lint: ensure errors are at least logged (errcheck)

Signed-off-by: Moritz Poldrack <moritz@poldrack.dev>
Acked-by: Robin Jarry <robin@jarry.cc>

5 files changed, 36 insertions, 12 deletions

diff --git a/lib/crypto/gpg/gpgbin/encrypt.go b/lib/crypto/gpg/gpgbin/encrypt.go
index 31245a74..9ca45269 100644
--- a/lib/crypto/gpg/gpgbin/encrypt.go
+++ b/lib/crypto/gpg/gpgbin/encrypt.go
@@ -25,15 +25,18 @@ func Encrypt(r io.Reader, to []string, from string) ([]byte, error) {
 	args = append(args, "--encrypt", "-")
 
 	g := newGpg(r, args)
-	g.cmd.Run()
+	err := 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: %v. check public key(s)", err)
 	}
 	var buf bytes.Buffer
-	io.Copy(&buf, md.Body)
+	_, _ = io.Copy(&buf, md.Body)
 
 	return buf.Bytes(), nil
 }
diff --git a/lib/crypto/gpg/gpgbin/gpgbin.go b/lib/crypto/gpg/gpgbin/gpgbin.go
index 2eb83dc9..1e8c7dcd 100644
--- a/lib/crypto/gpg/gpgbin/gpgbin.go
+++ b/lib/crypto/gpg/gpgbin/gpgbin.go
@@ -63,7 +63,11 @@ func getIdentity(key uint64) string {
 
 	var outbuf strings.Builder
 	cmd.Stdout = &outbuf
-	cmd.Run()
+	err := cmd.Run()
+	if err != nil {
+		logging.Errorf("gpg: failed to get identity: %v", err)
+		return ""
+	}
 	out := strings.Split(outbuf.String(), "\n")
 	for _, line := range out {
 		if strings.HasPrefix(line, "uid") {
@@ -85,7 +89,11 @@ func getKeyId(s string, private bool) string {
 
 	var outbuf strings.Builder
 	cmd.Stdout = &outbuf
-	cmd.Run()
+	err := cmd.Run()
+	if err != nil {
+		logging.Errorf("gpg: failed to get key ID: %v", err)
+		return ""
+	}
 	out := strings.Split(outbuf.String(), "\n")
 	for _, line := range out {
 		if strings.HasPrefix(line, "fpr") {
diff --git a/lib/crypto/gpg/gpgbin/keys.go b/lib/crypto/gpg/gpgbin/keys.go
index bef90cf6..ca166e9d 100644
--- a/lib/crypto/gpg/gpgbin/keys.go
+++ b/lib/crypto/gpg/gpgbin/keys.go
@@ -36,7 +36,10 @@ func ExportPublicKey(k string) (io.Reader, error) {
 	var stderr strings.Builder
 	cmd.Stdout = &outbuf
 	cmd.Stderr = &stderr
-	cmd.Run()
+	err := cmd.Run()
+	if err != nil {
+		return nil, fmt.Errorf("gpg: export failed: %w", err)
+	}
 	if strings.Contains(stderr.String(), "gpg") {
 		return nil, fmt.Errorf("gpg: error exporting key")
 	}
diff --git a/lib/crypto/gpg/gpgbin/sign.go b/lib/crypto/gpg/gpgbin/sign.go
index 31fd2b5a..caf31d14 100644
--- a/lib/crypto/gpg/gpgbin/sign.go
+++ b/lib/crypto/gpg/gpgbin/sign.go
@@ -17,15 +17,18 @@ func Sign(r io.Reader, from string) ([]byte, string, error) {
 	}
 
 	g := newGpg(r, args)
-	g.cmd.Run()
+	err := 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: %v", err)
 	}
 	var buf bytes.Buffer
-	io.Copy(&buf, md.Body)
+	_, _ = io.Copy(&buf, md.Body)
 	return buf.Bytes(), md.Micalg, nil
 }
diff --git a/lib/crypto/gpg/gpgbin/verify.go b/lib/crypto/gpg/gpgbin/verify.go
index be9f26f7..e5930849 100644
--- a/lib/crypto/gpg/gpgbin/verify.go
+++ b/lib/crypto/gpg/gpgbin/verify.go
@@ -2,6 +2,7 @@ package gpgbin
 
 import (
 	"bytes"
+	"fmt"
 	"io"
 	"io/ioutil"
 	"os"
@@ -19,7 +20,7 @@ func Verify(m io.Reader, s io.Reader) (*models.MessageDetails, error) {
 		if err != nil {
 			return nil, err
 		}
-		io.Copy(sig, s)
+		_, _ = io.Copy(sig, s)
 		sig.Close()
 		defer os.Remove(sig.Name())
 		args = append(args, sig.Name(), "-")
@@ -29,11 +30,17 @@ func Verify(m io.Reader, s io.Reader) (*models.MessageDetails, error) {
 		return nil, err
 	}
 	g := newGpg(bytes.NewReader(orig), args)
-	g.cmd.Run()
+	err = 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)
-	parse(out, md)
+	err = parse(out, md)
+	if err != nil {
+		return nil, fmt.Errorf("gpg: failed to parse result: %w", err)
+	}
 
 	md.Body = bytes.NewReader(orig)