jenkins-helpers.sh: New helper convert_args_to_variables

... to convert "--var val" and "++arr elem" arguments to variables.
Use in tcwg-upstream2gerrit.sh

Change-Id: I88bb8d6b366944626c71727227f12bdd33f7bb55

1 files changed, 45 insertions, 1 deletions

diff --git a/jenkins-helpers.sh b/jenkins-helpers.sh
index ab334d8c..64c330b9 100644
--- a/jenkins-helpers.sh
+++ b/jenkins-helpers.sh
@@ -1,4 +1,4 @@
-#/bin/bash
+#!/bin/bash
 
 # $@: Jenkins labels
 # Prints nodes corresponding to jenkins labels.
@@ -412,3 +412,47 @@ test_array()
 	return 1
     fi
 }
+
+# Process "--var value" and "++arr elem" arguments and define corresponding
+# variables and arrays.
+# "--var value" defines shell variable "$var" to "value".
+# "++arr elem" defines shell array "$arr[@]" and adds "elem" to it.
+# Shell array $CONVERTED_ARGS is set to the arguments processed.
+# Shell variable $SHIFT_CONVERTED_ARGS is set to number of arguments processed.
+# $@: Pairs of def/val arguments, stops at "--" marker.
+convert_args_to_variables ()
+{
+    local name
+    local num="0"
+    eval "CONVERTED_ARGS=()"
+    while [ $# -gt 0 ]; do
+	case "$1" in
+	    "--")
+		# Finish marker
+		num=$(($num+1))
+		shift 1
+		break
+		;;
+	    "--"*)
+		name="${1#--}"
+		eval "$name=\"$2\""
+		num=$(($num+2))
+		;;
+	    "++"*)
+		name="${1#++}"
+		if ! test_array $name; then
+		    eval "$name=()"
+		fi
+		eval "$name+=(\"$2\")"
+		num=$(($num+2))
+		;;
+	    *)
+		echo "ERROR: option does not start with '--' or '++': $1"
+		exit 1
+		;;
+	esac
+	eval "CONVERTED_ARGS+=(\"$1\" \"$2\")"
+	shift 2
+    done
+    eval "SHIFT_CONVERTED_ARGS=$num"
+}