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Ivan Shvedunov
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| /* | ||
| Copyright 2018 Mirantis | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package utils | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "log" | ||
| "text/template" | ||
|
|
||
| "github.com/kballard/go-shellquote" | ||
| ) | ||
|
|
||
| // ShellTemplate denotes a simple template used to generate shell | ||
| // commands. It adds 'shellquote' function to go-template that can be | ||
| // used to quote string values for the shell. | ||
| type ShellTemplate struct { | ||
| *template.Template | ||
| } | ||
|
|
||
| // NewShellTemplate returns a new shell template using the specified | ||
| // text. It panics if the template doesn't compile. | ||
| func NewShellTemplate(text string) *ShellTemplate { | ||
| funcs := map[string]interface{}{ | ||
| "shq": func(text string) string { | ||
| return shellquote.Join(text) | ||
| }, | ||
| } | ||
| return &ShellTemplate{ | ||
| template.Must(template.New("script").Funcs(funcs).Parse(text)), | ||
| } | ||
| } | ||
|
|
||
| // ExecuteToString executes the template using the specified data and | ||
| // returns the result as a string. | ||
| func (t *ShellTemplate) ExecuteToString(data interface{}) (string, error) { | ||
| var buf bytes.Buffer | ||
| err := t.Template.Execute(&buf, data) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| return buf.String(), nil | ||
| } | ||
|
|
||
| // MustExecuteToString executes the template using the specified data | ||
| // and returns the result as a string. It panics upon an error | ||
| func (t *ShellTemplate) MustExecuteToString(data interface{}) string { | ||
| r, err := t.ExecuteToString(data) | ||
| if err != nil { | ||
| log.Panicf("Error executing template: %v", err) | ||
| } | ||
| return r | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| /* | ||
| Copyright 2018 Mirantis | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package utils | ||
|
|
||
| import "testing" | ||
|
|
||
| func TestNewShellTemplate(t *testing.T) { | ||
| tmpl := NewShellTemplate("mount {{ shq .Foobar }} {{ .Baz }}") | ||
| out, err := tmpl.ExecuteToString(map[string]string{ | ||
| "Foobar": "abc def", | ||
| "Baz": "qqq", | ||
| }) | ||
| if err != nil { | ||
| t.Fatalf("Execute: %v", err) | ||
| } | ||
| expectedText := "mount 'abc def' qqq" | ||
| if out != expectedText { | ||
| t.Errorf("Bad template result. Expected:\n%s\nGot:\n%s", expectedText, out) | ||
| } | ||
| } |