg := range c.StringSlice("build-arg") {
+		budCmdArgs = append(budCmdArgs, "--build-arg", buildArg)
+	}
+	for _, fileName := range c.StringSlice("file") {
+		budCmdArgs = append(budCmdArgs, "--file", fileName)
+	}
+	if c.IsSet("format") {
+		budCmdArgs = append(budCmdArgs, "--format", c.String("format"))
+	}
+	if c.IsSet("pull-always") {
+		budCmdArgs = append(budCmdArgs, "--pull-always")
+	}
+	if c.IsSet("quiet") {
+		quietParam := "--quiet=" + strconv.FormatBool(c.Bool("quiet"))
+		budCmdArgs = append(budCmdArgs, quietParam)
+	}
+	if c.IsSet("runtime") {
+		budCmdArgs = append(budCmdArgs, "--runtime", c.String("runtime"))
+	}
+	for _, runtimeArg := range c.StringSlice("runtime-flag") {
+		budCmdArgs = append(budCmdArgs, "--runtime-flag", runtimeArg)
+	}
+	if c.IsSet("signature-policy") {
+		budCmdArgs = append(budCmdArgs, "--signature-policy", c.String("signature-policy"))
+	}
+	for _, tagArg := range c.StringSlice("tag") {
+		budCmdArgs = append(budCmdArgs, "--tag", tagArg)
+	}
+	if c.IsSet("tls-verify") {
+		tlsParam := "--tls-verify=" + strconv.FormatBool(c.Bool("tls-verify"))
+		budCmdArgs = append(budCmdArgs, tlsParam)
+	}
+
+	if len(c.Args()) > 0 {
+		budCmdArgs = append(budCmdArgs, c.Args()...)
+	}
+
+	buildah := "buildah"
+
+	if _, err := exec.LookPath(buildah); err != nil {
+		return errors.Wrapf(err, "buildah not found in PATH")
+	}
+	if _, err := exec.Command(buildah).Output(); err != nil {
+		return errors.Wrapf(err, "buildah is not operational on this server")
+	}
+
+	cmd := exec.Command(buildah, budCmdArgs...)
+
+	cmd.Stdin = os.Stdin
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+
+	if err := cmd.Run(); err != nil {
+		return errors.Wrapf(err, "error running the buildah build-using-dockerfile (bud) command")
+	}
+
+	return nil
+}