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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" | ||
) | ||
|
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type ReleaseEventHookSpec struct { | ||
Name string `yaml:"name"` | ||
Events []string `yaml:"events"` | ||
Command []string `yaml:"command"` | ||
Args []string `yaml:"args""` | ||
} | ||
|
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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 | ||
} | ||
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type Event struct { | ||
Name string | ||
} | ||
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func (state *HelmState) triggerPrepareEvent(r *ReleaseSpec, helmfileCommand string) (bool, error) { | ||
return state.triggerEvent(r, helmfileCommand, ReleaseEventHookPrepare) | ||
} | ||
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func (state *HelmState) triggerCleanupEvent(r *ReleaseSpec, helmfileCommand string) (bool, error) { | ||
return state.triggerEvent(r, helmfileCommand, ReleaseEventHookCleanup) | ||
} | ||
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func (state *HelmState) triggerEvent(r *ReleaseSpec, helmfileCommand string, event string) (bool, error) { | ||
if state.runner == nil { | ||
state.runner = helmexec.ShellRunner{} | ||
} | ||
|
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for _, hook := range r.Hooks { | ||
contained := false | ||
for _, e := range hook.Events { | ||
contained = contained || e == event | ||
} | ||
if !contained { | ||
continue | ||
} | ||
|
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var err error | ||
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name := hook.Name | ||
if name == "" { | ||
name = hook.Command[0] | ||
} | ||
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render := tmpl.NewTextRenderer(state.readFile, state.basePath, ReleaseEventHookTemplateData{ | ||
Release: r, | ||
HelmfileCommand: helmfileCommand, | ||
Environment: state.Env, | ||
Namespace: state.Namespace, | ||
Event: Event{ | ||
Name: event, | ||
}, | ||
}) | ||
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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) | ||
} | ||
} | ||
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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)) | ||
} | ||
|
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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" | ||
) | ||
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type templateTextRenderer struct { | ||
ReadText func(string) ([]byte, error) | ||
Context *Context | ||
Data interface{} | ||
} | ||
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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, | ||
} | ||
} | ||
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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 | ||
} |