add: zig and build.sh

build systems

toolchain/examples/buildsh-demo/build.sh

@@ -0,0 +1,26 @@
+#!/bin/sh
+# build.sh — example build.sh-style build script for zeta-makepkg.
+#
+# Invoked from the extracted source directory.  The tool sets:
+#   $DESTDIR  → staging tree root (e.g. /tmp/zeta-makepkg/buildsh-tool-.../stage)
+#
+# This script must compile/assemble the software and install every output
+# file under $DESTDIR with standard FHS paths (usr/bin/, usr/lib/, etc.).
+#
+# For a real project you would replace the example below with the project's
+# own build.sh — e.g. one that runs configure && make && make install with
+# DESTDIR set, or any autotools-like shell build sequence.
+
+set -eu
+
+echo "==> Building buildsh-tool (build.sh)"
+
+# Example: install a shell script into the staging tree
+mkdir -p "$DESTDIR/usr/bin"
+cat > "$DESTDIR/usr/bin/buildsh-tool" <<'EOF'
+#!/bin/sh
+echo "buildsh-tool 1.0"
+EOF
+chmod 755 "$DESTDIR/usr/bin/buildsh-tool"
+
+echo "==> Install complete"