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packer: template now handles user var logic

This commit is contained in:
Mitchell Hashimoto 2013-12-27 09:17:51 -07:00
parent eeadafc452
commit 6a3dd16a3a
4 changed files with 190 additions and 174 deletions
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48
packer/build.go
View File

@ -40,7 +40,7 @@ type Build interface {
// Prepare configures the various components of this build and reports
// any errors in doing so (such as syntax errors, validation errors, etc.).
// It also reports any warnings.
Prepare(v map[string]string) ([]string, error)
Prepare() ([]string, error)
// Run runs the actual builder, returning an artifact implementation
// of what is built. If anything goes wrong, an error is returned.
@ -78,7 +78,7 @@ type coreBuild struct {
hooks map[string][]Hook
postProcessors [][]coreBuildPostProcessor
provisioners []coreBuildProvisioner
variables map[string]coreBuildVariable
variables map[string]string
debug bool
force bool
@ -102,12 +102,6 @@ type coreBuildProvisioner struct {
config []interface{}
}
// A user-variable that is part of a single build.
type coreBuildVariable struct {
Default string
Required bool
}
// Returns the name of the build.
func (b *coreBuild) Name() string {
return b.name
@ -116,7 +110,7 @@ func (b *coreBuild) Name() string {
// Prepare prepares the build by doing some initialization for the builder
// and any hooks. This _must_ be called prior to Run. The parameter is the
// overrides for the variables within the template (if any).
func (b *coreBuild) Prepare(userVars map[string]string) (warn []string, err error) {
func (b *coreBuild) Prepare() (warn []string, err error) {
b.l.Lock()
defer b.l.Unlock()
@ -126,46 +120,12 @@ func (b *coreBuild) Prepare(userVars map[string]string) (warn []string, err erro
b.prepareCalled = true
// Compile the variables
varErrs := make([]error, 0)
variables := make(map[string]string)
for k, v := range b.variables {
variables[k] = v.Default
if v.Required {
if _, ok := userVars[k]; !ok {
varErrs = append(varErrs,
fmt.Errorf("Required user variable '%s' not set", k))
}
}
}
if userVars != nil {
for k, v := range userVars {
if _, ok := variables[k]; !ok {
varErrs = append(
varErrs, fmt.Errorf("Unknown user variable: %s", k))
continue
}
variables[k] = v
}
}
// If there were any problem with variables, return an error right
// away because we can't be certain anything else will actually work.
if len(varErrs) > 0 {
return nil, &MultiError{
Errors: varErrs,
}
}
packerConfig := map[string]interface{}{
BuildNameConfigKey: b.name,
BuilderTypeConfigKey: b.builderType,
DebugConfigKey: b.debug,
ForceConfigKey: b.force,
UserVariablesConfigKey: variables,
UserVariablesConfigKey: b.variables,
}
// Prepare the builder

92
packer/build_test.go
View File

@ -22,7 +22,7 @@ func testBuild() *coreBuild {
coreBuildPostProcessor{&TestPostProcessor{artifactId: "pp"}, "testPP", make(map[string]interface{}), true},
},
},
variables: make(map[string]coreBuildVariable),
variables: make(map[string]string),
}
}
@ -48,7 +48,7 @@ func TestBuild_Prepare(t *testing.T) {
build := testBuild()
builder := build.builder.(*MockBuilder)
build.Prepare(nil)
build.Prepare()
if !builder.PrepareCalled {
t.Fatal("should be called")
}
@ -77,7 +77,7 @@ func TestBuild_Prepare(t *testing.T) {
func TestBuild_Prepare_Twice(t *testing.T) {
build := testBuild()
warn, err := build.Prepare(nil)
warn, err := build.Prepare()
if len(warn) > 0 {
t.Fatalf("bad: %#v", warn)
}
@ -96,7 +96,7 @@ func TestBuild_Prepare_Twice(t *testing.T) {
}
}()
build.Prepare(nil)
build.Prepare()
}
func TestBuildPrepare_BuilderWarniings(t *testing.T) {
@ -106,7 +106,7 @@ func TestBuildPrepare_BuilderWarniings(t *testing.T) {
builder := build.builder.(*MockBuilder)
builder.PrepareWarnings = expected
warn, err := build.Prepare(nil)
warn, err := build.Prepare()
if err != nil {
t.Fatalf("err: %s", err)
}
@ -123,7 +123,7 @@ func TestBuild_Prepare_Debug(t *testing.T) {
builder := build.builder.(*MockBuilder)
build.SetDebug(true)
build.Prepare(nil)
build.Prepare()
if !builder.PrepareCalled {
t.Fatalf("should be called")
}
@ -148,10 +148,10 @@ func TestBuildPrepare_variables_default(t *testing.T) {
}
build := testBuild()
build.variables["foo"] = coreBuildVariable{Default: "bar"}
build.variables["foo"] = "bar"
builder := build.builder.(*MockBuilder)
warn, err := build.Prepare(nil)
warn, err := build.Prepare()
if len(warn) > 0 {
t.Fatalf("bad: %#v", warn)
}
@ -168,76 +168,12 @@ func TestBuildPrepare_variables_default(t *testing.T) {
}
}
func TestBuildPrepare_variables_nonexist(t *testing.T) {
build := testBuild()
build.variables["foo"] = coreBuildVariable{Default: "bar"}
warn, err := build.Prepare(map[string]string{"bar": "baz"})
if len(warn) > 0 {
t.Fatalf("bad: %#v", warn)
}
if err == nil {
t.Fatal("should have had error")
}
}
func TestBuildPrepare_variables_override(t *testing.T) {
packerConfig := testDefaultPackerConfig()
packerConfig[UserVariablesConfigKey] = map[string]string{
"foo": "baz",
}
build := testBuild()
build.variables["foo"] = coreBuildVariable{Default: "bar"}
builder := build.builder.(*MockBuilder)
warn, err := build.Prepare(map[string]string{"foo": "baz"})
if len(warn) > 0 {
t.Fatalf("bad: %#v", warn)
}
if err != nil {
t.Fatalf("err: %s", err)
}
if !builder.PrepareCalled {
t.Fatal("prepare should be called")
}
if !reflect.DeepEqual(builder.PrepareConfig[1], packerConfig) {
t.Fatalf("prepare bad: %#v", builder.PrepareConfig[1])
}
}
func TestBuildPrepare_variablesRequired(t *testing.T) {
build := testBuild()
build.variables["foo"] = coreBuildVariable{Required: true}
warn, err := build.Prepare(map[string]string{})
if len(warn) > 0 {
t.Fatalf("bad: %#v", warn)
}
if err == nil {
t.Fatal("should have had error")
}
// Test with setting the value
build = testBuild()
build.variables["foo"] = coreBuildVariable{Required: true}
warn, err = build.Prepare(map[string]string{"foo": ""})
if len(warn) > 0 {
t.Fatalf("bad: %#v", warn)
}
if err != nil {
t.Fatalf("should not have error: %s", err)
}
}
func TestBuild_Run(t *testing.T) {
cache := &TestCache{}
ui := testUi()
build := testBuild()
build.Prepare(nil)
build.Prepare()
artifacts, err := build.Run(ui, cache)
if err != nil {
t.Fatalf("err: %s", err)
@ -287,7 +223,7 @@ func TestBuild_Run_Artifacts(t *testing.T) {
build := testBuild()
build.postProcessors = [][]coreBuildPostProcessor{}
build.Prepare(nil)
build.Prepare()
artifacts, err := build.Run(ui, cache)
if err != nil {
t.Fatalf("err: %s", err)
@ -312,7 +248,7 @@ func TestBuild_Run_Artifacts(t *testing.T) {
},
}
build.Prepare(nil)
build.Prepare()
artifacts, err = build.Run(ui, cache)
if err != nil {
t.Fatalf("err: %s", err)
@ -340,7 +276,7 @@ func TestBuild_Run_Artifacts(t *testing.T) {
},
}
build.Prepare(nil)
build.Prepare()
artifacts, err = build.Run(ui, cache)
if err != nil {
t.Fatalf("err: %s", err)
@ -370,7 +306,7 @@ func TestBuild_Run_Artifacts(t *testing.T) {
},
}
build.Prepare(nil)
build.Prepare()
artifacts, err = build.Run(ui, cache)
if err != nil {
t.Fatalf("err: %s", err)
@ -397,7 +333,7 @@ func TestBuild_Run_Artifacts(t *testing.T) {
},
}
build.Prepare(nil)
build.Prepare()
artifacts, err = build.Run(ui, cache)
if err != nil {
t.Fatalf("err: %s", err)

46
packer/template.go
View File

@ -75,8 +75,10 @@ type RawProvisionerConfig struct {
// RawVariable represents a variable configuration within a template.
type RawVariable struct {
Default string
Required bool
Default string // The default value for this variable
Required bool // If the variable is required or not
Value string // The set value for this variable
HasValue bool // True if the value was set
}
// ParseTemplate takes a byte slice and parses a Template from it, returning
@ -84,7 +86,9 @@ type RawVariable struct {
// could potentially be a MultiError, representing multiple errors. Knowing
// and checking for this can be useful, if you wish to format it in a certain
// way.
func ParseTemplate(data []byte) (t *Template, err error) {
//
// The second parameter, vars, are the values for a set of user variables.
func ParseTemplate(data []byte, vars map[string]string) (t *Template, err error) {
var rawTplInterface interface{}
err = jsonutil.Unmarshal(data, &rawTplInterface)
if err != nil {
@ -152,6 +156,13 @@ func ParseTemplate(data []byte) (t *Template, err error) {
continue
}
// Set the value of this variable if we have it
if val, ok := vars[k]; ok {
variable.HasValue = true
variable.Value = val
delete(vars, k)
}
t.Variables[k] = variable
}
@ -313,6 +324,11 @@ func ParseTemplate(data []byte) (t *Template, err error) {
errors = append(errors, fmt.Errorf("No builders are defined in the template."))
}
// Verify that all the variable sets were for real variables.
for k, _ := range vars {
errors = append(errors, fmt.Errorf("Unknown user variables: %s", k))
}
// If there were errors, we put it into a MultiError and return
if len(errors) > 0 {
err = &MultiError{errors}
@ -325,7 +341,7 @@ func ParseTemplate(data []byte) (t *Template, err error) {
// ParseTemplateFile takes the given template file and parses it into
// a single template.
func ParseTemplateFile(path string) (*Template, error) {
func ParseTemplateFile(path string, vars map[string]string) (*Template, error) {
var data []byte
if path == "-" {
@ -345,7 +361,7 @@ func ParseTemplateFile(path string) (*Template, error) {
}
}
return ParseTemplate(data)
return ParseTemplate(data, vars)
}
func parsePostProcessor(i int, rawV interface{}) (result []map[string]interface{}, errors []error) {
@ -527,12 +543,24 @@ func (t *Template) Build(name string, components *ComponentFinder) (b Build, err
}
// Prepare the variables
variables := make(map[string]coreBuildVariable)
var varErrors []error
variables := make(map[string]string)
for k, v := range t.Variables {
variables[k] = coreBuildVariable{
Default: v.Default,
Required: v.Required,
if v.Required && !v.HasValue {
varErrors = append(varErrors,
fmt.Errorf("Required user variable '%s' not set", k))
}
var val string = v.Default
if v.HasValue {
val = v.Value
}
variables[k] = val
}
if len(varErrors) > 0 {
return nil, &MultiError{varErrors}
}
b = &coreBuild{

178
packer/template_test.go
View File

@ -50,7 +50,7 @@ func TestParseTemplateFile_basic(t *testing.T) {
tf.Write([]byte(data))
tf.Close()
result, err := ParseTemplateFile(tf.Name())
result, err := ParseTemplateFile(tf.Name(), nil)
if err != nil {
t.Fatalf("err: %s", err)
}
@ -83,7 +83,7 @@ func TestParseTemplateFile_stdin(t *testing.T) {
defer func() { os.Stdin = oldStdin }()
os.Stdin = tf
result, err := ParseTemplateFile("-")
result, err := ParseTemplateFile("-", nil)
if err != nil {
t.Fatalf("err: %s", err)
}
@ -100,7 +100,7 @@ func TestParseTemplate_Basic(t *testing.T) {
}
`
result, err := ParseTemplate([]byte(data))
result, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatalf("err: %s", err)
}
@ -120,7 +120,7 @@ func TestParseTemplate_Description(t *testing.T) {
}
`
result, err := ParseTemplate([]byte(data))
result, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatalf("err: %s", err)
}
@ -141,7 +141,7 @@ func TestParseTemplate_Invalid(t *testing.T) {
}
`
result, err := ParseTemplate([]byte(data))
result, err := ParseTemplate([]byte(data), nil)
if err == nil {
t.Fatal("shold have error")
}
@ -160,7 +160,7 @@ func TestParseTemplate_InvalidKeys(t *testing.T) {
}
`
result, err := ParseTemplate([]byte(data))
result, err := ParseTemplate([]byte(data), nil)
if err == nil {
t.Fatal("should have error")
}
@ -176,7 +176,7 @@ func TestParseTemplate_BuilderWithoutType(t *testing.T) {
}
`
_, err := ParseTemplate([]byte(data))
_, err := ParseTemplate([]byte(data), nil)
if err == nil {
t.Fatal("should have error")
}
@ -191,7 +191,7 @@ func TestParseTemplate_BuilderWithNonStringType(t *testing.T) {
}
`
_, err := ParseTemplate([]byte(data))
_, err := ParseTemplate([]byte(data), nil)
if err == nil {
t.Fatal("should have error")
}
@ -208,7 +208,7 @@ func TestParseTemplate_BuilderWithoutName(t *testing.T) {
}
`
result, err := ParseTemplate([]byte(data))
result, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatalf("err: %s", err)
}
@ -240,7 +240,7 @@ func TestParseTemplate_BuilderWithName(t *testing.T) {
}
`
result, err := ParseTemplate([]byte(data))
result, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatalf("err: %s", err)
}
@ -289,7 +289,7 @@ func TestParseTemplate_BuilderWithConflictingName(t *testing.T) {
}
`
_, err := ParseTemplate([]byte(data))
_, err := ParseTemplate([]byte(data), nil)
if err == nil {
t.Fatal("should have error")
}
@ -307,7 +307,7 @@ func TestParseTemplate_Hooks(t *testing.T) {
}
`
result, err := ParseTemplate([]byte(data))
result, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatalf("err: %s", err)
}
@ -342,7 +342,7 @@ func TestParseTemplate_PostProcessors(t *testing.T) {
}
`
tpl, err := ParseTemplate([]byte(data))
tpl, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatalf("error parsing: %s", err)
}
@ -392,7 +392,7 @@ func TestParseTemplate_ProvisionerWithoutType(t *testing.T) {
}
`
_, err := ParseTemplate([]byte(data))
_, err := ParseTemplate([]byte(data), nil)
if err == nil {
t.Fatal("err should not be nil")
}
@ -409,7 +409,7 @@ func TestParseTemplate_ProvisionerWithNonStringType(t *testing.T) {
}
`
_, err := ParseTemplate([]byte(data))
_, err := ParseTemplate([]byte(data), nil)
if err == nil {
t.Fatal("should have error")
}
@ -428,7 +428,7 @@ func TestParseTemplate_Provisioners(t *testing.T) {
}
`
result, err := ParseTemplate([]byte(data))
result, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatal("err: %s", err)
}
@ -460,7 +460,7 @@ func TestParseTemplate_ProvisionerPauseBefore(t *testing.T) {
}
`
result, err := ParseTemplate([]byte(data))
result, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatal("err: %s", err)
}
@ -491,7 +491,9 @@ func TestParseTemplate_Variables(t *testing.T) {
}
`
result, err := ParseTemplate([]byte(data))
result, err := ParseTemplate([]byte(data), map[string]string{
"bar": "bar",
})
if err != nil {
t.Fatalf("err: %s", err)
}
@ -503,18 +505,25 @@ func TestParseTemplate_Variables(t *testing.T) {
if result.Variables["foo"].Default != "bar" {
t.Fatal("foo default is not right")
}
if result.Variables["foo"].Required {
t.Fatal("foo should not be required")
}
if result.Variables["foo"].HasValue {
t.Fatal("foo should not have value")
}
if result.Variables["bar"].Default != "" {
t.Fatal("default should be empty")
}
if !result.Variables["bar"].Required {
t.Fatal("bar should be required")
}
if !result.Variables["bar"].HasValue {
t.Fatal("bar should have value")
}
if result.Variables["bar"].Value != "bar" {
t.Fatal("bad value")
}
if result.Variables["baz"].Default != "27" {
t.Fatal("default should be empty")
@ -525,6 +534,61 @@ func TestParseTemplate_Variables(t *testing.T) {
}
}
func TestParseTemplate_variablesSet(t *testing.T) {
data := `
{
"variables": {
"foo": "bar"
},
"builders": [
{
"name": "test1",
"type": "test-builder"
}
]
}
`
template, err := ParseTemplate([]byte(data), map[string]string{
"foo": "value",
})
if err != nil {
t.Fatalf("err: %s", err)
}
if len(template.Variables) != 1 {
t.Fatalf("bad vars: %#v", template.Variables)
}
if template.Variables["foo"].Value != "value" {
t.Fatalf("bad: %#v", template.Variables["foo"])
}
}
func TestParseTemplate_variablesSetUnknown(t *testing.T) {
data := `
{
"variables": {
"foo": "bar"
},
"builders": [
{
"name": "test1",
"type": "test-builder"
}
]
}
`
_, err := ParseTemplate([]byte(data), map[string]string{
"what": "value",
})
if err == nil {
t.Fatal("should error")
}
}
func TestParseTemplate_variablesBadDefault(t *testing.T) {
data := `
{
@ -536,7 +600,7 @@ func TestParseTemplate_variablesBadDefault(t *testing.T) {
}
`
_, err := ParseTemplate([]byte(data))
_, err := ParseTemplate([]byte(data), nil)
if err == nil {
t.Fatal("should have error")
}
@ -558,7 +622,7 @@ func TestTemplate_BuildNames(t *testing.T) {
}
`
result, err := ParseTemplate([]byte(data))
result, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatalf("err: %s", err)
}
@ -582,7 +646,7 @@ func TestTemplate_BuildUnknown(t *testing.T) {
}
`
template, err := ParseTemplate([]byte(data))
template, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatalf("bad: %s", err)
}
@ -608,7 +672,7 @@ func TestTemplate_BuildUnknownBuilder(t *testing.T) {
}
`
template, err := ParseTemplate([]byte(data))
template, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatalf("err: %s", err)
}
@ -642,7 +706,7 @@ func TestTemplate_Build_NilBuilderFunc(t *testing.T) {
}
`
template, err := ParseTemplate([]byte(data))
template, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatalf("err: %s", err)
}
@ -679,7 +743,7 @@ func TestTemplate_Build_NilProvisionerFunc(t *testing.T) {
}
`
template, err := ParseTemplate([]byte(data))
template, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatalf("err: %s", err)
}
@ -714,7 +778,7 @@ func TestTemplate_Build_NilProvisionerFunc_WithNoProvisioners(t *testing.T) {
}
`
template, err := ParseTemplate([]byte(data))
template, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatalf("err: %s", err)
}
@ -754,7 +818,7 @@ func TestTemplate_Build(t *testing.T) {
"type": "test-builder",
}
template, err := ParseTemplate([]byte(data))
template, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatalf("err: %s", err)
}
@ -851,7 +915,7 @@ func TestTemplateBuild_exceptOnlyPP(t *testing.T) {
}
`
_, err := ParseTemplate([]byte(data))
_, err := ParseTemplate([]byte(data), nil)
if err == nil {
t.Fatal("should have error")
}
@ -881,7 +945,7 @@ func TestTemplateBuild_exceptOnlyProv(t *testing.T) {
}
`
_, err := ParseTemplate([]byte(data))
_, err := ParseTemplate([]byte(data), nil)
if err == nil {
t.Fatal("should have error")
}
@ -910,7 +974,7 @@ func TestTemplateBuild_exceptPPInvalid(t *testing.T) {
}
`
_, err := ParseTemplate([]byte(data))
_, err := ParseTemplate([]byte(data), nil)
if err == nil {
t.Fatal("should have error")
}
@ -939,7 +1003,7 @@ func TestTemplateBuild_exceptPP(t *testing.T) {
}
`
template, err := ParseTemplate([]byte(data))
template, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatalf("err: %s", err)
}
@ -990,7 +1054,7 @@ func TestTemplateBuild_exceptProvInvalid(t *testing.T) {
}
`
_, err := ParseTemplate([]byte(data))
_, err := ParseTemplate([]byte(data), nil)
if err == nil {
t.Fatal("should have error")
}
@ -1019,7 +1083,7 @@ func TestTemplateBuild_exceptProv(t *testing.T) {
}
`
template, err := ParseTemplate([]byte(data))
template, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatalf("err: %s", err)
}
@ -1070,7 +1134,7 @@ func TestTemplateBuild_onlyPPInvalid(t *testing.T) {
}
`
_, err := ParseTemplate([]byte(data))
_, err := ParseTemplate([]byte(data), nil)
if err == nil {
t.Fatal("should have error")
}
@ -1099,7 +1163,7 @@ func TestTemplateBuild_onlyPP(t *testing.T) {
}
`
template, err := ParseTemplate([]byte(data))
template, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatalf("err: %s", err)
}
@ -1150,7 +1214,7 @@ func TestTemplateBuild_onlyProvInvalid(t *testing.T) {
}
`
_, err := ParseTemplate([]byte(data))
_, err := ParseTemplate([]byte(data), nil)
if err == nil {
t.Fatal("should have error")
}
@ -1179,7 +1243,7 @@ func TestTemplateBuild_onlyProv(t *testing.T) {
}
`
template, err := ParseTemplate([]byte(data))
template, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatalf("err: %s", err)
}
@ -1229,7 +1293,7 @@ func TestTemplate_Build_ProvisionerOverride(t *testing.T) {
}
`
template, err := ParseTemplate([]byte(data))
template, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatalf("err: %s", err)
}
@ -1305,7 +1369,7 @@ func TestTemplate_Build_ProvisionerOverrideBad(t *testing.T) {
}
`
_, err := ParseTemplate([]byte(data))
_, err := ParseTemplate([]byte(data), nil)
if err == nil {
t.Fatal("should have error")
}
@ -1330,7 +1394,7 @@ func TestTemplateBuild_ProvisionerPauseBefore(t *testing.T) {
}
`
template, err := ParseTemplate([]byte(data))
template, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatalf("err: %s", err)
}
@ -1391,7 +1455,7 @@ func TestTemplateBuild_variables(t *testing.T) {
}
`
template, err := ParseTemplate([]byte(data))
template, err := ParseTemplate([]byte(data), nil)
if err != nil {
t.Fatalf("err: %s", err)
}
@ -1406,7 +1470,35 @@ func TestTemplateBuild_variables(t *testing.T) {
t.Fatalf("couldn't convert!")
}
if len(coreBuild.variables) != 1 {
expected := map[string]string{"foo": "bar"}
if !reflect.DeepEqual(coreBuild.variables, expected) {
t.Fatalf("bad vars: %#v", coreBuild.variables)
}
}
func TestTemplateBuild_variablesRequiredNotSet(t *testing.T) {
data := `
{
"variables": {
"foo": null
},
"builders": [
{
"name": "test1",
"type": "test-builder"
}
]
}
`
template, err := ParseTemplate([]byte(data), map[string]string{})
if err != nil {
t.Fatalf("err: %s", err)
}
_, err = template.Build("test1", testComponentFinder())
if err == nil {
t.Fatal("should error")
}
}