newvm: Add script to run virt-install

For the longest time, whenever I needed to create a new virtual machine,
I just used `Ctrl+R` to find the last `virt-install` command I had run
and tweaked it for the new machine.  At some point, my `~/.zsh_history`
overflowed, though, so the command I had been running got lost.  To
avoid this silliness in the future, I've created a script that runs
`virt-manager` for me.  As a bonus, it has some configuration flags for
the parameters that often vary between machines.  For most machines,
though, the script can be run as simply as `newvm.sh name`.

newvm.sh

@@ -0,0 +1,136 @@
+#!/bin/sh
+# vim: set sw=4 ts=4 sts=4 et :
+
+memory=2048
+vcpus=2
+disk_size=16
+kickstart=http://rosalina.pyrocufflink.blue/~dustin/kickstart/fedora.ks
+fedora=$(rpm -E %fedora)
+network=network=prod
+console=true
+
+usage() {
+    printf 'usage: %s [options] name\n' "${0##*/}"
+}
+
+while [ $# -gt 0 ]; do
+    case "$1" in
+    --kickstart)
+        shift
+        kickstart="$1"
+        ;;
+    --kickstart=*)
+        kickstart="${1##*=}"
+        ;;
+    --memory)
+        shift
+        memory="$1"
+        ;;
+    --memory=*)
+        memory="${1#*=}"
+        ;;
+    --vcpus)
+        shift
+        vcpus="$1"
+        ;;
+    --vcpus=*)
+        vcpus="${1#*=}"
+        ;;
+    --location)
+        shift
+        location="$1"
+        ;;
+    --location=*)
+        location="${1#*=}"
+        ;;
+    --disk-size)
+        shift
+        disk_size="$1"
+        ;;
+    --disk=size=*)
+        disk_size="${1#*=}"
+        ;;
+    --fedora)
+        shift
+        fedora="$1"
+        ;;
+    --fedora=*)
+        shift
+        fedora="${1#*=}"
+        ;;
+    --no-console|--noconsole)
+        console=false
+        ;;
+    --)
+        shift
+        break
+        ;;
+    *)
+        if [ -z "${name}" ]; then
+            name="$1"
+        else
+            usage >&2
+            exit 2
+        fi
+    esac
+    shift
+done
+
+if [ -z "${name}" ]; then
+    usage >&2
+    exit 2
+fi
+
+if [ -z "${LIBVIRT_DEFAULT_URI}" ]; then
+    printf 'LIBVIRT_DEFAULT_URI is not set.\n' >&2
+    printf 'If you want to create a new VM locally, explicitly set '
+    printf 'LIBVIRT_DEFAULT_URI=qemu:///session\n'
+    exit 1
+fi
+
+printf 'Creating %s on %s\n' "${name}" "${LIBVIRT_DEFAULT_URI}"
+
+if [ -z "${location}" ]; then
+    location=http://dl.fedoraproject.org/pub/fedora/linux/releases/${fedora}/Everything/x86_64/os
+fi
+
+if [ -z ${http_proxy+on} ]; then
+    export http_proxy=http://proxy.pyrocufflink.blue:3128
+    printf 'Using default HTTP proxy: %s\n' "${http_proxy}" >&2
+elif [ -z "${http_proxy}" ]; then
+    printf 'HTTP proxy disabled\n' "${http_proxy}" >&2
+else
+    printf 'Using HTTP proxy: %s\n' "${http_proxy}" >&2
+fi
+
+extra_args="ip=::::${name}::dhcp inst.ks=${kickstart}"
+if [ -n "${http_proxy}" ]; then
+    extra_args="${extra_args} inst.proxy=${http_proxy}"
+    if [ ${fedora} -lt 40 ]; then
+        extra_args="${extra_args} proxy=${http_proxy}"
+    fi
+fi
+extra_args="${extra_args} inst.notmux quiet systemd.show_status=1 console=ttyS0"
+
+set -- \
+    --name ${name} \
+    --memory ${memory} \
+    --cpu host \
+    --location ${location} \
+    --extra-args "${extra_args}" \
+    --disk pool=default,size=${disk_size},cache=none \
+    --network ${network} \
+    --os-variant fedora$(rpm -E %fedora) \
+    --sound none \
+    --redirdev none \
+    --rng /dev/random \
+    --boot uefi \
+    "$@"
+
+if $console; then
+    set -- "$@" --autoconsole text
+else
+    set -- "$@" --noautoconsole --wait -1
+fi
+
+exec virt-install "$@"