admin/uncrustify.sh

   1 #!/bin/bash
   2 #
   3 # This file is part of the GROMACS molecular simulation package.
   4 #
   5 # Copyright (c) 2013,2014, by the GROMACS development team, led by
   6 # Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
   7 # and including many others, as listed in the AUTHORS file in the
   8 # top-level source directory and at http://www.gromacs.org.
   9 #
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  14 #
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  18 # Lesser General Public License for more details.
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  31 # official version at http://www.gromacs.org.
  32 #
  33 # To help us fund GROMACS development, we humbly ask that you cite
  34 # the research papers on the package. Check out http://www.gromacs.org.
  35
  36 # This script runs uncrustify on modified files and reports/applies the
  37 # results.  It also checks for outdated copyright years or headers.
  38 # By default, the current HEAD commit is compared to the work tree,
  39 # and files that
  40 #  1. are different between these two trees and
  41 #  2. change under uncrustify and/or have outdated copyright header
  42 # are reported.  This behavior can be changed by
  43 #  1. Specifying an --rev=REV argument, which uses REV instead of HEAD as
  44 #     the base of the comparison.
  45 #  2. Specifying an action:
  46 #       check-*:   reports the files that uncrustify changes
  47 #       diff-*:    prints the actual diff of what would change
  48 #       update-*:  applies the changes to the repository
  49 #       *-workdir: operates on the working directory (files on disk)
  50 #       *-index:   operates on the index of the repository
  51 #     For convenience, if you omit the workdir/index suffix, workdir is assumed
  52 #     (i.e., diff equals diff-workdir).
  53 #  3. Specifying --uncrustify=off, which does not run uncrustify.
  54 #  4. Specifying --copyright=<mode>, which alters the level of copyright
  55 #     checking is done:
  56 #       off:     does not check copyright headers at all
  57 #       year:    only update copyright year in new-format copyright headers
  58 #       add:     in addition to 'year', add copyright headers to files that
  59 #                don't have any
  60 #       update:  in addition to 'year' and 'add', also update new-format
  61 #                copyright headers if they are broken or outdated.
  62 #       replace: replace any copyright header with a new-format copyright
  63 #                header
  64 #       full:    do all of the above
  65 # By default, update-* refuses to update "dirty" files (i.e., that differ
  66 # between the disk and the index) to make it easy to revert the changes.
  67 # This can be overridden by adding a -f/--force option.
  68 #
  69 # The location of the uncrustify executable must be specified using an
  70 # environment variable UNCRUSTIFY.  Note that to produce the indentation used
  71 # in the source tree, you need a custom version of uncrustify.
  72 # To get and configure the currently used version, you can do the following:
  73 #  1. Run
  74 #       git clone -b gromacs git://github.com/rolandschulz/uncrustify.git
  75 #       cd uncrustify
  76 #       ./configure
  77 #       make
  78 #  2. Copy the binary src/uncrustify into a directory of your choice.
  79 #  3. Set the UNCRUSTIFY environment variable to point to the copied binary.
  80 #
  81 # To identify which files to run through uncrustify, the script uses git
  82 # filters, specified in .gitattributes files.  Only files that have the filter
  83 # set as "uncrustify" (or something ending in "uncrustify") are processed: if
  84 # other files have been changed, they are ignored by the script.  Files passed
  85 # to uncrustify, as well as files with filter "copyright", get their copyright
  86 # header checked.  To only run uncrustify for a file, set the filter to
  87 # "uncrustify_only".
  88 #
  89 # If you want to run uncrustify automatically for changes you make, there are
  90 # two options:
  91 #  1. Copy the git-pre-commit script in this directory to .git/hooks/pre-commit
  92 #     and set
  93 #       git config hooks.uncrustifymode check
  94 #       git config hooks.uncrustifypath /path/to/uncrustify
  95 #     See comments in the hook script for more information.
  96 #  2. Configure a git filter (doesn't require this script, only the
  97 #     .gitattributes files):
  98 #       git config filter.uncrustify.clean \
  99 #           "/path/to/uncrustify -c admin/uncrustify.cfg -q -l cpp"
 100 # The pre-commit hook + manually running the script gives better/more intuitive
 101 # control (with the filter, it is possible to have a work tree that is
 102 # different from HEAD and still have an empty 'git diff') and provides better
 103 # performance for changes that modify many files.  It is the only way that
 104 # currently also checks the copyright headers.
 105 # The filter allows one to transparently merge branches that have not been run
 106 # through uncrustify, and is applied more consistently (the pre-commit hook is
 107 # not run for every commit, e.g., during a rebase).
 108
 109 # Parse command-line arguments
 110 function usage() {
 111     echo "usage: uncrustify.sh [-f|--force] [--rev=REV]"
 112     echo "           [--uncrustify=(off|check)] [--copyright=<cmode>] [<action>]"
 113     echo "<action>: (check*|diff|update)[-(index|workdir*)] (*=default)"
 114     echo "<cmode>:  off|add|update*|replace|full"
 115 }
 116
 117 action="check-workdir"
 118 declare -a diffargs
 119 baserev="HEAD"
 120 force=
 121 uncrustify_mode=check
 122 copyright_mode=update
 123 for arg in "$@" ; do
 124     if [[ "$arg" == "check-index" || "$arg" == "check-workdir" || \
 125           "$arg" == "diff-index" || "$arg" == "diff-workdir" || \
 126           "$arg" == "update-index" || "$arg" == "update-workdir" ]]
 127     then
 128         action=$arg
 129     elif [[ "$arg" == "check" || "$arg" == "diff" || "$arg" == "update" ]] ; then
 130         action=$arg-workdir
 131     elif [[ "$action" == diff-* ]] ; then
 132         diffargs+=("$arg")
 133     elif [[ "$arg" == --uncrustify=* ]] ; then
 134         uncrustify_mode=${arg#--uncrustify=}
 135         if [[ "$uncrustify_mode" != "off" && "$uncrustify_mode" != "check" ]] ; then
 136             echo "Unknown option: $arg"
 137             echo
 138             usage
 139             exit 2
 140         fi
 141     elif [[ "$arg" == --copyright=* ]] ; then
 142         copyright_mode=${arg#--copyright=}
 143     elif [[ "$arg" == "-f" || "$arg" == "--force" ]] ; then
 144         force=1
 145     elif [[ "$arg" == --rev=* ]] ; then
 146         baserev=${arg#--rev=}
 147     elif [[ "$arg" == "-h" ]] ; then
 148         usage
 149         exit 0
 150     else
 151         echo "Unknown option: $arg"
 152         echo
 153         usage
 154         exit 2
 155     fi
 156 done
 157
 158 # Check that uncrustify is present
 159 if [[ "$uncrustify_mode" != "off" ]]
 160 then
 161     if [ -z "$UNCRUSTIFY" ]
 162     then
 163         echo "Please set the path to uncrustify using UNCRUSTIFY."
 164         echo "Note that you need a custom version of uncrustify."
 165         echo "See comments in the script file for how to get one."
 166         exit 2
 167     fi
 168     if ! which "$UNCRUSTIFY" 1>/dev/null
 169     then
 170         echo "Uncrustify not found: $UNCRUSTIFY"
 171         exit 2
 172     fi
 173 fi
 174
 175 # Switch to the root of the source tree and check the config file
 176 srcdir=`git rev-parse --show-toplevel`
 177 cd $srcdir
 178 admin_dir=$srcdir/admin
 179 cfg_file=$admin_dir/uncrustify.cfg
 180 if [ ! -f "$cfg_file" ]
 181 then
 182     echo "Uncrustify configuration file not found: $cfg_file"
 183     exit 2
 184 fi
 185
 186 # Actual processing starts: create a temporary directory
 187 tmpdir=`mktemp -d -t gmxuncrust.XXXXXX`
 188
 189 # Produce a list of changed files
 190 # Only include files that have proper filter set in .gitattributes
 191 internal_diff_args=
 192 if [[ $action == *-index ]]
 193 then
 194     internal_diff_args="--cached"
 195 fi
 196 git diff-index $internal_diff_args --diff-filter=ACMR $baserev >$tmpdir/difflist
 197 cut -f2 <$tmpdir/difflist | \
 198     git check-attr --stdin filter | \
 199     sed -e 's/.*: filter: //' | \
 200     paste $tmpdir/difflist - | \
 201     grep -E '(uncrustify|uncrustify_only|copyright)$' >$tmpdir/filtered
 202 cut -f2 <$tmpdir/filtered >$tmpdir/filelist_all
 203 grep -E '(uncrustify|uncrustify_only)$' <$tmpdir/filtered | \
 204     cut -f2 >$tmpdir/filelist_uncrustify
 205 grep -E '(uncrustify|copyright)$' <$tmpdir/filtered | \
 206     cut -f2 >$tmpdir/filelist_copyright
 207 git diff-files --name-only | grep -Ff $tmpdir/filelist_all >$tmpdir/localmods
 208
 209 # Extract changed files to a temporary directory
 210 mkdir $tmpdir/org
 211 if [[ $action == *-index ]] ; then
 212     git checkout-index --prefix=$tmpdir/org/ --stdin <$tmpdir/filelist_all
 213 else
 214     rsync --files-from=$tmpdir/filelist_all $srcdir $tmpdir/org
 215 fi
 216 # Duplicate the original files to a separate directory, where all changes will
 217 # be made.
 218 cp -r $tmpdir/org $tmpdir/new
 219
 220 # Create output file for what was done (in case no messages get written)
 221 touch $tmpdir/messages
 222
 223 # Run uncrustify on the temporary directory
 224 cd $tmpdir/new
 225 if [[ $uncrustify_mode != "off" ]] ; then
 226     if ! $UNCRUSTIFY -c $cfg_file -F $tmpdir/filelist_uncrustify --no-backup >$tmpdir/uncrustify.out 2>&1 ; then
 227         echo "Reformatting failed. Check uncrustify output below for errors:"
 228         cat $tmpdir/uncrustify.out
 229         rm -rf $tmpdir
 230         exit 2
 231     fi
 232     # Find the changed files if necessary
 233     if [[ $action != diff-* ]] ; then
 234         msg="needs uncrustify"
 235         if [[ $action == update-* ]] ; then
 236             msg="uncrustified"
 237         fi
 238         git diff --no-index --name-only ../org/ . | \
 239             awk -v msg="$msg" '{sub(/.\//,""); print $0 ": " msg}' >> $tmpdir/messages
 240     fi
 241     # TODO: Consider checking whether rerunning uncrustify causes additional changes
 242 fi
 243
 244 # Update the copyright headers using the requested mode
 245 if [[ $copyright_mode != "off" ]] ; then
 246     cpscript_args="--update-year"
 247     case "$copyright_mode" in
 248         year)
 249             ;;
 250         add)
 251             cpscript_args+=" --add-missing"
 252             ;;
 253         update)
 254             cpscript_args+=" --add-missing --update-header"
 255             ;;
 256         replace)
 257             cpscript_args+=" --replace-header"
 258             ;;
 259         full)
 260             cpscript_args+=" --add-missing --update-header --replace-header"
 261             ;;
 262         *)
 263             echo "Unknown copyright mode: $copyright_mode"
 264             exit 2
 265     esac
 266     if [[ $action == check-* ]] ; then
 267         cpscript_args+=" --check"
 268     fi
 269     # TODO: Probably better to invoke python explicitly through a customizable
 270     # variable.
 271     if ! $admin_dir/copyright.py -F $tmpdir/filelist_copyright $cpscript_args >>$tmpdir/messages
 272     then
 273         echo "Copyright checking failed!"
 274         rm -rf $tmpdir
 275         exit 2
 276     fi
 277 fi
 278
 279 cd $tmpdir
 280
 281 # If a diff was requested, show it and we are done
 282 if [[ $action == diff-* ]] ; then
 283     git diff --no-index --no-prefix "${diffargs[@]}" org/ new/
 284     rm -rf $tmpdir
 285     exit 0
 286 fi
 287
 288 # Find the changed files
 289 changes=
 290 set -o pipefail
 291 if ! git diff --no-index --name-only --exit-code org/ new/ | \
 292          sed -e 's#new/##' > $tmpdir/changed
 293 then
 294     changes=1
 295 fi
 296
 297 # Check if changed files have changed outside the index
 298 if grep -Ff $tmpdir/localmods $tmpdir/changed > $tmpdir/conflicts
 299 then
 300     awk '{print $0 ": has changes in work tree"}' $tmpdir/conflicts \
 301         >> $tmpdir/messages
 302     if [[ ! $force && $action == update-* ]] ; then
 303         echo "Modified files found in work tree, skipping update. Use -f to override."
 304         echo "The following would have been done:"
 305         sort $tmpdir/messages
 306         rm -rf $tmpdir
 307         exit 2
 308     fi
 309 fi
 310
 311 # Update the index/work tree if requested
 312 if [[ $action == update-index ]] ; then
 313     grep -Ff $tmpdir/changed $tmpdir/filtered > $tmpdir/tohash
 314     cd $tmpdir/new
 315     IFS='
 316 '
 317     for change in `cut -f2 $tmpdir/tohash | \
 318                    git --git-dir=$srcdir/.git hash-object -w --stdin-paths --no-filters | \
 319                    paste - $tmpdir/tohash`
 320     do
 321         # NOTE: the patterns below contain literal tabs
 322         sha1=${change%% *}
 323         rest=${change#* }
 324         mode=${rest:8:6}
 325         path=${rest#*   }
 326         path=${path%%   *}
 327         # Contains a literal tab
 328         echo "$mode $sha1       $path" >> $tmpdir/toindex
 329     done
 330     unset IFS
 331     git --git-dir=$srcdir/.git update-index --index-info < $tmpdir/toindex
 332 elif [[ $action == update-workdir ]] ; then
 333     rsync --files-from=$tmpdir/changed $tmpdir/new/ $srcdir/
 334 fi
 335
 336 # Report what was done
 337 sort $tmpdir/messages
 338
 339 rm -rf $tmpdir
 340 exit $changes