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rfcdiff-tmpl
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rfcdiff-tmpl
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#!/bin/bash
#
# Synopsis:
# Show changes between 2 internet-drafts using changebars or html
# side-by-side diff.
#
# Usage:
# rfcdiff [options] file1 file2
#
# rfcdiff takes two RFCs or Internet-Drafts in text form as input, and
# produces output which indicates the differences found in one of various
# forms, controlled by the options listed below. In all cases, page
# headers and page footers are stripped before looking for changes.
#
# --html Produce side-by-side .html diff (default)
#
# --chbars Produce changebar marked .txt output
#
# --diff Produce a regular diff output
#
# --wdiff Produce paged wdiff output
#
# --hwdiff Produce html-wrapped coloured wdiff output
#
# --oldcolour COLOURNAME Colour for new file in hwdiff (default is "green")
# --oldcolor COLORNAME Color for old file in hwdiff (default is "red")
#
# --newcolour COLOURNAME Colour for new file in hwdiff (default is "green")
# --newcolor COLORNAME Color for new file in hwdiff (default is "green")
#
# --larger Make difference text in hwdiff slightly larger
#
# --browse Show html output in browser
#
# --keep Don't delete temporary workfiles
#
# --version Show version
#
# --help Show this help
#
# --info "Synopsis|Usage|Copyright|Description|Log"
# Show various info
#
# --width N Set a maximum width of N characters for the
# display of each half of the old/new html diff
#
# --linenum Show linenumbers for each line, not only at the
# start of each change section
#
# --body Strip document preamble (title, boilerplate and
# table of contents) and postamble (Intellectual
# Property Statement, Disclaimer etc)
#
# --nostrip Don't strip headers and footers (or body)
#
# --ab-diff Before/After diff, suitable for rfc-editor
# --abdiff
#
# --stdout Send output to stdout instead to a file
#
#
# Copyright:
# -----------------------------------------------------------------
#
# Copyright 2002 Henrik Levkowetz
#
# 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 of the License, 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; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# -----------------------------------------------------------------
#
# Description:
#
# The purpose of this program is to compare two versions of an
# internet-draft, and as output produce a diff in one of several
# formats:
#
# - side-by-side html diff
# - paged wdiff output in a text terminal
# - a text file with changebars in the left margin
# - a simple unified diff output
#
# In all cases, internet-draft headers and footers are stripped before
# generating the diff, to produce a cleaner diff.
#
# It is called as
#
# rfcdiff first-file second-file
#
# The latest version is available from
# http://tools.ietf.org/tools/rfcdiff/
#
export version="1.42"
export progdate=""
export prelines="10"
export basename=$(basename $0)
export workdir="/tmp/$basename-$$"
export pagecache1="$workdir/pagecache1"
export pagecache2="$workdir/pagecache2"
# ----------------------------------------------------------------------
# Utility to find an executable
# ----------------------------------------------------------------------
lookfor() {
for b in "$@"; do
found=$(which "$b" 2>/dev/null)
if [ -n "$found" ]; then
if [ -x "$found" ]; then
echo "$found"
return
fi
fi
done
}
AWK=$(lookfor gawk nawk awk)
# ----------------------------------------------------------------------
# Strip headers footers and formfeeds from infile to stdout
# ----------------------------------------------------------------------
strip() {
$AWK '
{ gsub(/\r/, ""); }
{ gsub(/[ \t]+$/, ""); }
{ pagelength++; }
/\[?[Pp]age [0-9ivx]+\]?[ \t\f]*$/ {
match($0, /[Pp]age [0-9ivx]+/);
num = substr($0, RSTART+5, RLENGTH-5);
print num, outline > ENVIRON["pagecache" ENVIRON["which"]]
pagelength = 0;
}
/\f/ { newpage=1;
pagelength=1;
}
/\f$/ {
# a form feed followed by a \n does not contribute to the
# line count. (But a \f followed by something else does.)
pagelength--;
}
/\f/ { next; }
/\[?[Pp]age [0-9ivx]+\]?[ \t\f]*$/ { preindent = indent; next; }
/^ *Internet.Draft.+[12][0-9][0-9][0-9] *$/ && (FNR > 15) { newpage=1; next; }
/^ *INTERNET.DRAFT.+[12][0-9][0-9][0-9] *$/ && (FNR > 15) { newpage=1; next; }
/^ *Draft.+( +)[12][0-9][0-9][0-9] *$/ && (FNR > 15) { newpage=1; next; }
/^RFC[ -]?[0-9]+.*( +).* [12][0-9][0-9][0-9]$/ && (FNR > 15) { newpage=1; next; }
/^draft-[-a-z0-9_.]+.*[0-9][0-9][0-9][0-9]$/ && (FNR > 15) { newpage=1; next; }
/(Jan|Feb|Mar|March|Apr|April|May|Jun|June|Jul|July|Aug|Sep|Oct|Nov|Dec) (19[89][0-9]|20[0-9][0-9]) *$/ && pagelength < 3 { newpage=1; next; }
newpage && $0 ~ /^ *draft-[-a-z0-9_.]+ *$/ { newpage=1; next; }
/^[ \t]+\[/ { sentence=1; }
/[^ \t]/ {
indent = match($0, /[^ ]/);
if (indent < preindent) {
sentence = 1;
}
if (newpage) {
if (sentence) {
outline++; print "";
}
} else {
if (haveblank) {
outline++; print "";
}
}
haveblank=0;
sentence=0;
newpage=0;
line = $0;
sub(/^ *\t/, " ", line);
thiscolumn = match(line, /[^ ]/);
}
/[.:][ \t]*$/ { sentence=1; }
/\(http:\/\/trustee\.ietf\.org\/license-info\)\./ { sentence=0; }
/^[ \t]*$/ { haveblank=1; next; }
{ outline++; print; }
' "$1"
}
# ----------------------------------------------------------------------
# Strip preamble (title, boilerplate and table of contents) and
# postamble (Intellectual Property Statement, Disclaimer etc)
# ----------------------------------------------------------------------
bodystrip() {
$AWK '
/^[ \t]*Acknowledgment/ { inbody = 0; }
/^(Full )*Copyright Statement$/ { inbody = 0; }
/^[ \t]*Disclaimer of Validid/ { inbody = 0; }
/^[ \t]*Intellectual Property/ { inbody = 0; }
/^Abstract$/ { inbody = 0; }
/^Table of Contents$/ { inbody = 0; }
/^1.[ \t]*Introduction$/ { inbody = 1; }
inbody { print; }
' "$1"
}
# ----------------------------------------------------------------------
# From two words, find common prefix and differing part, join descriptively
# ----------------------------------------------------------------------
worddiff() {
$AWK '
BEGIN {
w1 = ARGV[1]
w2 = ARGV[2]
format = ARGV[3]
do {
if (substr(w1,1,1) == substr(w2,1,1)) {
w1 = substr(w1,2)
w2 = substr(w2,2)
} else {
break;
}
prefixlen++;
} while (length(w1) && length(w2))
prefix = substr(ARGV[1],1,prefixlen);
do {
l1 = length(w1);
l2 = length(w2);
if (substr(w1,l1,1) == substr(w2,l2,1)) {
w1 = substr(w1,1,l1-1)
w2 = substr(w2,1,l2-1)
} else {
break;
}
} while (l1 && l2)
suffix = substr(ARGV[1], prefixlen+length(w1))
printf format, prefix, w1, w2, suffix;
}
' "$1" "$2" "$3"
}
# ----------------------------------------------------------------------
# Generate a html page with side-by-side diff from a unified diff
# ----------------------------------------------------------------------
htmldiff() {
$AWK '
BEGIN {
FS = "[ \t,]";
# Read pagecache1
maxpage[1] = 1
pageend[1,0] = 2;
while ( getline < ENVIRON["pagecache1"] > 0) {
pageend[1,$1] = $2;
if ($1+0 > maxpage[1]) maxpage[1] = $1+0;
}
# Read pagecache2
maxpage[2] = 1
pageend[2,0] = 2;
while ( getline < ENVIRON["pagecache2"] > 0) {
pageend[2,$1] = $2;
if ($1+0 > maxpage[2]) maxpage[2] = $1+0;
}
wdiff = ENVIRON["wdiffbin"]
base1 = ENVIRON["base1"]
base2 = ENVIRON["base2"]
optwidth = ENVIRON["optwidth"]
optnums = ENVIRON["optnums"]
optlinks = ENVIRON["optlinks"]
cmdline = ENVIRON["cmdline"]
gsub("--", "- -", cmdline)
ENVIRON["cmdline"] = cmdline
header(base1, base2)
difflines1 = 0
difflines2 = 0
}
function header(file1, file2) {
url1 = file1;
url2 = file2;
if (optlinks) {
if (file1 ~ /^draft-/) { url1 = sprintf("<a href=\"https://tools.ietf.org/html/%s\" style=\"color:#008\">%s</a>", file1, file1); }
if (file1 ~ /^draft-/) { prev = sprintf("<a href=\"/rfcdiff?url2=%s\" style=\"color:#008; text-decoration:none;\"><</a>", file1); }
if (file2 ~ /^draft-/) { url2 = sprintf("<a href=\"https://tools.ietf.org/html/%s\" style=\"color:#008\">%s</a>", file2, file2); }
if (file2 ~ /^draft-/) { nxt = sprintf("<a href=\"/rfcdiff?url1=%s\" style=\"color:#008; text-decoration:none;\">></a>", file2) }
}
printf "" \
"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\"> \n" \
"<!-- Generated by rfcdiff %s: rfcdiff %s --> \n" \
"<!-- <!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01 Transitional\" > -->\n" \
"<!-- System: %s --> \n" \
"<!-- Using awk: %s: %s --> \n" \
"<!-- Using diff: %s: %s --> \n" \
"<!-- Using wdiff: %s: %s --> \n" \
"<html> \n" \
"<head> \n" \
" <meta http-equiv=\"Content-Type\" content=\"text/html; charset=iso-8859-1\" /> \n" \
" <meta http-equiv=\"Content-Style-Type\" content=\"text/css\" /> \n" \
" <title>Diff: %s - %s</title> \n" \
" <style type=\"text/css\"> \n" \
" body { margin: 0.4ex; margin-right: auto; } \n" \
" tr { } \n" \
" td { white-space: pre; font-family: monospace; vertical-align: top; font-size: 0.86em;} \n" \
" th { font-size: 0.86em; } \n" \
" .small { font-size: 0.6em; font-style: italic; font-family: Verdana, Helvetica, sans-serif; } \n" \
" .left { background-color: #EEE; } \n" \
" .right { background-color: #FFF; } \n" \
" .diff { background-color: #CCF; } \n" \
" .lblock { background-color: #BFB; } \n" \
" .rblock { background-color: #FF8; } \n" \
" .insert { background-color: #8FF; } \n" \
" .delete { background-color: #ACF; } \n" \
" .void { background-color: #FFB; } \n" \
" .cont { background-color: #EEE; } \n" \
" .linebr { background-color: #AAA; } \n" \
" .lineno { color: red; background-color: #FFF; font-size: 0.7em; text-align: right; padding: 0 2px; } \n" \
" .elipsis{ background-color: #AAA; } \n" \
" .left .cont { background-color: #DDD; } \n" \
" .right .cont { background-color: #EEE; } \n" \
" .lblock .cont { background-color: #9D9; } \n" \
" .rblock .cont { background-color: #DD6; } \n" \
" .insert .cont { background-color: #0DD; } \n" \
" .delete .cont { background-color: #8AD; } \n" \
" .stats, .stats td, .stats th { background-color: #EEE; padding: 2px 0; } \n" \
" </style> \n" \
" %s \n" \
"</head> \n" \
"<body > \n" \
" <table border=\"0\" cellpadding=\"0\" cellspacing=\"0\"> \n" \
" <tr bgcolor=\"orange\"><th></th><th>%s %s </th><th> </th><th> %s %s</th><th></th></tr> \n" \
"", ENVIRON["version"], ENVIRON["cmdline"], ENVIRON["uname"], ENVIRON["awkbin"], ENVIRON["awkver"], ENVIRON["diffbin"], ENVIRON["diffver"], ENVIRON["wdiffbin"], ENVIRON["wdiffver"], file1, file2, ENVIRON["jsinc"], prev, url1, url2, nxt;
}
function worddiff(w1, w2) {
prefixlen = 0;
word1 = w1;
do {
if (substr(w1,1,1) == substr(w2,1,1)) {
w1 = substr(w1,2);
w2 = substr(w2,2);
} else {
break;
}
prefixlen++;
} while (length(w1) && length(w2));
prefix = substr(word1,1,prefixlen);
do {
l1 = length(w1);
l2 = length(w2);
if (substr(w1,l1,1) == substr(w2,l2,1)) {
w1 = substr(w1,1,l1-1);
w2 = substr(w2,1,l2-1);
} else {
break;
}
} while (l1 && l2);
suffix = substr(word1, prefixlen+length(w1)+1);
wordpart[0] = prefix;
wordpart[1] = w1;
wordpart[2] = w2;
wordpart[3] = suffix;
}
function numdisplay(which, line) {
if (optnums && (line != prevline[which])) {
prevline[which] = line;
return line-1;
}
return "";
}
function fixesc(line) {
# Making this a no-op for now -- the change in line-breaking
# "<br><span...>" => "\n" should make this less necessary.
# line = gensub(/&(<[^>]*>)/, "\\1\\&", "g", line);
# We still have to handle cases where we have a broken up "<" / ">"
gsub(/&l<\/span>t;/, "\\<</span>", line);
gsub(/&g<\/span>t;/, "\\></span>", line);
gsub(/&<span class="delete">amp;/, "<span class=\"delete\">\\&", line)
gsub(/&<span class="insert">amp;/, "<span class=\"insert\">\\&", line)
gsub(/&<span class="delete">lt;/, "<span class=\"delete\">\\<", line);
gsub(/&<span class="delete">gt;/, "<span class=\"delete\">\\>", line);
gsub(/&<span class="insert">lt;/, "<span class=\"insert\">\\<", line);
gsub(/&<span class="insert">gt;/, "<span class=\"insert\">\\>", line);
gsub(/&<span class="delete">l<\/span>t;/, "<span class=\"delete\">\\<</span>", line);
gsub(/&<span class="delete">g<\/span>t;/, "<span class=\"delete\">\\></span>", line);
gsub(/&<span class="insert">l<\/span>t;/, "<span class=\"insert\">\\<</span>", line);
gsub(/&<span class="insert">g<\/span>t;/, "<span class=\"insert\">\\></span>", line);
return line;
}
function chunkdiff(chunk) {
if (difflines1 == 0 && difflines2 == 0) return;
chunkfile1= sprintf("1/chunk%04d", chunk);
chunkfile2= sprintf("2/chunk%04d", chunk);
printf "" > chunkfile1;
printf "" > chunkfile2;
for (l = 0; l < difflines1; l++) { print stack1[l] >> chunkfile1; }
for (l = 0; l < difflines2; l++) { print stack2[l] >> chunkfile2; }
close(chunkfile1);
close(chunkfile2);
cmd1 = sprintf("%s -n -2 -w \"<span class=\\\"delete\\\">\" -x \"</span>\" %s %s", wdiff, chunkfile1, chunkfile2);
cmd2 = sprintf("%s -n -1 -y \"<span class=\\\"insert\\\">\" -z \"</span>\" %s %s", wdiff, chunkfile1, chunkfile2);
l=0; while (cmd1 | getline > 0) { stack1[l] = fixesc($0); l++; }
difflines1 = l;
l=0; while (cmd2 | getline > 0) { stack2[l] = fixesc($0); l++; }
difflines2 = l;
close(cmd1);
close(cmd2);
}
function flush() {
if (difflines1 || difflines2) {
difftag++;
multiline = (difflines1 > 1) || (difflines2 > 1);
if (multiline && (wdiff != "")) chunkdiff(difftag);
printf " <tr><td><a name=\"diff%04d\" /></td></tr>\n", difftag;
for (l = 0; l < difflines1 || l < difflines2; l++) {
if (l in stack1) {
line1 = stack1[l];
delete stack1[l];
linenum1++
if (line1 == "")
if (optwidth > 0) {
line1 = substr(" ",0,optwidth);
} else {
line1 = " ";
}
} else {
line1 = "";
}
if (l in stack2) {
line2 = stack2[l];
delete stack2[l];
linenum2++;
if (line2 == "")
if (optwidth > 0) {
line2 = substr(" ",0,optwidth);
} else {
line2 = " ";
}
} else {
line2 = "";
}
if (!multiline || (wdiff == "")) {
worddiff(line1, line2);
line1 = fixesc(sprintf("%s<span class=\"delete\">%s</span>%s", wordpart[0], wordpart[1], wordpart[3]));
line2 = fixesc(sprintf("%s<span class=\"insert\">%s</span>%s", wordpart[0], wordpart[2], wordpart[3]));
# Clean up; remove empty spans
sub(/<span class="delete"><\/span>/,"", line1);
sub(/<span class="insert"><\/span>/,"", line2);
}
left = sprintf("<td class=\"lineno\" valign=\"top\">%s</td><td class=\"lblock\">%s</td>", numdisplay(1, linenum1), line1);
right = sprintf("<td class=\"rblock\">%s</td><td class=\"lineno\" valign=\"top\">%s</td>", line2, numdisplay(2, linenum2));
printf " <tr>%s<td> </td>%s</tr>\n", left, right;
}
}
}
function getpage(which, line) {
line = line + ENVIRON["prelines"];
page = "?";
for (p=1; p <= maxpage[which]; p++) {
if (pageend[which,p] == 0) continue;
if (line <= pageend[which,p]) {
page = p;
break;
}
}
return page;
}
function getpageline(which, line, page) {
if (page == "?") {
return line + ENVIRON["prelines"];
} else {
if (pageend[which,page-1]+0 != 0) {
return line + ENVIRON["prelines"] - pageend[which,page-1] + 3; # numbers of header lines stripped
} else {
return "?";
}
}
}
function htmlesc(line) {
gsub("&", "\\&", line);
gsub("<", "\\<", line);
gsub(">", "\\>", line);
return line;
}
function expandtabs(line) {
spaces = " ";
while (pos = index(line, "\t")) {
sub("\t", substr(spaces, 0, (8-pos%8)), line);
}
return line;
}
function maybebreakline(line, width) {
width = optwidth;
new = "";
if (width > 0) {
line = expandtabs(line);
while (length(line) > width) {
new = new htmlesc(substr(line, 1, width)) "\n";
line = substr(line, width+1);
}
}
line = new htmlesc(line) ;
return line;
}
/^@@/ {
linenum1 = 0 - $2;
linenum2 = 0 + $4;
diffnum ++;
if (linenum1 > 1) {
printf " <tr><td class=\"lineno\"></td><td class=\"left\"></td><td> </td><td class=\"right\"></td><td class=\"lineno\"></td></tr>\n";
page1 = getpage(1,linenum1);
page2 = getpage(2,linenum2);
if (page1 == "?") {
posinfo1 = sprintf("<a name=\"part-l%s\" /><small>skipping to change at</small><em> line %s</em>", diffnum, getpageline(1, linenum1, page1));
} else {
posinfo1 = sprintf("<a name=\"part-l%s\" /><small>skipping to change at</small><em> page %s, line %s</em>", diffnum, page1, getpageline(1, linenum1, page1));
}
if (page2 == "?") {
posinfo2 = sprintf("<a name=\"part-r%s\" /><small>skipping to change at</small><em> line %s</em>", diffnum, getpageline(2, linenum2, page2));
} else {
posinfo2 = sprintf("<a name=\"part-r%s\" /><small>skipping to change at</small><em> page %s, line %s</em>", diffnum, page2, getpageline(2, linenum2, page2));
}
printf " <tr bgcolor=\"gray\" ><td></td><th>%s</th><th> </th><th>%s</th><td></td></tr>\n", posinfo1, posinfo2;
}
}
/^---/ { next; }
/^[+][+][+]/ { next; }
/^[ ]/ {
line = substr($0, 2);
line = maybebreakline(line);
flush();
linenum1++;
linenum2++;
printf " <tr><td class=\"lineno\" valign=\"top\">%s</td><td class=\"left\">%s</td><td> </td>", numdisplay(1, linenum1), line;
printf "<td class=\"right\">%s</td><td class=\"lineno\" valign=\"top\">%s</td></tr>\n", line, numdisplay(2, linenum2);
diffcount1 += difflines1
difflines1 = 0
diffcount2 += difflines2
difflines2 = 0
}
/^-/ {
line = substr($0, 2);
line = maybebreakline(line);
stack1[difflines1] = line;
difflines1++;
}
/^[+]/ {
line = substr($0, 2);
line = maybebreakline(line);
stack2[difflines2] = line;
difflines2++;
}
END {
flush();
printf("\n" \
" <tr><td></td><td class=\"left\"></td><td> </td><td class=\"right\"></td><td></td></tr>\n" \
" <tr bgcolor=\"gray\"><th colspan=\"5\" align=\"center\"><a name=\"end\"> %s. %s change blocks. </a></th></tr>\n" \
" <tr class=\"stats\"><td></td><th><i>%s lines changed or deleted</i></th><th><i> </i></th><th><i>%s lines changed or added</i></th><td></td></tr>\n" \
" <tr><td colspan=\"5\" align=\"center\" class=\"small\"><br/>This html diff was produced by rfcdiff %s. The latest version is available from <a href=\"http://www.tools.ietf.org/tools/rfcdiff/\" >http://tools.ietf.org/tools/rfcdiff/</a> </td></tr>\n" \
" </table>\n" \
" </body>\n" \
" </html>\n", diffnum?"End of changes":"No changes", difftag, diffcount1, diffcount2, ENVIRON["version"]);
}
' "$1"
}
# ----------------------------------------------------------------------
# Generate before/after text output from a context diff
# ----------------------------------------------------------------------
abdiff() {
$AWK '
BEGIN {
# Read pagecache1
maxpage[1] = 1
pageend[1,0] = 2;
while ( getline < ENVIRON["pagecache1"] > 0) {
pageend[1,$1] = $2;
if ($1+0 > maxpage[1]) maxpage[1] = $1+0;
}
# Read pagecache2
maxpage[2] = 1
pageend[2,0] = 2;
while ( getline < ENVIRON["pagecache2"] > 0) {
pageend[2,$1] = $2;
if ($1+0 > maxpage[2]) maxpage[2] = $1+0;
}
base1 = ENVIRON["base1"]
base2 = ENVIRON["base2"]
section = "INTRODUCTION";
para = 0;
}
/^\+\+/ {
next;
}
/^\-\-/ {
next;
}
/^ Appendix ./ {
section = $1 " " $2;
para = 0;
}
/^ ? ? ?[0-9]+(\.[0-9]+)*\.? / {
section = "Section " $1;
para = 0;
}
/^ ?$/ {
if (inpara) {
printf "\n%s, paragraph %s:\n", section, para;
print "OLD:\n"
print oldpara
print "NEW:\n"
print newpara
}
oldpara = "";
newpara = "";
para ++;
inpara = 0
}
/^ ./ {
oldpara = oldpara $0 "\n"
newpara = newpara $0 "\n"
}
/^\-/ {
sub(/^./, " ");
oldpara = oldpara $0 "\n"
inpara++;
}
/^\+/ {
sub(/^./, " ");
newpara = newpara $0 "\n"
inpara++;
}
END {
if (inpara) {
printf "\n%s, paragraph %s:\n", section, para;
print "OLD:\n"
print oldpara
print "NEW:\n"
print newpara
}
}
'
}
# ----------------------------------------------------------------------
# Utility to extract keyword info
# ----------------------------------------------------------------------
extract() {
$AWK -v keyword="$1" '
BEGIN {
# print "Keyword", keyword;
}
/^# [A-Z]/ {
# print "New key", $2;
if ($2 == keyword ":" ) { output=1; } else { output=0; }
# print "Output", output;
}
/^#\t/ {
# print "Content", output, $0;
if ( output ) {
sub(/^#/,"");
print;
}
}
{
next;
}
' "$2"
}
# ----------------------------------------------------------------------
# Utility to start a browser
# ----------------------------------------------------------------------
browse() {
if [ "$(uname)" = "Darwin" ]; then
open "$@"
else
browser=$(lookfor firefox phoenix MozillaFirebird mozilla opera Netscape netscape dillo)
if [ -z "$browser" ]; then
echo "Couldn't find any browser, can't display $*."
exit 1
fi
# make sure file name is absolute
if [ "${1#/}" = "$1" ]; then
# not absolute path, add pwd
arg="file://$PWD/$1"
else
arg="file://$1"
fi
# see if a browser is running, act accordingly
$browser -remote "ping()" >/dev/null 2>&1
if [ $? -eq 0 ]; then
# use running instance
$browser -raise -remote "openurl($arg, new-tab)"
else
# error exit: no running instance
echo "Starting web browser."
$browser "$arg" >/dev/null 2>&1 &
fi
fi
}
# ----------------------------------------------------------------------
# Utility for error exit
# ----------------------------------------------------------------------
die() {
echo $*;
exit 1;
}
# ----------------------------------------------------------------------
# Process options
# ----------------------------------------------------------------------
# Default values
opthtml=1; optdiff=0; optchbars=0; optwdiff=0; optshow=0; optnowdiff=0;
optkeep=0; optinfo=0; optwidth=0; optnums=0; optbody=0; optabdiff=0;
optstrip=1; opthwdiff=0; optlinks=0;
optoldcolour="red"; optnewcolour="green"; optlarger=""
optstdout=0;
while [ $# -gt 0 ]; do
case "$1" in
--html) opthtml=1; optdiff=0; optchbars=0; optwdiff=0; opthwdiff=0; optabdiff=0;;
--diff) opthtml=0; optdiff=1; optchbars=0; optwdiff=0; opthwdiff=0; optabdiff=0;;
--chbars) opthtml=0; optdiff=0; optchbars=1; optwdiff=0; opthwdiff=0; optabdiff=0;;
--wdiff) opthtml=0; optdiff=0; optchbars=0; optwdiff=1; opthwdiff=0; optabdiff=0;;
--hwdiff) opthtml=0; optdiff=0; optchbars=0; optwdiff=0; opthwdiff=1; optabdiff=0;;
--changes)opthtml=0; optdiff=0; optchbars=0; optwdiff=0; opthwdiff=0; optabdiff=1;;
--abdiff) opthtml=0; optdiff=0; optchbars=0; optwdiff=0; opthwdiff=0; optabdiff=1;;
--ab-diff)opthtml=0; optdiff=0; optchbars=0; optwdiff=0; opthwdiff=0; optabdiff=1;;
--rfc-editor-diff)opthtml=0; optdiff=0; optchbars=0; optwdiff=0; opthwdiff=0; optabdiff=1;;
--version)echo -e "$basename\t$version\t$progdate"; exit 0;;
--browse) optshow=1;;
--nowdiff)optnowdiff=1;;
--keep) optkeep=1;;
--info) optinfo=1; keyword=$2; shift;;
--help) optinfo=1; keyword="Usage";;
--width) optwidth=$2; shift;;
--oldcolor) optoldcolour=$2; shift;;
--oldcolour) optoldcolour=$2; shift;;
--newcolor) optnewcolour=$2; shift;;
--newcolour) optnewcolour=$2; shift;;
--larger) optlarger='size="+1"';;
--linenum)optnums=1;;
--body) optbody=1;;
--nostrip)optstrip=0; optbody=0;;
--stdout) optstdout=1;;
--links) optlinks=1;;
--no-space-changes) optnospacechange=1;;
--ignore-whitespace) optignorewhite=1;;
--wdiff-args) optwdiffargs=$2; shift;;
--) shift; break;;
-v) echo "$basename $version"; exit 0;;
-*) echo "Unrecognized option: $1";
exit 1;;
*) break;;
esac
shift
done
export optwidth
export optnums
export optlinks
# ----------------------------------------------------------------------
# Determine output file name. Maybe output usage and exit.
# ----------------------------------------------------------------------
#set -x
if [ $optinfo -gt 0 ]; then
extract $keyword $0
exit
fi
if [ $# -ge 2 ]; then
if [ "$1" = "$2" ]; then
echo "The files are the same file"
exit
fi
export base1=$(basename "$1")
export base2=$(basename "$2")
outbase=$(worddiff "$base2" "$base1" "%s%s-from-%s")
else
extract Usage $0
exit 1
fi
# ----------------------------------------------------------------------
# create working directory.
# ----------------------------------------------------------------------
mkdir $workdir || die "$0: Error: Failed to create temporary directory '$workdir'."
mkdir $workdir/1 || die "$0: Error: Failed to create temporary directory '$workdir/1'."
mkdir $workdir/2 || die "$0: Error: Failed to create temporary directory '$workdir/2'."
# ----------------------------------------------------------------------
# If any of the files is an http or ftp URL we download it, else copy it
# ----------------------------------------------------------------------
wgetbin=$(lookfor wget)
dowgetarg1=0
dowgetarg2=0
if [ -n "$wgetbin" ]; then
if [ "${1#http://}" != "$1" ]; then dowgetarg1=1; fi
if [ "${1#ftp://}" != "$1" ]; then dowgetarg1=1; fi
if [ "${2#http://}" != "$2" ]; then dowgetarg2=1; fi
if [ "${2#ftp://}" != "$2" ]; then dowgetarg2=1; fi
fi
if [ $dowgetarg1 -gt 0 ]; then
$wgetbin -nv "$1" -O $workdir/1/"$base1"
else
cp "$1" $workdir/1/"$base1"
fi
if [ $dowgetarg2 -gt 0 ]; then
$wgetbin -nv "$2" -O $workdir/2/"$base2"
else
cp "$2" $workdir/2/"$base2"
fi
# ----------------------------------------------------------------------
# Maybe strip headers/footers from both files
# ----------------------------------------------------------------------
if [ $optstrip -gt 0 ]; then
export which=1
strip $workdir/1/"$base1" > $workdir/1/"$base1".stripped
mv -f $workdir/1/"$base1".stripped $workdir/1/"$base1"
export which=2
strip $workdir/2/"$base2" > $workdir/2/"$base2".stripped
mv -f $workdir/2/"$base2".stripped $workdir/2/"$base2"
fi
# ----------------------------------------------------------------------
# Maybe do html quoting
# ----------------------------------------------------------------------
if [ $opthwdiff -gt 0 ]; then
sed -e 's/&/&/g' -e 's/</\</g' -e 's/>/\>/g' $workdir/1/"$base1" > $workdir/1/"$base1".quoted
mv -f $workdir/1/"$base1".quoted $workdir/1/"$base1"
sed -e 's/&/&/g' -e 's/</\</g' -e 's/>/\>/g' $workdir/2/"$base2" > $workdir/2/"$base2".quoted
mv -f $workdir/2/"$base2".quoted $workdir/2/"$base2"
fi
# ----------------------------------------------------------------------
# Maybe strip preamble (title, boilerplate and table of contents) and
# postamble (Intellectual Property Statement, Disclaimer etc)
# ----------------------------------------------------------------------
if [ $optbody -gt 0 ]; then
bodystrip $workdir/1/"$base1" > $workdir/1/"$base1".stripped
mv $workdir/1/"$base1".stripped $workdir/1/"$base1"
bodystrip $workdir/2/"$base2" > $workdir/2/"$base2".stripped
mv $workdir/2/"$base2".stripped $workdir/2/"$base2"
fi
# ----------------------------------------------------------------------
# Get output file name
# ----------------------------------------------------------------------
if [ "$3" ]; then
outfile="$3"
else
if [ $opthtml -gt 0 ]; then
outfile=./"$outbase".diff.html
fi
if [ $optchbars -gt 0 ]; then
outfile=./"$outbase".chbar
fi
if [ $optdiff -gt 0 ]; then
outfile=./"$outbase".diff
fi
if [ $optabdiff -gt 0 ]; then
outfile=./"$outbase".changes
fi
if [ $opthwdiff -gt 0 ]; then
outfile=./"$outbase".wdiff.html
fi
fi
if [ "$outfile" ]; then
tempout=./$(basename "$outfile")
fi
# ----------------------------------------------------------------------
# Check if we can use wdiff for block diffs
# ----------------------------------------------------------------------
if [ $optnowdiff -eq 0 ]; then
wdiffbin=$(lookfor wdiff)
if [ -n "$wdiffbin" ]; then
wdiffver=$($wdiffbin --version 2>/dev/null | egrep "(wdiff|GNU).+[0-9]\.[0-9]")
if [ -z "$wdiffver" ]; then
wdiffbin="";
echo -en "\n Found wdiff, but it reported no recognisable version."
fi
else
echo -en "\n Couldn't find wdiff."
fi
if [ -z "$wdiffbin" ]; then echo " Falling back to builtin diff colouring..."; fi
export wdiffbin
export wdiffver
#echo "Found wdiff at $wdiffbin"
fi
# ----------------------------------------------------------------------
# Get some misc. info
# ----------------------------------------------------------------------
uname=$(uname -a)
export uname
awkbin=$AWK
export awkbin
awkver=$( { $AWK --version 2>/dev/null || $AWK -V 2>/dev/null; } | head -n 1)
export awkver
diffbin=$(lookfor diff)
export diffbin
diffver=$(diff --version | head -n 1)
export diffver
# ----------------------------------------------------------------------
# Set up the JS code to page through chunks.
# ----------------------------------------------------------------------
jsinc=$(cat <<'ENDOFSCRIPT'
<script src="rfcdiff.js"></script>
ENDOFSCRIPT
)
export jsinc
# ----------------------------------------------------------------------
# Check that we don't have a broken awk
# ----------------------------------------------------------------------
if [ $opthtml -gt 0 -a "${uname%% *}" == "Darwin" -a "$awkver" == "awk version 20070501" ]; then
echo -e "\n Oops. Awk version 20070501 on OS X doesn't work with rfcdiff's html mode.\n To make rfcdiff work, you could install Gnu Awk (gawk), for instance using\n MacPorts, http://www.macports.org/."
exit 1
fi
# ----------------------------------------------------------------------
# Do diff
# ----------------------------------------------------------------------