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<!DOCTYPE html>
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</head>
<body class="article">
<div id="header">
<h1>PGXNtool</h1>
<div class="details">
<span id="author" class="author">Easier PGXN development</span><br>
</div>
<div id="toc" class="toc">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel1">
<li><a href="#_install">1. Install</a></li>
<li><a href="#_usage">2. Usage</a></li>
<li><a href="#_make_targets">3. make targets</a>
<ul class="sectlevel2">
<li><a href="#_html">3.1. html</a></li>
<li><a href="#_test">3.2. test</a></li>
<li><a href="#_testdeps">3.3. testdeps</a></li>
<li><a href="#_results">3.4. results</a></li>
<li><a href="#_tag">3.5. tag</a></li>
<li><a href="#_dist">3.6. dist</a></li>
<li><a href="#_pgxntool_sync">3.7. pgxntool-sync</a></li>
</ul>
</li>
<li><a href="#_document_handling">4. Document Handling</a>
<ul class="sectlevel2">
<li><a href="#_document_variables">4.1. Document Variables</a></li>
<li><a href="#_document_rules">4.2. Document Rules</a></li>
<li><a href="#_the_docs_variable">4.3. The DOCS variable</a></li>
</ul>
</li>
<li><a href="#_copyright">5. Copyright</a></li>
</ul>
</div>
</div>
<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>PGXNtool is meant to make developing new Postgres extensions for <a href="http://pgxn.org">PGXN</a> easier.</p>
</div>
<div class="paragraph">
<p>Currently, it consists a base Makefile that you can include instead of writing your own, a template META.json, and some test framework. More features will be added over time.</p>
</div>
<div class="paragraph">
<p>If you find any bugs or have ideas for improvements, please <a href="https://github.com/decibel/pgxntool/issues"><strong>open an issue</strong></a>.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_install"><a class="anchor" href="#_install"></a>1. Install</h2>
<div class="sectionbody">
<div class="paragraph">
<p>This assumes that you’ve already initialized your extension in git.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<div class="title">Note</div>
</td>
<td class="content">
The <code>--squash</code> is important! Otherwise you’ll clutter your repo with a bunch of commits you probably don’t want.
</td>
</tr>
</table>
</div>
<div class="listingblock">
<div class="content">
<pre>git subtree add -P pgxntool --squash git@github.com:decibel/pgxntool.git release
pgxntool/setup.sh</pre>
</div>
</div>
<div class="paragraph">
<p>TODO: Create a nice script that will init a new project for you.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_usage"><a class="anchor" href="#_usage"></a>2. Usage</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Typically, you can just create a simple Makefile that does nothing but include base.mk:</p>
</div>
<div class="listingblock">
<div class="content">
<pre>include pgxntool/base.mk</pre>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_make_targets"><a class="anchor" href="#_make_targets"></a>3. make targets</h2>
<div class="sectionbody">
<div class="paragraph">
<p>These are the make targets that are provided by base.mk</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<div class="title">Note</div>
</td>
<td class="content">
all the targets normally provided by Postgres <a href="http://www.postgresql.org/docs/current/static/extend-pgxs.html">PGXS</a> still work.
</td>
</tr>
</table>
</div>
<div class="sect2">
<h3 id="_html"><a class="anchor" href="#_html"></a>3.1. html</h3>
<div class="paragraph">
<p>This will build any .html files that can be created. See <a href="#_Document_Handling">[_Document_Handling]</a>.</p>
</div>
</div>
<div class="sect2">
<h3 id="_test"><a class="anchor" href="#_test"></a>3.2. test</h3>
<div class="paragraph">
<p>Runs unit tests via the PGXS <code>installcheck</code> target. Unlike a simple <code>make installcheck</code> though, the <code>test</code> rule has the following prerequisites: clean testdeps install installcheck. All of those are PGXS rules, except for <code>testdeps</code>.</p>
</div>
</div>
<div class="sect2">
<h3 id="_testdeps"><a class="anchor" href="#_testdeps"></a>3.3. testdeps</h3>
<div class="paragraph">
<p>This rule allows you to ensure certain actions have taken place before running tests. By default it has a single prerequisite, <code>pgtap</code>, which will attempt to install <a href="http://pgtap.org">pgtap</a> from PGXN. This depneds on having the pgxn client installed.</p>
</div>
<div class="paragraph">
<p>You can add any other dependencies you want by simply adding another <code>testdeps</code> rule. For example:</p>
</div>
<div class="paragraph">
<p>testdeps example from <a href="https://github.com/decibel/test_factory/blob/493020d29ba976c38a98e7f1c68bfd89900f0e22/Makefile#L4">test_factory</a></p>
</div>
<div class="listingblock">
<div class="content">
<pre>testdeps: check_control
.PHONY: check_control
check_control:
grep -q "requires = 'pgtap, test_factory'" test_factory_pgtap.control</pre>
</div>
</div>
<div class="paragraph">
<p>If you want to over-ride the default dependency on <code>pgtap</code> you should be able to do that with a makefile override. If you need help with that, please <a href="https://github.com/decibel/pgxntool/issues">open an issue</a>.</p>
</div>
<div class="admonitionblock warning">
<table>
<tr>
<td class="icon">
<div class="title">Warning</div>
</td>
<td class="content">
It will probably cause problems if you try to create a <code>testdeps</code> rule that has a recipe. Instead of doing that, put the recipe in a separate rule and make that rule a prerequisite of <code>testdeps</code> as show in the example.
</td>
</tr>
</table>
</div>
</div>
<div class="sect2">
<h3 id="_results"><a class="anchor" href="#_results"></a>3.4. results</h3>
<div class="paragraph">
<p>Because <code>make test</code> ultimately runs <code>installcheck</code>, it’s using the Postgres test suite. Unfortunately, that suite is based on running <code>diff</code> between a raw output file and expected results. I <strong>STRONGLY</strong> recommend you use <a href="http://pgtap.org">pgTap</a> instead! The extra effort of learning pgTap will quickly pay for itself. <a href="https://github.com/decibel/trunklet-format/blob/master/test/sql/base.sql">This example</a> might help get you started.</p>
</div>
<div class="paragraph">
<p>No matter what method you use, once you know that all your tests are passing correctly, you need to create or update the test output expected files. <code>make results</code> does that for you.</p>
</div>
</div>
<div class="sect2">
<h3 id="_tag"><a class="anchor" href="#_tag"></a>3.5. tag</h3>
<div class="paragraph">
<p><code>make tag</code> will create a git branch for the current version of your extension, as determined by the META.json file. The reason to do this is so you can always refer to the exact code that went into a released version.</p>
</div>
<div class="paragraph">
<p>If there’s already a tag for the current version that probably means you forgot to update META.json, so you’ll get an error. If you’re certain you want to over-write the tag, you can do <code>make forcetag</code>, which removes the existing tag (via <code>make rmtag</code>) and creates a new one.</p>
</div>
<div class="admonitionblock warning">
<table>
<tr>
<td class="icon">
<div class="title">Warning</div>
</td>
<td class="content">
You will be very unhappy if you forget to update the .control file for your extension! There is an <a href="https://github.com/decibel/pgxntool/issues/1">open issue</a> to improve this.
</td>
</tr>
</table>
</div>
</div>
<div class="sect2">
<h3 id="_dist"><a class="anchor" href="#_dist"></a>3.6. dist</h3>
<div class="paragraph">
<p><code>make dist</code> will create a .zip file for your current version that you can upload to PGXN. The file is named after the PGXN name and version (the top-level "name" and "version" attributes in META.json). The .zip file is placed in the <strong>parent</strong> directory so as not to clutter up your git repo.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<div class="title">Note</div>
</td>
<td class="content">
Part of the <code>clean</code> recipe is cleaning up these .zip files. If you accidentally clean before uploading, just run <code>make dist-only</code>.
</td>
</tr>
</table>
</div>
</div>
<div class="sect2">
<h3 id="_pgxntool_sync"><a class="anchor" href="#_pgxntool_sync"></a>3.7. pgxntool-sync</h3>
<div class="paragraph">
<p>This rule will pull down the latest released version of PGXNtool via <code>git subtree pull</code>.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<div class="title">Note</div>
</td>
<td class="content">
Your repository must be clean (no modified files) in order to run this. Running this command will produce a git commit of the merge.
</td>
</tr>
</table>
</div>
<div class="admonitionblock tip">
<table>
<tr>
<td class="icon">
<div class="title">Tip</div>
</td>
<td class="content">
There is also a <code>pgxntool-sync-%</code> rule if you need to do more advanced things.
</td>
</tr>
</table>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_document_handling"><a class="anchor" href="#_document_handling"></a>4. Document Handling</h2>
<div class="sectionbody">
<div class="paragraph">
<p>PGXNtool supports generation and installation of document files. There are several variables and rules that control this behavior.</p>
</div>
<div class="paragraph">
<p>It is recommended that you commit any generated documentation files (such as HTML generated from Asciidoc) into git.
That way users will have these files installed when they install your extension.
If any generated files are missing (or out-of-date) during installation, PGXNtool will build them if Asciidoc is present on the system.</p>
</div>
<div class="sect2">
<h3 id="_document_variables"><a class="anchor" href="#_document_variables"></a>4.1. Document Variables</h3>
<div class="dlist">
<dl>
<dt class="hdlist1">DOC_DIRS</dt>
<dd>
<p>Directories to look for documents in.
Defined as <code>+= doc</code>.</p>
</dd>
<dt class="hdlist1">DOCS</dt>
<dd>
<p>PGXS variable.
See <a href="#_the_docs_variable">The DOCS variable</a> below.</p>
</dd>
<dt class="hdlist1">DOCS_HTML</dt>
<dd>
<p>Document HTML files.
PGXNtool appends `$(ASCIIDOC_HTML) to this variable.</p>
</dd>
<dt class="hdlist1">ASCIIDOC</dt>
<dd>
<p>Location of <code>asciidoc</code> or equivalent executable.
If not set PGXNtool will search for first <code>asciidoctor</code>, then <code>asciidoc</code>.</p>
</dd>
<dt class="hdlist1">ASCIIDOC_EXTS</dt>
<dd>
<p>File extensions to consider as Asciidoc.
Defined as <code>+= adoc asciidoc</code>.</p>
</dd>
<dt class="hdlist1">ASCIIDOC_FILES</dt>
<dd>
<p>Asciidoc input files.
PGXNtool searches each <code>$(DOC_DIRS)</code> directory, looking for files with any <code>$(ASCIIDOC_EXTS)</code> extension.
Any files found are added to <code>ASCIIDOC_FILES</code> using <code>+=</code>.</p>
</dd>
<dt class="hdlist1">ASCIIDOC_FLAGS</dt>
<dd>
<p>Additional flags to pass to Asciidoc.</p>
</dd>
<dt class="hdlist1">ASCIIDOC_HTML</dt>
<dd>
<p>PGXNtool replaces each <code>$(ASCIIDOC_EXTS)</code> in <code>$(ASCIIDOC_FILES)</code> with <code>html</code>.
The result is appended to <code>ASCIIDOC_HTML</code> using <code>+=</code>.</p>
</dd>
</dl>
</div>
</div>
<div class="sect2">
<h3 id="_document_rules"><a class="anchor" href="#_document_rules"></a>4.2. Document Rules</h3>
<div class="paragraph">
<p>If Asciidoc is found (or <code>$(ASCIIDOC)</code> is set), the <code>html</code> rule will be added as a prerequisite to the <code>install</code> and <code>installchec</code> rules.
That will ensure that docs are generated for install and test, but only if Asciidoc is available.
The <code>dist</code> rule will always depend on <code>html</code> though, to ensure html files are up-to-date before creating a distribution.</p>
</div>
<div class="paragraph">
<p>The <code>html</code> rule simply depends on `$(ASCIIDOC_HTML).
This rule is always present.</p>
</div>
<div class="paragraph">
<p>For each Asciidoc extension in <code>$(ASCIIDOC_EXTS)</code> a rule is generated to build a .html file from that extension using <code>$(ASCIIDOC)</code>.
These rules are generated from <code>ASCIIDOC_template</code>:</p>
</div>
<div class="listingblock">
<div class="title">ASCIIDOC_template</div>
<div class="content">
<pre class="highlight"><code class="language-Makefile" data-lang="Makefile">define ASCIIDOC_template
%.html: %.$(1) <b class="conum">(1)</b>
ifndef ASCIIDOC
$$(warning Could not find "asciidoc" or "asciidoctor". Add one of them to your PATH,)
$$(warning or set ASCIIDOC to the correct location.)
$$(error Could not build %$$@)
endif # ifndef ASCIIDOC
$$(ASCIIDOC) $$(ASCIIDOC_FLAGS) $$<
endef # define ASCIIDOC_template</code></pre>
</div>
</div>
<div class="colist arabic">
<ol>
<li>
<p><code>$(1)</code> is replaced by the extension.</p>
</li>
</ol>
</div>
<div class="paragraph">
<p>These rules will <strong>always</strong> exist, even if <code>$(ASCIIDOC)</code> isn’t set (ie: if Asciidoc wasn’t found on the system).
These rules will throw an error if they are run if <code>$(ASCIIDOC)</code> isn’t defined.
On a normal user system that should never happen, because the <code>html</code> rule won’t be included in <code>install</code> or <code>installcheck</code>.</p>
</div>
</div>
<div class="sect2">
<h3 id="_the_docs_variable"><a class="anchor" href="#_the_docs_variable"></a>4.3. The DOCS variable</h3>
<div class="paragraph">
<p>This variable has special meaning to PGXS.
See the Postgres documentation for full details.</p>
</div>
<div class="paragraph">
<p>If DOCS is defined when PGXS is included then rules will be added to install everything defined by $(DOCS) in <code>PREFIX/share/doc/extension</code>.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<div class="title">Note</div>
</td>
<td class="content">
If DOCS is defined but empty some of the PGXS targets will error out.
Because of this, <code>base.mk</code> will forcibly define it to be NULL if it’s empty.
</td>
</tr>
</table>
</div>
<div class="paragraph">
<p>PGXNtool appends <strong>all</strong> files found in all <code>$(DOC_DIRS)</code> to <code>DOCS</code>.</p>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_copyright"><a class="anchor" href="#_copyright"></a>5. Copyright</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Copyright (c) 2015 Jim Nasby <<a href="mailto:Jim.Nasby@BlueTreble.com">Jim.Nasby@BlueTreble.com</a>></p>
</div>
<div class="paragraph">
<p>PGXNtool is released under a <a href="https://github.com/decibel/pgxntool/blob/master/LICENCE">BSD license</a>. Note that it includes <a href="https://github.com/dominictarr/JSON.sh">JSON.sh</a>, which is released under a <a href="https://github.com/decibel/pgxntool/blob/master/JSON.sh.LICENCE">MIT license</a>.</p>
</div>
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<div id="footer-text">
Last updated 2016-11-19 15:40:59 CST
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