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* Function for listing nodes in a flexible way, used by the registries and nodes listing commands. * Output flags for dumping these listings as YAML/JSON. Signed-off-by: Alvaro Saurin <[email protected]>
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| /* | ||
| Copyright © 2020 The k3d Author(s) | ||
| Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| of this software and associated documentation files (the "Software"), to deal | ||
| in the Software without restriction, including without limitation the rights | ||
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| copies of the Software, and to permit persons to whom the Software is | ||
| furnished to do so, subject to the following conditions: | ||
| The above copyright notice and this permission notice shall be included in | ||
| all copies or substantial portions of the Software. | ||
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| THE SOFTWARE. | ||
| */ | ||
| package util | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "os" | ||
| "sort" | ||
| "strings" | ||
|
|
||
| "github.com/liggitt/tabwriter" | ||
| k3d "github.com/rancher/k3d/v4/pkg/types" | ||
| log "github.com/sirupsen/logrus" | ||
| "gopkg.in/yaml.v2" | ||
| ) | ||
|
|
||
| type NodePrinter interface { | ||
| Print(*tabwriter.Writer, *k3d.Node) | ||
| } | ||
|
|
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| type NodePrinterFunc func(*tabwriter.Writer, *k3d.Node) | ||
|
|
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| func (npf NodePrinterFunc) Print(writter *tabwriter.Writer, node *k3d.Node) { | ||
| npf(writter, node) | ||
| } | ||
|
|
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| // PrintNodes prints a list of nodes, either as a table or as a JSON/YAML listing | ||
| func PrintNodes(nodes []*k3d.Node, outputFormat string, headers *[]string, nodePrinter NodePrinter) { | ||
| outputFormat = strings.ToLower(outputFormat) | ||
|
|
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| tabwriter := tabwriter.NewWriter(os.Stdout, 6, 4, 3, ' ', tabwriter.RememberWidths) | ||
| defer tabwriter.Flush() | ||
|
|
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| if outputFormat != "json" && outputFormat != "yaml" { | ||
| if headers != nil { | ||
| _, err := fmt.Fprintf(tabwriter, "%s\n", strings.Join(*headers, "\t")) | ||
| if err != nil { | ||
| log.Fatalln("Failed to print headers") | ||
| } | ||
| } | ||
| } | ||
|
|
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| sort.Slice(nodes, func(i, j int) bool { | ||
| return nodes[i].Name < nodes[j].Name | ||
| }) | ||
|
|
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| if outputFormat == "json" || outputFormat == "yaml" { | ||
| var b []byte | ||
| var err error | ||
|
|
||
| switch outputFormat { | ||
| case "json": | ||
| b, err = json.Marshal(nodes) | ||
| case "yaml": | ||
| b, err = yaml.Marshal(nodes) | ||
| } | ||
| if err != nil { | ||
| fmt.Println(err) | ||
| return | ||
| } | ||
| fmt.Println(string(b)) | ||
| } else { | ||
| for _, node := range nodes { | ||
| if !(outputFormat == "json" || outputFormat == "yaml") { | ||
| nodePrinter.Print(tabwriter, node) | ||
| } | ||
| } | ||
| } | ||
| } |