README.md

@@ -47,7 +47,8 @@ need it
 - `bash` - the `qemush` interpreter
 - `coreutils` - used for basic OS operations
 - `sudo` - execute commands as `qemu`
-- `socat` - monitor machines via Unix sockets
+- `source-highlight` - for syntax highlighting when displaying launching
+scripts
 - `diskpath` and `sockpath` - see [Installation
 instructions](#installation-instructions)
 - any text editor - used for builtin function to edit launching scripts

bin/qemush

@@ -15,14 +15,24 @@ exec_as() {
 # Exec the script as qemu
 exec_as qemu "$@"
 
+# Directories used in the program
+bin="${HOME}/launchers"
+images="${HOME}/disks"
+sockets="${HOME}/sockets"
+
 # Environment
-PATH="${HOME}/launchers:${HOME}/bin:${PATH}"
+PATH="${bin}:${HOME}/bin:${PATH}"
 EDITOR="${EDITOR:-nvim}"
 export QEMUSH_NAME
 
 # Aliases
 alias ls='ls --color=auto'
 alias exec='exec '
+if [ -t 1 ]; then
+    alias pretty_cat='source-highlight --failsafe -f esc --style-file=esc.style -i'
+else
+    alias pretty_cat=cat
+fi
 shopt -s expand_aliases
 
 # Set a restrictive umask to make sure qemu user files are private
@@ -36,7 +46,7 @@ perror() {
 # Function to show the usage
 public_help() {
     local name
-    name=$(basename "$0")
+    name="$(basename "$0")"
 
     exec cat << EOF
 ${name}: usage:
@@ -66,11 +76,9 @@ error_usage() {
 # Function to start a virtual machine
 public_start() {
     QEMUSH_NAME="$1"
+    shift
 
-    if ! "$@"; then
-        perror "error launching virtual machine \"${QEMUSH_NAME}\""
-        return 2
-    fi
+    "$QEMUSH_NAME" "$@" || perror "error launching virtual machine \"${QEMUSH_NAME}\""
 }
 
 # Attach to a running virtual machine output, the latest opened if no
@@ -84,22 +92,21 @@ public_watch() {
 
 # List running virtual machines
 public_active() {
-    cd || return
     echo "Running machines:"
-    exec ls -t sockets
+    exec ls -t "$sockets"
 }
 
 # List available virtual machines entrypoints
 public_ls() {
-    cd || return
     echo "Available machines:"
-    exec ls launchers
+    exec ls "$bin"
 }
 
 # Create a copy-on-write disk for a virtual machine
 public_diskadd() {
     QEMUSH_NAME="$1"
     shift
+
     exec qemu-img create -f qcow2 "$(diskpath)" "$1"
 }
 
@@ -107,29 +114,26 @@ public_diskadd() {
 public_diskrm() {
     QEMUSH_NAME="$1"
     shift
+
     exec rm -vi -- "$(diskpath)"
 }
 
 # List available disks
 public_diskls() {
-    cd || return
     echo "Available disks:"
-    exec ls disks
+    exec ls "$images"
 }
 
 # Edit a virtual machine entrypoint with a text editor
 public_edit() {
-    cd || return
-    local file="launchers/${1}"
-
+    local file="${bin}/${1}"
     "$EDITOR" "$file"
     [ -f "$file" ] && exec chmod u+x "$file"
 }
 
 # Delete a virtual machine entrypoint
 public_rm() {
-    cd || return
-    exec rm -vi -- "launchers/${1}"
+    exec rm -vi -- "${bin}/${1}"
 }
 
 # Invoke bash as qemu user in its home directory
@@ -141,7 +145,7 @@ public_shell() {
 # Output the content of an entrypoint, with coloration if on a virtual
 # terminal
 public_cat() {
-    cat "launchers/${1}"
+    pretty_cat "${bin}/${1}"
 }
 
 # Copy a file in entrypoints folder
@@ -150,15 +154,9 @@ public_add() {
     set -e
 
     local name
-    if [ -n "$2" ]; then
-        name="$2"
-    else
-        name=$(basename "$1")
-    fi
-    name="${HOME}/launchers/${name}"
-
-    cp -vi -- "$1" "$name"
-    chmod 740 "$name"
+    name="${2:-$(basename "$1")}"
+    cp -v -i -- "$1" "${bin}/${2}"
+    chmod 740 "${bin}/${name}"
 
     set +e
     trap - EXIT