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faet:
prepare and cleanup release event hooks
Resolves #295 Resolves #330 Resolves #329 (Supports templating of only `releases[].hooks[].command` and `args` right now Resolevs #324
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,103 @@ | ||
| package state | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "github.com/roboll/helmfile/environment" | ||
| "github.com/roboll/helmfile/helmexec" | ||
| "github.com/roboll/helmfile/tmpl" | ||
| ) | ||
|
|
||
| const ( | ||
| ReleaseEventHookPrepare = "prepare" | ||
| ReleaseEventHookCleanup = "cleanup" | ||
| ) | ||
|
|
||
| type ReleaseEventHookSpec struct { | ||
| Name string `yaml:"name"` | ||
| Events []string `yaml:"events"` | ||
| Command []string `yaml:"command"` | ||
| Args []string `yaml:"args""` | ||
| } | ||
|
|
||
| type ReleaseEventHookTemplateData struct { | ||
| Release *ReleaseSpec | ||
| HelmfileCommand string | ||
| // Environment is accessible as `.Environment` from any template executed by the renderer | ||
| Environment environment.Environment | ||
| // Namespace is accessible as `.Namespace` from any non-values template executed by the renderer | ||
| Namespace string | ||
| Event Event | ||
| } | ||
|
|
||
| type Event struct { | ||
| Name string | ||
| } | ||
|
|
||
| func (state *HelmState) triggerPrepareEvent(r *ReleaseSpec, helmfileCommand string) (bool, error) { | ||
| return state.triggerEvent(r, helmfileCommand, ReleaseEventHookPrepare) | ||
| } | ||
|
|
||
| func (state *HelmState) triggerCleanupEvent(r *ReleaseSpec, helmfileCommand string) (bool, error) { | ||
| return state.triggerEvent(r, helmfileCommand, ReleaseEventHookCleanup) | ||
| } | ||
|
|
||
| func (state *HelmState) triggerEvent(r *ReleaseSpec, helmfileCommand string, event string) (bool, error) { | ||
| if state.runner == nil { | ||
| state.runner = helmexec.ShellRunner{} | ||
| } | ||
|
|
||
| for _, hook := range r.Hooks { | ||
| contained := false | ||
| for _, e := range hook.Events { | ||
| contained = contained || e == event | ||
| } | ||
| if !contained { | ||
| continue | ||
| } | ||
|
|
||
| var err error | ||
|
|
||
| name := hook.Name | ||
| if name == "" { | ||
| name = hook.Command[0] | ||
| } | ||
|
|
||
| render := tmpl.NewTextRenderer(state.readFile, state.basePath, ReleaseEventHookTemplateData{ | ||
| Release: r, | ||
| HelmfileCommand: helmfileCommand, | ||
| Environment: state.Env, | ||
| Namespace: state.Namespace, | ||
| Event: Event{ | ||
| Name: event, | ||
| }, | ||
| }) | ||
|
|
||
| state.logger.Debugf("hook[%s]: triggered by event \"%s\"\n", name, event) | ||
|
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||
| command := make([]string, len(hook.Command)) | ||
| args := make([]string, len(hook.Args)) | ||
| for i, raw := range hook.Command { | ||
| command[i], err = render.RenderTemplateText(raw) | ||
| if err != nil { | ||
| return false, fmt.Errorf("hook[%s]: %v", name, err) | ||
| } | ||
| } | ||
| for i, raw := range hook.Args { | ||
| args[i], err = render.RenderTemplateText(raw) | ||
| if err != nil { | ||
| return false, fmt.Errorf("hook[%s]: %v", name, err) | ||
| } | ||
| } | ||
|
|
||
| allargs := []string{} | ||
| allargs = append(allargs, command[1:]...) | ||
| allargs = append(allargs, args...) | ||
| bytes, err := state.runner.Execute(command[0], allargs) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
| state.logger.Debugf("hook[%s]: %s\n", name, string(bytes)) | ||
| } | ||
|
|
||
| return true, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| package tmpl | ||
|
|
||
| import ( | ||
| "bytes" | ||
| ) | ||
|
|
||
| type templateTextRenderer struct { | ||
| ReadText func(string) ([]byte, error) | ||
| Context *Context | ||
| Data interface{} | ||
| } | ||
|
|
||
| type TextRenderer interface { | ||
| RenderTemplateTextToBuffer(text string) (*bytes.Buffer, error) | ||
| } | ||
|
|
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| func NewTextRenderer(readFile func(filename string) ([]byte, error), basePath string, data interface{}) *templateTextRenderer { | ||
| return &templateTextRenderer{ | ||
| ReadText: readFile, | ||
| Context: &Context{ | ||
| basePath: basePath, | ||
| readFile: readFile, | ||
| }, | ||
| Data: data, | ||
| } | ||
| } | ||
|
|
||
| func (r *templateTextRenderer) RenderTemplateText(text string) (string, error) { | ||
| buf, err := r.Context.RenderTemplateToBuffer(text, r.Data) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| return buf.String(), nil | ||
| } |