Switch to the newer cl-csv API.

Thanks to the work at AccelerationNet/cl-csv#12 we
can now use the main branch of cl-csv again.

Makefile

@@ -21,7 +21,7 @@ docs:
 	git clone https://github.com/qitab/qmynd.git $@
 
 ~/quicklisp/local-projects/cl-csv:
-	git clone -b empty-strings-and-nil https://github.com/dimitri/cl-csv.git $@
+	git clone https://github.com/AccelerationNet/cl-csv.git $@
 
 postmodern: ~/quicklisp/local-projects/Postmodern ;
 qmynd: ~/quicklisp/local-projects/qmynd ;

src/sources/csv.lisp

@@ -26,7 +26,7 @@
 	        :initform cl-csv:*quote-escape*)
    (trim-blanks :accessor csv-trim-blanks ; CSV blank and NULLs
 		:initarg :trim-blanks	  ;
-		:initform cl-csv:*trim-blanks*))
+		:initform t))
   (:documentation "pgloader CSV Data Source"))
 
 (defmethod initialize-instance :after ((csv copy-csv) &key)
@@ -98,7 +98,9 @@
 				    :separator (csv-separator csv)
 				    :quote (csv-quote csv)
 				    :escape (csv-escape csv)
-				    :trim-blanks (csv-trim-blanks csv))
+                                    :unquoted-empty-string-is-nil t
+                                    :quoted-empty-string-is-nil nil
+				    :trim-outer-whitespace (csv-trim-blanks csv))
 		 ((or cl-csv:csv-parse-error type-error) (condition)
 		   (progn
 		     (log-message :error "~a" condition)

test/csv-empty-as-null.load → test/csv-keep-extra-blanks.load

@@ -17,4 +17,4 @@ LOAD CSV
 "unquoted blanks",    ,"should be null"
 "unquoted string",no quote,"should be 'no quote'"
 "quoted separator","a,b,c","should be 'a,b,c'"
-"keep extra blanks",  test string  , "should be '  test string  '"
+"keep extra blanks",  test string  , "should be an error"

test/csv-trim-extra-blanks.load

@@ -0,0 +1,20 @@
+LOAD CSV
+    FROM INLINE
+    INTO postgresql:///pgloader?nulls (f1, f2, f3)
+    WITH truncate,
+    	 trim unquoted blanks,
+         fields optionally enclosed by '"',
+         fields escaped by double-quote,
+         fields terminated by ','
+
+  BEFORE LOAD DO
+   $$ drop table if exists nulls; $$,
+   $$ create table if not exists nulls (id serial, f1 text, f2 text, f3 text); $$;
+
+"quoted empty string","","should be empty string"
+"no value between separators",,"should be null"
+"quoted blanks","    ","should be blanks"
+"unquoted blanks",    ,"should be null"
+"unquoted string",no quote,"should be 'no quote'"
+"quoted separator","a,b,c","should be 'a,b,c'"
+"trim extra blanks",  test string  , "should be 'test string'"