fix: pass line ranges as value instead of callback

The callback no longer takes any arguments from the inner function, so we might
as well call it sooner and pass the value instead. Note the value still needs
to be recomputed every iteration to account for the previous iteration's
changes to the file content.

Differential Revision: https://phab.mercurial-scm.org/D6727

hgext/fix.py

@@ -563,8 +563,8 b' def fixfile(ui, repo, opts, fixers, fixc'
     newdata = fixctx[path].data()
     for fixername, fixer in fixers.iteritems():
         if fixer.affects(opts, fixctx, path):
-            rangesfn = lambda: lineranges(opts, path, basectxs, fixctx, newdata)
-            command = fixer.command(ui, path, rangesfn)
+            ranges = lineranges(opts, path, basectxs, fixctx, newdata)
+            command = fixer.command(ui, path, ranges)
             if command is None:
                 continue
             ui.debug('subprocess: %s\n' % (command,))
@@ -758,7 +758,7 b' class Fixer(object):'
         """Should the stdout of this fixer start with JSON and a null byte?"""
         return self._metadata
 
-    def command(self, ui, path, rangesfn):
+    def command(self, ui, path, ranges):
         """A shell command to use to invoke this fixer on the given file/lines
 
         May return None if there is no appropriate command to run for the given
@@ -768,7 +768,6 b' class Fixer(object):'
         parts = [expand(ui, self._command,
                         {'rootpath': path, 'basename': os.path.basename(path)})]
         if self._linerange:
-            ranges = rangesfn()
             if self._skipclean and not ranges:
                 # No line ranges to fix, so don't run the fixer.
                 return None