func testTemplate() (*packer.Template, *packer.ComponentFinder) {
tplData := `{
"variables": {
"foo": null
},
"builders": [
{
"type": "foo"
},
{
"name": "{{user \"foo\"}}",
"type": "bar"
}
]
}
`
tpl, err := packer.ParseTemplate([]byte(tplData), map[string]string{"foo": "bar"})
if err != nil {
panic(err)
}
cf := &packer.ComponentFinder{
Builder: func(string) (packer.Builder, error) { return new(packer.MockBuilder), nil },
}
return tpl, cf
}
func (p *Provider) NewTemplate() (*packer.Template, error) {
template, err := packer.ParseTemplate(p.Builder, p.Vars)
if err != nil {
return nil, fmt.Errorf("Failed to parse template: %s", err)
}
return template, nil
}
func testTemplate() (*packer.Template, *packer.ComponentFinder) {
tplData := `{
"builders": [
{
"type": "foo"
},
{
"type": "bar"
}
]
}`
tpl, err := packer.ParseTemplate([]byte(tplData))
if err != nil {
panic(err)
}
cf := &packer.ComponentFinder{
Builder: func(string) (packer.Builder, error) { return new(packer.MockBuilder), nil },
}
return tpl, cf
}
func (c Command) Run(env packer.Environment, args []string) int {
var cfgDebug bool
var cfgExcept []string
var cfgOnly []string
cmdFlags := flag.NewFlagSet("build", flag.ContinueOnError)
cmdFlags.Usage = func() { env.Ui().Say(c.Help()) }
cmdFlags.BoolVar(&cfgDebug, "debug", false, "debug mode for builds")
cmdFlags.Var((*stringSliceValue)(&cfgExcept), "except", "build all builds except these")
cmdFlags.Var((*stringSliceValue)(&cfgOnly), "only", "only build the given builds by name")
if err := cmdFlags.Parse(args); err != nil {
return 1
}
args = cmdFlags.Args()
if len(args) != 1 {
cmdFlags.Usage()
return 1
}
if len(cfgOnly) > 0 && len(cfgExcept) > 0 {
env.Ui().Error("Only one of '-except' or '-only' may be specified.\n")
env.Ui().Error(c.Help())
return 1
}
// Read the file into a byte array so that we can parse the template
log.Printf("Reading template: %s", args[0])
tplData, err := ioutil.ReadFile(args[0])
if err != nil {
env.Ui().Error(fmt.Sprintf("Failed to read template file: %s", err))
return 1
}
// Parse the template into a machine-usable format
log.Println("Parsing template...")
tpl, err := packer.ParseTemplate(tplData)
if err != nil {
env.Ui().Error(fmt.Sprintf("Failed to parse template: %s", err))
return 1
}
// The component finder for our builds
components := &packer.ComponentFinder{
Builder: env.Builder,
Hook: env.Hook,
PostProcessor: env.PostProcessor,
Provisioner: env.Provisioner,
}
// Go through each builder and compile the builds that we care about
buildNames := tpl.BuildNames()
builds := make([]packer.Build, 0, len(buildNames))
for _, buildName := range buildNames {
if len(cfgExcept) > 0 {
found := false
for _, only := range cfgExcept {
if buildName == only {
found = true
break
}
}
if found {
log.Printf("Skipping build '%s' because specified by -except.", buildName)
continue
}
}
if len(cfgOnly) > 0 {
found := false
for _, only := range cfgOnly {
if buildName == only {
found = true
break
}
}
if !found {
log.Printf("Skipping build '%s' because not specified by -only.", buildName)
continue
}
}
log.Printf("Creating build: %s", buildName)
build, err := tpl.Build(buildName, components)
if err != nil {
env.Ui().Error(fmt.Sprintf("Failed to create build '%s': \n\n%s", buildName, err))
return 1
}
builds = append(builds, build)
}
if cfgDebug {
env.Ui().Say("Debug mode enabled. Builds will not be parallelized.")
}
// Compile all the UIs for the builds
colors := [5]packer.UiColor{
packer.UiColorGreen,
packer.UiColorCyan,
packer.UiColorMagenta,
packer.UiColorYellow,
packer.UiColorBlue,
}
buildUis := make(map[string]packer.Ui)
for i, b := range builds {
ui := &packer.ColoredUi{
Color: colors[i%len(colors)],
Ui: env.Ui(),
}
buildUis[b.Name()] = ui
ui.Say(fmt.Sprintf("%s output will be in this color.", b.Name()))
}
// Add a newline between the color output and the actual output
env.Ui().Say("")
log.Printf("Build debug mode: %v", cfgDebug)
// Set the debug mode and prepare all the builds
for _, b := range builds {
log.Printf("Preparing build: %s", b.Name())
b.SetDebug(cfgDebug)
err := b.Prepare()
if err != nil {
env.Ui().Error(err.Error())
return 1
}
}
// Run all the builds in parallel and wait for them to complete
var interruptWg, wg sync.WaitGroup
interrupted := false
artifacts := make(map[string][]packer.Artifact)
errors := make(map[string]error)
for _, b := range builds {
// Increment the waitgroup so we wait for this item to finish properly
wg.Add(1)
// Handle interrupts for this build
sigCh := make(chan os.Signal, 1)
signal.Notify(sigCh, os.Interrupt)
defer signal.Stop(sigCh)
go func(b packer.Build) {
<-sigCh
interruptWg.Add(1)
defer interruptWg.Done()
interrupted = true
log.Printf("Stopping build: %s", b.Name())
b.Cancel()
log.Printf("Build cancelled: %s", b.Name())
}(b)
// Run the build in a goroutine
go func(b packer.Build) {
defer wg.Done()
name := b.Name()
log.Printf("Starting build run: %s", name)
ui := buildUis[name]
runArtifacts, err := b.Run(ui, env.Cache())
if err != nil {
ui.Error(fmt.Sprintf("Build '%s' errored: %s", name, err))
errors[name] = err
} else {
ui.Say(fmt.Sprintf("Build '%s' finished.", name))
artifacts[name] = runArtifacts
}
}(b)
if cfgDebug {
log.Printf("Debug enabled, so waiting for build to finish: %s", b.Name())
wg.Wait()
}
if interrupted {
log.Println("Interrupted, not going to start any more builds.")
break
}
}
// Wait for both the builds to complete and the interrupt handler,
// if it is interrupted.
log.Printf("Waiting on builds to complete...")
wg.Wait()
log.Printf("Builds completed. Waiting on interrupt barrier...")
interruptWg.Wait()
if interrupted {
env.Ui().Say("Cleanly cancelled builds after being interrupted.")
return 1
}
if len(errors) > 0 {
env.Ui().Error("\n==> Some builds didn't complete successfully and had errors:")
for name, err := range errors {
env.Ui().Error(fmt.Sprintf("--> %s: %s", name, err))
}
}
if len(artifacts) > 0 {
env.Ui().Say("\n==> Builds finished. The artifacts of successful builds are:")
for name, buildArtifacts := range artifacts {
for _, artifact := range buildArtifacts {
var message bytes.Buffer
fmt.Fprintf(&message, "--> %s: ", name)
if artifact != nil {
fmt.Fprintf(&message, artifact.String())
} else {
fmt.Fprint(&message, "<nothing>")
}
env.Ui().Say(message.String())
}
}
} else {
env.Ui().Say("\n==> Builds finished but no artifacts were created.")
}
return 0
}
func (c Command) Run(env packer.Environment, args []string) int {
var cfgSyntaxOnly bool
cmdFlags := flag.NewFlagSet("validate", flag.ContinueOnError)
cmdFlags.Usage = func() { env.Ui().Say(c.Help()) }
cmdFlags.BoolVar(&cfgSyntaxOnly, "syntax-only", false, "check syntax only")
if err := cmdFlags.Parse(args); err != nil {
return 1
}
args = cmdFlags.Args()
if len(args) != 1 {
cmdFlags.Usage()
return 1
}
// Read the file into a byte array so that we can parse the template
log.Printf("Reading template: %s", args[0])
tplData, err := ioutil.ReadFile(args[0])
if err != nil {
env.Ui().Error(fmt.Sprintf("Failed to read template file: %s", err))
return 1
}
// Parse the template into a machine-usable format
log.Println("Parsing template...")
tpl, err := packer.ParseTemplate(tplData)
if err != nil {
env.Ui().Error(fmt.Sprintf("Failed to parse template: %s", err))
return 1
}
if cfgSyntaxOnly {
env.Ui().Say("Syntax-only check passed. Everything looks okay.")
return 0
}
errs := make([]error, 0)
// The component finder for our builds
components := &packer.ComponentFinder{
Builder: env.Builder,
Hook: env.Hook,
PostProcessor: env.PostProcessor,
Provisioner: env.Provisioner,
}
// Otherwise, get all the builds
buildNames := tpl.BuildNames()
builds := make([]packer.Build, 0, len(buildNames))
for _, buildName := range buildNames {
log.Printf("Creating build from template for: %s", buildName)
build, err := tpl.Build(buildName, components)
if err != nil {
errs = append(errs, fmt.Errorf("Build '%s': %s", buildName, err))
continue
}
builds = append(builds, build)
}
// Check the configuration of all builds
for _, b := range builds {
log.Printf("Preparing build: %s", b.Name())
err := b.Prepare()
if err != nil {
errs = append(errs, fmt.Errorf("Errors validating build '%s'. %s", b.Name(), err))
}
}
if len(errs) > 0 {
env.Ui().Error("Template validation failed. Errors are shown below.\n")
for i, err := range errs {
env.Ui().Error(err.Error())
if (i + 1) < len(errs) {
env.Ui().Error("")
}
}
return 1
}
env.Ui().Say("Template validated successfully.")
return 0
}