Improve warning control API (with backwards compatibility)

A wart of the warning control API (enable/disable_*_warnings()) is that
the current warning settings can't be queried. Querying warning settings
is useful in functions that want to temporarily enable/disable some
warning and then put things back to how they were.
kconfiglib.load_allconfig() ran into this, for example.

Make the internal warning control variables public (improve the naming
at the same time), and encourage just setting them directly. Keep the
old API for backwards compatibility.

Also remove _warn_redun_assign() and _warn_override(). They're trivial
and were called in a single place.

1 files changed, 16 insertions, 12 deletions

diff --git a/testsuite.py b/testsuite.py
index 376f165..8e17d84 100644
--- a/testsuite.py
+++ b/testsuite.py
@@ -356,7 +356,7 @@ def run_selftests():
     verify_eval('"foo" = "foo"', 2)
 
     # Undefined symbols get their name as their value
-    c.disable_warnings()
+    c.warn = False
     verify_eval("'not_defined' = not_defined", 2)
     verify_eval("not_defined_2 = not_defined_2", 2)
     verify_eval("not_defined_1 != not_defined_2", 2)
@@ -957,20 +957,21 @@ config DEP_REM_CORNER_CASES
     print("Testing Kconfig.__repr__()")
 
     verify_repr(c, """
-<configuration with 14 symbols, main menu prompt "Main menu", srctree is current directory, config symbol prefix "CONFIG_", warnings disabled, printing of warnings to stderr enabled, undef. symbol assignment warnings disabled, redundant symbol assignment warnings enabled>
+<configuration with 14 symbols, main menu prompt "Main menu", srctree is current directory, config symbol prefix "CONFIG_", warnings disabled, printing of warnings to stderr enabled, undef. symbol assignment warnings disabled, overriding symbol assignment warnings enabled, redundant symbol assignment warnings enabled>
 """)
 
     os.environ["srctree"] = "Kconfiglib"
     os.environ["CONFIG_"] = "CONFIG_ value"
 
     c = Kconfig("tests/Krepr", warn=False)
-    c.enable_warnings()
-    c.disable_stderr_warnings()
-    c.disable_redun_warnings()
-    c.enable_undef_warnings()
+    c.warn = True
+    c.warn_to_stderr = False
+    c.warn_assign_override = False
+    c.warn_assign_redun = False
+    c.warn_assign_undef = True
 
     verify_repr(c, """
-<configuration with 14 symbols, main menu prompt "Main menu", srctree "Kconfiglib", config symbol prefix "CONFIG_ value", warnings enabled, printing of warnings to stderr disabled, undef. symbol assignment warnings enabled, redundant symbol assignment warnings disabled>
+<configuration with 14 symbols, main menu prompt "Main menu", srctree "Kconfiglib", config symbol prefix "CONFIG_ value", warnings enabled, printing of warnings to stderr disabled, undef. symbol assignment warnings enabled, overriding symbol assignment warnings disabled, redundant symbol assignment warnings disabled>
 """)
 
     os.environ.pop("srctree", None)
@@ -1311,7 +1312,7 @@ tests/Krecursive2:1
     print("Testing split_expr()")
 
     c = Kconfig("Kconfiglib/tests/empty")
-    c.disable_warnings()
+    c.warn = False
 
     def verify_split(to_split, op, operand_strs):
         # The same hackage as in Kconfig.eval_string()
@@ -1630,7 +1631,7 @@ tests/Krecursive2:1
     # User values and dependent ranges
 
     # Avoid warnings for assigning values outside the active range
-    c.disable_warnings()
+    c.warn = False
 
     def verify_range(sym_name, low, high, default):
         # Verifies that all values in the range 'low'-'high' can be assigned,
@@ -1760,7 +1761,7 @@ tests/Krecursive2:1
 
     # Avoid warnings from assigning invalid user values and assigning user
     # values to symbols without prompts
-    c.disable_warnings()
+    c.warn = False
 
     syms = [c.syms[name] for name in
             ("BOOL", "TRISTATE", "STRING", "INT", "HEX")]
@@ -2803,6 +2804,8 @@ def test_sanity(arch, srcarch):
     kconf.modules
     kconf.defconfig_list
     kconf.defconfig_filename
+
+    # Legacy warning functions
     kconf.enable_redun_warnings()
     kconf.disable_redun_warnings()
     kconf.enable_undef_warnings()
@@ -2811,6 +2814,7 @@ def test_sanity(arch, srcarch):
     kconf.disable_warnings()
     kconf.enable_stderr_warnings()
     kconf.disable_stderr_warnings()
+
     kconf.mainmenu_text
     kconf.unset_values()
 
@@ -2843,7 +2847,7 @@ def test_sanity(arch, srcarch):
         sym.set_value(2)
         sym.set_value("foo")
         sym.unset_value()
-        kconf.enable_warnings()
+        kconf.enable_warnings()  # Legacy warning function
         sym.str_value
         sym.tri_value
         sym.type
@@ -2881,7 +2885,7 @@ def test_sanity(arch, srcarch):
         sym.set_value(2)
         sym.set_value("foo")
         sym.unset_value()
-        kconf.enable_warnings()
+        kconf.enable_warnings()  # Legacy warning function
         sym.str_value
         sym.tri_value
         sym.type