Use ISO 8601 date format, with time zone appended if

change-log-time-zone-rule is non-nil, instead of traditional Unix date
format.

(datearg): When computing default from ChangeLog, handle ISO format dates
in addition to old-fashioned dates from Emacs 19.31 and earlier.  Don't
worry about hh:mm:ss since the resolution is now by day.  Use emtpy
datearg, not empty rlog_options, to decide whether to pass "$datearg"
option to $rlog.
(logTZ): New variable, set to TZ specified by change-log-time-zone-rule.
(month_data): Remove `mo'; no longer needed.
(rlog_options): Use -zLT for localltime output, if `rlog' supports it.
(extractTZ): Use UTC if the zone is t.

Match `revision' line of rlog output more accurately.

Add -c, -v options.

1 files changed, 91 insertions, 90 deletions

diff --git a/lib-src/rcs2log b/lib-src/rcs2log
index dcc8f472030..e9474f65ade 100755
--- a/lib-src/rcs2log
+++ b/lib-src/rcs2log
@@ -12,7 +12,7 @@
 
 # Author: Paul Eggert <eggert@twinsun.com>
 
-# $Id: rcs2log,v 1.27 1996/01/15 01:17:56 eggert Exp kwzh $
+# $Id: rcs2log,v 1.28 1996/07/20 18:08:03 kwzh Exp erik $
 
 # Copyright 1992, 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
 
@@ -20,12 +20,12 @@
 # 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 GNU Emacs; see the file COPYING.  If not, write to the
 # Free Software Foundation, Inc., 59 Temple Place - Suite 330,
@@ -40,18 +40,23 @@ nl='
 # defaults
 : ${AWK=awk}
 : ${TMPDIR=/tmp}
+changelog=ChangeLog # change log file name
+datearg= # rlog date option
 hostname= # name of local host (if empty, will deduce it later)
 indent=8 # indent of log line
 length=79 # suggested max width of log line
 logins= # login names for people we know fullnames and mailaddrs of
 loginFullnameMailaddrs= # login<tab>fullname<tab>mailaddr triplets
+logTZ= # time zone for log dates (if empty, use local time)
 recursive= # t if we want recursive rlog
+revision= # t if we want revision numbers
 rlog_options= # options to pass to rlog
 tabwidth=8 # width of horizontal tab
 
 while :
 do
 	case $1 in
+	-c)	changelog=${2?}; shift;;
 	-i)	indent=${2?}; shift;;
 	-h)	hostname=${2?}; shift;;
 	-l)	length=${2?}; shift;;
@@ -93,10 +98,12 @@ do
 	-r)	rlog_options=$rlog_options$nl${2?}; shift;;
 	-R)	recursive=t;;
 	-t)	tabwidth=${2?}; shift;;
+	-v)	revision=t;;
 	-*)	echo >&2 "$0: usage: $0 [options] [file ...]
 Options:
-	[-h hostname] [-i indent] [-l length] [-R] [-r rlog_option]
-	[-t tabwidth] [-u 'login<TAB>fullname<TAB>mailaddr']..."
+	[-c changelog] [-h hostname] [-i indent] [-l length] [-R]
+	[-r rlog_option] [-t tabwidth] [-v]
+	[-u 'login<TAB>fullname<TAB>mailaddr']..."
 		exit 1;;
 	*)	break
 	esac
@@ -108,12 +115,6 @@ month_data='
 	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
 '
 
 
@@ -121,50 +122,30 @@ month_data='
 
 # If no rlog options are given,
 # log the revisions checked in since the first ChangeLog entry.
+# Since ChangeLog is only by date, some of these revisions may be duplicates of
+# what's already in ChangeLog; it's the user's responsibility to remove them.
 case $rlog_options in
 '')
 	date=1970
-	if test -s ChangeLog
+	if test -s "$changelog"
 	then
-		# Add 1 to seconds to avoid duplicating most recent log.
 		e='
+			/^[0-9]+-[0-9][0-9]-[0-9][0-9]/{
+				# ISO 8601 date
+				print $1
+				exit
+			}
 			/^... ... [ 0-9][0-9] [ 0-9][0-9]:[0-9][0-9]:[0-9][0-9] [0-9]+ /{
+				# old-fashioned date and time (Emacs 19.31 and earlier)
 				'"$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($0,18,2)
-				ss++
-				if (ss == 60) {
-					ss = 0
-					mm++
-					if (mm == 60) {
-						mm = 0
-						hh++
-						if (hh == 24) {
-							hh = 0
-							dd++
-							monthdays = mo[i+1] - mo[i]
-							if (i == 1 && year%4 == 0 && (year%100 != 0 || year%400 == 0)) monthdays++
-							if (dd == monthdays + 1) {
-								dd = 1
-								i++
-								if (i == 12) {
-									i = 0
-									year++
-								}
-							}
-						}
-					}
-				}
-				# Output comma instead of space to avoid CVS 1.5 bug.
-				printf "%d/%02d/%02d,%02d:%02d:%02d\n", year,i+1,dd,hh,mm,ss
+				printf "%d-%02d-%02d\n", year, i+1, dd
 				exit
 			}
 		'
-		d=`$AWK "$e" <ChangeLog` || exit
+		d=`$AWK "$e" <"$changelog"` || exit
 		case $d in
 		?*) date=$d
 		esac
@@ -172,6 +153,29 @@ case $rlog_options in
 	datearg="-d>$date"
 esac
 
+# Use rlog's -zLT option, if rlog supports it.
+case `rlog -zLT 2>&1` in
+*'unknown option'*) ;;
+*) rlog_options=-zLT$nl$rlog_options
+esac
+
+# Use TZ specified by ChangeLog local variable, if any.
+if test -s "$changelog"
+then
+	extractTZ='
+		/^.*change-log-time-zone-rule['"$tab"' ]*:['"$tab"' ]*"\([^"]*\)".*/{
+			s//\1/; p; q
+		}
+		/^.*change-log-time-zone-rule['"$tab"' ]*:['"$tab"' ]*t.*/{
+			s//UTC0/; p; q
+		}
+	'
+	logTZ=`tail "$changelog" | sed -n "$extractTZ"`
+	case $logTZ in
+	?*) TZ=$logTZ; export TZ
+	esac
+fi
+
 # If CVS is in use, examine its repository, not the normal RCS files.
 if test ! -f CVS/Repository
 then
@@ -245,9 +249,9 @@ rlogout=$TMPDIR/rcs2log$$r
 trap exit 1 2 13 15
 trap "rm -f $llogout $rlogout; exit 1" 0
 
-case $rlog_options in
-?*) $rlog $rlog_options ${1+"$@"} >$rlogout;;
-'') $rlog "$datearg" ${1+"$@"} >$rlogout
+case $datearg in
+?*) $rlog $rlog_options "$datearg" ${1+"$@"} >$rlogout;;
+'') $rlog $rlog_options ${1+"$@"} >$rlogout
 esac || exit
 
 
@@ -413,6 +417,9 @@ printlogline='{
 	}
 }'
 
+# Pattern to match the `revision' line of rlog output.
+rlog_revision_pattern='^revision [0-9]+\.[0-9]+(\.[0-9]+\.[0-9]+)*(['"$tab"' ]+locked by: [^'"$tab"' $,.0-9:;@]*[^'"$tab"' $,:;@][^'"$tab"' $,.0-9:;@]*;)?['"$tab"' ]*$'
+
 case $hostname in
 '')
 	hostname=`(
@@ -450,43 +457,53 @@ $AWK <$rlogout '
 				filename = substr(filename, 1, length(filename) - 2)
 			}
 		}
+		rev = "?"
 	}
 	/^Working file:/ { if (repository == "") filename = $3 }
-	/^date: /, /^(-----------*|===========*)$/ {
-		if ($0 ~ /^branches: /) { next }
+	/'"$rlog_revision_pattern"'/, /^(-----------*|===========*)$/ {
+		if ($0 ~ /'"$rlog_revision_pattern"'/) {
+			rev = $2
+			next
+		}
 		if ($0 ~ /^date: [0-9][- +\/0-9:]*;/) {
 			date = $2
-			if (date ~ /-/) {
-				# An ISO format date.  Replace all "-"s with "/"s.
+			if (date ~ /\//) {
+				# This is a traditional RCS format date YYYY/MM/DD.
+				# Replace "/"s with "-"s to get ISO format.
 				newdate = ""
-				while ((i = index(date, "-")) != 0) {
-					newdate = newdate substr(date, 1, i-1) "/"
+				while ((i = index(date, "/")) != 0) {
+					newdate = newdate substr(date, 1, i-1) "-"
 					date = substr(date, i+1)
 				}
 				date = newdate date
 			}
-			# Ignore any time zone; ChangeLog has no room for it.
-			time = substr($3, 1, 8)
+			time = substr($3, 1, length($3) - 1)
 			author = substr($5, 1, length($5)-1)
-			printf "%s %s %s %s %c", filename, date, time, author, 13
+			printf "%s %s %s %s %s %c", filename, rev, date, time, author, 13
+			rev = "?"
 			next
 		}
+		if ($0 ~ /^branches: /) { 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
+# FILENAME REVISION YYYY-MM-DD HH:MM:SS[+-TIMEZONE] 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 |
+# then by author, then by log entry, and finally by file name and revision
+# (just in case).
+sort +2 -4r +4 +0 |
 
 # Finally, reformat the sorted log entries.
 $AWK '
 	BEGIN {
+		logTZ = "'"$logTZ"'"
+		revision = "'"$revision"'"
+
 		# Some awk variants 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.
@@ -503,19 +520,6 @@ $AWK '
 				indent_string = indent_string "\t"
 		while (1 <= i--)
 			indent_string = indent_string " "
-
-		# Set up date conversion tables.
-		# RCS uses a nice, clean, sortable format,
-		# but ChangeLog wants the traditional, ugly ctime format.
-
-		# January 1, 0 AD (Gregorian) was Saturday = 6
-		EPOCH_WEEKDAY = 6
-		# Of course, there was no 0 AD, but the algorithm works anyway.
-
-		w[0]="Sun"; w[1]="Mon"; w[2]="Tue"; w[3]="Wed"
-		w[4]="Thu"; w[5]="Fri"; w[6]="Sat"
-
-		'"$month_data"'
 	}
 
 	{
@@ -524,7 +528,7 @@ $AWK '
 		# Ignore log entries prefixed by "#".
 		if (newlog ~ /^#/) { next }
 
-		if (Log != newlog || date != $2 || author != $4) {
+		if (Log != newlog || date != $3 || author != $5) {
 
 			# The previous log and this log differ.
 
@@ -555,33 +559,25 @@ $AWK '
 					filesknown[i] = 0
 			files = ""
 		}
-		if (date != $2  ||  author != $4) {
+		if (date != $3  ||  author != $5) {
 			# 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)".
+			date = $3
+			time = $4
+			author = $5
+
+			zone = ""
+			if (logTZ && ((i = index(time, "-")) || (i = index(time, "+"))))
+				zone = " " substr(time, i)
+
+			# Print "date[ timezone]  fullname  <email address>".
 			# Get fullname and email address from associative arrays;
 			# default to author and author@hostname if not in arrays.
 			if (fullname[author])
 				auth = fullname[author]
 			else
 				auth = author
-			printf "%s %s %2d %s %d  %s  ", w[days_since_Sunday_before_epoch%7], m[month-1], day, $3, year, auth
+			printf "%s%s  %s  ", date, zone, auth
 			if (mailaddr[author])
 				printf "<%s>\n\n", mailaddr[author]
 			else
@@ -591,6 +587,7 @@ $AWK '
 			filesknown[$1] = 1
 			if (files == "") files = " " $1
 			else files = files ", " $1
+			if (revision && $2 != "?") files = files " " $2
 		}
 	}
 	END {
@@ -606,3 +603,7 @@ $AWK '
 # Exit successfully.
 
 exec rm -f $llogout $rlogout
+
+# Local Variables:
+# tab-width:4
+# End: