#!/usr/bin/make -f
ifeq (beta,$(MAKECMDGOALS))
product=-beta
else
ifeq (nightly,$(MAKECMDGOALS))
product=-nightly
else
ifeq (stable,$(MAKECMDGOALS))
product=
else
ifeq (,$(MAKECMDGOALS))
product=
else
$(error Incorrect target specified.  Specify at most one argument of "beta", "nightly", or "stable")
endif
endif
endif
endif

sudo != printf '%s\n' $$(groups) | grep -F sudo

.DEFAULT_GOAL = install
ifeq (0,$(shell id -u))
ROOT_INSTALL = y
else
ifneq (,$(sudo))
ROOT_INSTALL = y
.DEFAULT_GOAL = install-sudo
endif
endif

ifdef ROOT_INSTALL
optdir=/opt
bindir=/usr/local/bin
applications_dir=/usr/share/applications
alternatives=alternatives
else
optdir=$(HOME)/.local/opt
bindir=$(HOME)/.local/bin
applications_dir=$(HOME)/.local/share/applications
alternatives=

$(warning Warning: You are not root.  Installing into $(optdir))
endif

os=linux64
lang=en-US
orig_url="https://download.mozilla.org/?product=firefox$(product)-latest-ssl&os=$(os)&lang=$(lang)"

url := $(shell curl -sI $(orig_url) | sed -n 's/^Location: //p')
$(if $(url),,$(error Could not determine url.  orig_url=$(orig_url)))

# Use a path that only trusted users can write into.  So not /tmp.
dldir=$(optdir)

tarball=$(dldir)/$(notdir $(url))
destdir=$(optdir)/$(notdir $(tarball:.tar.bz2=))
tempdir=$(destdir)~tmp

symlink=$(optdir)/firefox
desktop_file=$(applications_dir)/firefox.desktop
bin_symlink=$(bindir)/firefox

install_targets = $(symlink) $(bin_symlink) $(alternatives)
.PHONY: install beta nightly stable $(install_targets)
ifndef UPDATE
# 'sudo make UPDATE=y' is suitable to run from cron (no output if nothing
# changed upstream)
install: $(install_targets)
install-sudo:
	$(sudo) $(MAKE) $(MAKEFLAGS) $(MAKECMDGOALS)
else
install-sudo:
	@$(sudo) $(MAKE) $(MAKEFLAGS) $(MAKECMDGOALS)
maybe_symlink != [ "$$(readlink $(symlink))" != "$(notdir $(destdir))" ] && printf '%%s\n' "$$(symlink)"
install: $(maybe_symlink)
	@:
endif

$(bin_symlink):
	mkdir -p $(dir $@)
	ln -sf $(optdir)/firefox/firefox $(dir $@)

alternatives:
	update-alternatives --install /usr/bin/x-www-browser x-www-browser $(optdir)/firefox/firefox 200
	update-alternatives --set x-www-browser $(optdir)/firefox/firefox

$(desktop_file):
	: write file $@ $(file >$@,$(desktop_file_contents))
ifdef ROOT_INSTALL
	if command -v update-desktop-database; then update-desktop-database; fi
endif

$(symlink): $(destdir)
	ln -srnf $(destdir) $@

beta nightly stable: $(.DEFAULT_GOAL)

$(destdir): $(tarball)
	mkdir -p $(tempdir)
	tar -C $(tempdir) --strip-components=1 -jxf $<
	mv -T $(tempdir) $(destdir)
	@rm $(tarball) || true

.INTERMEDIATE: $(tarball)

$(tarball):
	mkdir -p $(dir $@)
	curl -C- -o $@.partial $(url)
	mv $@.partial $@

FIREFOX_DIR=$(optdir)/firefox
FIREFOX_EXEC=$(FIREFOX_DIR)/firefox
FIREFOX_ICON=$(FIREFOX_DIR)/browser/chrome/icons/default/default128.png

define desktop_file_contents
[Desktop Entry]
Name=Firefox
Name[bg]=Firefox
Name[ca]=Firefox
Name[cs]=Firefox
Name[el]=Firefox
Name[es]=Firefox
Name[fa]=Firefox
Name[fi]=Firefox
Name[fr]=Firefox
Name[hu]=Firefox
Name[it]=Firefox
Name[ja]=Firefox
Name[ko]=Firefox
Name[nb]=Firefox
Name[nl]=Firefox
Name[nn]=Firefox
Name[no]=Firefox
Name[pl]=Firefox
Name[pt]=Firefox
Name[pt_BR]=Firefox
Name[ru]=Firefox
Name[sk]=Firefox
Name[sv]=Firefox
Comment=Browse the World Wide Web
Comment[bg]=Сърфиране в Мрежата
Comment[ca]=Navegueu per el web
Comment[cs]=Prohlížení stránek World Wide Webu
Comment[de]=Im Internet surfen
Comment[el]=Περιηγηθείτε στον παγκόσμιο ιστό
Comment[es]=Navegue por la web
Comment[fa]=صفحات شبکه جهانی اینترنت را مرور نمایید
Comment[fi]=Selaa Internetin WWW-sivuja
Comment[fr]=Navigue sur Internet
Comment[hu]=A világháló böngészése
Comment[it]=Esplora il web
Comment[ja]=ウェブを閲覧します
Comment[ko]=웹을 돌아 다닙니다
Comment[nb]=Surf på nettet
Comment[nl]=Verken het internet
Comment[nn]=Surf på nettet
Comment[no]=Surf på nettet
Comment[pl]=Przeglądanie stron WWW 
Comment[pt]=Navegue na Internet
Comment[pt_BR]=Navegue na Internet
Comment[ru]=Обозреватель Всемирной Паутины
Comment[sk]=Prehliadanie internetu
Comment[sv]=Surfa på webben
GenericName=Web Browser
GenericName[bg]=Интернет браузър
GenericName[ca]=Navegador web
GenericName[cs]=Webový prohlížeč
GenericName[de]=Webbrowser
GenericName[el]=Περιηγητής ιστού
GenericName[es]=Navegador web
GenericName[fa]=مرورگر اینترنتی
GenericName[fi]=WWW-selain
GenericName[fr]=Navigateur Web
GenericName[hu]=Webböngésző
GenericName[it]=Browser Web
GenericName[ja]=ウェブ・ブラウザ
GenericName[ko]=웹 브라우저
GenericName[nb]=Nettleser
GenericName[nl]=Webbrowser
GenericName[nn]=Nettlesar
GenericName[no]=Nettleser
GenericName[pl]=Przeglądarka WWW
GenericName[pt]=Navegador Web
GenericName[pt_BR]=Navegador Web
GenericName[ru]=Интернет-браузер
GenericName[sk]=Internetový prehliadač
GenericName[sv]=Webbläsare
X-GNOME-FullName=Firefox Web Browser
X-GNOME-FullName[bg]=Интернет браузър (Firefox)
X-GNOME-FullName[ca]=Navegador web Firefox
X-GNOME-FullName[cs]=Firefox Webový prohlížeč
X-GNOME-FullName[el]=Περιηγήτης Ιστού Firefox
X-GNOME-FullName[es]=Navegador web Firefox
X-GNOME-FullName[fa]=مرورگر اینترنتی Firefox
X-GNOME-FullName[fi]=Firefox-selain
X-GNOME-FullName[fr]=Navigateur Web Firefox
X-GNOME-FullName[hu]=Firefox webböngésző
X-GNOME-FullName[it]=Firefox Browser Web
X-GNOME-FullName[ja]=Firefox ウェブ・ブラウザ
X-GNOME-FullName[ko]=Firefox 웹 브라우저
X-GNOME-FullName[nb]=Firefox Nettleser
X-GNOME-FullName[nl]=Firefox webbrowser
X-GNOME-FullName[nn]=Firefox Nettlesar
X-GNOME-FullName[no]=Firefox Nettleser
X-GNOME-FullName[pl]=Przeglądarka WWW Firefox
X-GNOME-FullName[pt]=Firefox Navegador Web
X-GNOME-FullName[pt_BR]=Navegador Web Firefox
X-GNOME-FullName[ru]=Интернет-браузер Firefox
X-GNOME-FullName[sk]=Internetový prehliadač Firefox
X-GNOME-FullName[sv]=Webbläsaren Firefox
Exec=$(FIREFOX_EXEC) %u
Terminal=false
X-MultipleArgs=false
Type=Application
Icon=$(FIREFOX_ICON)
Categories=Network;WebBrowser;
MimeType=text/html;text/xml;application/xhtml+xml;application/xml;application/vnd.mozilla.xul+xml;application/rss+xml;application/rdf+xml;image/gif;image/jpeg;image/png;x-scheme-handler/http;x-scheme-handler/https;
StartupWMClass=Firefox
StartupNotify=true
endef