diff mbox series

[U-Boot,RFC] moveconfig: add a second pass for empty #if/#endif blocks

Message ID 20180604092745.22468-1-judge.packham@gmail.com
State RFC
Delegated to: Masahiro Yamada
Headers show
Series [U-Boot,RFC] moveconfig: add a second pass for empty #if/#endif blocks | expand

Commit Message

Chris Packham June 4, 2018, 9:27 a.m. UTC
Moveconfig already attempts to remove empty #if/#endif blocks when there
is a matching CONFIG_ being moved. Add a second pass which covers files
without a match.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
---
I've plumbed this in as a second pass because ultimately we may want to
make this a separate option. Also I couldn't figure out how to implement
this without using re.M so I couldn't make it work in with the line by
line parsing of cleanup_one_header().

 tools/moveconfig.py | 27 +++++++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

Comments

Andy Shevchenko June 4, 2018, 9:49 a.m. UTC | #1
On Mon, 2018-06-04 at 21:27 +1200, Chris Packham wrote:
> Moveconfig already attempts to remove empty #if/#endif blocks when
> there
> is a matching CONFIG_ being moved. Add a second pass which covers
> files
> without a match.

> +    pattern = r'^\s*#\s*if.*$\n^\s*#\s*endif.*$\n*'

Any reason not to use re.compile() ?

> +    with open(header_path) as f:
> +        data = f.read()
> +
> +    new_data = re.sub(pattern, '\n', data, flags=re.M)
Chris Packham June 5, 2018, 12:56 a.m. UTC | #2
On Mon, Jun 4, 2018 at 9:49 PM Andy Shevchenko
<andriy.shevchenko@linux.intel.com> wrote:
>
> On Mon, 2018-06-04 at 21:27 +1200, Chris Packham wrote:
> > Moveconfig already attempts to remove empty #if/#endif blocks when
> > there
> > is a matching CONFIG_ being moved. Add a second pass which covers
> > files
> > without a match.
>
> > +    pattern = r'^\s*#\s*if.*$\n^\s*#\s*endif.*$\n*'
>
> Any reason not to use re.compile() ?

Laziness on my part. Will do in v2.

> > +    with open(header_path) as f:
> > +        data = f.read()
> > +
> > +    new_data = re.sub(pattern, '\n', data, flags=re.M)
>
> --
> Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> Intel Finland Oy
diff mbox series

Patch

diff --git a/tools/moveconfig.py b/tools/moveconfig.py
index caa81ac2ed77..ff70925f9ee4 100755
--- a/tools/moveconfig.py
+++ b/tools/moveconfig.py
@@ -545,6 +545,28 @@  def confirm(options, prompt):
 
     return True
 
+def cleanup_empty_blocks(header_path, options):
+    """Clean up empty conditional blocks
+
+    Arguments:
+      header_path: path to the cleaned file.
+      options: option flags.
+    """
+    pattern = r'^\s*#\s*if.*$\n^\s*#\s*endif.*$\n*'
+    with open(header_path) as f:
+        data = f.read()
+
+    new_data = re.sub(pattern, '\n', data, flags=re.M)
+
+    show_diff(data.splitlines(True), new_data.splitlines(True), header_path,
+              options.color)
+
+    if options.dry_run:
+        return
+
+    with open(header_path, 'w') as f:
+        f.write(new_data)
+
 def cleanup_one_header(header_path, patterns, options):
     """Clean regex-matched lines away from a file.
 
@@ -626,8 +648,9 @@  def cleanup_headers(configs, options):
                 continue
             for filename in filenames:
                 if not fnmatch.fnmatch(filename, '*~'):
-                    cleanup_one_header(os.path.join(dirpath, filename),
-                                       patterns, options)
+                    header_path = os.path.join(dirpath, filename)
+                    cleanup_one_header(header_path, patterns, options)
+                    cleanup_empty_blocks(header_path, options)
 
 def cleanup_one_extra_option(defconfig_path, configs, options):
     """Delete config defines in CONFIG_SYS_EXTRA_OPTIONS in one defconfig file.