1 files changed, 37 insertions, 0 deletions
diff --git a/workhorse/cmd/gitlab-resize-image/main.go b/workhorse/cmd/gitlab-resize-image/main.go
new file mode 100644
index 00000000000..662efd7306d
--- /dev/null
+++ b/workhorse/cmd/gitlab-resize-image/main.go
@@ -0,0 +1,37 @@
+package main
+
+import (
+	"fmt"
+	"image"
+	"os"
+	"strconv"
+
+	"github.com/disintegration/imaging"
+)
+
+func main() {
+	if err := _main(); err != nil {
+		fmt.Fprintf(os.Stderr, "%s: fatal: %v\n", os.Args[0], err)
+		os.Exit(1)
+	}
+}
+
+func _main() error {
+	widthParam := os.Getenv("GL_RESIZE_IMAGE_WIDTH")
+	requestedWidth, err := strconv.Atoi(widthParam)
+	if err != nil {
+		return fmt.Errorf("GL_RESIZE_IMAGE_WIDTH: %w", err)
+	}
+
+	src, formatName, err := image.Decode(os.Stdin)
+	if err != nil {
+		return fmt.Errorf("decode: %w", err)
+	}
+	imagingFormat, err := imaging.FormatFromExtension(formatName)
+	if err != nil {
+		return fmt.Errorf("find imaging format: %w", err)
+	}
+
+	image := imaging.Resize(src, requestedWidth, 0, imaging.Lanczos)
+	return imaging.Encode(os.Stdout, image, imagingFormat)
+}