From 41c66b1ab498e3112005a2d83b5411383963d7b8 Mon Sep 17 00:00:00 2001
From: "Salvador E. Tropea" <salvador@inti.gob.ar>
Date: Sun, 30 Aug 2020 11:54:34 -0300
Subject: [PATCH] Added support for '~' as empty value.

---
 kibot/bom/bom.py   | 9 ++++++++-
 kibot/bom/units.py | 6 +++++-
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/kibot/bom/bom.py b/kibot/bom/bom.py
index 1a4f1f14..4f3f76c5 100644
--- a/kibot/bom/bom.py
+++ b/kibot/bom/bom.py
@@ -26,8 +26,15 @@ RLC_PREFIX = {'R': 1, 'L': 1, 'C': 1, 'RV': 1, 'RN': 1, 'RT': 1}
 
 def compare_value(c1, c2, cfg):
     """ Compare the value of two components """
+    c1_value = c1.value.strip().lower()
+    c2_value = c2.value.strip().lower()
+    # '~' is the same as empty for KiCad
+    if c1_value == '~':
+        c1_value = ''
+    if c2_value == '~':
+        c2_value = ''
     # Simple string comparison
-    if c1.value.lower() == c2.value.lower():
+    if c1_value == c2_value:
         return True
     # Otherwise, perform a more complicated value comparison
     if compare_values(c1, c2):
diff --git a/kibot/bom/units.py b/kibot/bom/units.py
index 125f1c71..f4d45617 100644
--- a/kibot/bom/units.py
+++ b/kibot/bom/units.py
@@ -103,8 +103,12 @@ def comp_match(component, ref_prefix):
     e.g. comp_match('10R2') returns (10, R)
     e.g. comp_match('3.3mOhm') returns (0.0033, R)
     """
-
     original = component
+    # Remove useless spaces
+    component = component.strip()
+    # ~ is the same as empty for KiCad
+    if component == '~':
+        component = ''
     # Convert the decimal point from the current locale to a '.'
     global decimal_point
     if decimal_point is None: