Making it work for arm installs as well

Makefile

@@ -1,9 +1,16 @@
 TOPDIR ?= $(CURDIR)/.rpmbuild
+ARCH ?= x86_64
 
-.PHONY: srpm clean
+.PHONY: srpm srpm-x86_64 srpm-aarch64 clean
 
 srpm:
-	./make-srpm.sh
+	ARCH="$(ARCH)" TOPDIR="$(TOPDIR)" ./make-srpm.sh
+
+srpm-x86_64:
+	ARCH="x86_64" TOPDIR="$(TOPDIR)" ./make-srpm.sh
+
+srpm-aarch64:
+	ARCH="aarch64" TOPDIR="$(TOPDIR)" ./make-srpm.sh
 
 clean:
 	rm -rf "$(TOPDIR)"

codex.spec

@@ -1,4 +1,5 @@
 %global up_version %{?up_version}%{!?up_version:0}
+%global package_arch %{?package_arch}%{!?package_arch:x86_64}
 %global debug_package %{nil}
 %global _build_id_links none
 %{!?bash_completions_dir:%global bash_completions_dir %{_datadir}/bash-completion/completions}
@@ -12,9 +13,9 @@ Summary:        OpenAI Codex command-line interface
 
 License:        Apache-2.0
 URL:            https://github.com/openai/codex
-Source0:        %{name}-%{version}-x86_64-unknown-linux-musl.tar.gz
+Source0:        %{name}-%{version}-%{package_arch}-unknown-linux-musl.tar.gz
 
-BuildArch:      x86_64
+ExclusiveArch:  x86_64 aarch64
 Requires:       git
 
 %description

make-srpm.sh

@@ -7,7 +7,20 @@ SOURCES_DIR="$TOPDIR/SOURCES"
 SRPMS_DIR="$TOPDIR/SRPMS"
 SPECS_DIR="$TOPDIR/SPECS"
 WORK_DIR="$(mktemp -d)"
-LATEST_URL="https://github.com/openai/codex/releases/latest/download/codex-x86_64-unknown-linux-musl.tar.gz"
+ARCH="${ARCH:-x86_64}"
+
+case "$ARCH" in
+  x86_64|aarch64)
+    ;;
+  *)
+    echo "Unsupported ARCH: $ARCH. Supported values: x86_64, aarch64" >&2
+    exit 1
+    ;;
+esac
+
+ASSET_BASENAME="codex-$ARCH-unknown-linux-musl"
+LATEST_URL="https://github.com/openai/codex/releases/latest/download/$ASSET_BASENAME.tar.gz"
+LATEST_RELEASE_API="https://api.github.com/repos/openai/codex/releases/latest"
 
 cleanup() {
   rm -rf "$WORK_DIR"
@@ -16,26 +29,35 @@ trap cleanup EXIT
 
 mkdir -p "$SOURCES_DIR" "$SRPMS_DIR" "$SPECS_DIR"
 
-ARCHIVE="$WORK_DIR/codex-x86_64-unknown-linux-musl.tar.gz"
-echo "Downloading latest Codex release tarball..."
+ARCHIVE="$WORK_DIR/$ASSET_BASENAME.tar.gz"
+echo "Downloading latest Codex release tarball for $ARCH..."
 curl -fL --retry 3 --retry-delay 2 -o "$ARCHIVE" "$LATEST_URL"
 
 mkdir -p "$WORK_DIR/unpack"
 tar -xzf "$ARCHIVE" -C "$WORK_DIR/unpack"
 
-UPSTREAM_BINARY="$WORK_DIR/unpack/codex-x86_64-unknown-linux-musl"
+UPSTREAM_BINARY="$WORK_DIR/unpack/$ASSET_BASENAME"
 if [[ ! -x "$UPSTREAM_BINARY" ]]; then
-  echo "Expected upstream binary codex-x86_64-unknown-linux-musl, but it was not found." >&2
+  echo "Expected upstream binary $ASSET_BASENAME, but it was not found." >&2
   exit 1
 fi
 
-VERSION="$("$UPSTREAM_BINARY" --version | awk '{print $2}')"
-if [[ -z "$VERSION" ]]; then
-  echo "Failed to determine Codex version from downloaded binary." >&2
+echo "Resolving latest release tag..."
+TAG="$(
+  curl -fsSL --retry 3 --retry-delay 2 "$LATEST_RELEASE_API" \
+    | sed -n 's/.*"tag_name":[[:space:]]*"\([^"]*\)".*/\1/p' \
+    | head -n1
+)"
+if [[ -z "$TAG" ]]; then
+  echo "Failed to determine latest release tag from GitHub API." >&2
   exit 1
 fi
 
-TAG="rust-v$VERSION"
+VERSION="${TAG#rust-v}"
+if [[ -z "$VERSION" || "$VERSION" == "$TAG" ]]; then
+  echo "Unexpected tag format: $TAG (expected rust-v<version>)." >&2
+  exit 1
+fi
 SOURCE_TREE="$WORK_DIR/codex-$VERSION"
 mkdir -p "$SOURCE_TREE"
 
@@ -49,15 +71,17 @@ curl -fL --retry 3 --retry-delay 2 \
   -o "$SOURCE_TREE/README.md" \
   "https://raw.githubusercontent.com/openai/codex/$TAG/README.md"
 
-SOURCE_ARCHIVE="$SOURCES_DIR/codex-$VERSION-x86_64-unknown-linux-musl.tar.gz"
+SOURCE_ARCHIVE="$SOURCES_DIR/codex-$VERSION-$ARCH-unknown-linux-musl.tar.gz"
 tar -C "$WORK_DIR" -czf "$SOURCE_ARCHIVE" "codex-$VERSION"
 
 cp codex.spec "$SPECS_DIR/codex.spec"
 
 echo "Building SRPM for version $VERSION..."
 rpmbuild \
+  --target "$ARCH" \
   --define "_topdir $TOPDIR" \
   --define "up_version $VERSION" \
+  --define "package_arch $ARCH" \
   -bs "$SPECS_DIR/codex.spec"
 
 echo