[FEATURE] Create linux AppImage for building CCExtractor

linux/build_appimage.sh

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+#!/bin/bash
+
+set -x
+set -e
+
+# store the path of where the script is
+OLD_CWD=$(readlink -f .)
+
+# store repo root as variable
+REPO_ROOT=$(dirname $OLD_CWD)
+
+# Make a temp directory for building stuff which will be cleaned automatically
+BUILD_DIR="$OLD_CWD/temp"
+
+# Check if temp directory exist, and if so then remove contents from it
+# if not then create temp directory
+if [ -d "$BUILD_DIR" ]; then
+	rm -r "$BUILD_DIR/*" | true
+else
+	mkdir -p "$BUILD_DIR"
+fi
+
+# make sure to clean up build dir, even if errors occur
+cleanup() {
+	if [ -d "$BUILD_DIR" ]; then
+		rm -rf "$BUILD_DIR"
+	fi
+}
+
+# Automatically trigger Cleanup function
+trap cleanup EXIT
+
+# switch to build dir
+pushd "$BUILD_DIR"
+
+# configure build files with CMake
+# we need to explicitly set the install prefix, as CMake's default is /usr/local for some reason...
+cmake "$REPO_ROOT/src"
+
+# build project and install files into AppDir
+make -j$(nproc) ENABLE_OCR=yes
+
+# download linuxdeploy tool
+wget https://github.com/linuxdeploy/linuxdeploy/releases/download/continuous/linuxdeploy-x86_64.AppImage
+
+# make them executable
+chmod +x linuxdeploy*.AppImage
+
+# Create AppDir
+mkdir -p "$BUILD_DIR/AppDir"
+
+# Link of CCExtractor image of any of these resolution(8x8, 16x16, 20x20, 22x22, 24x24, 28x28, 32x32, 36x36, 42x42,
+# 48x48, 64x64, 72x72, 96x96, 128x128, 160x160, 192x192, 256x256, 384x384, 480x480, 512x512) in png extension
+PNG_LINK="https://ccextractor.org/images/ccextractor.png"
+
+# Download the image and put it in AppDir
+wget "$PNG_LINK" -P AppDir
+
+# now, build AppImage using linuxdeploy
+./linuxdeploy-x86_64.AppImage --appdir=AppDir -e ccextractor --create-desktop-file --output appimage -i AppDir/ccextractor.png
+
+# Move resulted AppImage binary to base directory
+mv ccextractor*.AppImage "$OLD_CWD"