From 42f9b20c255db0f5990c7f6376ec9849ee646310 Mon Sep 17 00:00:00 2001
From: ange <ange@yw5n.com>
Date: Tue, 27 Feb 2024 21:08:33 +0100
Subject: [PATCH] feat: arch

---
 arch/create.sh        | 18 ++++++++++++++++++
 arch/download_isos.sh |  6 ++++++
 arch/lib.sh           | 23 +++++++++++++++++++++++
 arch/run.sh           | 12 ++++++++++++
 4 files changed, 59 insertions(+)
 create mode 100755 arch/create.sh
 create mode 100755 arch/download_isos.sh
 create mode 100644 arch/lib.sh
 create mode 100755 arch/run.sh

diff --git a/arch/create.sh b/arch/create.sh
new file mode 100755
index 0000000..c375e23
--- /dev/null
+++ b/arch/create.sh
@@ -0,0 +1,18 @@
+#!/bin/bash -e
+cd "$(dirname "$0")"
+. ./lib.sh
+
+if [ -f hda.qcow2 ]; then
+    echo -e "Disk file exists. Are you sure you don't want" \
+        "\e[1m\e[31m./run.sh\e[0m?\nCtrl-C to interrupt" >&2
+    read -r
+fi
+
+qemu-img create -f qcow2 hda.qcow2 10G
+
+CMD=(
+    "${CMD[@]}"
+    -drive file=arch.iso,index=1,media=cdrom,readonly=on
+)
+
+"${CMD[@]}"
diff --git a/arch/download_isos.sh b/arch/download_isos.sh
new file mode 100755
index 0000000..39df8b8
--- /dev/null
+++ b/arch/download_isos.sh
@@ -0,0 +1,6 @@
+#!/bin/bash -e
+
+arch=''
+
+curl -LC- \
+    -o arch.iso "$arch"
diff --git a/arch/lib.sh b/arch/lib.sh
new file mode 100644
index 0000000..a320ecd
--- /dev/null
+++ b/arch/lib.sh
@@ -0,0 +1,23 @@
+#!/bin/bash -e
+
+RAM="$(free -g | awk '/^Mem:/{print $2 - 2}')"
+
+if   [ "$RAM" -le  2 ]; then  RAM=2
+elif [ "$RAM" -gt 32 ]; then RAM=32; fi
+
+RAM="${RAM}G"
+
+CMD=(
+    qemu-system-x86_64
+        -accel kvm
+        -M q35
+        # usb
+        -device qemu-xhci
+        -cpu host
+        -m "2G,maxmem=$RAM"
+        -vga virtio
+        #-drive if=virtio,file=hda.qcow2
+        # shared memory
+        -object memory-backend-ram,id=mem,size=2G,share=on
+        -numa node,memdev=mem
+)
diff --git a/arch/run.sh b/arch/run.sh
new file mode 100755
index 0000000..c2c066e
--- /dev/null
+++ b/arch/run.sh
@@ -0,0 +1,12 @@
+#!/bin/bash -e
+cd "$(dirname "$0")"
+. ./lib.sh
+
+CMD=(
+    "${CMD[@]}"
+    -nic user,model=virtio-net-pci
+    # usb passthrough, might need root privileges
+    #-device usb-host,vendorid=0x058f,productid=0x6387
+)
+
+"${CMD[@]}"