Add stdin support to --query parameter

SearchBox-CLI/EmbeddedFiles/Help.txt

@@ -22,7 +22,7 @@ Options:
 	--limit         Limits the number of results returned, -1 = no limit {query}
 	--offset        Skips the specified number of results from the beginning of  results list {query}
 	--old-source    Specifies the path to the old version of the source document update {update}
-	--query         Specifies the query string {query, context}
+	--query         Specifies the query string - set to "-" to use the first line of stdin instead {query, context}
 	--source, -s    Specifies the path to the source document {index, add,context}
 	--tags          Sets the tags to associate with the document. {add, update}
 

SearchBox-CLI/Program.cs

@@ -222,6 +222,11 @@ namespace SearchBoxCLI
 				return 1;
 			}
 
+			// Use the first line of stdin instead of the actual query string if "-" is specified
+			if (Query == "-") {
+				Query = Console.ReadLine().Trim();
+			}
+
 			SearchBox searchBox = JsonConvert.DeserializeObject<SearchBox>(
 				File.ReadAllText(SearchIndexFilepath)
 			);