Enable deployment via ssh

pkg/plugin/deploy/ssh.go

@@ -1 +1,96 @@
 package deploy
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/drone/drone/pkg/build/buildfile"
+)
+
+// SSH struct holds configuration data for deployment
+// via ssh, deployment done by scp-ing file(s) listed
+// in artifacts to the target host, and then run cmd
+// remotely.
+// It is assumed that the target host already
+// add this repo public key in the host's `authorized_hosts`
+// file. And the private key is already copied to `.ssh/id_rsa`
+// inside the build container. No further check will be done.
+type SSH struct {
+
+	// Target is the deployment host in this format
+	//   user@hostname:/full/path <PORT>
+	//
+	// PORT may be omitted if its default to port 22.
+	Target string `yaml:"target,omitempty"`
+
+	// Artifacts is a list of files/dirs to be deployed
+	// to the target host. If artifacts list more than one file
+	// it will be compressed into a single tar.gz file.
+	// if artifacts contain:
+	//   - GITARCHIVE
+	//
+	// other file listed in artifacts will be ignored, instead, we will
+	// create git archive from the current revision and deploy that file
+	// alone.
+	// If you need to deploy the git archive along with some other files,
+	// please use build script to create the git archive, and then list
+	// the archive name here with the other files.
+	Artifacts []string `yaml:"artifacts,omitempty"`
+
+	// Cmd is a single command executed at target host after the artifacts
+	// is deployed.
+	Cmd string `yaml:"cmd,omitempty"`
+}
+
+// Write down the buildfile
+func (s *SSH) Write(f *buildfile.Buildfile) {
+	host := strings.SplitN(s.Target, " ", 2)
+	if len(host) == 1 {
+		host = append(host, "22")
+	}
+	if _, err := strconv.Atoi(host[1]); err != nil {
+		host[1] = "22"
+	}
+
+	// Is artifact created?
+	artifact := false
+
+	for _, a := range s.Artifacts {
+		if a == "GITARCHIVE" {
+			artifact = createGitArchive(f)
+			break
+		}
+	}
+
+	if len(s.Artifacts) > 1 && !artifact {
+		artifact = compress(f, s.Artifacts)
+	} else if len(s.Artifacts) == 1 {
+		f.WriteCmdSilent(fmt.Sprintf("ARTIFACT=%s", s.Artifacts[0]))
+		artifact = true
+	}
+
+	if artifact {
+		scpCmd := "scp -o StrictHostKeyChecking=no -P %s ${ARTIFACT} %s"
+		f.WriteCmd(fmt.Sprintf(scpCmd, host[1], host[0]))
+	}
+
+	if len(s.Cmd) > 0 {
+		sshCmd := "ssh -o StrictHostKeyChecking=no -p %s %s %s"
+		f.WriteCmd(fmt.Sprintf(sshCmd, host[1], strings.SplitN(host[0], ":", 2)[0], s.Cmd))
+	}
+}
+
+func createGitArchive(f *buildfile.Buildfile) bool {
+	f.WriteCmdSilent("COMMIT=$(git rev-parse HEAD)")
+	f.WriteCmdSilent("ARTIFACT=${PWD##*/}-${COMMIT}.tar.gz")
+	f.WriteCmdSilent("git archive --format=tar.gz --prefix=${PWD##*/}/ ${COMMIT} > ${ARTIFACT}")
+	return true
+}
+
+func compress(f *buildfile.Buildfile, files []string) bool {
+	cmd := "tar -cf ${ARTIFACT} %s"
+	f.WriteCmdSilent("ARTIFACT=${PWD##*/}.tar.gz")
+	f.WriteCmdSilent(fmt.Sprintf(cmd, strings.Join(files, " ")))
+	return true
+}