tests: fix errors after lint series

Fix the following test failures:

 FAIL: TestMessageInfoHandledError (0.00s)
 parse_test.go:53: could not parse envelope: date parsing failed:
 unrecognized date format:

 FAIL: TestReader (0.07s)
 gpg_test.go:27: using GNUPGHOME = /tmp/TestReader2384941142/001
 reader_test.go:108: Test case: Invalid Signature
 reader_test.go:112: gpg.Read() = gpgmail: failed to read PGP
 message: gpg: failed to run verification: exit status 1

Fixes: 5ca6022d00 ("lint: ensure errors are at least logged (errcheck)")
Fixes: 70bfcfef42 ("lint: work nicely with wrapped errors (errorlint)")
Signed-off-by: Robin Jarry <robin@jarry.cc>
Signed-off-by: Moritz Poldrack <moritz@poldrack.dev>

lib/crypto/gpg/gpgbin/encrypt.go

@@ -25,13 +25,10 @@ func Encrypt(r io.Reader, to []string, from string) ([]byte, error) {
 	args = append(args, "--encrypt", "-")
 
 	g := newGpg(r, args)
-	err := g.cmd.Run()
+	_ = g.cmd.Run()
-	if err != nil {
-		return nil, fmt.Errorf("gpg: failed to run encryption: %w", err)
-	}
 	outRdr := bytes.NewReader(g.stdout.Bytes())
 	var md models.MessageDetails
-	err = parse(outRdr, &md)
+	err := parse(outRdr, &md)
 	if err != nil {
 		return nil, fmt.Errorf("gpg: failure to encrypt: %w. check public key(s)", err)
 	}

lib/crypto/gpg/gpgbin/sign.go

@@ -17,14 +17,11 @@ func Sign(r io.Reader, from string) ([]byte, string, error) {
 	}
 
 	g := newGpg(r, args)
-	err := g.cmd.Run()
+	_ = g.cmd.Run()
-	if err != nil {
-		return nil, "", fmt.Errorf("failed to run signing: %w", err)
-	}
 
 	outRdr := bytes.NewReader(g.stdout.Bytes())
 	var md models.MessageDetails
-	err = parse(outRdr, &md)
+	err := parse(outRdr, &md)
 	if err != nil {
 		return nil, "", fmt.Errorf("failed to parse messagedetails: %w", err)
 	}

lib/crypto/gpg/gpgbin/verify.go

@@ -2,7 +2,6 @@ package gpgbin
 
 import (
 	"bytes"
-	"fmt"
 	"io"
 	"io/ioutil"
 	"os"
@@ -30,17 +29,11 @@ func Verify(m io.Reader, s io.Reader) (*models.MessageDetails, error) {
 		return nil, err
 	}
 	g := newGpg(bytes.NewReader(orig), args)
-	err = g.cmd.Run()
+	_ = g.cmd.Run()
-	if err != nil {
-		return nil, fmt.Errorf("gpg: failed to run verification: %w", err)
-	}
 
 	out := bytes.NewReader(g.stdout.Bytes())
 	md := new(models.MessageDetails)
-	err = parse(out, md)
+	_ = parse(out, md)
-	if err != nil {
-		return nil, fmt.Errorf("gpg: failed to parse result: %w", err)
-	}
 
 	md.Body = bytes.NewReader(orig)
 

worker/lib/parse.go

@@ -167,7 +167,7 @@ func parseEnvelope(h *mail.Header) (*models.Envelope, error) {
 	if err != nil {
 		// still return a valid struct plus a sentinel date parsing error
 		// if only the date parsing failed
-		err = fmt.Errorf("%v: %w", DateParseError, err)
+		err = fmt.Errorf("%w: %v", DateParseError, err)
 	}
 	return &models.Envelope{
 		Date:      date,