mkwheels: add script skeleton with arg parse and tool checks

1 files changed, 57 insertions, 0 deletions

diff --git a/mkwheels b/mkwheels
new file mode 100755
index 0000000..1692842
--- /dev/null
+++ b/mkwheels
@@ -0,0 +1,57 @@
+#!/bin/bash
+# mkwheels — build a reproducible, pinned Python wheels tarball for a package.
+#
+# Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 as published by
+# the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, see <https://www.gnu.org/licenses/>.
+set -eu
+
+usage() {
+    cat <<EOF
+usage: ${0##*/} <pkg> <ver> [epoch]
+
+Build a reproducible pinned Python wheels tarball <pkg>-wheels-<ver>.tar.gz
+plus a hashed requirements.txt, for vendoring into a SlackBuild.
+
+  <pkg> <ver>  PyPI package name and exact version to vendor.
+  [epoch]      SOURCE_DATE_EPOCH for the tarball mtime. Omitted -> auto-derived
+               from the PyPI release upload time (a warning is printed).
+
+  OUTPUT       env var: output directory (default: current dir).
+
+Requires: python3+pip, jq, curl, tar, gzip, md5sum.
+EOF
+}
+
+case "${1:-}" in
+    -h|--help) usage; exit 0 ;;
+esac
+[ $# -ge 2 ] && [ $# -le 3 ] || { usage >&2; exit 2; }
+
+pkg=$1
+ver=$2
+epoch=${3:-}
+OUTPUT=${OUTPUT:-$PWD}
+
+# Check required tools up front.
+for tool in python3 jq curl tar gzip md5sum; do
+    command -v "$tool" >/dev/null 2>&1 || {
+        echo "error: required tool not found: $tool" >&2
+        exit 1
+    }
+done
+python3 -m pip --version >/dev/null 2>&1 || {
+    echo "error: python3 pip module not available" >&2
+    exit 1
+}
+
+echo "mkwheels: $pkg $ver -> $OUTPUT/$pkg-wheels-$ver.tar.gz"