Add generic Linux package (koreader#9351)

Relates to koreader#9268
Requires koreader/koreader-base#1504

Usage: 
- `kodev release linux` for native package (same arch as host)
- `LINUX_ARCH=arm release linux` for armhf on a x86_64 host.
- `LINUX_ARCH=arm64 release linux` for arm64 on a x86_64 host.

It produces a `koreader-linux-$ARCH-$VERSION.tar.xz` archive, where $ARCH follows `uname -m` convention {x86_64, armv7l, aarch64}

To generate the debian package from the generic archive the following command is required

`./platform/linux/do_debian_package.sh path_to.tar.xz`

Makefile

@@ -12,7 +12,7 @@ endif
 
 # releases do not contain tests and misc data
 IS_RELEASE := $(if $(or $(EMULATE_READER),$(WIN32)),,1)
-IS_RELEASE := $(if $(or $(IS_RELEASE),$(APPIMAGE),$(DEBIAN),$(MACOS)),1,)
+IS_RELEASE := $(if $(or $(IS_RELEASE),$(APPIMAGE),$(LINUX),$(MACOS)),1,)
 
 ifeq ($(ANDROID_ARCH), arm64)
 	ANDROID_ABI?=arm64-v8a
@@ -29,6 +29,17 @@ endif
 ANDROID_VERSION?=$(shell git rev-list --count HEAD)
 ANDROID_NAME?=$(VERSION)
 
+LINUX_ARCH?=native
+ifeq ($(LINUX_ARCH), native)
+	LINUX_ARCH_NAME:=$(shell uname -m)
+else ifeq ($(LINUX_ARCH), arm64)
+	LINUX_ARCH_NAME:=aarch64
+else ifeq ($(LINUX_ARCH), arm)
+	LINUX_ARCH_NAME:=armv7l
+endif
+LINUX_ARCH_NAME?=$(LINUX_ARCH)
+
+
 MACHINE=$(TARGET_MACHINE)
 ifdef KODEBUG
 	MACHINE:=$(MACHINE)-debug

kodev

@@ -154,10 +154,7 @@ SUPPORTED_TARGETS="
     pocketbook
     ubuntu-touch
     appimage
-    debian          Debian package for current arch
-    debian-armel    Debian package for generic armel devices
-    debian-armhf    Debian package for generic armhf devices
-    debian-arm64    Debian package for generic 64 bits arm devices
+    linux
     macos           MacOS app bundle. You need a mac to build this package
     emu             (*default) If no TARGET is given, assume emulator
     win32
@@ -268,20 +265,8 @@ ${SUPPORTED_TARGETS}"
             make TARGET=appimage
             assert_ret_zero $?
             ;;
-        debian)
-            make TARGET=debian
-            assert_ret_zero $?
-            ;;
-        debian-armel)
-            make TARGET=debian-armel
-            assert_ret_zero $?
-            ;;
-        debian-armhf)
-            make TARGET=debian-armhf
-            assert_ret_zero $?
-            ;;
-        debian-arm64)
-            make TARGET=debian-arm64
+        linux)
+            make TARGET=linux
             assert_ret_zero $?
             ;;
         macos)
@@ -389,17 +374,8 @@ ${SUPPORTED_TARGETS}"
         appimage)
             make TARGET=appimage clean
             ;;
-        debian)
-            make TARGET=debian clean
-            ;;
-        debian-armel)
-            make TARGET=debian-armel clean
-            ;;
-        debian-armhf)
-            make TARGET=debian-armhf clean
-            ;;
-        debian-arm64)
-            make TARGET=debian-arm64 clean
+        linux)
+            make TARGET=linux clean
             ;;
         macos)
             is_mac
@@ -540,21 +516,9 @@ ${SUPPORTED_RELEASE_TARGETS}"
             kodev-build appimage
             make TARGET=appimage update
             ;;
-        debian)
-            kodev-build debian
-            make TARGET=debian update
-            ;;
-        debian-armel)
-            kodev-build debian-armel
-            make TARGET=debian-armel update
-            ;;
-        debian-armhf)
-            kodev-build debian-armhf
-            make TARGET=debian-armhf update
-            ;;
-        debian-arm64)
-            kodev-build debian-arm64
-            make TARGET=debian-arm64 update
+        linux)
+            kodev-build linux
+            make TARGET=linux update
             ;;
         macos)
             is_mac

make/linux.mk

@@ -0,0 +1,34 @@
+LINUX_DIR = $(PLATFORM_DIR)/linux
+LINUX_PACKAGE:=koreader-linux-$(LINUX_ARCH_NAME)$(KODEDUG_SUFFIX)-$(VERSION).tar.xz
+
+update: all
+	mkdir -pv \
+		$(INSTALL_DIR)/linux/bin \
+		$(INSTALL_DIR)/linux/lib \
+		$(INSTALL_DIR)/linux/share/pixmaps \
+		$(INSTALL_DIR)/linux/share/applications \
+		$(INSTALL_DIR)/linux/share/doc/koreader \
+		$(INSTALL_DIR)/linux/share/man/man1
+	cp -pv resources/koreader.png $(INSTALL_DIR)/linux/share/pixmaps
+	cp -pv $(LINUX_DIR)/koreader.desktop $(INSTALL_DIR)/linux/share/applications
+	cp -pv $(LINUX_DIR)/copyright COPYING $(INSTALL_DIR)/linux/share/doc/koreader
+	cp -pv $(LINUX_DIR)/koreader.sh $(INSTALL_DIR)/linux/bin/koreader
+	cp -Lr $(INSTALL_DIR)/koreader $(INSTALL_DIR)/linux/lib
+	gzip -cn9 $(LINUX_DIR)/koreader.1 > $(INSTALL_DIR)/linux/share/man/man1/koreader.1.gz
+	chmod 644 \
+		$(INSTALL_DIR)/linux/share/doc/koreader/copyright \
+		$(INSTALL_DIR)/linux/share/man/man1/koreader.1.gz
+	rm -rf \
+		$(INSTALL_DIR)/linux/lib/koreader/{ota,cache,clipboard,screenshots,spec,tools,resources/fonts,resources/icons/src}
+
+	# remove leftovers
+	find $(INSTALL_DIR)/linux -type f \( -name ".git" -o -name ".gitignore" -o -name "discovery2spore" -o -name "wadl2spore" -o -name "*.txt" -o -name "LICENSE*" -o -name "NOTICE" -o -name "README.md" \) -print0 | xargs -0 rm -rf
+	find $(INSTALL_DIR)/linux -type d \( -name "test" -o -name ".github" \) -print0 | xargs -0 rm -rf
+
+	# fix permissions
+	chmod -R u=rwX,og=rX $(INSTALL_DIR)/linux
+	XZ_OPT=9 tar -C $(INSTALL_DIR)/linux -cvJf $(LINUX_PACKAGE) .
+
+	rm -rf $(INSTALL_DIR)/linux
+
+.PHONY: update