build: add cross compile script

cross-compile.py

@@ -0,0 +1,45 @@
+import os
+import subprocess
+
+
+BIN = "mangal"
+GOMOD = "github.com/metafates/mangal"
+PLATFORMS = {
+    "windows": {
+        "arch": ["arm", "arm64", "amd64", "386"],
+        "ext": ".exe"
+    },
+    "linux": {
+        "arch": ["arm", "arm64", "amd64", "386"],
+        "ext": ""
+    },
+    "darwin": {
+        "arch": ["arm64", "amd64"],
+        "ext": ""
+    }
+}
+
+
+def compile_for(goos):
+    os.environ["GOOS"] = goos
+
+    ext = PLATFORMS[goos]["ext"]
+
+    for arch in PLATFORMS[goos]["arch"]:
+        os.environ["GOARCH"] = arch
+        target = os.path.join("bin", f"{BIN}-{goos}-{arch}{ext}")
+
+        subprocess.call([
+            "go", "build",
+            "-o", target,
+            GOMOD 
+        ])
+
+
+def main():
+    for goos in PLATFORMS:
+        print(f"Compiling for {goos.title()}")
+        compile_for(goos)
+
+if __name__ == "__main__":
+    main()