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feat: add support for labels in func.yaml and
func config
This change adds support for setting labels on deployed functions. It uses the interactive CLI prompt introduced by Zbynek to add, remove and list labels applied on a deployed function. Signed-off-by: Lance Ball <lball@redhat.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,290 @@ | ||
| package cmd | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "os" | ||
|
|
||
| "github.com/AlecAivazis/survey/v2" | ||
| "github.com/AlecAivazis/survey/v2/terminal" | ||
| "github.com/spf13/cobra" | ||
|
|
||
| fn "knative.dev/kn-plugin-func" | ||
| "knative.dev/kn-plugin-func/utils" | ||
| ) | ||
|
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| func init() { | ||
| configCmd.AddCommand(configLabelsCmd) | ||
| configLabelsCmd.Flags().StringP("path", "p", cwd(), "Path to the project directory (Env: $FUNC_PATH)") | ||
| configLabelsCmd.AddCommand(configLabelsAddCmd) | ||
| configLabelsAddCmd.Flags().StringP("path", "p", cwd(), "Path to the project directory (Env: $FUNC_PATH)") | ||
| configLabelsCmd.AddCommand(configLabelsRemoveCmd) | ||
| configLabelsRemoveCmd.Flags().StringP("path", "p", cwd(), "Path to the project directory (Env: $FUNC_PATH)") | ||
| } | ||
|
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| var configLabelsCmd = &cobra.Command{ | ||
| Use: "labels", | ||
| Short: "List and manage configured labels for a function", | ||
| Long: `List and manage configured labels for a function | ||
| Prints configured labels for a function project present in | ||
| the current directory or from the directory specified with --path. | ||
| `, | ||
| SuggestFor: []string{"albels", "abels", "label"}, | ||
| PreRunE: bindEnv("path"), | ||
| RunE: func(cmd *cobra.Command, args []string) (err error) { | ||
| function, err := initConfigCommand(args) | ||
| if err != nil { | ||
| return | ||
| } | ||
|
|
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| listLabels(function) | ||
|
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| return | ||
| }, | ||
| } | ||
|
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| var configLabelsAddCmd = &cobra.Command{ | ||
| Use: "add", | ||
| Short: "Add labels to the function configuration", | ||
| Long: `Add labels to the function configuration | ||
| Interactive prompt to add labels to the function project in the current | ||
| directory or from the directory specified with --path. | ||
| The label can be set directly from a value or from an environment variable on | ||
| the local machine. | ||
| `, | ||
| SuggestFor: []string{"ad", "create", "insert", "append"}, | ||
| PreRunE: bindEnv("path"), | ||
| RunE: func(cmd *cobra.Command, args []string) (err error) { | ||
| function, err := initConfigCommand(args) | ||
| if err != nil { | ||
| return | ||
| } | ||
|
|
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| return runAddLabelsPrompt(cmd.Context(), function) | ||
| }, | ||
| } | ||
|
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| var configLabelsRemoveCmd = &cobra.Command{ | ||
| Use: "remove", | ||
| Short: "Remove labels from the function configuration", | ||
| Long: `Remove labels from the function configuration | ||
| Interactive prompt to remove labels from the function project in the current | ||
| directory or from the directory specified with --path. | ||
| `, | ||
| SuggestFor: []string{"del", "delete", "rmeove"}, | ||
| PreRunE: bindEnv("path"), | ||
| RunE: func(cmd *cobra.Command, args []string) (err error) { | ||
| function, err := initConfigCommand(args) | ||
| if err != nil { | ||
| return | ||
| } | ||
|
|
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| return runRemoveLabelsPrompt(function) | ||
| }, | ||
| } | ||
|
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| func listLabels(f fn.Function) { | ||
| if len(f.Labels) == 0 { | ||
| fmt.Println("There aren't any configured labels") | ||
| return | ||
| } | ||
|
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| fmt.Println("Configured labels:") | ||
| for _, e := range f.Labels { | ||
| fmt.Println(" - ", e.String()) | ||
| } | ||
| } | ||
|
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| func runAddLabelsPrompt(ctx context.Context, f fn.Function) (err error) { | ||
|
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| insertToIndex := 0 | ||
|
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| // SECTION - if there are some labels already set, choose the position of the new entry | ||
| if len(f.Labels) > 0 { | ||
| options := []string{} | ||
| for _, e := range f.Labels { | ||
| options = append(options, fmt.Sprintf("Insert before: %s", e.String())) | ||
| } | ||
| options = append(options, "Insert here.") | ||
|
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| selectedLabel := "" | ||
| prompt := &survey.Select{ | ||
| Message: "Where do you want to add the label?", | ||
| Options: options, | ||
| Default: options[len(options)-1], | ||
| } | ||
| err = survey.AskOne(prompt, &selectedLabel) | ||
| if err != nil { | ||
| if err == terminal.InterruptErr { | ||
| return nil | ||
| } | ||
| return | ||
| } | ||
|
|
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| for i, option := range options { | ||
| if option == selectedLabel { | ||
| insertToIndex = i | ||
| break | ||
| } | ||
| } | ||
| } | ||
|
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| // SECTION - select the type of label to be added | ||
| selectedOption := "" | ||
| const ( | ||
| optionLabelValue = "Label with a specified value" | ||
| optionLabelLocal = "Value from a local environment variable" | ||
| ) | ||
| options := []string{optionLabelValue, optionLabelLocal} | ||
|
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||
| err = survey.AskOne(&survey.Select{ | ||
| Message: "What type of label do you want to add?", | ||
| Options: options, | ||
| }, &selectedOption) | ||
| if err != nil { | ||
| if err == terminal.InterruptErr { | ||
| return nil | ||
| } | ||
| return | ||
| } | ||
|
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| newPair := fn.Pair{} | ||
|
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| switch selectedOption { | ||
| // SECTION - add new label with the specified value | ||
| case optionLabelValue: | ||
| qs := []*survey.Question{ | ||
| { | ||
| Name: "name", | ||
| Prompt: &survey.Input{Message: "Please specify the label name:"}, | ||
| Validate: func(val interface{}) error { | ||
| return utils.ValidateLabelName(val.(string)) | ||
| }, | ||
| }, | ||
| { | ||
| Name: "value", | ||
| Prompt: &survey.Input{Message: "Please specify the label value:"}, | ||
| Validate: func(val interface{}) error { | ||
| return utils.ValidateLabelValue(val.(string)) | ||
| }}, | ||
| } | ||
| answers := struct { | ||
| Name string | ||
| Value string | ||
| }{} | ||
|
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| err = survey.Ask(qs, &answers) | ||
| if err != nil { | ||
| if err == terminal.InterruptErr { | ||
| return nil | ||
| } | ||
| return | ||
| } | ||
|
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| newPair.Name = &answers.Name | ||
| newPair.Value = &answers.Value | ||
|
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| // SECTION - add new label with value from a local environment variable | ||
| case optionLabelLocal: | ||
| qs := []*survey.Question{ | ||
| { | ||
| Name: "name", | ||
| Prompt: &survey.Input{Message: "Please specify the label name:"}, | ||
| Validate: func(val interface{}) error { | ||
| return utils.ValidateLabelName(val.(string)) | ||
| }, | ||
| }, | ||
| { | ||
| Name: "value", | ||
| Prompt: &survey.Input{Message: "Please specify the local environment variable:"}, | ||
| Validate: func(val interface{}) error { | ||
| return utils.ValidateLabelValue(val.(string)) | ||
| }, | ||
| }, | ||
| } | ||
| answers := struct { | ||
| Name string | ||
| Value string | ||
| }{} | ||
|
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| err = survey.Ask(qs, &answers) | ||
| if err != nil { | ||
| if err == terminal.InterruptErr { | ||
| return nil | ||
| } | ||
| return | ||
| } | ||
|
|
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| if _, ok := os.LookupEnv(answers.Value); !ok { | ||
| fmt.Printf("Warning: specified local environment variable %q is not set\n", answers.Value) | ||
| } | ||
|
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| value := fmt.Sprintf("{{ env:%s }}", answers.Value) | ||
| newPair.Name = &answers.Name | ||
| newPair.Value = &value | ||
| } | ||
|
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| // we have all necessary information -> let's insert the label to the selected position in the list | ||
| if insertToIndex == len(f.Labels) { | ||
| f.Labels = append(f.Labels, newPair) | ||
| } else { | ||
| f.Labels = append(f.Labels[:insertToIndex+1], f.Labels[insertToIndex:]...) | ||
| f.Labels[insertToIndex] = newPair | ||
| } | ||
|
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| err = f.WriteConfig() | ||
| if err == nil { | ||
| fmt.Println("Label entry was added to the function configuration") | ||
| } | ||
|
|
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| return | ||
| } | ||
|
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| func runRemoveLabelsPrompt(f fn.Function) (err error) { | ||
| if len(f.Labels) == 0 { | ||
| fmt.Println("There aren't any configured labels") | ||
| return | ||
| } | ||
|
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| options := []string{} | ||
| for _, e := range f.Labels { | ||
| options = append(options, e.String()) | ||
| } | ||
|
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| selectedLabel := "" | ||
| prompt := &survey.Select{ | ||
| Message: "Which labels do you want to remove?", | ||
| Options: options, | ||
| } | ||
| err = survey.AskOne(prompt, &selectedLabel) | ||
| if err != nil { | ||
| if err == terminal.InterruptErr { | ||
| return nil | ||
| } | ||
| return | ||
| } | ||
|
|
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| var newLabels fn.Pairs | ||
| removed := false | ||
| for i, e := range f.Labels { | ||
| if e.String() == selectedLabel { | ||
| newLabels = append(f.Labels[:i], f.Labels[i+1:]...) | ||
| removed = true | ||
| break | ||
| } | ||
| } | ||
|
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| if removed { | ||
| f.Labels = newLabels | ||
| err = f.WriteConfig() | ||
| if err == nil { | ||
| fmt.Println("Label was removed from the function configuration") | ||
| } | ||
| } | ||
|
|
||
| return | ||
| } |
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