find all chained ifs... and do precisely nothing with them... for now

diff --git a/qcsrc/tools/unc-chained-if-fix.py b/qcsrc/tools/unc-chained-if-fix.py
new file mode 100755 (executable)
index 0000000..8186372
--- /dev/null
+++ b/qcsrc/tools/unc-chained-if-fix.py
@@ -0,0 +1,84 @@
+#!/usr/bin/env python3
+
+import regex # needs regex instead of re for multiple captures of a group
+import glob
+
+# this is soooooo not regular ;)
+CHAINED_IF_REGEX = regex.compile(r"""
+(?:^|\n)
+(?<indent>
+    [\t ]*
+)
+if[\t ]*\(                          # the first condition
+    (?<cond>
+        (?<expr1>
+            [^()\n]*
+        |
+            [^()\n]*\(
+                (?&expr1)           # this is to match nested parentheses correctly
+            \)[^()\n]*
+        )+
+    )
+\)[\t ]*
+(?://.*|/\*.*\*/)?                  # comments
+\n
+(?:                                 # all subsequent conditions with the same indentation
+    \1
+    if[\t ]*\(
+        (?<conds>
+            (?<expr2>
+                [^()\n]*
+            |
+                [^()\n]*\(
+                    (?&expr2)
+                \)[^()\n]*
+            )+
+        )
+    \)[\t ]*
+    (?://.*|/\*.*\*/)?
+    \n
+)+
+""", regex.VERBOSE)
+
+all_files = set(glob.glob('**/*.qc', recursive=True) + glob.glob('**/*.qh', recursive=True))
+all_files = sorted({f for f in all_files if not f.startswith('qcsrc/dpdefs')})
+
+if 0:  # for debugging
+    all_files = ["qcsrc/common/mutators/mutator/campcheck/sv_campcheck.qc", "qcsrc/common/weapons/weapon/minelayer.qc", "qcsrc/server/bot/default/navigation.qc"]
+
+total = 0
+for file_name in all_files:
+    with open(file_name, 'r+') as f:
+        print()
+        print(file_name)
+        print("=================")
+        print()
+
+        def repl(match):
+            global total
+            total += 1
+
+            print("whole match:")
+            print(match.group(0))
+            print("lines:", len(match.group(0).split('\n')))
+            print("captures 1:", match.captures('indent'))
+            print("captures 2:", match.captures('cond'))
+            print("captures 3:", match.captures('conds'))
+            if '||' in match.group(0) or '^' in match.group(0):
+                print("WARNING - logical ops")
+
+            print()
+            print()
+
+            return str(match.group(0))
+
+        old_code = f.read()
+        new_code = CHAINED_IF_REGEX.sub(repl, old_code)
+        #with open('new-code', 'w') as f:
+        #    f.write(new_code)
+
+        f.seek(0)
+        f.truncate()
+        f.write(new_code)
+
+print("total if chains:", total)