scripts: Reverted del to resolve shadowed builtins

I don't know how I completely missed that this doesn't actually work!

Using del _does_ work in Python's repl, but it makes sense the repl may
differ from actual function execution in this case.

The problem is Python still thinks the relevant builtin is a local
variables after deletion, raising an UnboundLocalError instead of
performing a global lookup. In theory this would work if the variable
could be made global, but since global/nonlocal statements are lifted,
Python complains with "SyntaxError: name 'list' is parameter and
global".

And that's A-Ok! Intentionally shadowing language builtins already puts
this code deep into ugly hacks territory.

scripts/code.py

@@ -603,7 +603,8 @@ def table(Result, results, diff_results=None, *,
         small_table=False,
         summary=False,
         **_):
-    all_ = all; del all
+    import builtins
+    all_, all = all, builtins.all
 
     if by is None:
         by = Result._by

scripts/cov.py

@@ -463,7 +463,8 @@ def table(Result, results, diff_results=None, *,
         small_table=False,
         summary=False,
         **_):
-    all_ = all; del all
+    import builtins
+    all_, all = all, builtins.all
 
     if by is None:
         by = Result._by

scripts/crc32c.py

@@ -41,7 +41,8 @@ def crc32c(data, crc=0):
 def main(paths, *,
         hex=False,
         string=False):
-    hex_ = hex; del hex
+    import builtins
+    hex_, hex = hex, builtins.hex
 
     # interpret as sequence of hex bytes
     if hex_:

scripts/csv.py

@@ -1735,7 +1735,8 @@ def table(Result, results, diff_results=None, *,
         small_table=False,
         summary=False,
         **_):
-    all_ = all; del all
+    import builtins
+    all_, all = all, builtins.all
 
     if by is None:
         by = Result._by

scripts/ctx.py

@@ -863,7 +863,8 @@ def table(Result, results, diff_results=None, *,
         small_table=False,
         summary=False,
         **_):
-    all_ = all; del all
+    import builtins
+    all_, all = all, builtins.all
 
     if by is None:
         by = Result._by

scripts/data.py

@@ -603,7 +603,8 @@ def table(Result, results, diff_results=None, *,
         small_table=False,
         summary=False,
         **_):
-    all_ = all; del all
+    import builtins
+    all_, all = all, builtins.all
 
     if by is None:
         by = Result._by

scripts/dbgbmap.py

@@ -2964,7 +2964,8 @@ class Lfs:
     # lookup operations 
     def lookup(self, mid, mdir=None, *,
             all=False):
-        all_ = all; del all
+        import builtins
+        all_, all = all, builtins.all
 
         # is this mid grmed?
         if not all_ and self.grmed(mid):
@@ -2985,7 +2986,8 @@ class Lfs:
 
     def namelookup(self, did, name, *,
             all=False):
-        all_ = all; del all
+        import builtins
+        all_, all = all, builtins.all
 
         mid_, mdir_, name_ = self.mtree.namelookup(did, name)
         if mid_ is None:
@@ -3047,7 +3049,8 @@ class Lfs:
             all=False,
             path=False,
             depth=None):
-        all_ = all; del all
+        import builtins
+        all_, all = all, builtins.all
 
         # default to the root directory
         if path_ is None:
@@ -3100,7 +3103,8 @@ class Lfs:
             all=False,
             path=False,
             depth=None):
-        all_ = all; del all
+        import builtins
+        all_, all = all, builtins.all
 
         # default to the root directory
         did = did or self.root.did
@@ -3155,7 +3159,8 @@ class Lfs:
 
     def orphans(self,
             all=False):
-        all_ = all; del all
+        import builtins
+        all_, all = all, builtins.all
 
         # first find all reachable dids
         dids = {self.root.did}

scripts/dbgbmapd3.py

@@ -2994,7 +2994,8 @@ class Lfs:
     # lookup operations 
     def lookup(self, mid, mdir=None, *,
             all=False):
-        all_ = all; del all
+        import builtins
+        all_, all = all, builtins.all
 
         # is this mid grmed?
         if not all_ and self.grmed(mid):
@@ -3015,7 +3016,8 @@ class Lfs:
 
     def namelookup(self, did, name, *,
             all=False):
-        all_ = all; del all
+        import builtins
+        all_, all = all, builtins.all
 
         mid_, mdir_, name_ = self.mtree.namelookup(did, name)
         if mid_ is None:
@@ -3077,7 +3079,8 @@ class Lfs:
             all=False,
             path=False,
             depth=None):
-        all_ = all; del all
+        import builtins
+        all_, all = all, builtins.all
 
         # default to the root directory
         if path_ is None:
@@ -3130,7 +3133,8 @@ class Lfs:
             all=False,
             path=False,
             depth=None):
-        all_ = all; del all
+        import builtins
+        all_, all = all, builtins.all
 
         # default to the root directory
         did = did or self.root.did
@@ -3185,7 +3189,8 @@ class Lfs:
 
     def orphans(self,
             all=False):
-        all_ = all; del all
+        import builtins
+        all_, all = all, builtins.all
 
         # first find all reachable dids
         dids = {self.root.did}

scripts/dbgerr.py

@@ -28,7 +28,8 @@ ERRS = [
 
 def main(errs, *,
         list=False):
-    list_ = list; del list
+    import builtins
+    list_, list = list, builtins.list
 
     lines = []
     # list all known error codes

scripts/dbgflags.py

@@ -205,8 +205,9 @@ FLAGS = [
 def main(flags, *,
         list=False,
         all=False):
-    list_ = list; del list
-    all_ = all; del all
+    import builtins
+    list_, list = list, builtins.list
+    all_, all = all, builtins.all
 
     # first compile prefixes
     prefixes = {}

scripts/dbgle32.py

@@ -59,7 +59,8 @@ def main(le32s, *,
         hex=False,
         input=None,
         word_bits=32):
-    hex_ = hex; del hex
+    import builtins
+    hex_, hex = hex, builtins.hex
 
     # interpret as a sequence of hex bytes
     if hex_:

scripts/dbgleb128.py

@@ -71,7 +71,8 @@ def main(leb128s, *,
         hex=False,
         input=None,
         word_bits=32):
-    hex_ = hex; del hex
+    import builtins
+    hex_, hex = hex, builtins.hex
 
     # interpret as a sequence of hex bytes
     if hex_:

scripts/dbglfs.py

@@ -2921,7 +2921,8 @@ class Lfs:
     # lookup operations 
     def lookup(self, mid, mdir=None, *,
             all=False):
-        all_ = all; del all
+        import builtins
+        all_, all = all, builtins.all
 
         # is this mid grmed?
         if not all_ and self.grmed(mid):
@@ -2942,7 +2943,8 @@ class Lfs:
 
     def namelookup(self, did, name, *,
             all=False):
-        all_ = all; del all
+        import builtins
+        all_, all = all, builtins.all
 
         mid_, mdir_, name_ = self.mtree.namelookup(did, name)
         if mid_ is None:
@@ -3004,7 +3006,8 @@ class Lfs:
             all=False,
             path=False,
             depth=None):
-        all_ = all; del all
+        import builtins
+        all_, all = all, builtins.all
 
         # default to the root directory
         if path_ is None:
@@ -3057,7 +3060,8 @@ class Lfs:
             all=False,
             path=False,
             depth=None):
-        all_ = all; del all
+        import builtins
+        all_, all = all, builtins.all
 
         # default to the root directory
         did = did or self.root.did
@@ -3112,7 +3116,8 @@ class Lfs:
 
     def orphans(self,
             all=False):
-        all_ = all; del all
+        import builtins
+        all_, all = all, builtins.all
 
         # first find all reachable dids
         dids = {self.root.did}
@@ -4142,7 +4147,8 @@ def dbg_files(lfs, paths, *,
         all=False,
         no_orphans=False,
         **args):
-    all_ = all; del all
+    import builtins
+    all_, all = all, builtins.all
 
     # parse all paths first, error if anything is malformed
     dirs = []

scripts/dbgrbyd.py

@@ -948,7 +948,8 @@ class JumpArt:
 
     @classmethod
     def fromrbyd(cls, rbyd, all=False):
-        all_ = all; del all
+        import builtins
+        all_, all = all, builtins.all
 
         jumps = []
         j_ = 4
@@ -1100,7 +1101,8 @@ class LifetimeArt:
 
     @classmethod
     def fromrbyd(cls, rbyd, all=False):
-        all_ = all; del all
+        import builtins
+        all_, all = all, builtins.all
 
         # first figure out where each rid comes from
         id = 0

scripts/dbgtag.py

@@ -290,8 +290,9 @@ def main(tags, *,
         hex=False,
         input=None,
         word_bits=32):
-    list_ = list; del list
-    hex_ = hex; del hex
+    import builtins
+    list_, list = list, builtins.list
+    hex_, hex = hex, builtins.hex
 
     # list all known tags
     if list_:

scripts/parity.py

@@ -49,7 +49,8 @@ def parity(x):
 def main(paths, *,
         hex=False,
         string=False):
-    hex_ = hex; del hex
+    import builtins
+    hex_, hex = hex, builtins.hex
 
     # interpret as sequence of hex bytes
     if hex_:

scripts/perf.py

@@ -964,7 +964,8 @@ def table(Result, results, diff_results=None, *,
         small_table=False,
         summary=False,
         **_):
-    all_ = all; del all
+    import builtins
+    all_, all = all, builtins.all
 
     if by is None:
         by = Result._by

scripts/perfbd.py

@@ -938,7 +938,8 @@ def table(Result, results, diff_results=None, *,
         small_table=False,
         summary=False,
         **_):
-    all_ = all; del all
+    import builtins
+    all_, all = all, builtins.all
 
     if by is None:
         by = Result._by

scripts/stack.py

@@ -606,7 +606,8 @@ def table(Result, results, diff_results=None, *,
         small_table=False,
         summary=False,
         **_):
-    all_ = all; del all
+    import builtins
+    all_, all = all, builtins.all
 
     if by is None:
         by = Result._by

scripts/structs.py

@@ -744,7 +744,8 @@ def table(Result, results, diff_results=None, *,
         small_table=False,
         summary=False,
         **_):
-    all_ = all; del all
+    import builtins
+    all_, all = all, builtins.all
 
     if by is None:
         by = Result._by