config: use a YAML transform to normalize keys
This removes the problematic two-pass unmarshalling.
This commit is contained in:
Alex Crawford
parent
4ed1d03c97
commit
248536a5cd
@ -63,15 +63,12 @@ func IsCloudConfig(userdata string) bool {
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// string of YAML), returning any error encountered. It will ignore unknown
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// fields but log encountering them.
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func NewCloudConfig(contents string) (*CloudConfig, error) {
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yaml.UnmarshalMappingKeyTransform = func(nameIn string) (nameOut string) {
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return strings.Replace(nameIn, "-", "_", -1)
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}
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var cfg CloudConfig
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ncontents, err := normalizeConfig(contents)
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if err != nil {
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err := yaml.Unmarshal([]byte(contents), &cfg)
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return &cfg, err
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}
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if err = yaml.Unmarshal(ncontents, &cfg); err != nil {
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return &cfg, err
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}
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return &cfg, nil
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}
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func (cc CloudConfig) String() string {
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@ -159,31 +156,3 @@ func isZero(v reflect.Value) bool {
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func isFieldExported(f reflect.StructField) bool {
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return f.PkgPath == ""
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}
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func normalizeConfig(config string) ([]byte, error) {
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var cfg map[interface{}]interface{}
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if err := yaml.Unmarshal([]byte(config), &cfg); err != nil {
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return nil, err
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}
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return yaml.Marshal(normalizeKeys(cfg))
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}
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func normalizeKeys(m map[interface{}]interface{}) map[interface{}]interface{} {
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for k, v := range m {
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if m, ok := m[k].(map[interface{}]interface{}); ok {
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normalizeKeys(m)
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}
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if s, ok := m[k].([]interface{}); ok {
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for _, e := range s {
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if m, ok := e.(map[interface{}]interface{}); ok {
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normalizeKeys(m)
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}
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}
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}
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delete(m, k)
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m[strings.Replace(fmt.Sprint(k), "-", "_", -1)] = v
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}
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return m
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}
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@ -22,6 +22,42 @@ import (
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"testing"
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)
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func TestNewCloudConfig(t *testing.T) {
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tests := []struct {
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contents string
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config CloudConfig
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}{
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{},
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{
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contents: "#cloud-config\nwrite_files:\n - path: underscore",
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config: CloudConfig{WriteFiles: []File{File{Path: "underscore"}}},
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},
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{
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contents: "#cloud-config\nwrite-files:\n - path: hyphen",
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config: CloudConfig{WriteFiles: []File{File{Path: "hyphen"}}},
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},
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{
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contents: "#cloud-config\ncoreos:\n update:\n reboot-strategy: off",
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config: CloudConfig{CoreOS: CoreOS{Update: Update{RebootStrategy: "off"}}},
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},
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{
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contents: "#cloud-config\ncoreos:\n update:\n reboot-strategy: false",
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config: CloudConfig{CoreOS: CoreOS{Update: Update{RebootStrategy: "false"}}},
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},
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}
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for i, tt := range tests {
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config, err := NewCloudConfig(tt.contents)
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if err != nil {
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t.Errorf("bad error (test case #%d): want %v, got %s", i, nil, err)
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}
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if !reflect.DeepEqual(&tt.config, config) {
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t.Errorf("bad config (test case #%d): want %#v, got %#v", i, tt.config, config)
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}
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}
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}
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func TestIsZero(t *testing.T) {
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tests := []struct {
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c interface{}
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@ -251,40 +287,6 @@ Address=10.209.171.177/19
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if cfg.CoreOS.Update.RebootStrategy != "reboot" {
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t.Errorf("Failed to parse locksmith strategy")
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}
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contents = `
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coreos:
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write_files:
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- path: /home/me/notes
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permissions: 0744
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`
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cfg, err = NewCloudConfig(contents)
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if err != nil {
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t.Fatalf("Encountered unexpected error :%v", err)
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}
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if len(cfg.WriteFiles) != 1 {
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t.Error("Failed to parse correct number of write_files")
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} else {
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wf := cfg.WriteFiles[0]
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if wf.Content != "" {
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t.Errorf("WriteFile has incorrect contents '%s'", wf.Content)
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}
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if wf.Encoding != "" {
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t.Errorf("WriteFile has incorrect encoding %s", wf.Encoding)
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}
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// Verify that the normalization of the config converted 0744 to its decimal
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// representation, 484.
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if wf.RawFilePermissions != "484" {
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t.Errorf("WriteFile has incorrect permissions %s", wf.RawFilePermissions)
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}
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if wf.Path != "/home/me/notes" {
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t.Errorf("WriteFile has incorrect path %s", wf.Path)
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}
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if wf.Owner != "" {
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t.Errorf("WriteFile has incorrect owner %s", wf.Owner)
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}
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}
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}
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// Assert that our interface conversion doesn't panic
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@ -451,31 +453,3 @@ users:
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t.Errorf("ssh import url is %q, expected 'https://token:x-auth-token@github.enterprise.com/api/v3/polvi/keys'", user.SSHImportURL)
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}
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}
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func TestNormalizeKeys(t *testing.T) {
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for _, tt := range []struct {
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in string
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out string
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}{
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{"my_key_name: the-value\n", "my_key_name: the-value\n"},
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{"my-key_name: the-value\n", "my_key_name: the-value\n"},
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{"my-key-name: the-value\n", "my_key_name: the-value\n"},
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{"a:\n- key_name: the-value\n", "a:\n- key_name: the-value\n"},
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{"a:\n- key-name: the-value\n", "a:\n- key_name: the-value\n"},
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{"a:\n b:\n - key_name: the-value\n", "a:\n b:\n - key_name: the-value\n"},
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{"a:\n b:\n - key-name: the-value\n", "a:\n b:\n - key_name: the-value\n"},
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{"coreos:\n update:\n reboot-strategy: off\n", "coreos:\n update:\n reboot_strategy: false\n"},
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{"coreos:\n update:\n reboot-strategy: 'off'\n", "coreos:\n update:\n reboot_strategy: \"off\"\n"},
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} {
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out, err := normalizeConfig(tt.in)
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if err != nil {
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t.Fatalf("bad error (%q): want nil, got %s", tt.in, err)
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}
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if string(out) != tt.out {
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t.Fatalf("bad normalization (%q): want %q, got %q", tt.in, tt.out, out)
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}
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}
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}
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