scripts/make-icons: fix command check for convert

INSTALL.md

@@ -0,0 +1,45 @@
+# Installation
+
+## Windows
+
+The installer includes ninfs and WinFsp. This is the easiest way to use the application.
+
+The standalone release can be downloaded as **ninfs-(version)-win32.zip** below the notes. Extract and run `ninfsw.exe` (or `ninfs.exe` to have a console attached).
+
+ninfs can also be used as a Python module below.
+
+## macOS
+
+macOS users need [macFUSE](https://osxfuse.github.io) or [fuse-t](https://www.fuse-t.org).
+
+The standalone release can be downloaded as **ninfs-(version)-macos.dmg** below the notes. Open the disk image, optionally copy to the Applications folder, and run ninfs.
+
+ninfs can also be used as a Python module below.
+
+## Linux
+
+Install as a pip module like below. To use the gui, make sure tkinter is installed. This is `python3-tk` on Debian/Ubuntu and `python3-tkinter` on Fedora.
+
+Arch Linux: (AUR git package still needs updates, please wait...)
+
+## BSD/etc.
+
+No idea. It might work! I would like to make sure ninfs works on these systems too, so feel free to file issues or make PRs for compatibility with BSD or other systems that support libfuse.
+
+fusepy should support FreeBSD and OpenBSD. For anything else you should consider adding support to [refuse](https://github.com/pleiszenburg/refuse).
+
+# Python module installation
+
+Python 3.6.1 or later is required. [ninfs on PyPI](https://pypi.org/project/ninfs/)
+
+* Windows: `py -3 -mpip install --user ninfs`
+  * Note that Python installed from the Microsoft Store does not work due to sandboxing restrictions.
+* macOS and Linux: `python3 -mpip install --user ninfs`
+
+To install a specific version, add `==(version)` to the end (e.g. `pip install --user ninfs==2.0a11`)
+
+------
+
+# A little something extra...
+
+If my tools have helped you in some way then please consider supporting me on [Patreon](https://patreon.com/ihaveahax), [PayPal](https://paypal.me/ihaveamac), or [Ko-Fi](https://ko-fi.com/ihaveahax).

scripts/make-icons.sh

@@ -1,9 +1,10 @@
 #!/bin/sh
 
 # check for imagemagick
-if ! convert > /dev/null 2>&1; then
+#if ! convert > /dev/null 2>&1; then
+if ! command -v convert &> /dev/null; then
   echo "convert not found, please install ImageMagick"
-  exit
+  exit 1
 fi
 
 if [ "$(uname -s)" = Darwin ]; then