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rcs2log
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1993-11-16
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382 lines
#!/bin/sh
# RCS to ChangeLog generator
# Generate a change log prefix from RCS/* and the existing ChangeLog (if any).
# Output the new prefix to standard output.
# You can edit this prefix by hand, and then prepend it to ChangeLog.
# Ignore log entries that start with `#'.
# Clump together log entries that start with `{topic} ',
# where `topic' contains neither white space nor `}'.
# Author: Paul Eggert <eggert@twinsun.com>
# $Id: rcs2log,v 1.12 1993/05/29 06:22:48 rms Exp $
# Copyright 1992, 1993 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; see the file COPYING. If not, write to
# the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
nl='
'
# Parse options.
# defaults
indent=8 # indent of log line
length=79 # suggested max width of log line
tabwidth=8 # width of horizontal tab
while :
do
case $1 in
-i) indent=${2?};;
-l) length=${2?};;
-t) tabwidth=${2?};;
-*) echo >&2 "$0: usage: $0 [-i indent] [-l length] [-t tabwidth] [file ...]"
exit 1;;
*) break
esac
shift; shift
done
month_data='
m[0]="Jan"; m[1]="Feb"; m[2]="Mar"
m[3]="Apr"; m[4]="May"; m[5]="Jun"
m[6]="Jul"; m[7]="Aug"; m[8]="Sep"
m[9]="Oct"; m[10]="Nov"; m[11]="Dec"
# days in non-leap year thus far, indexed by month (0-12)
mo[0]=0; mo[1]=31; mo[2]=59; mo[3]=90
mo[4]=120; mo[5]=151; mo[6]=181; mo[7]=212
mo[8]=243; mo[9]=273; mo[10]=304; mo[11]=334
mo[12]=365
'
# Log into $rlogout the revisions checked in since the first ChangeLog entry.
date=1970
if test -s ChangeLog
then
# Add 1 to seconds to avoid duplicating most recent log.
e='
/^... ... [ 0-9][0-9] [ 0-9][0-9]:[0-9][0-9]:[0-9][0-9] [0-9]+ /{
'"$month_data"'
year = $5
for (i=0; i<=11; i++) if (m[i] == $2) break
dd = $3
hh = substr($0,12,2)
mm = substr($0,15,2)
ss = substr($0,18,2)
ss++
if (ss == 60) {
ss = 0
mm++
if (mm == 60) {
mm = 0
hh++
if (hh == 24) {
hh = 0
dd++
monthdays = mo[i+1] - mo[i]
if (i == 1 && year%4 == 0 && (year%100 != 0 || year%400 == 0)) monthdays++
if (dd == monthdays + 1) {
dd = 1
i++
if (i == 12) {
i = 0
year++
}
}
}
}
}
printf "%d/%02d/%02d %02d:%02d:%02d\n", year, i+1, dd, hh, mm, ss
exit
}
'
d=`awk "$e" <ChangeLog` || exit
case $d in
?*) date=$d
esac
fi
datearg="-d>$date"
# With no arguments, examine all files under the RCS directory.
case $# in
0)
files=
for file in RCS/.* RCS/*
do
case $file in
RCS/. | RCS/..) ;;
RCS/.\* | RCS/\*) test -f "$file" && files=$files$nl$file;;
*) files=$files$nl$file
esac
done
case $files in
'') exit 0
esac
oldIFS=$IFS
IFS=$nl
set $files
IFS=$oldIFS
esac
rlogout=/tmp/chg$$
trap exit 1 2 13 15
trap 'rm -f $rlogout; exit 1' 0
rlog "$datearg" "$@" >$rlogout || exit
# Get the full name of each author the logs mention, and set initialize_fullname
# to awk code that initializes the `fullname' awk associative array.
# Warning: foreign authors (i.e. not known in the passwd file) are mishandled;
# you have to fix the resulting output by hand.
initialize_fullname=
authors=`
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 |
sort -u
`
case $authors in
?*)
initialize_author=
for author in $authors
do
initialize_author="$initialize_author
author[\"$author\"] = 1
"
done
awkscript='
BEGIN {
alphabet = "abcdefghijklmnopqrstuvwxyz"
ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
'"$initialize_author"'
}
{
if (author[$1]) {
fullname = $5
abbr = index(fullname, "&")
if (abbr) {
a = substr($1, 1, 1)
A = a
i = index(alphabet, a)
if (i) A = substr(ALPHABET, i, 1)
fullname = substr(fullname, 1, abbr-1) A substr($1, 2) substr(fullname, abbr+1)
}
printf "fullname[\"%s\"] = \"%s\"\n", $1, fullname
author[$1] = 0
}
}
'
initialize_fullname=`
(cat /etc/passwd; ypmatch $authors passwd) 2>/dev/null |
awk -F: "$awkscript"
`
esac
# Function to print a single log line.
# We don't use awk functions, to stay compatible with old awk versions.
# `Log' is the log message (with \n replaced by \r).
# `files' contains the affected files.
printlogline='{
# Following the GNU coding standards, rewrite
# * file: (function): comment
# to
# * file (function): comment
if (Log ~ /^\([^)]*\): /) {
i = index(Log, ")")
files = files " " substr(Log, 1, i)
Log = substr(Log, i+3)
}
# If "label: comment" is too long, break the line after the ":".
sep = " "
if ('"$length"' <= '"$indent"' + 1 + length(files) + index(Log, CR)) sep = "\n" indent_string
# Print the label.
printf "%s*%s:", indent_string, files
# Print each line of the log, transliterating \r to \n.
while ((i = index(Log, CR)) != 0) {
printf "%s%s\n", sep, substr(Log, 1, i-1)
sep = indent_string
Log = substr(Log, i+1)
}
}'
hostname=`(
hostname || cat /etc/whoami || uuname -l || uname -n
) 2>/dev/null` || {
echo >&2 "$0: cannot deduce hostname"
exit 1
}
# Process the rlog output, generating ChangeLog style entries.
# First, reformat the rlog output so that each line contains one log entry.
# Transliterate \n to \r so that multiline entries fit on a single line.
# Discard irrelevant rlog output.
awk <$rlogout '
/^Working file:/ { filename = $3 }
/^date: /, /^(-----------*|===========*)$/ {
if ($0 ~ /^branches: /) { next }
if ($0 ~ /^date: [0-9][ \/0-9:]*;/) {
time = substr($3, 1, length($3)-1)
author = substr($5, 1, length($5)-1)
printf "%s %s %s %s %c", filename, $2, time, author, 13
next
}
if ($0 ~ /^(-----------*|===========*)$/) { print ""; next }
printf "%s%c", $0, 13
}
' |
# Now each line is of the form
# FILENAME YYYY/MM/DD HH:MM:SS AUTHOR \rLOG
# where \r stands for a carriage return,
# and each line of the log is terminated by \r instead of \n.
# Sort the log entries, first by date+time (in reverse order),
# then by author, then by log entry, and finally by file name (just in case).
sort +1 -3r +3 +0 |
# Finally, reformat the sorted log entries.
awk '
BEGIN {
# Some awks do not understand "\r" or "\013", so we have to
# put a carriage return directly in the file.
CR="" # <-- There is a single CR between the " chars here.
# Initialize the fullname associative array.
'"$initialize_fullname"'
# Initialize indent string.
indent_string = ""
i = '"$indent"'
if (0 < '"$tabwidth"')
for (; '"$tabwidth"' <= i; i -= '"$tabwidth"')
indent_string = indent_string "\t"
while (1 <= i--)
indent_string = indent_string " "
# Set up date conversion tables.
# RCS uses a nice, clean, sortable format,
# but ChangeLog wants the traditional, ugly ctime format.
# January 1, 0 AD (Gregorian) was Saturday = 6
EPOCH_WEEKDAY = 6
# Of course, there was no 0 AD, but the algorithm works anyway.
w[0]="Sun"; w[1]="Mon"; w[2]="Tue"; w[3]="Wed"
w[4]="Thu"; w[5]="Fri"; w[6]="Sat"
'"$month_data"'
}
{
newlog = substr($0, 1 + index($0, CR))
# Ignore log entries prefixed by "#".
if (newlog ~ /^#/) { next }
if (Log != newlog || date != $2 || author != $4) {
# The previous log and this log differ.
# Print the old log.
if (date != "") '"$printlogline"'
# Logs that begin with "{clumpname} " should be grouped together,
# and the clumpname should be removed.
# Extract the new clumpname from the log header,
# and use it to decide whether to output a blank line.
newclumpname = ""
sep = "\n"
if (date == "") sep = ""
if (newlog ~ /^{[^ }]*}[ ]/) {
i = index(newlog, "}")
newclumpname = substr(newlog, 1, i)
while (substr(newlog, i+1) ~ /^[ ]/) i++
newlog = substr(newlog, i+1)
if (clumpname == newclumpname) sep = ""
}
printf sep
clumpname = newclumpname
# Get ready for the next log.
Log = newlog
if (files != "")
for (i in filesknown)
filesknown[i] = 0
files = ""
}
if (date != $2 || author != $4) {
# The previous date+author and this date+author differ.
# Print the new one.
date = $2
author = $4
# Convert nice RCS date like "1992/01/03 00:03:44"
# into ugly ctime date like "Fri Jan 3 00:03:44 1992".
# Calculate day of week from Gregorian calendar.
i = index($2, "/")
year = substr($2, 1, i-1) + 0
monthday = substr($2, i+1)
i = index(monthday, "/")
month = substr(monthday, 1, i-1) + 0
day = substr(monthday, i+1) + 0
leap = 0
if (2 < month && year%4 == 0 && (year%100 != 0 || year%400 == 0)) leap = 1
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
# Print "date fullname (email address)" if the fullname is known;
# print "date author" otherwise.
# Get the fullname from the associative array.
# The email address is just author@thishostname.
printf "%s %s %2d %s %d ", w[days_since_Sunday_before_epoch%7], m[month-1], day, $3, year
if (fullname[author])
printf "%s (%s@%s)\n\n", fullname[author], author, "'"$hostname"'"
else
printf "%s\n\n", author
}
if (! filesknown[$1]) {
filesknown[$1] = 1
if (files == "") files = " " $1
else files = files ", " $1
}
}
END {
# Print the last log.
if (date != "") {
'"$printlogline"'
printf "\n"
}
}
' &&
# Exit successfully.
exec rm -f $rlogout