Lint fixes for authorized keys and principal packages

internal/command/authorizedkeys/authorized_keys.go

+// Package authorizedkeys handles fetching and printing authorized SSH keys.
 package authorizedkeys
 
 import (
@@ -12,12 +13,14 @@ import (
 	"gitlab.com/gitlab-org/gitlab-shell/v14/internal/keyline"
 )
 
+// Command contains the configuration, arguments, and I/O interfaces.
 type Command struct {
 	Config     *config.Config
 	Args       *commandargs.AuthorizedKeys
 	ReadWriter *readwriter.ReadWriter
 }
 
+// Execute runs the command to fetch and print the authorized SSH key.
 func (c *Command) Execute(ctx context.Context) (context.Context, error) {
 	// Do and return nothing when the expected and actual user don't match.
 	// This can happen when the user in sshd_config doesn't match the user
@@ -38,7 +41,7 @@ func (c *Command) Execute(ctx context.Context) (context.Context, error) {
 func (c *Command) printKeyLine(ctx context.Context) error {
 	response, err := c.getAuthorizedKey(ctx)
 	if err != nil {
-		fmt.Fprintln(c.ReadWriter.Out, fmt.Sprintf("# No key was found for %s", c.Args.Key))
+		_, _ = fmt.Fprintf(c.ReadWriter.Out, "# No key was found for %s\n", c.Args.Key)
 		return nil
 	}
 
@@ -47,7 +50,7 @@ func (c *Command) printKeyLine(ctx context.Context) error {
 		return err
 	}
 
-	fmt.Fprintln(c.ReadWriter.Out, keyLine.ToString())
+	_, _ = fmt.Fprintln(c.ReadWriter.Out, keyLine.ToString())
 
 	return nil
 }

internal/command/authorizedprincipals/authorized_principals.go

+// Package authorizedprincipals handles printing authorized principals in GitLab Shell.
 package authorizedprincipals
 
 import (
@@ -10,12 +11,14 @@ import (
 	"gitlab.com/gitlab-org/gitlab-shell/v14/internal/keyline"
 )
 
+// Command contains the configuration, arguments, and I/O interfaces.
 type Command struct {
 	Config     *config.Config
 	Args       *commandargs.AuthorizedPrincipals
 	ReadWriter *readwriter.ReadWriter
 }
 
+// Execute runs the command to print authorized principals.
 func (c *Command) Execute(ctx context.Context) (context.Context, error) {
 	if err := c.printPrincipalLines(); err != nil {
 		return ctx, err
@@ -42,7 +45,7 @@ func (c *Command) printPrincipalLine(principal string) error {
 		return err
 	}
 
-	fmt.Fprintln(c.ReadWriter.Out, principalKeyLine.ToString())
+	_, _ = fmt.Fprintln(c.ReadWriter.Out, principalKeyLine.ToString())
 
 	return nil
 }

support/lint_last_known_acceptable.txt

@@ -78,16 +78,7 @@ cmd/gitlab-sshd/main.go:30:5: var-naming: var gitlabUrl should be gitlabURL (rev
 cmd/gitlab-sshd/main.go:44: Function 'main' is too long (73 > 60) (funlen)
 cmd/gitlab-sshd/main.go:70:23: Error return value of `logCloser.Close` is not checked (errcheck)
 cmd/gitlab-sshd/main.go:108:18: Error return value of `server.Shutdown` is not checked (errcheck)
-internal/command/authorizedkeys/authorized_keys.go:1:1: package-comments: should have a package comment (revive)
-internal/command/authorizedkeys/authorized_keys.go:15:6: exported: exported type Command should have comment or be unexported (revive)
-internal/command/authorizedkeys/authorized_keys.go:21:1: exported: exported method Command.Execute should have comment or be unexported (revive)
-internal/command/authorizedkeys/authorized_keys.go:26: internal/command/authorizedkeys/authorized_keys.go:26: Line contains TODO/BUG/FIXME/NOTE/OPTIMIZE/HACK: "TODO: Log this event once we have a cons..." (godox)
-internal/command/authorizedkeys/authorized_keys.go:41:15: Error return value of `fmt.Fprintln` is not checked (errcheck)
-internal/command/authorizedkeys/authorized_keys.go:50:14: Error return value of `fmt.Fprintln` is not checked (errcheck)
-internal/command/authorizedprincipals/authorized_principals.go:1:1: package-comments: should have a package comment (revive)
-internal/command/authorizedprincipals/authorized_principals.go:13:6: exported: exported type Command should have comment or be unexported (revive)
-internal/command/authorizedprincipals/authorized_principals.go:19:1: exported: exported method Command.Execute should have comment or be unexported (revive)
-internal/command/authorizedprincipals/authorized_principals.go:45:14: Error return value of `fmt.Fprintln` is not checked (errcheck)
+internal/command/authorizedkeys/authorized_keys.go:29: internal/command/authorizedkeys/authorized_keys.go:29: Line contains TODO/BUG/FIXME/NOTE/OPTIMIZE/HACK: "TODO: Log this event once we have a cons..." (godox)
 internal/command/command.go:1:1: package-comments: should have a package comment (revive)
 internal/command/command.go:15:6: exported: exported type Command should have comment or be unexported (revive)
 internal/command/command.go:19:6: exported: exported type LogMetadata should have comment or be unexported (revive)