[PATCH blktests 1/3] check: Add configuration file option

[André Almeida <andrealmeid@xxxxxxxxxxxxx>]

Add an option to be possible to use a different configuration file
rather than the default "config" file.

Signed-off-by: André Almeida <andrealmeid@xxxxxxxxxxxxx>
---
 check | 29 ++++++++++++++++++++++++-----
 1 file changed, 24 insertions(+), 5 deletions(-)

diff --git a/check b/check
index 981058c..936b0c3 100755
--- a/check
+++ b/check
@@ -635,6 +635,9 @@ Test runs:
   -x, --exclude=TEST	 exclude a test (or test group) from the list of
 			 tests to run
 
+  -c, --config=FILE	 use FILE for loading configuration instead of
+			 default 'config' filename.
+
 Miscellaneous:
   -h, --help             display this help message and exit"
 
@@ -650,7 +653,7 @@ Miscellaneous:
 	esac
 }
 
-if ! TEMP=$(getopt -o 'do:q::x:h' --long 'quick::,exclude:,output:,help' -n "$0" -- "$@"); then
+if ! TEMP=$(getopt -o 'do:q::x:c:h' --long 'quick::,exclude:,output:,config:,help' -n "$0" -- "$@"); then
 	exit 1
 fi
 
@@ -659,10 +662,8 @@ unset TEMP
 
 LOGGER_PROG="$(type -P logger)" || LOGGER_PROG=true
 
-if [[ -r config ]]; then
-	# shellcheck disable=SC1091
-	. config
-fi
+# true if the default configuration file "config" should be used
+DEFAULT_CONFIG=true
 
 # Default configuration.
 : "${DEVICE_ONLY:=0}"
@@ -706,6 +707,17 @@ while true; do
 			EXCLUDE+=("$2")
 			shift 2
 			;;
+		'-c'|'--config')
+			if [[ -r "$2" ]]; then
+				# shellcheck source=/dev/null
+				. "$2"
+				DEFAULT_CONFIG=false
+			else
+				echo "Configuration file $2 not found!"
+				usage err
+			fi
+			shift 2
+			;;
 		'-h'|'--help')
 			usage out
 			;;
@@ -719,6 +731,13 @@ while true; do
 	esac
 done
 
+# if '-c' was not used, try to use the default config file
+if [[ -r config ]] && $DEFAULT_CONFIG; then
+	# shellcheck source=/dev/null
+	. config
+fi
+
+
 if [[ $QUICK_RUN -ne 0 && ! "${TIMEOUT:-}" ]]; then
 	_error "QUICK_RUN specified without TIMEOUT"
 fi
-- 
2.23.0