support publishing to npm

Makefile

@@ -18,6 +18,7 @@ database/testing \
 mail \
 model \
 plugin/deploy \
+plugin/publish \
 queue
 PKGS := $(addprefix github.com/drone/drone/pkg/,$(PKGS))
 .PHONY := test $(PKGS)

pkg/plugin/publish/npm.go

@@ -1 +1,73 @@
 package publish
+
+import (
+    "fmt"
+
+    "github.com/drone/drone/pkg/build/buildfile"
+)
+
+var npmLoginCmd = `
+npm login <<EOF
+%s
+%s
+%s
+EOF
+`
+
+type NPM struct {
+    // The Email address used by NPM to connect
+    // and publish to a repository
+    Email string `yaml:"email,omitempty"`
+
+    // The Username used by NPM to connect
+    // and publish to a repository
+    Username string `yaml:"username,omitempty"`
+
+    // The Password used by NPM to connect
+    // and publish to a repository
+    Password string `yaml:"password,omitempty"`
+
+    // Fails if the package name and version combination already
+    // exists in the registry. Overwrites when the "--force" flag is set.
+    Force bool `yaml:"force"`
+
+    // The registry URL of custom npm repository
+    Registry string `yaml:"registry,omitempty"`
+
+    // A folder containing the package.json file
+    Folder string `yaml:"folder,omitempty"`
+
+    // Registers the published package with the given tag
+    Tag string `yaml:"tag,omitempty"`
+
+    Branch string `yaml:"branch,omitempty"`
+}
+
+func (n *NPM) Write(f *buildfile.Buildfile) {
+
+    if len(n.Email) == 0 || len(n.Username) == 0 || len(n.Password) == 0 {
+        return
+    }
+
+    npmPublishCmd := "npm publish %s"
+
+    // Setup custom npm registry
+    if n.Registry != "" {
+        f.WriteCmdSilent(fmt.Sprintf("npm config set registry %s", n.Registry))
+    }
+
+    if n.Tag != "" {
+        npmPublishCmd += fmt.Sprintf(" --tag %s", n.Tag)
+    }
+
+    if n.Force {
+        npmPublishCmd += " --force"
+    }
+
+    f.WriteCmdSilent("echo 'publishing to NPM ...'")
+
+    // Login to registry
+    f.WriteCmdSilent(fmt.Sprintf(npmLoginCmd, n.Username, n.Password, n.Email))
+
+    f.WriteCmd(fmt.Sprintf(npmPublishCmd, n.Folder))
+}

pkg/plugin/publish/npm_test.go

@@ -0,0 +1,95 @@
+package publish
+
+import (
+    "strings"
+    "testing"
+
+    "github.com/drone/drone/pkg/build/buildfile"
+
+    "launchpad.net/goyaml"
+)
+
+// emulate Build struct
+type PublishToNPM struct {
+    Publish *Publish `yaml:"publish,omitempty"`
+}
+
+var sampleYml1 = `
+publish:
+  npm:
+    username: foo
+    email: foo@example.com
+    password: bar
+`
+
+var sampleYml2 = `
+publish:
+  npm:
+    username: foo
+    email: foo@example.com
+    password: bar
+    force: true
+`
+
+var sampleYmlWithReg = `
+publish:
+  npm:
+    username: foo
+    email: foo@example.com
+    password: bar
+    registry: https://npm.example.com/me/
+    folder: my-project/node-app/
+    tag: 1.2.3
+`
+
+func setUpWithNPM(input string) (string, error) {
+    var buildStruct PublishToNPM
+    err := goyaml.Unmarshal([]byte(input), &buildStruct)
+    if err != nil {
+        return "", err
+    }
+    bf := buildfile.New()
+    buildStruct.Publish.Write(bf, nil)
+    return bf.String(), err
+}
+
+func TestNPMPublish(t *testing.T) {
+    bscr, err := setUpWithNPM(sampleYml1)
+    if err != nil {
+        t.Fatalf("Can't unmarshal publish script: %s", err)
+    }
+
+    if !strings.Contains(bscr, "npm login") {
+        t.Error("Expect script to contain login command")
+    }
+
+    if !strings.Contains(bscr, "npm publish") {
+        t.Error("Expect script to contain install command")
+    }
+}
+
+func TestNPMForcePublish(t *testing.T) {
+    bscr, err := setUpWithNPM(sampleYml2)
+    if err != nil {
+        t.Fatalf("Can't unmarshal publish script: %s", err)
+    }
+
+    if !strings.Contains(bscr, "npm publish  --force") {
+        t.Error("Expect script to contain install command")
+    }
+}
+
+func TestNPMPublishRegistry(t *testing.T) {
+    bscr, err := setUpWithNPM(sampleYmlWithReg)
+    if err != nil {
+        t.Fatalf("Can't unmarshal publish script: %s", err)
+    }
+
+    if !strings.Contains(bscr, "npm config set registry https://npm.example.com/me/") {
+        t.Error("Expect script to contain npm config registry command")
+    }
+
+    if !strings.Contains(bscr, "npm publish my-project/node-app/ --tag 1.2.3") {
+        t.Error("Expect script to contain npm publish command")
+    }
+}

pkg/plugin/publish/publish.go

@@ -12,6 +12,7 @@ type Publish struct {
 	S3    *S3    `yaml:"s3,omitempty"`
 	Swift *Swift `yaml:"swift,omitempty"`
 	PyPI  *PyPI  `yaml:"pypi,omitempty"`
+	NPM   *NPM   `yaml:"npm,omitempty"`
 }
 
 func (p *Publish) Write(f *buildfile.Buildfile, r *repo.Repo) {
@@ -29,4 +30,9 @@ func (p *Publish) Write(f *buildfile.Buildfile, r *repo.Repo) {
 	if p.PyPI != nil && (len(p.PyPI.Branch) == 0 || (len(p.PyPI.Branch) > 0 && r.Branch == p.PyPI.Branch)) {
 		p.PyPI.Write(f)
 	}
+
+	// NPM
+	if p.NPM != nil && (len(p.NPM.Branch) == 0 || (len(p.NPM.Branch) > 0 && r.Branch == p.NPM.Branch)) {
+		p.NPM.Write(f)
+	}
 }