pyrox.dev
1#! @bash@/bin/sh -e
2
3shopt -s nullglob
4
5export PATH=/empty:@path@
6
7if test $# -ne 1; then
8 echo "Usage: init-script-builder.sh DEFAULT-CONFIG"
9 exit 1
10fi
11
12defaultConfig="$1"
13
14
15[ "$(stat -f -c '%i' /)" = "$(stat -f -c '%i' /boot)" ] || {
16 # see grub-menu-builder.sh
17 echo "WARNING: /boot being on a different filesystem not supported by init-script-builder.sh"
18}
19
20
21
22target="/sbin/init"
23targetOther="/boot/init-other-configurations-contents.txt"
24
25tmp="$target.tmp"
26tmpOther="$targetOther.tmp"
27
28
29configurationCounter=0
30
31
32
33
34# Add an entry to $targetOther
35addEntry() {
36 local name="$1"
37 local path="$2"
38 local shortSuffix="$3"
39
40 configurationCounter=$((configurationCounter + 1))
41
42 local stage2=$path/init
43
44 content="$(
45 echo "#!/bin/sh"
46 echo "# $name"
47 echo "# created by init-script-builder.sh"
48 echo "exec $stage2"
49 )"
50
51 [ "$path" != "$defaultConfig" ] || {
52 echo "$content" > $tmp
53 echo "# older configurations: $targetOther" >> $tmp
54 chmod +x $tmp
55 }
56
57 echo -e "$content\n\n" >> $tmpOther
58}
59
60
61mkdir -p /boot /sbin
62
63addEntry "@distroName@ - Default" $defaultConfig ""
64
65# Add all generations of the system profile to the menu, in reverse
66# (most recent to least recent) order.
67for link in $((ls -d $defaultConfig/specialisation/* ) | sort -n); do
68 date=$(stat --printf="%y\n" $link | sed 's/\..*//')
69 addEntry "@distroName@ - variation" $link ""
70done
71
72for generation in $(
73 (cd /nix/var/nix/profiles && ls -d system-*-link) \
74 | sed 's/system-\([0-9]\+\)-link/\1/' \
75 | sort -n -r); do
76 link=/nix/var/nix/profiles/system-$generation-link
77 date=$(stat --printf="%y\n" $link | sed 's/\..*//')
78 if [ -d $link/kernel ]; then
79 kernelVersion=$(cd $(dirname $(readlink -f $link/kernel))/lib/modules && echo *)
80 suffix="($date - $kernelVersion)"
81 else
82 suffix="($date)"
83 fi
84 addEntry "@distroName@ - Configuration $generation $suffix" $link "$generation ($date)"
85done
86
87mv $tmpOther $targetOther
88mv $tmp $target