Limit dev mode to seeded packages only and fix lint errors

Dev build was processing all ~46,500 packages in the DB (from prior SVN
discovery), hitting macOS file descriptor limits. Now dev.go filters both
the metadata fetch and build steps to only the ~27 seed config packages.

Also fix unchecked errcheck warnings in handlers.go and server.go.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: retlehs

cmd/wpcomposer/cmd/dev.go

@@ -67,7 +67,13 @@ func runDev(cmd *cobra.Command, args []string) error {
 		return fmt.Errorf("discover: %w", err)
 	}
 
-	// 4. Update all packages
+	// 4. Update seeded packages only
+	seeds, err := packages.LoadSeeds(application.Config.Discovery.SeedsFile)
+	if err != nil {
+		return fmt.Errorf("loading seeds: %w", err)
+	}
+	seedSlugs := append(seeds.PopularPlugins, seeds.PopularThemes...)
+
 	application.Logger.Info("dev: fetching package metadata")
 	syncRun, err := packages.AllocateSyncRunID(ctx, application.DB)
 	if err != nil {
@@ -76,6 +82,7 @@ func runDev(cmd *cobra.Command, args []string) error {
 
 	pkgs, err := packages.GetPackagesNeedingUpdate(ctx, application.DB, packages.UpdateQueryOpts{
 		Type:  "all",
+		Names: seedSlugs,
 		Force: true,
 	})
 	if err != nil {
@@ -127,10 +134,11 @@ func runDev(cmd *cobra.Command, args []string) error {
 	application.Logger.Info("dev: building repository")
 	output := filepath.Join("storage", "repository", "builds")
 	result, err := repository.Build(ctx, application.DB, repository.BuildOpts{
-		OutputDir: output,
-		AppURL:    application.Config.AppURL,
-		Force:     true,
-		Logger:    application.Logger,
+		OutputDir:    output,
+		AppURL:       application.Config.AppURL,
+		Force:        true,
+		PackageNames: seedSlugs,
+		Logger:       application.Logger,
 	})
 	if err != nil {
 		return fmt.Errorf("build: %w", err)

internal/http/handlers.go

@@ -361,7 +361,7 @@ func handleAdminLogStream(a *app.App) http.HandlerFunc {
 			if opened, err := os.Open(logPath); err == nil {
 				f = opened
 			} else {
-				fmt.Fprintf(w, "data: Waiting for %s ...\n\n", filepath.Base(logPath))
+				_, _ = fmt.Fprintf(w, "data: Waiting for %s ...\n\n", filepath.Base(logPath))
 				flusher.Flush()
 				select {
 				case <-ctx.Done():
@@ -370,12 +370,12 @@ func handleAdminLogStream(a *app.App) http.HandlerFunc {
 				}
 			}
 		}
-		defer f.Close()
+		defer func() { _ = f.Close() }()
 
 		// Send initial batch: last 200 lines
 		lines := tailFile(logPath, 200)
 		for _, line := range lines {
-			fmt.Fprintf(w, "data: %s\n\n", line)
+			_, _ = fmt.Fprintf(w, "data: %s\n\n", line)
 		}
 		flusher.Flush()
 
@@ -395,7 +395,7 @@ func handleAdminLogStream(a *app.App) http.HandlerFunc {
 				}
 				if info.Size() < offset {
 					// File was truncated/rotated, reopen
-					f.Close()
+					_ = f.Close()
 					f, err = os.Open(logPath)
 					if err != nil {
 						continue

internal/http/server.go

@@ -85,7 +85,7 @@ func socketActivationListener() (net.Listener, error) {
 	if f == nil {
 		return nil, nil
 	}
-	defer f.Close()
+	defer func() { _ = f.Close() }()
 
 	ln, err := net.FileListener(f)
 	if err != nil {

internal/packages/package.go

@@ -5,6 +5,7 @@ import (
 	"database/sql"
 	"encoding/json"
 	"fmt"
+	"strings"
 	"time"
 
 	"github.com/roots/wp-composer/internal/version"
@@ -248,6 +249,7 @@ func BatchUpsertPackages(ctx context.Context, db *sql.DB, pkgs []*Package) error
 type UpdateQueryOpts struct {
 	Type            string
 	Name            string
+	Names           []string // filter to these slugs only
 	Force           bool
 	IncludeInactive bool
 	Limit           int
@@ -263,6 +265,15 @@ func GetPackagesNeedingUpdate(ctx context.Context, db *sql.DB, opts UpdateQueryO
 		args = append(args, opts.Name)
 	}
 
+	if len(opts.Names) > 0 {
+		placeholders := make([]string, len(opts.Names))
+		for i, n := range opts.Names {
+			placeholders[i] = "?"
+			args = append(args, n)
+		}
+		query += ` AND name IN (` + strings.Join(placeholders, ",") + `)`
+	}
+
 	if opts.Type != "" && opts.Type != "all" {
 		query += ` AND type = ?`
 		args = append(args, opts.Type)

internal/repository/builder.go

@@ -18,8 +18,9 @@ type BuildOpts struct {
 	OutputDir        string // base output dir (e.g. storage/repository/builds)
 	AppURL           string // absolute app URL for notify-batch
 	Force            bool
-	PackageName      string // optional: build single package
-	PreviousBuildDir string // optional: previous build dir for incremental builds
+	PackageName      string   // optional: build single package
+	PackageNames     []string // optional: build only these slugs
+	PreviousBuildDir string   // optional: previous build dir for incremental builds
 	Logger           *slog.Logger
 }
 
@@ -97,6 +98,14 @@ func Build(ctx context.Context, db *sql.DB, opts BuildOpts) (*BuildResult, error
 		query += ` AND (type || '/' || name) = ?`
 		args = append(args, opts.PackageName)
 	}
+	if len(opts.PackageNames) > 0 {
+		placeholders := make([]string, len(opts.PackageNames))
+		for i, n := range opts.PackageNames {
+			placeholders[i] = "?"
+			args = append(args, n)
+		}
+		query += ` AND name IN (` + strings.Join(placeholders, ",") + `)`
+	}
 	query += ` ORDER BY type, name`
 
 	rows, err := db.QueryContext(ctx, query, args...)