lib-src/rcs2log

   1 #!/bin/sh
   2
   3 # RCS to ChangeLog generator
   4
   5 # Generate a change log prefix from RCS/* and the existing ChangeLog (if any).
   6 # Output the new prefix to standard output.
   7 # You can edit this prefix by hand, and then prepend it to ChangeLog.
   8
   9 # Ignore log entries that start with `#'.
  10 # Clump together log entries that start with `{topic} ',
  11 # where `topic' contains neither white space nor `}'.
  12
  13 # Author: Paul Eggert <eggert@twinsun.com>
  14
  15 # $Id: rcs2log,v 1.11 1993/05/03 17:55:22 eggert Exp rms $
  16
  17 # Copyright 1992, 1993 Free Software Foundation, Inc.
  18
  19 # This program is free software; you can redistribute it and/or modify
  20 # it under the terms of the GNU General Public License as published by
  21 # the Free Software Foundation; either version 2, or (at your option)
  22 # any later version.
  23 #
  24 # This program is distributed in the hope that it will be useful,
  25 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  26 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27 # GNU General Public License for more details.
  28 #
  29 # You should have received a copy of the GNU General Public License
  30 # along with this program; see the file COPYING.  If not, write to
  31 # the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  32
  33 nl='
  34 '
  35
  36 # Parse options.
  37
  38 # defaults
  39 indent=8 # indent of log line
  40 length=79 # suggested max width of log line
  41 tabwidth=8 # width of horizontal tab
  42
  43 while :
  44 do
  45         case $1 in
  46         -i)     indent=${2?};;
  47         -l)     length=${2?};;
  48         -t)     tabwidth=${2?};;
  49         -*)     echo >&2 "$0: usage: $0 [-i indent] [-l length] [-t tabwidth] [file ...]"
  50                 exit 1;;
  51         *)      break
  52         esac
  53         shift; shift
  54 done
  55
  56 month_data='
  57         m[0]="Jan"; m[1]="Feb"; m[2]="Mar"
  58         m[3]="Apr"; m[4]="May"; m[5]="Jun"
  59         m[6]="Jul"; m[7]="Aug"; m[8]="Sep"
  60         m[9]="Oct"; m[10]="Nov"; m[11]="Dec"
  61
  62         # days in non-leap year thus far, indexed by month (0-12)
  63         mo[0]=0; mo[1]=31; mo[2]=59; mo[3]=90
  64         mo[4]=120; mo[5]=151; mo[6]=181; mo[7]=212
  65         mo[8]=243; mo[9]=273; mo[10]=304; mo[11]=334
  66         mo[12]=365
  67 '
  68
  69
  70 # Log into $rlogout the revisions checked in since the first ChangeLog entry.
  71
  72 date=1970
  73 if test -s ChangeLog
  74 then
  75         # Add 1 to seconds to avoid duplicating most recent log.
  76         e='
  77                 /^... ... [ 0-9][0-9] [ 0-9][0-9]:[0-9][0-9]:[0-9][0-9] [0-9]+ /{
  78                         '"$month_data"'
  79                         year = $5
  80                         for (i=0; i<=11; i++) if (m[i] == $2) break
  81                         dd = $3
  82                         hh = substr($0,12,2)
  83                         mm = substr($0,15,2)
  84                         ss = substr($0,18,2)
  85                         ss++
  86                         if (ss == 60) {
  87                                 ss = 0
  88                                 mm++
  89                                 if (mm == 60) {
  90                                         mm = 0
  91                                         hh++
  92                                         if (hh == 24) {
  93                                                 hh = 0
  94                                                 dd++
  95                                                 monthdays = mo[i+1] - mo[i]
  96                                                 if (i == 1 && year%4 == 0 && (year%100 != 0 || year%400 == 0)) monthdays++
  97                                                 if (dd == monthdays + 1) {
  98                                                         dd = 1
  99                                                         i++
 100                                                         if (i == 12) {
 101                                                                 i = 0
 102                                                                 year++
 103                                                         }
 104                                                 }
 105                                         }
 106                                 }
 107                         }
 108                         printf "%d/%02d/%02d %02d:%02d:%02d\n", year, i+1, dd, hh, mm, ss
 109                         exit
 110                 }
 111         '
 112         d=`awk "$e" <ChangeLog` || exit
 113         case $d in
 114         ?*) date=$d
 115         esac
 116 fi
 117 datearg="-d>$date"
 118
 119 # With no arguments, examine all files under the RCS directory.
 120 case $# in
 121 0)
 122         files=
 123         for file in RCS/.* RCS/*
 124         do
 125                 case $file in
 126                 RCS/. | RCS/..) ;;
 127                 RCS/.\* | RCS/\*) test -f "$file" && files=$files$nl$file;;
 128                 *) files=$files$nl$file
 129                 esac
 130         done
 131         case $files in
 132         '') exit 0
 133         esac
 134         oldIFS=$IFS
 135         IFS=$nl
 136         set $files
 137         IFS=$oldIFS
 138 esac
 139
 140 rlogout=/tmp/chg$$
 141 trap exit 1 2 13 15
 142 trap 'rm -f $rlogout; exit 1' 0
 143
 144 rlog "$datearg" "$@" >$rlogout || exit
 145
 146
 147 # Get the full name of each author the logs mention, and set initialize_fullname
 148 # to awk code that initializes the `fullname' awk associative array.
 149 # Warning: foreign authors (i.e. not known in the passwd file) are mishandled;
 150 # you have to fix the resulting output by hand.
 151
 152 initialize_fullname=
 153 authors=`
 154         sed -n 's|^date: *[0-9]*/[0-9][0-9]/[0-9][0-9] [0-9][0-9]:[0-9][0-9]:[0-9][0-9]; *author: *\([^; ]*\).*|\1|p' <$rlogout |
 155         sort -u
 156 `
 157 case $authors in
 158 ?*)
 159         initialize_author=
 160         for author in $authors
 161         do
 162                 initialize_author="$initialize_author
 163                         author[\"$author\"] = 1
 164                 "
 165         done
 166
 167         awkscript='
 168                 BEGIN {
 169                         alphabet = "abcdefghijklmnopqrstuvwxyz"
 170                         ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
 171                         '"$initialize_author"'
 172                 }
 173                 {
 174                         if (author[$1]) {
 175                                 fullname = $5
 176                                 abbr = index(fullname, "&")
 177                                 if (abbr) {
 178                                         a = substr($1, 1, 1)
 179                                         A = a
 180                                         i = index(alphabet, a)
 181                                         if (i) A = substr(ALPHABET, i, 1)
 182                                         fullname = substr(fullname, 1, abbr-1) A substr($1, 2) substr(fullname, abbr+1)
 183                                 }
 184                                 printf "fullname[\"%s\"] = \"%s\"\n", $1, fullname
 185                                 author[$1] = 0
 186                         }
 187                 }
 188         '
 189
 190         initialize_fullname=`
 191                 (cat /etc/passwd; ypmatch $authors passwd) 2>/dev/null |
 192                 awk -F: "$awkscript"
 193         `
 194 esac
 195
 196
 197 # Function to print a single log line.
 198 # We don't use awk functions, to stay compatible with old awk versions.
 199 # `Log' is the log message (with \n replaced by \r).
 200 # `files' contains the affected files.
 201 printlogline='{
 202
 203         # Following the GNU coding standards, rewrite
 204         #       * file: (function): comment
 205         # to
 206         #       * file (function): comment
 207         if (Log ~ /^\([^)]*\): /) {
 208                 i = index(Log, ")")
 209                 files = files " " substr(Log, 1, i)
 210                 Log = substr(Log, i+3)
 211         }
 212
 213         # If "label: comment" is too long, break the line after the ":".
 214         sep = " "
 215         if ('"$length"' <= '"$indent"' + 1 + length(files) + index(Log, CR)) sep = "\n" indent_string
 216
 217         # Print the label.
 218         printf "%s*%s:", indent_string, files
 219
 220         # Print each line of the log, transliterating \r to \n.
 221         while ((i = index(Log, CR)) != 0) {
 222                 printf "%s%s\n", sep, substr(Log, 1, i-1)
 223                 sep = indent_string
 224                 Log = substr(Log, i+1)
 225         }
 226 }'
 227
 228 hostname=`(
 229         hostname || cat /etc/whoami || uuname -l || uname -n
 230 ) 2>/dev/null` || {
 231         echo >&2 "$0: cannot deduce hostname"
 232         exit 1
 233 }
 234
 235
 236 # Process the rlog output, generating ChangeLog style entries.
 237
 238 # First, reformat the rlog output so that each line contains one log entry.
 239 # Transliterate \n to \r so that multiline entries fit on a single line.
 240 # Discard irrelevant rlog output.
 241 awk <$rlogout '
 242         /^Working file:/ { filename = $3 }
 243         /^date: /, /^(-----------*|===========*)$/ {
 244                 if ($0 ~ /^branches: /) { next }
 245                 if ($0 ~ /^date: [0-9][ \/0-9:]*;/) {
 246                         time = substr($3, 1, length($3)-1)
 247                         author = substr($5, 1, length($5)-1)
 248                         printf "%s %s %s %s %c", filename, $2, time, author, 13
 249                         next
 250                 }
 251                 if ($0 ~ /^(-----------*|===========*)$/) { print ""; next }
 252                 printf "%s%c", $0, 13
 253         }
 254 ' |
 255
 256 # Now each line is of the form
 257 # FILENAME YYYY/MM/DD HH:MM:SS AUTHOR \rLOG
 258 #       where \r stands for a carriage return,
 259 #       and each line of the log is terminated by \r instead of \n.
 260 # Sort the log entries, first by date+time (in reverse order),
 261 # then by author, then by log entry, and finally by file name (just in case).
 262 sort +1 -3r +3 +0 |
 263
 264 # Finally, reformat the sorted log entries.
 265 awk '
 266         BEGIN {
 267                 # Some awks do not understand "\r" or "\013", so we have to
 268                 # put a carriage return directly in the file.
 269                 CR="
" # <-- There is a single CR between the " chars here.
 270
 271                 # Initialize the fullname associative array.
 272                 '"$initialize_fullname"'
 273
 274                 # Initialize indent string.
 275                 indent_string = ""
 276                 i = '"$indent"'
 277                 if (0 < '"$tabwidth"')
 278                         for (;  '"$tabwidth"' <= i;  i -= '"$tabwidth"')
 279                                 indent_string = indent_string "\t"
 280                 while (1 <= i--)
 281                         indent_string = indent_string " "
 282
 283                 # Set up date conversion tables.
 284                 # RCS uses a nice, clean, sortable format,
 285                 # but ChangeLog wants the traditional, ugly ctime format.
 286
 287                 # January 1, 0 AD (Gregorian) was Saturday = 6
 288                 EPOCH_WEEKDAY = 6
 289                 # Of course, there was no 0 AD, but the algorithm works anyway.
 290
 291                 w[0]="Sun"; w[1]="Mon"; w[2]="Tue"; w[3]="Wed"
 292                 w[4]="Thu"; w[5]="Fri"; w[6]="Sat"
 293
 294                 '"$month_data"'
 295         }
 296
 297         {
 298                 newlog = substr($0, 1 + index($0, CR))
 299
 300                 # Ignore log entries prefixed by "#".
 301                 if (newlog ~ /^#/) { next }
 302
 303                 if (Log != newlog || date != $2 || author != $4) {
 304
 305                         # The previous log and this log differ.
 306
 307                         # Print the old log.
 308                         if (date != "") '"$printlogline"'
 309
 310                         # Logs that begin with "{clumpname} " should be grouped together,
 311                         # and the clumpname should be removed.
 312                         # Extract the new clumpname from the log header,
 313                         # and use it to decide whether to output a blank line.
 314                         newclumpname = ""
 315                         sep = "\n"
 316                         if (date == "") sep = ""
 317                         if (newlog ~ /^{[^       }]*}[   ]/) {
 318                                 i = index(newlog, "}")
 319                                 newclumpname = substr(newlog, 1, i)
 320                                 while (substr(newlog, i+1) ~ /^[         ]/) i++
 321                                 newlog = substr(newlog, i+1)
 322                                 if (clumpname == newclumpname) sep = ""
 323                         }
 324                         printf sep
 325                         clumpname = newclumpname
 326
 327                         # Get ready for the next log.
 328                         Log = newlog
 329                         if (files != "")
 330                                 for (i in filesknown)
 331                                         filesknown[i] = 0
 332                         files = ""
 333                 }
 334                 if (date != $2  ||  author != $4) {
 335                         # The previous date+author and this date+author differ.
 336                         # Print the new one.
 337                         date = $2
 338                         author = $4
 339
 340                         # Convert nice RCS date like "1992/01/03 00:03:44"
 341                         # into ugly ctime date like "Fri Jan  3 00:03:44 1992".
 342                         # Calculate day of week from Gregorian calendar.
 343                         i = index($2, "/")
 344                         year = substr($2, 1, i-1) + 0
 345                         monthday = substr($2, i+1)
 346                         i = index(monthday, "/")
 347                         month = substr(monthday, 1, i-1) + 0
 348                         day = substr(monthday, i+1) + 0
 349                         leap = 0
 350                         if (2 < month && year%4 == 0 && (year%100 != 0 || year%400 == 0)) leap = 1
 351                         days_since_Sunday_before_epoch = EPOCH_WEEKDAY + year * 365 + int((year + 3) / 4) - int((year + 99) / 100) + int((year + 399) / 400) + mo[month-1] + leap + day - 1
 352
 353                         # Print "date  fullname  (email address)" if the fullname is known;
 354                         # print "date  author" otherwise.
 355                         # Get the fullname from the associative array.
 356                         # The email address is just author@thishostname.
 357                         printf "%s %s %2d %s %d  ", w[days_since_Sunday_before_epoch%7], m[month-1], day, $3, year
 358                         if (fullname[author])
 359                                 printf "%s  (%s@%s)\n\n", fullname[author], author, "'"$hostname"'"
 360                         else
 361                                 printf "%s\n\n", author
 362                 }
 363                 if (! filesknown[$1]) {
 364                         filesknown[$1] = 1
 365                         if (files == "") files = " " $1
 366                         else files = files ", " $1
 367                 }
 368         }
 369         END {
 370                 # Print the last log.
 371                 if (date != "") {
 372                         '"$printlogline"'
 373                         printf "\n"
 374                 }
 375         }
 376 ' &&
 377
 378
 379 # Exit successfully.
 380
 381 exec rm -f $rlogout