Add AppImage builder

.hgignore

@@ -1,3 +1,6 @@
 ^snap/love-prepared/
 ^snap/love_.*\.snap$
 ^tarball/love-.*\.tar\.gz$
+^appimage/love-prepared/
+^appimage/.*\.AppImage$
+^appimage/AppRun$

README.md

@@ -20,4 +20,11 @@ to do everything for you, why not just do it manually?! Seriously though, you
 can still use snapcraft to build this, but at that point it just acts like a
 fancy mksquashfs, and an extra dependency at that.
 
+## appimage ##
+`appimage` builds [AppImages][AppImage], unsurprisingly. It uses binaries from
+[AppImageKit][], though you can build them yourself if you want to. And hey,
+this actually seems to work, too!
+
 [snap]: http://snapcraft.io/
+[AppImage]: http://appimage.org/
+[AppImageKit]: https://github.com/probonopd/AppImageKit

appimage/build.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+
+set -eo >/dev/null
+
+if [[ $# -lt 1 ]]; then
+	echo "Usage: $0 <version>"
+	exit 0
+fi
+
+VERSION="$1"
+if ! test -f ../tarball/love-${VERSION}-amd64.tar.gz; then
+	echo "No tarball found for $VERSION"
+	exit 1
+fi
+
+download_if_needed() {
+	if ! test -f "$1"; then
+		if ! curl -L -o "$1" https://github.com/probonopd/AppImageKit/releases/download/continuous/"$1"; then
+			echo "Failed to download appimagetool"
+			echo "Please supply it manually"
+			exit 1
+		fi
+		chmod +x "$1"
+	fi
+}
+
+download_if_needed appimagetool-x86_64.AppImage
+download_if_needed AppRun
+
+# Extract the tarball build into a folder
+rm -rf love-prepared
+mkdir love-prepared
+tar xf ../tarball/love-${VERSION}-amd64.tar.gz -C love-prepared --strip-components=1
+
+cd love-prepared
+
+# Add our small wrapper script (yay, more wrappers), and AppRun
+cp ../wrapper usr/bin/wrapper-love
+cp ../AppRun .
+
+# Add our desktop file
+sed -e 's/%BINPREFIX%/wrapper-/' -e 's/%ICONPREFIX%//' love.desktop.in > love.desktop
+rm love.desktop.in
+
+# Add a DirIcon
+cp love.svg .DirIcon
+
+# Now build the final AppImage
+cd ..
+./appimagetool-x86_64.AppImage love-prepared love-${VERSION}-x86_64.AppImage

appimage/wrapper

@@ -0,0 +1,4 @@
+#!/bin/sh
+
+# For some reason this runs from the usr subdirectory
+exec ../love "$@"