xref: /openbmc/qemu/scripts/clean-includes (revision b7770d72) 
1#!/bin/sh -e
2#
3# Clean up QEMU #include lines by ensuring that qemu/osdep.h
4# is the first include listed in .c files, and no headers provided
5# by osdep.h itself are redundantly included in either .c or .h files.
6#
7# Copyright (c) 2015 Linaro Limited
8#
9# Authors:
10#  Peter Maydell <peter.maydell@linaro.org>
11#
12# This work is licensed under the terms of the GNU GPL, version 2
13# or (at your option) any later version. See the COPYING file in
14# the top-level directory.
15
16# Usage:
17#   clean-includes [--git subjectprefix] [--check-dup-head] file ...
18# or
19#   clean-includes [--git subjectprefix] [--check-dup-head] --all
20#
21# If the --git subjectprefix option is given, then after making
22# the changes to the files this script will create a git commit
23# with the subject line "subjectprefix: Clean up includes"
24# and a boilerplate commit message.
25#
26# If --check-dup-head is specified, additionally check for duplicate
27# header includes.
28#
29# Using --all will cause clean-includes to run on the whole source
30# tree (excluding certain directories which are known not to need
31# handling).
32
33# This script requires Coccinelle to be installed.
34
35# .c files will have the osdep.h included added, and redundant
36# includes removed.
37# .h files will have redundant includes (including includes of osdep.h)
38# removed.
39# Other files (including C++ and ObjectiveC) can't be handled by this script.
40
41# The following one-liner may be handy for finding files to run this on.
42# However some caution is required regarding files that might be part
43# of the guest agent or standalone tests.
44
45# for i in $(git ls-tree --name-only HEAD) ; do test -f $i && \
46#   grep -E '^# *include' $i | head -1 | grep 'osdep.h' ; test $? != 0 && \
47#   echo $i ; done
48
49
50GIT=no
51DUPHEAD=no
52
53# Extended regular expression defining files to ignore when using --all
54XDIRREGEX='^(tests/tcg|tests/multiboot|tests/fp|tests/plugin|tests/uefi-test-tools|pc-bios|subprojects|contrib/plugins|tools/ebpf|ebpf/rss.bpf.skeleton.h|linux-user/(mips64|x86_64)/(cpu_loop|signal).c)'
55
56while true
57do
58    case $1 in
59    "--git")
60         if [ $# -eq 1 ]; then
61             echo "--git option requires an argument"
62             exit 1
63         fi
64         GITSUBJ="$2"
65         GIT=yes
66         shift
67         shift
68         ;;
69    "--check-dup-head")
70        DUPHEAD=yes
71        shift
72        ;;
73    "--")
74        shift
75        break
76        ;;
77    *)
78        break
79        ;;
80   esac
81done
82
83if [ $# -eq 0 ]; then
84    echo "Usage: clean-includes [--git subjectprefix] [--check-dup-head] [--all | foo.c ...]"
85    echo "(modifies the files in place)"
86    exit 1
87fi
88
89if [ "$1" = "--all" ]; then
90    # We assume there are no files in the tree with spaces in their name
91    set -- $(git ls-files '*.[ch]' | grep -E -v "$XDIRREGEX")
92fi
93
94# Annoyingly coccinelle won't read a scriptfile unless its
95# name ends '.cocci', so write it out to a tempfile with the
96# right kind of name.
97COCCIFILE="$(mktemp --suffix=.cocci)"
98
99trap 'rm -f -- "$COCCIFILE"' INT TERM HUP EXIT
100
101cat >"$COCCIFILE" <<EOT
102@@
103@@
104
105(
106+ #include "qemu/osdep.h"
107 #include "..."
108|
109+ #include "qemu/osdep.h"
110 #include <...>
111)
112EOT
113
114files=
115for f in "$@"; do
116  if [ -L "$f" ]; then
117      echo "SKIPPING $f (symbolic link)"
118      continue
119  fi
120  case "$f" in
121    *.c.inc)
122      # These aren't standalone C source files
123      echo "SKIPPING $f (not a standalone source file)"
124      continue
125      ;;
126    *.c)
127      MODE=c
128      ;;
129    *include/qemu/osdep.h | \
130    *include/qemu/compiler.h | \
131    *include/qemu/qemu-plugin.h | \
132    *include/glib-compat.h | \
133    *include/sysemu/os-posix.h | \
134    *include/sysemu/os-win32.h | \
135    *include/standard-headers/ )
136      # Removing include lines from osdep.h itself would be counterproductive.
137      echo "SKIPPING $f (special case header)"
138      continue
139      ;;
140    *include/standard-headers/*)
141      echo "SKIPPING $f (autogenerated header)"
142      continue
143      ;;
144    *.h)
145      MODE=h
146      ;;
147    *)
148      echo "WARNING: ignoring $f (cannot handle non-C files)"
149      continue
150      ;;
151  esac
152  files="$files $f"
153
154  if [ "$MODE" = "c" ]; then
155    # First, use Coccinelle to add qemu/osdep.h before the first existing include
156    # (this will add two lines if the file uses both "..." and <...> #includes,
157    # but we will remove the extras in the next step)
158    spatch  --in-place --no-show-diff --cocci-file "$COCCIFILE" "$f"
159
160    # Now remove any duplicate osdep.h includes
161    perl -n -i -e 'print if !/#include "qemu\/osdep.h"/ || !$n++;' "$f"
162  else
163    # Remove includes of osdep.h itself
164    perl -n -i -e 'print if !/\s*#\s*include\s*(["<][^>"]*[">])/ ||
165                            ! (grep { $_ eq $1 } qw ("qemu/osdep.h"))' "$f"
166  fi
167
168  # Remove includes that osdep.h already provides
169  perl -n -i -e 'print if !/\s*#\s*include\s*(["<][^>"]*[">])/ ||
170                          ! (grep { $_ eq $1 } qw (
171           "config-host.h" "config-target.h" "qemu/compiler.h"
172           <setjmp.h> <stdarg.h> <stddef.h> <stdbool.h> <stdint.h> <sys/types.h>
173           <stdlib.h> <stdio.h> <string.h> <strings.h> <inttypes.h>
174           <limits.h> <unistd.h> <time.h> <ctype.h> <errno.h> <fcntl.h>
175           <sys/stat.h> <sys/time.h> <assert.h> <signal.h> <glib.h>
176           <sys/stat.h> <sys/time.h> <assert.h> <signal.h> <glib.h> <sys/mman.h>
177           "sysemu/os-posix.h, sysemu/os-win32.h "glib-compat.h"
178           "qemu/typedefs.h"
179            ))' "$f"
180
181done
182
183if [ "$DUPHEAD" = "yes" ] && [ -n "$files" ]; then
184    if egrep "^[[:space:]]*#[[:space:]]*include" $files | tr -d '[:blank:]' \
185        | sort | uniq -c | grep -v '^ *1 '; then
186        echo "Found duplicate header file includes. Please check the above files manually."
187        exit 1
188    fi
189fi
190
191if [ "$GIT" = "yes" ]; then
192    git add -- $files
193    git commit --signoff -F - <<EOF
194$GITSUBJ: Clean up includes
195
196This commit was created with scripts/clean-includes.
197
198All .c should include qemu/osdep.h first.  The script performs three
199related cleanups:
200
201* Ensure .c files include qemu/osdep.h first.
202* Including it in a .h is redundant, since the .c  already includes
203  it.  Drop such inclusions.
204* Likewise, including headers qemu/osdep.h includes is redundant.
205  Drop these, too.
206
207EOF
208
209fi
210