wehub-resource-sync
97 lines
2.5 KiB
Go
97 lines
2.5 KiB
Go
package pluginmgr
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import (
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"fmt"
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"net/url"
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"path"
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"strings"
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)
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// resolveSource parses a plugin source string into a download URL and plugin name.
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//
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// Supported formats:
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//
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// user/repo → GitHub (HEAD)
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// user/repo@v1.0 → GitHub (tag)
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// gitlab:user/repo → GitLab (HEAD)
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// gitlab:user/repo@v1.0 → GitLab (tag)
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// codeberg:user/repo → Codeberg (main)
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// codeberg:user/repo@v1 → Codeberg (tag)
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// https://example.com/plugin.lua → raw URL
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func resolveSource(source string) (urls []string, name string, err error) {
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// Raw URL.
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if strings.HasPrefix(source, "http://") || strings.HasPrefix(source, "https://") {
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u, err := url.Parse(source)
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if err != nil {
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return nil, "", fmt.Errorf("invalid URL: %w", err)
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}
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base := path.Base(u.Path)
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name = strings.TrimSuffix(base, ".lua")
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if name == "" || name == "." || name == "/" {
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return nil, "", fmt.Errorf("cannot derive a plugin name from URL %q; it should end in <name>.lua", source)
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}
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return []string{source}, name, nil
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}
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// Detect forge prefix.
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forge := "github"
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repo := source
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if prefix, rest, ok := strings.Cut(source, ":"); ok {
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switch prefix {
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case "gitlab", "codeberg":
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forge = prefix
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repo = rest
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default:
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return nil, "", fmt.Errorf("unknown forge prefix %q (supported: gitlab, codeberg)", prefix)
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}
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}
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// Split repo@tag.
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ref := ""
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if r, tag, ok := strings.Cut(repo, "@"); ok {
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repo = r
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ref = tag
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}
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// Validate user/repo format.
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parts := strings.SplitN(repo, "/", 3)
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if len(parts) != 2 || parts[0] == "" || parts[1] == "" {
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return nil, "", fmt.Errorf("invalid source %q (expected user/repo)", source)
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}
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name = parts[1]
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// Convention: repos are named cliamp-plugin-<name> with entry point <name>.lua.
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short := strings.TrimPrefix(name, "cliamp-plugin-")
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u, err := buildForgeURL(forge, repo, ref, short)
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if err != nil {
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return nil, "", err
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}
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return []string{u}, short, nil
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}
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func buildForgeURL(forge, repo, ref, entrypoint string) (string, error) {
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var base string
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switch forge {
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case "github":
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if ref == "" {
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ref = "HEAD"
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}
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base = fmt.Sprintf("https://raw.githubusercontent.com/%s/%s", repo, ref)
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case "gitlab":
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if ref == "" {
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ref = "HEAD"
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}
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base = fmt.Sprintf("https://gitlab.com/%s/-/raw/%s", repo, ref)
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case "codeberg":
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if ref == "" {
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base = fmt.Sprintf("https://codeberg.org/%s/raw/branch/main", repo)
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} else {
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base = fmt.Sprintf("https://codeberg.org/%s/raw/tag/%s", repo, ref)
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}
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default:
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return "", fmt.Errorf("unsupported forge %q", forge)
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}
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return base + "/" + entrypoint + ".lua", nil
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}
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