mirror of
https://github.com/mudler/luet.git
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89 lines
2.3 KiB
Go
89 lines
2.3 KiB
Go
// Copyright © 2020 Ettore Di Giacinto
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program; if not, see <http://www.gnu.org/licenses/>.
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package extensions
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import (
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"fmt"
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"os"
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"path/filepath"
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"strings"
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"github.com/spf13/cobra"
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)
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type Extension struct {
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AbsPath string
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ShortName string
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}
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func (e Extension) String() string {
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return e.ShortName
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}
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func (e Extension) Short() string {
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return e.ShortName
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}
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func (e Extension) Path() string {
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return e.AbsPath
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}
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func (e Extension) CobraCommand() *cobra.Command {
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return &cobra.Command{
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Use: fmt.Sprintf("%s --help", e.Short()),
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Short: fmt.Sprintf("extension: %s (run to show the extension helper)", e.Short()),
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Long: ``,
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RunE: func(cmd *cobra.Command, args []string) error {
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return e.Exec(args)
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}}
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}
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// Discover returns extensions found in the paths specified and in PATH
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// Extensions must start with the project tag (e.g. 'myawesomecli-' )
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func Discover(project string, extensionpath ...string) []ExtensionInterface {
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var result []ExtensionInterface
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// by convention, extensions paths must have a prefix with the name of the project
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// e.g. 'foo-ext1' 'foo-ext2'
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projPrefix := fmt.Sprintf("%s-", project)
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paths := strings.Split(os.Getenv("PATH"), ":")
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for _, path := range extensionpath {
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if filepath.IsAbs(path) {
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paths = append(paths, path)
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continue
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}
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rel, err := RelativeToCwd(path)
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if err != nil {
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continue
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}
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paths = append(paths, rel)
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}
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for _, p := range paths {
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matches, err := filepath.Glob(filepath.Join(p, fmt.Sprintf("%s*", projPrefix)))
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if err != nil {
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continue
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}
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for _, m := range matches {
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short := strings.TrimPrefix(filepath.Base(m), projPrefix)
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result = append(result, Extension{AbsPath: m, ShortName: short})
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}
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}
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return result
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}
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