source: postlfs/shells/zsh.xml

<?xml version="1.0" encoding="UTF-8"?>
<!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 zsh-download-http "https://www.zsh.org/pub/zsh-&zsh-version;.tar.xz">
  <!ENTITY zsh-download-ftp  " ">
  <!ENTITY zsh-md5sum        "182e37ca3fe3fa6a44f69ad462c5c30e">
  <!ENTITY zsh-size          "3.2 MB">
  <!ENTITY zsh-buildsize     "48 MB (includes documentation and tests)">
  <!ENTITY zsh-time          "1.6 SBU (Using parallelism=4; includes documentation and tests)">
]>

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


  <title>zsh-&zsh-version;</title>

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

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

    <para>
      The <application>zsh</application> package contains a command
      interpreter (shell) usable as an interactive login shell and as
      a shell script command processor. Of the standard shells,
      <application>zsh</application> most closely resembles
      <application>ksh</application> but includes many enhancements.
    </para>

    &lfs121_checked;

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

    <note>
      <para>
        When there is a new <application>zsh</application> release, the old
        files shown above are moved to a new server directory:
        <ulink url="https://www.zsh.org/pub/old/"/>.
      </para>
    </note>

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

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <!-- <xref linkend="pcre2"/>, The next zsh release will support it -->
      <xref linkend="valgrind"/> and
      <ulink url='https://fbb-git.gitlab.io/yodl/'>yodl</ulink>
    </para>

  </sect2>

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

    <para>
      Adapt the documentation build system for texinfo-7.0 or later:
    </para>

<screen><userinput>sed -e 's/set_from_init_file/texinfo_&amp;/' \
    -i Doc/Makefile.in</userinput></screen>

    <para>
      The documentation files contain references to zsh configuration
      files in <filename class='directory'>/etc</filename>, but we'll
      use <filename class='directory'>/etc/zsh</filename> to hold these
      configuration files instead.  The building system will fix up those
      references if the <application>yodl</application> package is
      available, but it's out of the scope of BLFS.  So we need to fix up
      the references manually:
    </para>

<screen><userinput>sed 's|/etc/z|/etc/zsh/z|g' -i Doc/*.*</userinput></screen>

<!--    <note>
      <para>
        Using a script to build with "su -c script" may produce a funny
        configure error message: "no controlling tty". If this happens, add
        the switch -\-with-tcsetpgrp to configure.
      </para>
    </note>
-->
    <para>
      Install <application>zsh</application> by running the following
      commands:
    </para>

<screen><userinput>./configure --prefix=/usr            \
            --sysconfdir=/etc/zsh    \
            --enable-etcdir=/etc/zsh \
            --enable-cap             \
            --enable-gdbm                      &amp;&amp;
make                                           &amp;&amp;

makeinfo  Doc/zsh.texi --html      -o Doc/html &amp;&amp;
makeinfo  Doc/zsh.texi --plaintext -o zsh.txt  &amp;&amp;
makeinfo  Doc/zsh.texi --html --no-split --no-headers -o zsh.html</userinput></screen>

    <para>
      If you have <xref linkend="texlive"/>
      installed, you can build PDF format of the documentation by issuing
      the following command:
    </para>

<screen remap="doc"><userinput>texi2pdf  Doc/zsh.texi -o Doc/zsh.pdf</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                                                    &amp;&amp;
make infodir=/usr/share/info install.info                       &amp;&amp;
make htmldir=/usr/share/doc/zsh-&zsh-version;/html install.html           &amp;&amp;
install -v -m644 zsh.{html,txt} Etc/FAQ /usr/share/doc/zsh-&zsh-version;</userinput></screen>

    <para>
      If you built the PDF format of the documentation, install
      it by issuing the following command as the
      <systemitem class="username">root</systemitem> user:
    </para>

<screen role="root"
        remap="doc"><userinput>install -v -m644 Doc/zsh.pdf /usr/share/doc/zsh-&zsh-version;</userinput></screen>

  </sect2>

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

    <para>
      <parameter>--sysconfdir=/etc/zsh</parameter> and
      <parameter>--enable-etcdir=/etc/zsh</parameter>: These parameters are
      used so that all the <application>zsh</application> configuration files
      are consolidated into the <filename class='directory'>/etc/zsh</filename>
      directory. Omit these parameters if you wish to retain historical
      compatibility by having all the files located in the
      <filename class='directory'>/etc</filename> directory.
    </para>

    <para>
      <parameter>--enable-cap</parameter>: This option enables
      POSIX capabilities.
    </para>

    <para>
      <parameter>--enable-gdbm</parameter>: This option enables the
      use of the <application>GDBM</application> library.
    </para>
<!-- the next zsh release will support it
    <para>
      <option>- -enable-pcre</option>: This option allows zsh to use
      the <application>PCRE2</application> regular expression library in shell
      builtins.
    </para>
-->
  </sect2>

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

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

      <para>
        There are a whole host of configuration files for
        <application>zsh</application> including
        <filename>/etc/zsh/zshenv</filename>,
        <filename>/etc/zsh/zprofile</filename>,
        <filename>/etc/zsh/zshrc</filename>,
        <filename>/etc/zsh/zlogin</filename> and
        <filename>/etc/zsh/zlogout</filename>.
        You can find more information on these in the
        <ulink role='man' url='&man;zsh.1'>zsh(1)</ulink> and related
        manual pages.
      </para>

      <para>
        The first time zsh is executed, you will be prompted by messages asking
        several questions. The answers will be used to create a
        <filename>~/.zshrc</filename> file. If you wish to run these questions
        again, run <command>zsh
        /usr/share/zsh/&zsh-version;/functions/zsh-newuser-install -f</command>.
      </para>

      <para>
        There are several built-in advanced prompts. In the
        <command>zsh</command> shell, start advanced prompt support with
        <command>autoload -U promptinit</command>, then
        <command>promptinit</command>. Available prompt names are listed with
        <command>prompt -l</command>. Select a particular one with
        <command>prompt <literal>&lt;prompt-name&gt;</literal></command>.
        Display all available
        prompts with <command>prompt -p</command>. Except for the list and
        display commands above, you can insert the other ones in
        <filename>~/.zshrc</filename> to be automatically executed at
        shell start, with the prompt you chose.
      </para>

      <indexterm zone="zsh zsh-config">
        <primary sortas="e-etc-zsh-zshenv">/etc/zsh/zshenv</primary>
      </indexterm>

      <indexterm zone="zsh zsh-config">
        <primary sortas="e-etc-zsh-zprofile">/etc/zsh/zprofile</primary>
      </indexterm>

      <indexterm zone="zsh zsh-config">
        <primary sortas="e-etc-zsh-zshrc">/etc/zsh/zshrc</primary>
      </indexterm>

      <indexterm zone="zsh zsh-config">
        <primary sortas="e-etc-zsh-zlogin">/etc/zsh/zlogin</primary>
      </indexterm>

      <indexterm zone="zsh zsh-config">
        <primary sortas="e-etc-zsh-zlogout">/etc/zsh/zlogout</primary>
      </indexterm>

    </sect3>

    <sect3>
      <title>Configuration Information</title>

      <para>
        Update <filename>/etc/shells</filename> to include the
        <application>zsh</application> shell program names (as the
        <systemitem class="username">root</systemitem> user):
      </para>

<screen role="root"><userinput>cat &gt;&gt; /etc/shells &lt;&lt; "EOF"
<literal>/bin/zsh</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>zsh and zsh-&zsh-version; (hardlinked to each other)</seg>
        <seg>Numerous plugin helper modules under
        /usr/lib/zsh/&zsh-version;/</seg>
        <seg>/usr/{lib,share}/zsh and /usr/share/doc/zsh-&zsh-version;</seg>
      </seglistitem>
    </segmentedlist>

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

      <varlistentry id="zsh-prog">
        <term><command>zsh</command></term>
        <listitem>
          <para>
            is a shell which has command-line editing, built-in spelling
            correction, programmable command completion, shell functions (with
            autoloading), a history mechanism, and a host of other features
          </para>
          <indexterm zone="zsh zsh-prog">
            <primary sortas="b-zsh">zsh</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>