scripts/diffconfig

Source file repositories/reference/linux-study-clean/scripts/diffconfig

File Facts

System
Linux kernel
Corpus path
scripts/diffconfig
Extension
[no extension]
Size
4222 bytes
Lines
145
Domain
Support Tooling And Documentation
Bucket
scripts
Inferred role
Support Tooling And Documentation: scripts
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0
#
# diffconfig - a tool to compare .config files.
#
# originally written in 2006 by Matt Mackall
#  (at least, this was in his bloatwatch source code)
# last worked on 2008 by Tim Bird
#

import sys, os

def usage():
    print("""Usage: diffconfig [-h] [-m] [<config1> <config2>]

Diffconfig is a simple utility for comparing two .config files.
Using standard diff to compare .config files often includes extraneous and
distracting information.  This utility produces sorted output with only the
changes in configuration values between the two files.

Added and removed items are shown with a leading plus or minus, respectively.
Changed items show the old and new values on a single line.

If -m is specified, then output will be in "merge" style, which has the
changed and new values in kernel config option format.

If no config files are specified, .config and .config.old are used.

Example usage:
 $ diffconfig .config config-with-some-changes
-EXT2_FS_XATTR  n
 CRAMFS  n -> y
 EXT2_FS  y -> n
 LOG_BUF_SHIFT  14 -> 16
 PRINTK_TIME  n -> y
""")
    sys.exit(0)

# returns a dictionary of name/value pairs for config items in the file
def readconfig(config_file):
    d = {}
    for line in config_file:
        line = line[:-1]
        if line[:7] == "CONFIG_":
            name, val = line[7:].split("=", 1)
            d[name] = val
        if line[-11:] == " is not set":
            d[line[9:-11]] = "n"
    return d

def print_config(op, config, value, new_value):
    global merge_style

    if merge_style:
        if new_value:
            if new_value=="n":
                print("# CONFIG_%s is not set" % config)
            else:
                print("CONFIG_%s=%s" % (config, new_value))
    else:
        if op=="-":
            print("-%s %s" % (config, value))
        elif op=="+":
            print("+%s %s" % (config, new_value))
        else:
            print(" %s %s -> %s" % (config, value, new_value))

def show_diff():
    global merge_style

Annotation

Implementation Notes