source: general/prog/mercurial.xml@ a887a08

<?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 mercurial-download-http "https://www.mercurial-scm.org/release/mercurial-&mercurial-version;.tar.gz">
  <!ENTITY mercurial-download-ftp  " ">
  <!ENTITY mercurial-md5sum        "4fb37e70718f5c026a3a9298e7bb8170">
  <!ENTITY mercurial-size          "7.8 MB">
  <!ENTITY mercurial-buildsize     "80 MB (with docs, add 2.3 GB for tests)">
  <!ENTITY mercurial-time          "0.3 SBU (with docs; add 14 SBU for tests; both using parallelism=4)">
]>

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


  <title>Mercurial-&mercurial-version;</title>

  <indexterm zone="mercurial">
    <primary sortas="a-mercurial">mercurial</primary>
  </indexterm>

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

    <para>
      <application>Mercurial</application> is a distributed source control
      management tool similar to <application>Git</application> and
      <application>Bazaar</application>. <application>Mercurial</application>
      is written in <application>Python</application> and is used by projects
      such as Mozilla for Firefox and Thunderbird.
    </para>

    &lfs113_checked;

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

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

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
    <xref linkend="docutils"/>
      (required to build the documentation),
    <xref linkend="git"/>,
    <xref linkend="gpgme"/> (with Python bindings),
    <xref role="runtime" linkend="openssh"/>
      (runtime, to access ssh://... repositories),
    <xref linkend="pygments"/>,
    <xref linkend="rust"/> (see <filename>rust/README.rst</filename> and <filename>rust/rhg/README.md</filename>),
    <xref linkend="subversion"/> (with Python bindings),
    <ulink url="https://launchpad.net/bzr">Bazaar</ulink>,
    <ulink url="https://www.nongnu.org/cvs/">CVS</ulink>,
    <ulink url="https://pypi.python.org/pypi/pyflakes">pyflakes</ulink>,
    <ulink url="https://www.pyopenssl.org/en/stable/">pyOpenSSL</ulink>, and
    <ulink url="https://github.com/google/re2/">re2</ulink>

    </para>

    <para condition="html" role="usernotes">User Notes:
    <ulink url="&blfs-wiki;/mercurial"/></para>

  </sect2>

  <sect2 role="installation">
    <title>Installation of Mercurial</title>
    <!-- Rust port is now part of the standard tests -->

    <para>
      Build <application>Mercurial</application> by issuing the following
      command:
    </para>

<screen><userinput>make build</userinput></screen>

    <para>
      To build the documentation (requires <xref linkend="docutils"/>), issue:
    </para>

<screen remap="doc"><userinput>make doc</userinput></screen>

    <para>
      If you wish to run the tests, the rust tests must be removed as they are
      currently broken due to syntax errors. To do this, issue:
    </para>

<screen><userinput>sed -i '138,142d' Makefile</userinput></screen>

    <para>
      To run the test suite, issue:
    </para>
<screen remap="test"><userinput>TESTFLAGS="-j<replaceable>&lt;N&gt;</replaceable> --tmpdir tmp" make check</userinput></screen>
<!-- The blacklists have to be checked every release of Mercurial, do a listing
     of tests/blacklists, but do not include the README. 
     For 6.4.1 removing the -blacklist entries did not affect the test results
     although blacklists/fsmonitor and blacklists/linux-vfat still exist. -->

    <para>
      where <replaceable>&lt;N&gt;</replaceable> is an integer between one
      and the number of ( processor X threads ), inclusive. Several tests
      fail because some error messages have changed in Python or
      some deprecation warnings are printed that were not present when the
      test was designed.
      <!--
      # Ran 908 tests, 65 skipped, 4 failed.  real  10m37.422s -bdubbs  6 Sep 22.
      # Ran 881 tests,102 skipped, 23 failed.                  -plabs  17 Nov 22.
      # Ran 919 tests, 64 skipped, 23 failed. real  10m25.285s -bdubbs 10 Jan 23.
      # Ran 893 tests,101 skipped,  9 failed. real  29m03.014s -bdubbs  5 Mar 23.
      # Ran 938 tests, 64 skipped,  8 failed. real  32m13.014s -bdubbs 17 Apr 23.
      # Ran 935 tests, 69 skipped,  8 failed. real  26m15.875s -bdubbs 10 Jun 23.
      # Ran 940 tests, 64 skipped,  8 failed. real  omitted    -bdubbs 26 Jun 23.
      -->
      In order to
      investigate any apparently failing tests, you may use the
      <command>run-tests.py</command> script. To see the almost forty switches,
      some of them very useful, issue <command>tests/run-tests.py
      --help</command>.  Running the following commands, you will execute only
      the tests that failed before:
    </para>

<screen remap="test"><userinput>pushd tests  &amp;&amp;
  rm -rf tmp &amp;&amp;
  ./run-tests.py --tmpdir tmp test-gpg.t
popd</userinput></screen>

    <para>
      Normally, the previous failures will be reproducible. However, if
      you add the switch <option>--debug</option> before
      <option>--tmpdir</option>, and run the tests again, some failures may
      disappear, which is a problem with the test suite. If this happens,
      there will be no more of these failures even if you do not pass the
      --debug switch again.
    </para>

    <para>
      An interesting switch is <option>--time</option>, which will generate a
      table of all the executed tests and their respective start, end, user,
      system and real times once the tests are complete. Note that these
      switches may be used with <command>make check</command> by including
      them in the <envar>TESTFLAGS</envar> environment variable.
    </para>

    <para>
      Install <application>Mercurial</application> by running the following
      command (as <systemitem class="username">root</systemitem>):
    </para>

<screen role="root"><userinput>make PREFIX=/usr install-bin</userinput></screen>

    <para>
      If you built the documentation, install it by running the following
      command (as <systemitem class="username">root</systemitem>):
    </para>

<screen role="root"
        remap="doc"><userinput>make PREFIX=/usr install-doc</userinput></screen>

    <para>
      After installation, two very quick and simple tests should run
      correctly. The first one needs some configuration:
    </para>

<screen><userinput>cat &gt;&gt; ~/.hgrc &lt;&lt; "EOF"
<literal>[ui]
username = <replaceable>&lt;user_name&gt; &lt;user@mail&gt;</replaceable></literal>
EOF</userinput></screen>

    <para>
      where you must replace &lt;user_name&gt; and &lt;your@mail&gt; (mail
      is optional and can be omitted). With the user identity defined, run
      <command>hg debuginstall</command> and several lines will be displayed,
      the last one reading "no problems detected". Another quick and simple
      test is just <command>hg</command>, which should output basic commands
      that can be used with <command>hg</command>.
    </para>

  </sect2>

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

      <para>
        <command>2to3 -w doc/hgmanpage.py</command>: Since <application>
        Python 3</application> is used with docutils, one file needs to be
        converted in order to be compatible.
      </para>

   </sect2>
-->

  <sect2 role="configuration">
    <title>Configuring Mercurial</title>

    <sect3 id="mercurial-config">
      <title>Config Files</title>

      <para>
        <filename>/etc/mercurial/hgrc</filename> and
        <filename>~/.hgrc</filename>
      </para>

      <indexterm zone="mercurial mercurial-config">
        <primary sortas="e-etc-mercurial-hgrc">/etc/mercurial/hgrc</primary>
      </indexterm>

      <indexterm zone="mercurial mercurial-config">
        <primary sortas="e-AA.hgrc">~/.hgrc</primary>
      </indexterm>

      <para>
        The great majority of extensions are disabled by default. Run
        <command>hg help extensions</command> if you need to enable any, e.g.
        when investigating test failures. This will output a list of enabled
        and disabled extensions, as well as more information such as how to
        enable or disable extensions using configuration files.
      </para>

      <para>
        If you have installed <xref linkend="make-ca"/> and want
        <application>Mercurial</application> to use the certificates,
        as the <systemitem class="username">root</systemitem> user, issue:
      </para>

<screen role="root"><userinput>install -v -d -m755 /etc/mercurial &amp;&amp;
cat &gt; /etc/mercurial/hgrc &lt;&lt; "EOF"
<literal>[web]
cacerts = /etc/pki/tls/certs/ca-bundle.crt</literal>
EOF</userinput></screen>

    </sect3>

  </sect2>

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

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

      <seglistitem>
        <seg>
          hg
        </seg>
        <seg>
          several internal modules under
          /usr/lib/python&python3-majorver;/site-packages/mercurial
        </seg>
        <seg>
          /etc/mercurial,
          /usr/lib/python&python3-majorver;/site-packages/hgdemandimport,
          /usr/lib/python&python3-majorver;/site-packages/hgext,
          /usr/lib/python&python3-majorver;/site-packages/hgext3rd,
          /usr/lib/python&python3-majorver;/site-packages/mercurial, and
          /usr/lib/python&python3-majorver;/site-packages/mercurial-&mercurial-version;-py&python3-majorver;.egg-info
        </seg>
      </seglistitem>
    </segmentedlist>

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

      <varlistentry id="hg">
        <term><command>hg</command></term>
        <listitem>
          <para>
            is the mercurial version control system
          </para>
          <indexterm zone="mercurial hg">
            <primary sortas="b-hg">hg</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>