Add linter

4 files changed, 43 insertions, 3 deletions

diff --git a/.github/workflows/golangci-lint.yml b/.github/workflows/golangci-lint.yml
new file mode 100644
index 0000000..c7a4cc2
--- /dev/null
+++ b/.github/workflows/golangci-lint.yml
@@ -0,0 +1,25 @@
+name: golangci-lint
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+permissions:
+  contents: read
+  # Optional: allow read access to pull requests. Use with `only-new-issues` option.
+  # pull-requests: read
+
+jobs:
+  golangci:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+      - uses: actions/setup-go@v6
+        with:
+          go-version: stable
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v9
+        with:
+          version: v2.6
diff --git a/.golangci.yml b/.golangci.yml
new file mode 100644
index 0000000..4bbb013
--- /dev/null
+++ b/.golangci.yml
@@ -0,0 +1,3 @@
+version: "2"
+linters:
+  default: standard
diff --git a/cmd/goaes/commands/decrypt.go b/cmd/goaes/commands/decrypt.go
index 5077e8c..f5f5dba 100644
--- a/cmd/goaes/commands/decrypt.go
+++ b/cmd/goaes/commands/decrypt.go
@@ -3,6 +3,7 @@ package commands
 import (
 	"context"
 	"encoding/gob"
+	"log/slog"
 	"os"
 
 	"github.com/nerdsec/goaes/internal"
@@ -17,7 +18,12 @@ func Decrypt(ctx context.Context, cmd *cli.Command) error {
 	if err != nil {
 		return err
 	}
-	defer file.Close()
+	defer func() {
+		err := file.Close()
+		if err != nil {
+			slog.Error("failed to close file", "error", err)
+		}
+	}()
 
 	enc := gob.NewDecoder(file)
 
@@ -33,7 +39,10 @@ func Decrypt(ctx context.Context, cmd *cli.Command) error {
 		return err
 	}
 
-	os.WriteFile(destination, plaintext, 0666)
+	err = os.WriteFile(destination, plaintext, 0666)
+	if err != nil {
+		return err
+	}
 
 	return nil
 }
diff --git a/cmd/goaes/commands/encrypt.go b/cmd/goaes/commands/encrypt.go
index 0c5d578..47809c4 100644
--- a/cmd/goaes/commands/encrypt.go
+++ b/cmd/goaes/commands/encrypt.go
@@ -32,7 +32,10 @@ func Encrypt(ctx context.Context, cmd *cli.Command) error {
 		return err
 	}
 
-	os.WriteFile(destination, dataBuffer.Bytes(), 0666)
+	err = os.WriteFile(destination, dataBuffer.Bytes(), 0666)
+	if err != nil {
+		return err
+	}
 
 	return nil
 }