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From 852917d99cda518917343bb9546a1867775379c6 Mon Sep 17 00:00:00 2001
From: Luca Stefani <luca.stefani.ge1@gmail.com>
Date: Sun, 26 Jul 2020 12:33:33 +0200
Subject: [PATCH] mkinitcpio: Add support for the zstd compressor
---
PKGBUILD | 1 +
lsinitcpio | 4 ++++
man/mkinitcpio.conf.5.txt | 6 ++++--
mkinitcpio | 3 +++
mkinitcpio.conf | 1 +
5 files changed, 13 insertions(+), 2 deletions(-)
diff --git a/PKGBUILD b/PKGBUILD
index 3536a48..c7e1ed5 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -15,6 +15,7 @@ optdepends=('xz: Use lzma or xz compression for the initramfs image'
'bzip2: Use bzip2 compression for the initramfs image'
'lzop: Use lzo compression for the initramfs image'
'lz4: Use lz4 compression for the initramfs image'
+ 'zstd: Use zstd compression for the initramfs image'
'mkinitcpio-nfs-utils: Support for root filesystem on NFS')
backup=(etc/mkinitcpio.conf)
diff --git a/lsinitcpio b/lsinitcpio
index bcb4a19..4715783 100755
--- a/lsinitcpio
+++ b/lsinitcpio
@@ -113,6 +113,10 @@ detect_filetype() {
echo 'lz4 -l'
return
;;
+ fd2fb528)
+ echo 'zstd'
+ return
+ ;;
esac
read -rd '' bytes < <(hexdump -n 3 -e '"%c"' "$1")
diff --git a/man/mkinitcpio.conf.5.txt b/man/mkinitcpio.conf.5.txt
index 9c8d000..fe4d077 100644
--- a/man/mkinitcpio.conf.5.txt
+++ b/man/mkinitcpio.conf.5.txt
@@ -54,8 +54,10 @@ Variables
Defines a program to filter the generated image through. As of linux 2.6.38,
the kernel understands the compression formats yielded by the *gzip*, *bzip2*,
- *lz4*, *lzop*, *lzma*, and *xz* compressors. If unspecified, this setting
- defaults to *gzip* compression. In order to create an uncompressed image, define
+ *lz4*, *lzop*, *lzma*, and *xz* compressors. As of linux 5.9 the kernel also
+ understands the compression formats yielded by the *zstd* compressor.
+ If unspecified, this setting defaults to *gzip* compression.
+ In order to create an uncompressed image, define
this variable as *cat*.
+
It's not hard to realize that a filter such as a *tac* or *rev* will cause
diff --git a/mkinitcpio b/mkinitcpio
index ba27433..a9706d0 100755
--- a/mkinitcpio
+++ b/mkinitcpio
@@ -211,6 +211,9 @@ build_image() {
lz4)
COMPRESSION_OPTIONS+=('-l')
;;
+ zstd)
+ COMPRESSION_OPTIONS+=('-19')
+ ;;
esac
pushd "$BUILDROOT" >/dev/null
diff --git a/mkinitcpio.conf b/mkinitcpio.conf
index b926b90..ba1cce3 100644
--- a/mkinitcpio.conf
+++ b/mkinitcpio.conf
@@ -60,6 +60,7 @@ HOOKS=(base udev autodetect modconf block filesystems keyboard fsck)
#COMPRESSION="xz"
#COMPRESSION="lzop"
#COMPRESSION="lz4"
+#COMPRESSION="zstd"
# COMPRESSION_OPTIONS
# Additional options for the compressor
|