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nixos/grub: Add submenu for each generation with specialisation

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Before this commit there was no way to access (boot into) specialisation of previous generations from grub,even tho they are there.

This commit will add grub submenu for each generation if the generation has any specialisation.
Which will allow you to boot into them.

Co-authored-by: Samuel Dionne-Riel <samuel@dionne-riel.com>
This commit is contained in:
dev-null-undefined 2023-07-27 15:29:57 +02:00
parent 33cd48c86b
commit a39526b3ef
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GPG key ID: 47230B659BA8E169
1 changed files with 41 additions and 26 deletions
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67
nixos/modules/system/boot/loader/grub/install-grub.pl
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@ -516,38 +516,53 @@ sub addEntry {
$conf .= "}\n\n";
}
sub addGeneration {
my ($name, $nameSuffix, $path, $options, $current) = @_;
# Do not search for grand children
my @links = sort (glob "$path/specialisation/*");
if ($current != 1 && scalar(@links) != 0) {
$conf .= "submenu \"> $name$nameSuffix\" --class submenu {\n";
}
addEntry("$name" . (scalar(@links) == 0 ? "" : " - Default") . $nameSuffix, $path, $options, $current);
# Find all the children of the current default configuration
# Do not search for grand children
foreach my $link (@links) {
my $entryName = "";
my $cfgName = readFile("$link/configuration-name");
my $date = strftime("%F", localtime(lstat($link)->mtime));
my $version =
-e "$link/nixos-version"
? readFile("$link/nixos-version")
: basename((glob(dirname(Cwd::abs_path("$link/kernel")) . "/lib/modules/*"))[0]);
if ($cfgName) {
$entryName = $cfgName;
} else {
my $linkname = basename($link);
$entryName = "($linkname - $date - $version)";
}
addEntry("$name - $entryName", $link, "", 1);
}
if ($current != 1 && scalar(@links) != 0) {
$conf .= "}\n";
}
}
# Add default entries.
$conf .= "$extraEntries\n" if $extraEntriesBeforeNixOS;
addEntry("@distroName@ - Default", $defaultConfig, $entryOptions, 1);
addGeneration("@distroName@", "", $defaultConfig, $entryOptions, 1);
$conf .= "$extraEntries\n" unless $extraEntriesBeforeNixOS;
# Find all the children of the current default configuration
# Do not search for grand children
my @links = sort (glob "$defaultConfig/specialisation/*");
foreach my $link (@links) {
my $entryName = "";
my $cfgName = readFile("$link/configuration-name");
my $date = strftime("%F", localtime(lstat($link)->mtime));
my $version =
-e "$link/nixos-version"
? readFile("$link/nixos-version")
: basename((glob(dirname(Cwd::abs_path("$link/kernel")) . "/lib/modules/*"))[0]);
if ($cfgName) {
$entryName = $cfgName;
} else {
my $linkname = basename($link);
$entryName = "($linkname - $date - $version)";
}
addEntry("@distroName@ - $entryName", $link, "", 1);
}
my $grubBootPath = $grubBoot->path;
# extraEntries could refer to @bootRoot@, which we have to substitute
$conf =~ s/\@bootRoot\@/$grubBootPath/g;
@ -577,7 +592,7 @@ sub addProfile {
-e "$link/nixos-version"
? readFile("$link/nixos-version")
: basename((glob(dirname(Cwd::abs_path("$link/kernel")) . "/lib/modules/*"))[0]);
addEntry("@distroName@ - Configuration " . nrFromGen($link) . " ($date - $version)", $link, $subEntryOptions, 0);
addGeneration("@distroName@ - Configuration " . nrFromGen($link), " ($date - $version)", $link, $subEntryOptions, 0);
}
$conf .= "}\n";