[mod] add Makfile targets for search.checker.<engine_name>

To check all engines:

    make search.checker

To check a engine 'google news' replace space by underline:

    make search.checker.google_news

To see HTTP requests and more use SEARX_DEBUG:

    make SEARX_DEBUG=1 search.checker.google_news

To filter out HTTP redirects:

    make SEARX_DEBUG=1 search.checker.google_news | grep -A1 "HTTP/1.1\" 3[0-9][0-9]"
    ...
    Engine google news                   Checking
    https://news.google.com:443 "GET /search?q=life&hl=en&lr=lang_en&ie=utf8&oe=utf8&ceid=US%3Aen&gl=US HTTP/1.1" 302 0
    https://news.google.com:443 "GET /search?q=life&hl=en-US&lr=lang_en&ie=utf8&oe=utf8&ceid=US:en&gl=US HTTP/1.1" 200 None
    --
    https://news.google.com:443 "GET /search?q=computer&hl=en&lr=lang_en&ie=utf8&oe=utf8&ceid=US%3Aen&gl=US HTTP/1.1" 302 0
    https://news.google.com:443 "GET /search?q=computer&hl=en-US&lr=lang_en&ie=utf8&oe=utf8&ceid=US:en&gl=US HTTP/1.1" 200 None
    --

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

Makefile

@@ -166,6 +166,18 @@ PHONY += gecko.driver
 gecko.driver:
 	$(PY_ENV_ACT); ./manage.sh install_geckodriver
 
+# search.checker
+# --------------
+
+search.checker: pyenvinstall
+	$(Q)$(PY_ENV_ACT); searx-checker -v
+
+ENGINE_TARGETS=$(patsubst searx/engines/%.py,search.checker.%,$(wildcard searx/engines/[!_]*.py))
+
+$(ENGINE_TARGETS): pyenvinstall
+	$(Q)$(PY_ENV_ACT); searx-checker -v "$(subst _, ,$(patsubst search.checker.%,%,$@))"
+
+
 # test
 # ----
 
@@ -180,7 +192,8 @@ PYLINT_FILES=\
 	searx/engines/digg.py \
 	searx/engines/google.py \
 	searx/engines/google_news.py \
-	searx/engines/google_videos.py
+	searx/engines/google_videos.py \
+	searx/engines/google_images.py
 
 test.pylint: pyenvinstall
 	$(call cmd,pylint,$(PYLINT_FILES))