Initial commit

iso/run.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+# REFERENCE / OPTIONAL — the normal flow uses the official Arch ISO + `git clone`
+# (see README). Kept in case a self-contained custom ISO is ever wanted.
+#
+# Build the thin custom Arch ISO by extending the official `releng` profile with:
+#   - a few explicit installer packages (extra-packages.x86_64)
+#   - this repo baked into /root/arch-system-th
+#   - a login MOTD with install instructions (airootfs/etc/motd)
+#
+# Run on a machine with the `archiso` package installed (needs root for mkarchiso):
+#   sudo ./run.sh [output_dir]
+set -euo pipefail
+cd "$(dirname "$0")"
+REPO_ROOT="$(cd .. && pwd)"
+OUTDIR="${1:-$REPO_ROOT/out}"
+RELENG=/usr/share/archiso/configs/releng
+
+command -v mkarchiso >/dev/null || { echo "install archiso first: pacman -S archiso"; exit 1; }
+[ -d "$RELENG" ] || { echo "releng profile missing at $RELENG"; exit 1; }
+
+WORK="$(mktemp -d)"; PROFILE="$WORK/profile"
+trap 'rm -rf "$WORK"' EXIT
+
+cp -r "$RELENG" "$PROFILE"
+
+# extra installer packages
+cat extra-packages.x86_64 >> "$PROFILE/packages.x86_64"
+
+# our airootfs overlay (motd, etc.)
+cp -aT airootfs "$PROFILE/airootfs"
+
+# bake the repo into the live root (without git history / build output)
+dest="$PROFILE/airootfs/root/arch-system-th"
+mkdir -p "$dest"
+cp -a "$REPO_ROOT/." "$dest/"
+rm -rf "$dest/.git" "$dest/out"
+
+# mkarchiso copies airootfs with --no-preserve=mode, so exec bits are dropped and
+# must be declared in profiledef's file_permissions array (the same way releng's
+# own scripts get +x). We only need the bootstrap executable here; run.sh then
+# restores +x across the rest of the repo at runtime, which propagates to the
+# installed system. file_permissions+=(...) appends to the array defined in releng.
+printf '\nfile_permissions+=(["/root/arch-system-th/01-install/run.sh"]="0:0:755")\n' \
+  >> "$PROFILE/profiledef.sh"
+
+mkdir -p "$OUTDIR"
+mkarchiso -v -w "$WORK/work" -o "$OUTDIR" "$PROFILE"
+echo "ISO written to $OUTDIR"