From 85b85ac4a37ce9d77ad24bfd9b50a73001d4ffd2 Mon Sep 17 00:00:00 2001
From: dalto <dalto@fastmail.com>
Date: Thu, 25 Feb 2021 08:46:24 -0600
Subject: [PATCH] Create mkinitcpio presets

---
 PKGBUILD                                      |  7 +---
 .../pacman.d/hooks/60-mkinitcpio-remove.hook  | 10 +++++
 .../pacman.d/hooks/90-mkinitcpio-install.hook | 11 ++++++
 .../scripts/kernel-install-mkinitcpio-install | 38 +++++++++++++++++++
 .../scripts/kernel-install-mkinitcpio-remove  | 14 +++++++
 5 files changed, 74 insertions(+), 6 deletions(-)
 create mode 100644 src/etc/pacman.d/hooks/60-mkinitcpio-remove.hook
 create mode 100644 src/etc/pacman.d/hooks/90-mkinitcpio-install.hook
 create mode 100644 src/usr/share/libalpm/scripts/kernel-install-mkinitcpio-install
 create mode 100644 src/usr/share/libalpm/scripts/kernel-install-mkinitcpio-remove

diff --git a/PKGBUILD b/PKGBUILD
index d3c0b64..1d485b6 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,5 +1,5 @@
 pkgname=eos-systemd-boot
-pkgver=0.03
+pkgver=0.1
 pkgrel=1
 pkgdesc='Enables systemd-boot automation using kernel-install on EndeavourOS'
 arch=(any)
@@ -20,9 +20,4 @@ package()
     # mask the default loaderentry creator
     mkdir -p "${pkgdir}/etc/kernel/install.d"
     touch "${pkgdir}/etc/kernel/install.d/90-loaderentry.install"
-
-    # mask the mkinitcpio hooks
-    mkdir -p "${pkgdir}/etc/pacman.d/hooks"
-    touch "${pkgdir}/etc/pacman.d/hooks/90-mkinitcpio-install.hook"
-    touch "${pkgdir}/etc/pacman.d/hooks/60-mkinitcpio-remove.hook"
 }
diff --git a/src/etc/pacman.d/hooks/60-mkinitcpio-remove.hook b/src/etc/pacman.d/hooks/60-mkinitcpio-remove.hook
new file mode 100644
index 0000000..19af1b1
--- /dev/null
+++ b/src/etc/pacman.d/hooks/60-mkinitcpio-remove.hook
@@ -0,0 +1,10 @@
+[Trigger]
+Type = Path
+Operation = Remove
+Target = usr/lib/modules/*/vmlinuz
+
+[Action]
+Description = Removing mkinitcpio presets...
+When = PreTransaction
+Exec = /usr/share/libalpm/scripts/kernel-install-mkinitcpio-remove
+NeedsTargets
diff --git a/src/etc/pacman.d/hooks/90-mkinitcpio-install.hook b/src/etc/pacman.d/hooks/90-mkinitcpio-install.hook
new file mode 100644
index 0000000..4653c7c
--- /dev/null
+++ b/src/etc/pacman.d/hooks/90-mkinitcpio-install.hook
@@ -0,0 +1,11 @@
+[Trigger]
+Type = Path
+Operation = Install
+Operation = Upgrade
+Target = usr/lib/modules/*/vmlinuz
+
+[Action]
+Description = Installing mkinitcpio presets...
+When = PostTransaction
+Exec = /usr/share/libalpm/scripts/kernel-install-mkinitcpio-install
+NeedsTargets
diff --git a/src/usr/share/libalpm/scripts/kernel-install-mkinitcpio-install b/src/usr/share/libalpm/scripts/kernel-install-mkinitcpio-install
new file mode 100644
index 0000000..7383549
--- /dev/null
+++ b/src/usr/share/libalpm/scripts/kernel-install-mkinitcpio-install
@@ -0,0 +1,38 @@
+#!/bin/bash -e
+
+while read -r line; do
+
+    if ! read -r pkgbase > /dev/null 2>&1 < "${line%/vmlinuz}/pkgbase"; then
+        # if the kernel has no pkgbase, we skip it
+        continue
+    fi
+    
+    # parse the input
+    version=$(basename "${line%/vmlinuz}")
+	vmlinuz="/${line}"
+    packagename=$(cat ${line%/vmlinuz}/pkgbase)
+
+    preset_file="/etc/mkinitcpio.d/${packagename}.preset"
+  
+    # get the machine-id
+    machineid=$(cat /etc/machine-id)
+    if [[ -z ${machineid} ]]; then
+        echo "Failed to get the machine ID"
+        exit
+    fi
+
+    # Find the configured esp
+    esp=$(bootctl -p)
+
+    # create a preset compatible with kernel-install
+    preset_file="/etc/mkinitcpio.d/${packagename}.preset"
+    echo ":: Modifying ${preset_file}"
+
+    echo 'ALL_config="/etc/mkinitcpio.conf"' > ${preset_file}
+    echo 'ALL_kver="'"${esp}/${machineid}/${version}/linux"'"' >> ${preset_file}
+    echo 'PRESETS=('default' 'fallback')' >> ${preset_file}
+    echo 'default_image="'"${esp}/${machineid}/${version}/initrd"'"' >> ${preset_file}
+    echo 'fallback_image="'"${esp}/${machineid}/${version}/initrd-fallback"'"' >> ${preset_file}
+    echo 'fallback_options="-S autodetect"' >> ${preset_file}
+
+done
diff --git a/src/usr/share/libalpm/scripts/kernel-install-mkinitcpio-remove b/src/usr/share/libalpm/scripts/kernel-install-mkinitcpio-remove
new file mode 100644
index 0000000..79151e3
--- /dev/null
+++ b/src/usr/share/libalpm/scripts/kernel-install-mkinitcpio-remove
@@ -0,0 +1,14 @@
+#!/bin/bash -e
+
+while read -r line; do
+    if ! read -r pkgbase > /dev/null 2>&1 < "${line%/vmlinuz}/pkgbase"; then
+        # if the kernel has no pkgbase, we skip it
+        continue
+    fi
+
+    # remove the preset for the package being removed
+    preset="/etc/mkinitcpio.d/${pkgbase}.preset"
+    if [[ -e ${preset} ]]; then
+        rm ${preset}
+    fi
+done