Support style for missing value. (#1186)

* Support style for missing value.

* update changelog.

* upgrade minimal version of cli_helpers, in order to use style for null.

changelog.rst

@@ -7,6 +7,7 @@ Features:
 * Make the output more compact by removing the empty newline. (Thanks: `laixintao`_)
 * Add support for using [pspg](https://github.com/okbob/pspg) as a pager (#1102)
 * Update python version in Dockerfile
+* Support setting color for null value
 
 Bug fixes:
 ----------

pgcli/pgclirc

@@ -175,6 +175,7 @@ bottom-toolbar.transaction.failed = 'bg:#222222 #ff005f bold'
 output.header = "#00ff5f bold"
 output.odd-row = ""
 output.even-row = ""
+output.null = "#808080"
 
 # Named queries are queries you can execute by name.
 [named queries]

pgcli/pgstyle.py

@@ -34,6 +34,7 @@ TOKEN_TO_PROMPT_STYLE = {
     Token.Output.Header: "output.header",
     Token.Output.OddRow: "output.odd-row",
     Token.Output.EvenRow: "output.even-row",
+    Token.Output.Null: "output.null",
 }
 
 # reverse dict for cli_helpers, because they still expect Pygments tokens.
@@ -52,7 +53,7 @@ def parse_pygments_style(token_name, style_object, style_dict):
     try:
         other_token_type = string_to_tokentype(style_dict[token_name])
         return token_type, style_object.styles[other_token_type]
-    except AttributeError as err:
+    except AttributeError:
         return token_type, style_dict[token_name]
 
 

setup.py

@@ -14,7 +14,7 @@ install_requirements = [
     "sqlparse >=0.3.0,<0.4",
     "configobj >= 5.0.6",
     "humanize >= 0.5.1",
-    "cli_helpers[styles] >= 1.2.0",
+    "cli_helpers[styles] >= 2.0.0",
 ]