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* Added a utility that can be used to produce nice HTML pages from Nix

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build logs.  The program `log2xml' converts a Nix build log (read
  from standard input) into XML file that can then be converted to
  XHTML by the `log2html.xsl' stylesheet.  The CSS stylesheet
  `logfile.css' is necessary to make it look good.

  This is primarily useful if the log file has a *tree structure*,
  i.e., that sub-tasks such as the various phases of a build (unpack,
  configure, make, etc.) or recursive invocations of Make are
  represented as such.  While a log file is in principle an
  unstructured plain text file, builders can communicate this tree
  structure to `log2xml' by using escape sequences:

  - "\e[p" starts a new nesting level; the first line following the
    escape code is the header;

  - "\e[q" ends the current nesting level.

  The generic builder in nixpkgs (not yet committed) uses this.  It
  shouldn't be to hard to patch GNU Make to speak this protocol.

  Further improvements to the generated HTML pages are to allow
  collapsing/expanding of subtrees, and to abbreviate store paths (but
  to show the full path by hovering the mouse over it).
This commit is contained in:
Eelco Dolstra 2004-03-15 21:51:14 +00:00
parent beda10f5a2
commit 9d2669d218
6 changed files with 240 additions and 1 deletions
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1
configure.ac
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@ -118,6 +118,7 @@ AC_CONFIG_FILES([Makefile
src/libexpr/Makefile
src/nix-instantiate/Makefile
src/nix-env/Makefile
src/log2xml/Makefile
scripts/Makefile
corepkgs/Makefile
corepkgs/fetchurl/Makefile

2
src/Makefile.am
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@ -1,2 +1,2 @@
SUBDIRS = bin2c boost libutil libstore libmain nix-store nix-hash \
libexpr nix-instantiate nix-env
libexpr nix-instantiate nix-env log2xml

9
src/log2xml/Makefile.am Normal file
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@ -0,0 +1,9 @@
bin_PROGRAMS = log2xml
log2xml_SOURCES = log2xml.cc
%.xml: %.log log2xml
./log2xml < $< > $@
%.html: %.xml log2html.xsl
xsltproc log2html.xsl $< > $@

61
src/log2xml/log2html.xsl Normal file
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@ -0,0 +1,61 @@
<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="logfile">
<html>
<head>
<link rel="stylesheet" href="logfile.css" type="text/css" />
<title>Log File</title>
</head>
<body>
<xsl:apply-templates/>
</body>
</html>
</xsl:template>
<xsl:template match="nest">
<div class='nesting'>
<div class='head'>
<code>
<xsl:value-of select="head"/>
</code>
</div>
<blockquote class='body'>
<xsl:for-each select='line|nest'>
<xsl:if test="position() != last()">
<table class='x'>
<tr class='x'>
<td class='dummy'>
<div class='dummy' />
</td>
<td>
<xsl:apply-templates select='.'/>
</td>
</tr>
</table>
</xsl:if>
<xsl:if test="position() = last()">
<table class='y'>
<tr class='y'>
<td class='dummy'>
<div class='dummy' />
</td>
<td>
<xsl:apply-templates select='.'/>
</td>
</tr>
</table>
</xsl:if>
</xsl:for-each>
</blockquote>
</div>
</xsl:template>
<xsl:template match="line">
<code class='line'>
<xsl:value-of select="."/>
</code>
</xsl:template>
</xsl:stylesheet>

102
src/log2xml/log2xml.cc Normal file
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@ -0,0 +1,102 @@
#include <iostream>
#include <cstdio>
#include <string>
using namespace std;
struct Decoder
{
enum { stTop, stEscape, stCSI } state;
string line;
bool inHeader;
int level;
Decoder()
{
state = stTop;
line = "";
inHeader = false;
level = 0;
}
void pushChar(char c);
void finishLine();
};
void Decoder::pushChar(char c)
{
switch (state) {
case stTop:
if (c == '\e') {
state = stEscape;
} else if (c == '\n') {
finishLine();
} else if (c == '<')
line += "&lt;";
else if (c == '&')
line += "&amp;";
else
line += c;
break;
case stEscape:
if (c == '[')
state = stCSI;
else
state = stTop; /* !!! wrong */
break;
case stCSI:
if (c >= 0x40 && c != 0x7e) {
state = stTop;
switch (c) {
case 'p':
if (line.size()) finishLine();
level++;
inHeader = true;
cout << "<nest>" << endl;
break;
case 'q':
if (line.size()) finishLine();
if (level > 0) {
level--;
cout << "</nest>" << endl;
} else
cerr << "not enough nesting levels" << endl;
break;
}
}
break;
}
}
void Decoder::finishLine()
{
string tag = inHeader ? "head" : "line";
cout << "<" << tag << ">";
cout << line;
cout << "</" << tag << ">" << endl;
line = "";
inHeader = false;
}
int main(int argc, char * * argv)
{
Decoder dec;
int c;
cout << "<logfile>" << endl;
while ((c = getchar()) != EOF) {
dec.pushChar(c);
}
cout << "</logfile>" << endl;
}

66
src/log2xml/logfile.css Normal file
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@ -0,0 +1,66 @@
body
{
font-family: sans-serif;
background: white;
}
blockquote.body
{
padding: 6px 0px;
margin: 0px 1px;
}
table.x, tr.x
{
border-collapse: separate;
border-spacing: 0pt;
margin: 0em 0em 0em 0em;
padding: 0em 0em 0em 0em;
}
tr.x > td.dummy
{
vertical-align: top;
margin: 0em 0em 0em 0em;
padding: 0.5em 0em 0em 0em;
border-left: 3px solid #6185a0;
}
tr.x > td.dummy > div.dummy
{
width: 1.5em;
height: 3px;
margin: 0em 0em 0em 0em;
border-top: 3px solid #6185a0;
}
table.y, tr.y
{
border-collapse: separate;
border-spacing: 0pt;
margin: 0em 0em 0em 0em;
padding: 0em 0em 0em 0em;
}
tr.y > td.dummy
{
vertical-align: top;
margin: 0em 0em 0em 0em;
padding: 0em 0em 0em 0em;
}
tr.y > td.dummy > div.dummy
{
width: 1.5em;
height: 6px;
margin: 0em 0em 0em 0em;
border-left: 3px solid #6185a0;
border-bottom: 3px solid #6185a0;
}