vendor of containers/common

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

vendor/github.com/containers/common/pkg/version/version.go

@@ -0,0 +1,105 @@
+package version
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+const (
+	UnknownPackage = "Unknown"
+)
+
+// Note: This function is copied from containers/podman libpod/util.go
+// Please see https://github.com/containers/common/pull/1460
+func queryPackageVersion(cmdArg ...string) string {
+	output := UnknownPackage
+	if 1 < len(cmdArg) {
+		cmd := exec.Command(cmdArg[0], cmdArg[1:]...)
+		if outp, err := cmd.Output(); err == nil {
+			output = string(outp)
+			deb := false
+			if cmdArg[0] == "/usr/bin/dlocate" {
+				// can return multiple matches
+				l := strings.Split(output, "\n")
+				output = l[0]
+				deb = true
+			} else if cmdArg[0] == "/usr/bin/dpkg" {
+				deb = true
+			}
+			if deb {
+				r := strings.Split(output, ": ")
+				queryFormat := `${Package}_${Version}_${Architecture}`
+				cmd = exec.Command("/usr/bin/dpkg-query", "-f", queryFormat, "-W", r[0])
+				if outp, err := cmd.Output(); err == nil {
+					output = string(outp)
+				}
+			}
+		}
+		if cmdArg[0] == "/sbin/apk" {
+			prefix := cmdArg[len(cmdArg)-1] + " is owned by "
+			output = strings.Replace(output, prefix, "", 1)
+		}
+	}
+	return strings.Trim(output, "\n")
+}
+
+// Note: This function is copied from containers/podman libpod/util.go
+// Please see https://github.com/containers/common/pull/1460
+func Package(program string) string { // program is full path
+	_, err := os.Stat(program)
+	if err != nil {
+		return UnknownPackage
+	}
+	packagers := [][]string{
+		{"/usr/bin/rpm", "-q", "-f"},
+		{"/usr/bin/dlocate", "-F"},             // Debian, Ubuntu (quick)
+		{"/usr/bin/dpkg", "-S"},                // Debian, Ubuntu (slow)
+		{"/usr/bin/pacman", "-Qo"},             // Arch
+		{"/usr/bin/qfile", "-qv"},              // Gentoo (quick)
+		{"/usr/bin/equery", "b"},               // Gentoo (slow)
+		{"/sbin/apk", "info", "-W"},            // Alpine
+		{"/usr/local/sbin/pkg", "which", "-q"}, // FreeBSD
+	}
+
+	for _, cmd := range packagers {
+		cmd = append(cmd, program)
+		if out := queryPackageVersion(cmd...); out != UnknownPackage {
+			return out
+		}
+	}
+	return UnknownPackage
+}
+
+// Note: This function is copied from containers/podman libpod/util.go
+// Please see https://github.com/containers/common/pull/1460
+func Program(name string) (string, error) {
+	return program(name, false)
+}
+
+func ProgramDnsname(name string) (string, error) {
+	return program(name, true)
+}
+
+func program(program string, dnsname bool) (string, error) {
+	cmd := exec.Command(program, "--version")
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+	cmd.Stdout = &stdout
+	cmd.Stderr = &stderr
+
+	err := cmd.Run()
+	if err != nil {
+		return "", fmt.Errorf("`%v --version` failed: %v %v (%v)", program, stderr.String(), stdout.String(), err)
+	}
+
+	output := strings.TrimSuffix(stdout.String(), "\n")
+	// dnsname --version returns the information to stderr
+	if dnsname {
+		output = strings.TrimSuffix(stderr.String(), "\n")
+	}
+
+	return output, nil
+}