Adding initial barebones for the xenserver packer plugin.

Signed-off-by: Rob Dobson <rob.dobson@citrix.com>

builder/xenserver/builder.go

@@ -0,0 +1,96 @@
+package xenserver
+
+import (
+    "github.com/mitchellh/multistep"
+    "github.com/mitchellh/packer/packer"
+    "github.com/mitchellh/packer/common"
+    "fmt"
+    "log"
+    "errors"
+)
+
+
+// Set the unique ID for this builder
+const BuilderId = "packer.xenserver"
+
+
+type config struct {
+    common.PackerConfig `mapstructure:",squash"`
+
+    Username        string  `mapstructure:"username"`
+    Password        string  `mapstructure:"password"`
+    HostIp          string  `mapstructure:"host_ip"`
+    IsoUrl          string  `mapstructure:"iso_url"`
+
+    InstanceName    string  `mapstructure:"instance_name"`
+
+    tpl *packer.ConfigTemplate
+}
+
+
+type Builder struct {
+    config config
+    runner multistep.Runner
+}
+
+
+func (self *Builder) Prepare (raws ...interface{}) ([]string, error) {
+
+    md, err := common.DecodeConfig(&self.config, raws...)
+    if err != nil {
+        return nil, err
+    }
+
+    self.config.tpl, err = packer.NewConfigTemplate()
+
+    if err != nil {
+        return nil, err
+    }
+
+    self.config.tpl.UserVars = self.config.PackerUserVars
+
+
+    errs := common.CheckUnusedConfig(md)
+
+
+    // Set default vaules
+
+    templates := map[string]*string {
+        "username":         &self.config.Username,
+        "password":         &self.config.Password,
+        "host_ip":          &self.config.HostIp,
+        "iso_url":          &self.config.IsoUrl,
+        "instance_name":    &self.config.InstanceName,
+    }
+
+
+    for n, ptr := range templates {
+        var err error
+        *ptr, err = self.config.tpl.Process(*ptr, nil)
+        if err != nil {
+            errs = packer.MultiErrorAppend(errs, fmt.Errorf("Error processing %s: %s", n, err))
+        }
+    }
+
+    if self.config.IsoUrl == "" {
+        errs = packer.MultiErrorAppend(
+                errs, errors.New("a iso url must be specified"))
+    }
+    return nil, nil
+
+}
+
+func (self *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packer.Artifact, error) {
+    log.Println("Run, not yet implemented!")
+    return nil, nil
+}
+
+
+func (self *Builder) Cancel() {
+    if self.runner != nil {
+        log.Println("Cancelling the step runner...")
+        self.runner.Cancel()
+    }
+    fmt.Println("Cancelling the builder")
+}
+

main.go

@@ -0,0 +1,15 @@
+package main
+
+import (
+    "github.com/rdobson/packer-builder-xenserver/builder/xenserver"
+    "github.com/mitchellh/packer/packer/plugin"
+)
+
+func main() {
+    server, err := plugin.Server()
+    if err != nil {
+        panic(err)
+    }
+    server.RegisterBuilder(new(xenserver.Builder))
+    server.Serve()
+}