feat(metadata): admin-configurable platform dropdown options

The repo metadata 'platform' field was a hardcoded enum; changing the
taxonomy meant a code change + redeploy. Make it admin-configurable:

- modules/setting/metadata.go: new [metadata] PLATFORM_OPTIONS setting
  (default joomla,dolibarr,go,npm,generic), loaded in loadCommonSettingsFrom
- routers/web/admin/metadata.go + templates/admin/metadata.tmpl: new
  Admin -> Metadata page to edit the list (persisted to app.ini), with a
  nav entry and route
- routers/web/repo/setting/metadata.go + template: platform dropdown now
  reads from the setting; a repo's current value stays selectable even if
  removed from the list (no silent drop)

Closes #777

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## [Unreleased]
 
 ### Added
+- Metadata platform options are now **admin-configurable** instead of hardcoded: a new **Admin → Metadata** page edits the allowed `platform` values (persisted to `app.ini` `[metadata] PLATFORM_OPTIONS`, default `joomla,dolibarr,go,npm,generic`), and the repo Settings → Metadata platform dropdown reads from it. Changing the taxonomy no longer needs a code change/redeploy. A repo's existing platform value stays selectable even if later removed from the list (#777)
 - Org branch protection: repositories now show the inherited organization rules read-only in their Branch Protection settings, with an expandable detail (direct push, force-push, branch deletion, merge restrictions, required approvals, status checks, protected files, and whitelisted teams) — like GitHub surfaces org rulesets in a repo (#727)
 - Org branch protection: org-level rules can now also protect against branch deletion (`enable_delete` + delete allowlist teams), mirroring the per-repo delete allowlist (#727)
 - Org-level tag protection: protect tag patterns org-wide (e.g. `v*`) with a team allowlist, layered on top of each repo's own protected tags — a tag is controllable only if allowed at both levels (fail-closed). API at `/orgs/{org}/tag_protections`; enforced at the git push/delete hook and the release create/delete paths; shown read-only in the repo Tag settings (#727)

modules/setting/metadata.go

@@ -0,0 +1,22 @@
+// Copyright 2026 Moko Consulting <hello@mokoconsulting.tech>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package setting
+
+// Metadata holds instance-level settings for the repository metadata feature.
+var Metadata = struct {
+	// PlatformOptions is the admin-configurable list of allowed values for the
+	// repo metadata "platform" field. Editable via Admin -> Metadata (persisted
+	// to app.ini [metadata] PLATFORM_OPTIONS) so changing the taxonomy needs no
+	// code change or redeploy. See issue #777.
+	PlatformOptions []string
+}{
+	PlatformOptions: []string{"joomla", "dolibarr", "go", "npm", "generic"},
+}
+
+func loadMetadataFrom(rootCfg ConfigProvider) {
+	sec := rootCfg.Section("metadata")
+	if opts := sec.Key("PLATFORM_OPTIONS").Strings(","); len(opts) > 0 {
+		Metadata.PlatformOptions = opts
+	}
+}

modules/setting/setting.go

@@ -168,6 +168,7 @@ func loadCommonSettingsFrom(cfg ConfigProvider) error {
 	}
 	loadUIFrom(cfg)
 	loadAdminFrom(cfg)
+	loadMetadataFrom(cfg)
 	loadAPIFrom(cfg)
 	loadMetricsFrom(cfg)
 	loadCamoFrom(cfg)

routers/web/admin/metadata.go

@@ -0,0 +1,71 @@
+// Copyright 2026 Moko Consulting <hello@mokoconsulting.tech>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package admin
+
+import (
+	"net/http"
+	"strings"
+
+	"code.mokoconsulting.tech/MokoConsulting/MokoGitea/modules/log"
+	"code.mokoconsulting.tech/MokoConsulting/MokoGitea/modules/setting"
+	"code.mokoconsulting.tech/MokoConsulting/MokoGitea/modules/templates"
+	"code.mokoconsulting.tech/MokoConsulting/MokoGitea/services/context"
+)
+
+const tplMetadata templates.TplName = "admin/metadata"
+
+// Metadata shows the admin metadata-settings page.
+func Metadata(ctx *context.Context) {
+	ctx.Data["Title"] = "Metadata"
+	ctx.Data["PageIsAdminMetadata"] = true
+	ctx.Data["PlatformOptions"] = strings.Join(setting.Metadata.PlatformOptions, "\n")
+	ctx.HTML(http.StatusOK, tplMetadata)
+}
+
+// parsePlatformOptions normalizes admin input (comma- or newline-separated) into
+// a clean, lowercased, de-duplicated, order-preserving list of platform values.
+func parsePlatformOptions(raw string) []string {
+	seen := make(map[string]bool)
+	var out []string
+	for _, tok := range strings.FieldsFunc(raw, func(r rune) bool { return r == ',' || r == '\n' || r == '\r' }) {
+		v := strings.ToLower(strings.TrimSpace(tok))
+		if v == "" || seen[v] {
+			continue
+		}
+		seen[v] = true
+		out = append(out, v)
+	}
+	return out
+}
+
+// MetadataSettings persists the admin metadata settings.
+func MetadataSettings(ctx *context.Context) {
+	opts := parsePlatformOptions(ctx.FormString("platform_options"))
+	if len(opts) == 0 {
+		ctx.Flash.Error("Platform options cannot be empty")
+		ctx.Redirect(setting.AppSubURL + "/-/admin/metadata")
+		return
+	}
+
+	// Apply in-memory so the change takes effect without a restart.
+	setting.Metadata.PlatformOptions = opts
+
+	// Persist to app.ini [metadata] PLATFORM_OPTIONS.
+	cfg, err := setting.NewConfigProviderFromFile(setting.CustomConf)
+	if err != nil {
+		ctx.Flash.Error("Failed to load config: " + err.Error())
+		ctx.Redirect(setting.AppSubURL + "/-/admin/metadata")
+		return
+	}
+	cfg.Section("metadata").Key("PLATFORM_OPTIONS").SetValue(strings.Join(opts, ","))
+	if err := cfg.SaveTo(setting.CustomConf); err != nil {
+		ctx.Flash.Error("Failed to save config: " + err.Error())
+		log.Error("SaveTo %s: %v", setting.CustomConf, err)
+	} else {
+		ctx.Flash.Success("Metadata settings saved")
+		log.Info("Metadata platform options updated: %v", opts)
+	}
+
+	ctx.Redirect(setting.AppSubURL + "/-/admin/metadata")
+}

routers/web/repo/setting/metadata.go

@@ -10,6 +10,7 @@ import (
 
 	issues_model "code.mokoconsulting.tech/MokoConsulting/MokoGitea/models/issues"
 	repo_model "code.mokoconsulting.tech/MokoConsulting/MokoGitea/models/repo"
+	"code.mokoconsulting.tech/MokoConsulting/MokoGitea/modules/setting"
 	"code.mokoconsulting.tech/MokoConsulting/MokoGitea/modules/templates"
 	"code.mokoconsulting.tech/MokoConsulting/MokoGitea/services/context"
 )
@@ -43,6 +44,25 @@ func Metadata(ctx *context.Context) {
 	// It is displayed read-only. See issue #771.
 	ctx.Data["DerivedOrg"] = ctx.Repo.Repository.DerivedOrgName(ctx)
 
+	// Platform dropdown options come from the admin-configurable setting
+	// (Admin -> Metadata). Keep the repo's current value selectable even if it
+	// was later removed from the list, so saving does not silently drop it.
+	// See issue #777.
+	platformOpts := append([]string(nil), setting.Metadata.PlatformOptions...)
+	if manifest.Platform != "" {
+		found := false
+		for _, p := range platformOpts {
+			if p == manifest.Platform {
+				found = true
+				break
+			}
+		}
+		if !found {
+			platformOpts = append([]string{manifest.Platform}, platformOpts...)
+		}
+	}
+	ctx.Data["PlatformOptions"] = platformOpts
+
 	// Load repo-scoped custom fields.
 	fields, _ := issues_model.GetCustomFieldsByOwner(ctx, ownerID, issues_model.CustomFieldScopeRepo)
 	ctx.Data["CustomFieldDefs"] = fields
@@ -102,8 +122,8 @@ func saveMetadata(ctx *context.Context) {
 	existing, _ := repo_model.GetRepoMetadata(ctx, ctx.Repo.Repository.ID)
 
 	manifest := &repo_model.RepoMetadata{
-		RepoID:        ctx.Repo.Repository.ID,
+		RepoID: ctx.Repo.Repository.ID,
-		Name:          ctx.FormString("name"),
+		Name:   ctx.FormString("name"),
 		// org is not stored: it is derived from the org profile on read. See issue #771.
 		Description:   ctx.Repo.Repository.Description,
 		LicenseSPDX:   spdx,
@@ -113,7 +133,7 @@ func saveMetadata(ctx *context.Context) {
 		InfoURL:       ctx.FormString("info_url"),
 		TargetVersion: ctx.FormString("target_version"),
 		PHPMinimum:    ctx.FormString("php_minimum"),
-		ExtensionType:   ctx.FormString("extension_type"),
+		ExtensionType: ctx.FormString("extension_type"),
 		EntryPoint:    ctx.FormString("entry_point"),
 	}
 
@@ -160,4 +180,3 @@ func saveCustomFields(ctx *context.Context) {
 	ctx.Flash.Success("Custom fields saved")
 	ctx.Redirect(ctx.Repo.RepoLink + "/settings/metadata")
 }
-

routers/web/web.go

@@ -786,6 +786,11 @@ func registerWebRoutes(m *web.Router, webAuth *AuthMiddleware) {
 			m.Get("/reset", admin.BrandingReset)
 		})
 
+		m.Group("/metadata", func() {
+			m.Get("", admin.Metadata)
+			m.Post("/settings", admin.MetadataSettings)
+		})
+
 		m.Group("/monitor", func() {
 			m.Get("/stats", admin.MonitorStats)
 			m.Get("/cron", admin.CronTasks)
@@ -1239,7 +1244,7 @@ func registerWebRoutes(m *web.Router, webAuth *AuthMiddleware) {
 		}, repo_setting.SettingsCtxData)
 		m.Combo("/metadata").Get(repo_setting.Metadata).Post(repo_setting.MetadataPost)
 		m.Combo("/updateserver").Get(repo_setting.UpdateServerSettings).Post(repo_setting.UpdateServerSettingsPost)
-		m.Combo("/manifest").Get(repo_setting.LicensingSettings).Post(repo_setting.LicensingSettingsPost) // redirect
+		m.Combo("/manifest").Get(repo_setting.LicensingSettings).Post(repo_setting.LicensingSettingsPost)  // redirect
 		m.Combo("/licensing").Get(repo_setting.LicensingSettings).Post(repo_setting.LicensingSettingsPost) // redirect
 		m.Group("/security", func() {
 			m.Combo("").Get(repo_setting.SecuritySettings).Post(repo_setting.SecuritySettingsPost)

templates/admin/metadata.tmpl

@@ -0,0 +1,19 @@
+{{template "admin/layout_head" (dict "pageClass" "admin metadata")}}
+	<div class="admin-setting-content">
+		<h4 class="ui top attached header">
+			{{svg "octicon-list-unordered" 16}} Metadata
+		</h4>
+		<div class="ui attached segment">
+			<h5>Platform Options</h5>
+			<p class="tw-text-text-light tw-text-sm">Allowed values for the repository metadata <strong>Platform</strong> field. One per line (or comma-separated). Changes take effect immediately and are saved to <code>app.ini</code> <code>[metadata] PLATFORM_OPTIONS</code>.</p>
+			<form method="post" action="{{AppSubUrl}}/-/admin/metadata/settings">
+				{{.CsrfTokenHtml}}
+				<div class="field">
+					<textarea name="platform_options" rows="6" class="tw-w-full tw-font-mono" placeholder="joomla&#10;dolibarr&#10;go&#10;npm&#10;generic">{{.PlatformOptions}}</textarea>
+				</div>
+				<button type="submit" class="ui primary small button tw-mt-2">{{svg "octicon-check" 14}} Save Settings</button>
+			</form>
+			<p class="tw-text-text-light tw-text-sm tw-mt-3">Existing repositories keep their stored platform value even if it is later removed from this list; it simply won't be offered to other repos.</p>
+		</div>
+	</div>
+{{template "admin/layout_footer" .}}

templates/admin/navbar.tmpl

@@ -87,6 +87,9 @@
 		<a class="{{if .PageIsAdminBranding}}active {{end}}item" href="{{AppSubUrl}}/-/admin/branding">
 			{{svg "octicon-paintbrush" 16}} Branding
 		</a>
+		<a class="{{if .PageIsAdminMetadata}}active {{end}}item" href="{{AppSubUrl}}/-/admin/metadata">
+			{{svg "octicon-list-unordered" 16}} Metadata
+		</a>
 		<a class="{{if .PageIsAdminLicenseTiers}}active {{end}}item" href="{{AppSubUrl}}/-/admin/license-tiers">
 			{{svg "octicon-key" 16}} License Tiers
 		</a>

templates/repo/settings/metadata.tmpl

@@ -55,7 +55,7 @@
 				<select name="platform" class="ui dropdown">
 					<option value="">—</option>
 					{{$platform := .Manifest.Platform}}
-					{{range $val := StringUtils.Split "joomla,wordpress,dolibarr,go,mcp,platform,generic" ","}}
+					{{range $val := .PlatformOptions}}
 						<option value="{{$val}}" {{if eq $val $platform}}selected{{end}}>{{$val}}</option>
 					{{end}}
 				</select>