source: general/prog/vala.xml@ a1492906

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

  <!ENTITY vala-download-http "&gnome-download-http;/vala/&vala-major-version;/vala-&vala-version;.tar.xz">
  <!ENTITY vala-download-ftp  " ">
  <!ENTITY vala-md5sum        "c8d3e343c93b1e4c1070d662da768de6">
  <!ENTITY vala-size          "3.8 MB">
  <!ENTITY vala-buildsize     "199 MB (add 18 MB for tests)">
  <!ENTITY vala-time          "0.5 SBU (add 1.3 SBU for tests; both using parallelism=4)">
]>

<sect1 id="vala" xreflabel="Vala-&vala-version;">
  <?dbhtml filename="vala.html"?>

  <title>Vala-&vala-version;</title>

  <indexterm zone="vala">
    <primary sortas="a-Vala">Vala</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to Vala</title>

    <para>
      <application>Vala</application> is a new programming language that
      aims to bring modern programming language features to
      <application>GNOME</application> developers without imposing any
      additional runtime requirements and without using a different ABI
      compared to applications and libraries written in C.
    </para>

    &lfs120_checked;

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Download (HTTP): <ulink url="&vala-download-http;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download (FTP): <ulink url="&vala-download-ftp;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download MD5 sum: &vala-md5sum;
        </para>
      </listitem>
      <listitem>
        <para>
          Download size: &vala-size;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated disk space required: &vala-buildsize;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated build time: &vala-time;
        </para>
      </listitem>
    </itemizedlist>

    <bridgehead renderas="sect3">Vala Dependencies</bridgehead>

    <bridgehead renderas="sect4">Required</bridgehead>
    <para role="required">
      <xref linkend="glib2"/>
    </para>

    <bridgehead renderas="sect4">Recommended</bridgehead>
    <para role="recommended">
      <xref linkend="graphviz"/> (Required for valadoc)
    </para>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <xref linkend="dbus"/> (Required for the tests),
      <xref linkend="libxslt"/> (Required for generating the documentation),
      <ulink url="https://ftpmirror.gnu.org/gnu/help2man/">help2man</ulink>,
      <ulink url="https://github.com/relaxng/jing-trang">jing</ulink>, and
      <ulink url="https://weasyprint.org/">weasyprint</ulink>
    </para>

  </sect2>

  <sect2 role="installation">
    <title>Installation of Vala</title>

    <!-- https://gitlab.gnome.org/GNOME/vala/-/issues/1485 -->
    <para>
      At first, fix an issue causing <command>vapigen</command> to crash
      building some packages (for example NetworkManager):
    </para>

<screen><userinput>sed -e "/next_pos =/s/$/ \
        char buf[16]; \
        Memory.copy (buf, next_pos, \
        (end - next_pos >= buf.length ? buf.length - 1 : end - next_pos));/" \
    -e 's/(string) next_pos/(string) buf/' \
    -i vala/valamarkupreader.vala</userinput></screen>

    <para>
      Install <application>Vala</application> by running the following
      commands:
    </para>

<screen><userinput>./configure --prefix=/usr &amp;&amp;
make bootstrap</userinput></screen>

    <para>
      To test the results, issue: <command>make check</command>.
    </para>

    <para>
      Now, as the <systemitem class="username">root</systemitem> user:
    </para>

<screen role="root"><userinput>make install</userinput></screen>

  </sect2>

  <sect2 role="commands">
    <title>Command Explanations</title>

    <para>
      <parameter>bootstrap</parameter>: This <command>make</command>
      target forces the building system to build the package twice and use
      the <command>vala</command> executable produced in the first build
      to regenerate the <filename class="extension">.c</filename> files
      from the <filename class="extension">.vala</filename> files if needed.
      Since the <command>vala</command> executable is not installed yet,
      this is necessary for really fixing the crash because the fix has
      modified a <filename class="extension">.vala</filename> file.
    </para>

    <para>
      <option>--disable-valadoc</option>: This option is
      required if <xref linkend="graphviz"/> is not installed.
    </para>
  </sect2>

  <sect2 role="content">
    <title>Contents</title>

    <segmentedlist>
      <segtitle>Installed Programs</segtitle>
      <segtitle>Installed Library</segtitle>
      <segtitle>Installed Directories</segtitle>

      <seglistitem>
        <seg>
          vala,
          vala-&vala-major-version;,
          valac,
          valadoc,
          vala-gen-introspect, and
          vapigen (symlinks);

          valac-&vala-major-version;,
          valadoc-&vala-major-version;,
          vala-gen-introspect-&vala-major-version;, and
          vapigen-&vala-major-version;
        </seg>
        <seg>
          libvala-&vala-major-version;.so and
          libvaladoc-&vala-major-version;.so
        </seg>
        <seg>
          /usr/include/vala-&vala-major-version;,
          /usr/include/valadoc-&vala-major-version;,
          /usr/lib/vala-&vala-major-version;,
          /usr/lib/valadoc-&vala-major-version;,
          /usr/share/vala,
          /usr/share/vala-&vala-major-version;,
          /usr/share/valadoc-&vala-major-version;, and
          /usr/share/devhelp/books/vala-&vala-major-version;
        </seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="valac">
        <term><command>valac</command></term>
        <listitem>
          <para>
            is a compiler that translates <application>Vala</application>
            source code into C source and header files
          </para>
          <indexterm zone="vala valac">
            <primary sortas="b-valac">valac</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="valadoc">
        <term><command>valadoc</command></term>
        <listitem>
          <para>
            is a documentation generator for generating API documentation
            from <application>Vala</application> source code based on libvala
          </para>
          <indexterm zone="vala valadoc">
            <primary sortas="b-valadoc">valadoc</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="vala-gen-introspect">
        <term><command>vala-gen-introspect</command></term>
        <listitem>
          <para>
            generates a GI file for GObject and
            <application>GLib</application> based packages
          </para>
          <indexterm zone="vala vala-gen-introspect">
            <primary sortas="b-vala-gen-introspect">vala-gen-introspect</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="vapigen">
        <term><command>vapigen</command></term>
        <listitem>
          <para>
            is an utility which generates <application>Vala</application> API
            (VAPI) files from GI files
          </para>
          <indexterm zone="vala vapigen">
            <primary sortas="b-vapigen">vapigen</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libvala">
        <term><filename class="libraryfile">libvala-&vala-major-version;.so</filename></term>
        <listitem>
          <para>
            contains the <application>Vala</application> API functions
          </para>
          <indexterm zone="vala libvala">
            <primary sortas="c-libvala">libvala-&vala-major-version;.so</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>