functions: Add test vm functions

* `@testvm::cleanup`: Deletes (after optionally powering off) test VMs
  matching a pattern
* `@testvm::connect`: Connects to test VM using SSH
* `@testvm::delete`: Powers off and deletes a specific test VM
* `@testvm::sftp`: Connects to a test VM using SFTP

functions/@testvm::cleanup

@@ -0,0 +1,27 @@
+# vim: set ft=zsh sw=4 ts=4 sts=4 et :
+
+@testvm::cleanup() {
+    local destroy=false
+    local pattern='^fmos-[a-f0-9]{8}$'
+    while [ $# -gt 0 ]; do
+        case "$1" in
+        --destroy)
+            destroy=true
+            ;;
+        *)
+            pattern="${1}"
+            ;;
+        esac
+        shift
+    done
+    if ${destroy}; then
+        virsh list --name \
+            | awk "/${pattern}/{print}" \
+            | xargs -r -n1 virsh destroy
+    fi
+    virsh list --inactive --name \
+        | awk "/${pattern}/{print}" \
+        | xargs -r -n1 virsh undefine --remove-all-storage --nvram
+}
+
+@testvm::cleanup "$@"

functions/@testvm::connect

@@ -0,0 +1,22 @@
+# vim: set ft=zsh sw=4 ts=4 sts=4 et :
+
+@testvm::connect() {
+    local _term
+    local testvm_domain=${TESTVM_DOMAIN:-dustin.test}
+    local testvm="${1}"
+    shift
+    if [ -z "${SSHPASS}" ]; then
+        export SSHPASS='F!r3m0n1'
+    fi
+    case ${TERM} in
+    [Aa]lacritty)
+        _term=xterm-256color
+        ;;
+    esac
+    if [[ ! "${testvm}" = *.* ]]; then
+        testvm="${testvm}.${testvm_domain}"
+    fi
+    TERM=${_term:-${TERM}} sshpass -e ssh ${testvm} "$@"
+}
+
+@testvm::connect "$@"

functions/@testvm::delete

@@ -0,0 +1,8 @@
+# vim: set ft=zsh sw=4 ts=4 sts=4 et :
+
+@testvm::delete() {
+    virsh destroy "${1}" || :
+    virsh undefine "${1}" --remove-all-storage --nvram
+}
+
+@testvm::delete "$@"

functions/@testvm::sftp

@@ -0,0 +1,17 @@
+# vim: set ft=zsh sw=4 ts=4 sts=4 et :
+
+@testvm::sftp() {
+    local _term
+    local testvm_domain=${TESTVM_DOMAIN:-dustin.test}
+    if [ -z "${SSHPASS}" ]; then
+        export SSHPASS='F!r3m0n1'
+    fi
+    case ${TERM} in
+    Alacritty)
+        _term=xterm-256color
+        ;;
+    esac
+    TERM=${_term:-${TERM}} sshpass -e sftp ${1}.${testvm_domain}${2:+:${2}}
+}
+
+@testvm::sftp "$@"

functions/@vmname

@@ -0,0 +1 @@
+printf 'fmos-%08x\n' $(od -An -tu -N4 /dev/urandom)