(catalog,manifest): handle some ignored errors

Also enable errcheck linter for future.
Ignore table printer errors for cli which are
self observable and mostly fine. Ignoring it
in tests. There are many violations, could be
enabled separately if needed.

Signed-off-by: ferhat elmas <elmas.ferhat@gmail.com>

Author: ferhatelmas

.golangci.yml

@@ -19,16 +19,26 @@ version: "2"
 linters:
   default: none
   enable:
+    - errcheck
     - misspell
     - nlreturn
     - perfsprint
+  settings:
+    errcheck:
+      exclude-functions:
+        - (github.com/pterm/pterm.TablePrinter).Render
+        - (github.com/pterm/pterm.TreePrinter).Render
   exclusions:
     generated: lax
     presets:
       - comments
       - common-false-positives
       - legacy
       - std-error-handling
+    rules:
+      - linters:
+          - errcheck
+        path: _test\.go$
     paths:
       - third_party$
       - builtin$

catalog/rest/rest.go

@@ -357,10 +357,12 @@ func doPostAllowNoContent[Payload, Result any](ctx context.Context, baseURI *url
 func handleNon200(rsp *http.Response, override map[int]error) error {
 	var e errorResponse
 
-	dec := json.NewDecoder(rsp.Body)
-	dec.Decode(&struct {
+	decErr := json.NewDecoder(rsp.Body).Decode(&struct {
 		Error *errorResponse `json:"error"`
 	}{Error: &e})
+	if decErr != nil {
+		return fmt.Errorf("%w: failed to decode error response: %s", ErrRESTError, decErr.Error())
+	}
 
 	if override != nil {
 		if err, ok := override[rsp.StatusCode]; ok {
@@ -569,7 +571,10 @@ func (r *Catalog) fetchAccessToken(cl *http.Client, creds string, opts *options)
 
 	switch rsp.StatusCode {
 	case http.StatusUnauthorized, http.StatusBadRequest:
-		defer rsp.Request.GetBody()
+		defer func() {
+			_, _ = io.Copy(io.Discard, rsp.Body)
+			_ = rsp.Body.Close()
+		}()
 		dec := json.NewDecoder(rsp.Body)
 		var oauthErr oauthErrorResponse
 		if err := dec.Decode(&oauthErr); err != nil {

catalog/sql/sql.go

@@ -154,7 +154,7 @@ type sqlIcebergNamespaceProps struct {
 }
 
 func withReadTx[R any](ctx context.Context, db *bun.DB, fn func(context.Context, bun.Tx) (R, error)) (result R, err error) {
-	db.RunInTx(ctx, &sql.TxOptions{ReadOnly: true}, func(ctx context.Context, tx bun.Tx) error {
+	err = db.RunInTx(ctx, &sql.TxOptions{ReadOnly: true}, func(ctx context.Context, tx bun.Tx) error {
 		result, err = fn(ctx, tx)
 
 		return err

manifest.go

@@ -1026,7 +1026,9 @@ func constructPartitionSummaries(spec PartitionSpec, schema *Schema, partitions
 
 	for _, part := range partitions {
 		for i, field := range partType.FieldList {
-			fieldStats[i].update(part[field.ID])
+			if err := fieldStats[i].update(part[field.ID]); err != nil {
+				return nil, fmt.Errorf("error updating field stats for partition %d: %s: %s", i, field.Name, err)
+			}
 		}
 	}