relpipe-data/release-v0.10.xml
author František Kučera <franta-hg@frantovo.cz>
Tue, 27 Aug 2019 13:50:37 +0200
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examples: XHTML table processing in SQL
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<stránka
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	xmlns="https://trac.frantovo.cz/xml-web-generator/wiki/xmlns/strana"
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	xmlns:m="https://trac.frantovo.cz/xml-web-generator/wiki/xmlns/makro">
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	<nadpis>Release v0.10</nadpis>
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	<perex>third public release of Relational pipes</perex>
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	<m:release>v0.10</m:release>
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	<text xmlns="http://www.w3.org/1999/xhtml">
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		<p>
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			We are pleased to introduce you the new version of <m:name/>.
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			This release brings Guile support and some minor changes:
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		</p>
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		<ul>
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			<li>
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				<strong>Guile transformations</strong>:
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				the new tool <code>relpipe-tr-guile</code> integrates GNU Guile
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				and allows writing filters (WHERE-like conditions) and transformations (SELECT-like projections)
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				in the Scheme language.
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				Filter could look like e.g. <code>--where '(or (= $size 666) (= $size 1984) )'</code>.
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				See the <m:a href="examples">examples</m:a> page for details.
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			</li>
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			<li>
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				<strong>ODS output</strong>:
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				Integer attributes are now generated with proper data type,
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				so e.g. in LibreOffice they are recognized as numbers instead of strings.
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			</li>
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			<li>
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				<strong>CSV output</strong>:
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				Now generates CRLF line-ends (as defined in RFC 4180).
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			</li>
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			<li>
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				<strong>Filesystem input</strong>:
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				Now allows custom relation names (option: <code>--relation</code>).
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				And default xattr namespace is now <code>user</code> so the attribute names do not have to be prefixed with <code>user.</code>.
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			</li>
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		</ul>
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		<!--
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		<p>
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			See the <m:a href="examples">examples</m:a> page for details.
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		</p>
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		-->
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		<h3>Data types</h3>
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		<ul>
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			<li m:since="v0.8">boolean</li>
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			<li m:since="v0.8">variable unsigned integer (prototype)</li>
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			<li m:since="v0.8">string in UTF-8</li>
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		</ul>
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		<h3>Inputs</h3>
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		<ul>
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			<li m:since="v0.9">XML</li>
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			<li m:since="v0.9">CSV</li>
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			<li m:since="v0.9">file system</li>
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			<li m:since="v0.8">CLI</li>
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			<li m:since="v0.8">fstab</li>
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		</ul>
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		<h3>Transformations</h3>
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		<ul>
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			<li m:since="v0.10">guile: filtering and transformations defined in the Scheme language using GNU Guile</li>
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			<li m:since="v0.8">grep: regular expression filter, removes unwanted records from the relation</li>
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			<li m:since="v0.8">cut: regular expression attribute cutter (removes or duplicates attributes and can also DROP whole relation)</li>
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			<li m:since="v0.8">sed: regular expression replacer</li>
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			<li m:since="v0.8">validator: just a pass-through filter that crashes on invalid data</li>
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			<li m:since="v0.8">python: highly experimental</li>
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		</ul>
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		<h3>Outputs</h3>
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		<ul>
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			<li m:since="v0.9">CSV</li>
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			<li m:since="v0.8">tabular</li>
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			<li m:since="v0.8">XML</li>
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			<li m:since="v0.8">nullbyte</li>
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			<li m:since="v0.8">GUI in Qt</li>
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			<li m:since="v0.8">ODS (LibreOffice)</li>
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		</ul>
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		<p>
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			Instalation was tested on Debian GNU/Linux 9.6.
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			The process should be similar on other distributions.
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		</p>
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		<m:pre src="examples/release-v0.10.sh" jazyk="bash" odkaz="ano"/>
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		<p>
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			<m:name/> are modular thus you can download and install only parts you need (the libraries are needed always).
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			Tools <code>out-gui.qt</code> and <code>tr-python</code> require additional libraries and are not built by default.
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		</p>
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		<p>
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			The module <code>relpipe-in-filesystem</code> uses C++ filesystem API which is supported since GCC 8.
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			This module can be compiled and seems usable even with GCC 6, but requires some patching (switch to the experimental API):
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		</p>
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		<m:pre jazyk="bash"><![CDATA[sed 's@#include <filesystem>@#include <experimental/filesystem>@g' -i "$RELPIPE_SRC"/relpipe-in-filesystem.cpp/src/FileAttributeFinder.h "$RELPIPE_SRC"/relpipe-in-filesystem.cpp/src/XattrAttributeFinder.h "$RELPIPE_SRC"/relpipe-in-filesystem.cpp/src/FilesystemCommand.h "$RELPIPE_SRC"/relpipe-in-filesystem.cpp/src/AttributeFinder.h
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sed 's@std::filesystem@std::experimental::filesystem@g' -i "$RELPIPE_SRC"/relpipe-in-filesystem.cpp/src/FileAttributeFinder.h "$RELPIPE_SRC"/relpipe-in-filesystem.cpp/src/XattrAttributeFinder.h "$RELPIPE_SRC"/relpipe-in-filesystem.cpp/src/FilesystemCommand.h "$RELPIPE_SRC"/relpipe-in-filesystem.cpp/src/AttributeFinder.h
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sed 's/.*PROPERTY CXX_STANDARD.*/#\0/g' -i "$RELPIPE_SRC"/relpipe-in-filesystem.cpp/src/CMakeLists.txt]]></m:pre>
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		<p>
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			The module <code>relpipe-tr-guile</code> uses GNU Guile 2.2 but can also work with 2.0.
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			In such case, it requires this patch:
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		</p>
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		<m:pre jazyk="bash"><![CDATA[sed 's/guile-2\.2/guile-2.0/g' -i "$RELPIPE_SRC"/relpipe-tr-guile.cpp/src/CMakeLists.txt]]></m:pre>
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25dec6931f18 Lepší odsazení, tabulátory.
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	</text>
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a05c6f3cbc3e základ, první verze
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</stránka>