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list.go
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list.go
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package main
import (
"encoding/json"
"fmt"
"os"
"sort"
"text/tabwriter"
"github.com/pgavlin/dawn"
"github.com/pgavlin/dawn/label"
"github.com/spf13/cobra"
)
var listJSON bool
type flagDescription struct {
Name string `json:"name"`
Type string `json:"type"`
Help string `json:"help"`
}
func printFlagList(list []*dawn.Flag) error {
if !listJSON {
w := tabwriter.NewWriter(os.Stdout, 0, 2, 0, ' ', 0)
for _, flag := range list {
defaultValue := ""
if flag.Default != "" {
defaultValue = fmt.Sprintf("(%s)", flag.Default)
}
fmt.Fprintf(w, "--%s %s\t %s\t %s\n", flag.Name, flag.FlagType, defaultValue, flag.Help)
}
return w.Flush()
}
descriptions := make([]flagDescription, len(list))
for i, arg := range list {
descriptions[i] = flagDescription{
Name: arg.Name,
Help: arg.Help,
}
}
enc := json.NewEncoder(os.Stdout)
enc.SetIndent("", " ")
return enc.Encode(descriptions)
}
type targetDescription struct {
Label string `json:"label"`
Doc string `json:"doc"`
}
func printTargetList(list []dawn.Target) error {
if !listJSON {
w := tabwriter.NewWriter(os.Stdout, 0, 2, 0, ' ', 0)
for _, t := range list {
fmt.Fprintf(w, "%v\t %s\n", t.Label(), dawn.DocSummary(t))
}
return w.Flush()
}
descriptions := make([]targetDescription, len(list))
for i, t := range list {
descriptions[i] = targetDescription{
Label: t.Label().String(),
Doc: t.Doc(),
}
}
enc := json.NewEncoder(os.Stdout)
enc.SetIndent("", " ")
return enc.Encode(descriptions)
}
func printStringList(list []string) error {
sort.Strings(list)
if !listJSON {
for _, l := range list {
fmt.Println(l)
}
return nil
}
enc := json.NewEncoder(os.Stdout)
enc.SetIndent("", " ")
return enc.Encode(list)
}
var listCmd = &cobra.Command{
Use: "list",
Short: "List information about a project or targets",
}
var flagsCmd = &cobra.Command{
Use: "flags",
Short: "List available flags",
Args: cobra.ArbitraryArgs,
RunE: func(cmd *cobra.Command, args []string) error {
if err := work.loadProject(args, true, listJSON); err != nil {
return err
}
work.renderer.Close()
return printFlagList(work.project.Flags())
},
}
var targetsCmd = &cobra.Command{
Use: "targets",
Short: "List available targets",
Args: cobra.ArbitraryArgs,
RunE: func(cmd *cobra.Command, args []string) error {
if err := work.loadProject(args, true, listJSON); err != nil {
return err
}
work.renderer.Close()
return printTargetList(work.project.Targets())
},
}
var dependsCmd = newTargetCommand(&targetCommand{
Use: "depends",
Short: "List a target's transitive dependencies",
Run: func(label *label.Label, args []string) error {
if err := work.loadProject(args, true, listJSON); err != nil {
return err
}
work.renderer.Close()
labels, err := work.depends(label)
if err != nil {
return err
}
return printStringList(labels)
},
})
var whatDependsCmd = newTargetCommand(&targetCommand{
Use: "what-depends",
Short: "List a target's transitive dependents",
Run: func(label *label.Label, args []string) error {
if err := work.loadProject(args, true, listJSON); err != nil {
return err
}
work.renderer.Close()
labels, err := work.whatDepends(label)
if err != nil {
return err
}
return printStringList(labels)
},
})
var sourcesCmd = newTargetCommand(&targetCommand{
Use: "sources",
Short: "List a target's sources",
Run: func(label *label.Label, args []string) error {
if err := work.loadProject(args, true, listJSON); err != nil {
return err
}
work.renderer.Close()
paths, err := work.sources(label)
if err != nil {
return err
}
return printStringList(paths)
},
})
func init() {
listCmd.PersistentFlags().BoolVar(&listJSON, "json", false, "write JSON output")
listCmd.AddCommand(flagsCmd)
listCmd.AddCommand(targetsCmd)
listCmd.AddCommand(dependsCmd)
listCmd.AddCommand(whatDependsCmd)
listCmd.AddCommand(sourcesCmd)
}