INSTALL

   1
   2                 Git installation
   3
   4 Normally you can just do "make" followed by "make install", and that
   5 will install the git programs in your own ~/bin/ directory.  If you want
   6 to do a global install, you can do
   7
   8         $ make prefix=/usr all doc info ;# as yourself
   9         # make prefix=/usr install install-doc install-html install-info ;# as root
  10
  11 (or prefix=/usr/local, of course).  Just like any program suite
  12 that uses $prefix, the built results have some paths encoded,
  13 which are derived from $prefix, so "make all; make prefix=/usr
  14 install" would not work.
  15
  16 The beginning of the Makefile documents many variables that affect the way
  17 git is built.  You can override them either from the command line, or in a
  18 config.mak file.
  19
  20 Alternatively you can use autoconf generated ./configure script to
  21 set up install paths (via config.mak.autogen), so you can write instead
  22
  23         $ make configure ;# as yourself
  24         $ ./configure --prefix=/usr ;# as yourself
  25         $ make all doc ;# as yourself
  26         # make install install-doc install-html;# as root
  27
  28
  29 Issues of note:
  30
  31  - Ancient versions of GNU Interactive Tools (pre-4.9.2) installed a
  32    program "git", whose name conflicts with this program.  But with
  33    version 4.9.2, after long hiatus without active maintenance (since
  34    around 1997), it changed its name to gnuit and the name conflict is no
  35    longer a problem.
  36
  37    NOTE: When compiled with backward compatibility option, the GNU
  38    Interactive Tools package still can install "git", but you can build it
  39    with --disable-transition option to avoid this.
  40
  41  - You can use git after building but without installing if you want
  42    to test drive it.  Simply run git found in bin-wrappers directory
  43    in the build directory, or prepend that directory to your $PATH.
  44    This however is less efficient than running an installed git, as
  45    you always need an extra fork+exec to run any git subcommand.
  46
  47    It is still possible to use git without installing by setting a few
  48    environment variables, which was the way this was done
  49    traditionally.  But using git found in bin-wrappers directory in
  50    the build directory is far simpler.  As a historical reference, the
  51    old way went like this:
  52
  53         GIT_EXEC_PATH=`pwd`
  54         PATH=`pwd`:$PATH
  55         GITPERLLIB=`pwd`/perl/blib/lib
  56         export GIT_EXEC_PATH PATH GITPERLLIB
  57
  58  - Git is reasonably self-sufficient, but does depend on a few external
  59    programs and libraries.  Git can be used without most of them by adding
  60    the approriate "NO_<LIBRARY>=YesPlease" to the make command line or
  61    config.mak file.
  62
  63         - "zlib", the compression library. Git won't build without it.
  64
  65         - "ssh" is used to push and pull over the net.
  66
  67         - A POSIX-compliant shell is required to run many scripts needed
  68           for everyday use (e.g. "bisect", "pull").
  69
  70         - "Perl" version 5.8 or later is needed to use some of the
  71           features (e.g. preparing a partial commit using "git add -i/-p",
  72           interacting with svn repositories with "git svn").  If you can
  73           live without these, use NO_PERL.
  74
  75         - "openssl" library is used by git-imap-send to use IMAP over SSL.
  76           If you don't need it, use NO_OPENSSL.
  77
  78           By default, git uses OpenSSL for SHA1 but it will use it's own
  79           library (inspired by Mozilla's) with either NO_OPENSSL or
  80           BLK_SHA1.  Also included is a version optimized for PowerPC
  81           (PPC_SHA1).
  82
  83         - "libcurl" library is used by git-http-fetch and git-fetch.  You
  84           might also want the "curl" executable for debugging purposes.
  85           If you do not use http:// or https:// repositories, you do not
  86           have to have them (use NO_CURL).
  87
  88         - "expat" library; git-http-push uses it for remote lock
  89           management over DAV.  Similar to "curl" above, this is optional
  90           (with NO_EXPAT).
  91
  92         - "wish", the Tcl/Tk windowing shell is used in gitk to show the
  93           history graphically, and in git-gui.  If you don't want gitk or
  94           git-gui, you can use NO_TCLTK.
  95
  96  - Some platform specific issues are dealt with Makefile rules,
  97    but depending on your specific installation, you may not
  98    have all the libraries/tools needed, or you may have
  99    necessary libraries at unusual locations.  Please look at the
 100    top of the Makefile to see what can be adjusted for your needs.
 101    You can place local settings in config.mak and the Makefile
 102    will include them.  Note that config.mak is not distributed;
 103    the name is reserved for local settings.
 104
 105  - To build and install documentation suite, you need to have
 106    the asciidoc/xmlto toolchain.  Because not many people are
 107    inclined to install the tools, the default build target
 108    ("make all") does _not_ build them.
 109
 110    "make doc" builds documentation in man and html formats; there are
 111    also "make man", "make html" and "make info". Note that "make html"
 112    requires asciidoc, but not xmlto. "make man" (and thus make doc)
 113    requires both.
 114
 115    "make install-doc" installs documentation in man format only; there
 116    are also "make install-man", "make install-html" and "make
 117    install-info".
 118
 119    Building and installing the info file additionally requires
 120    makeinfo and docbook2X.  Version 0.8.3 is known to work.
 121
 122    Building and installing the pdf file additionally requires
 123    dblatex.  Version 0.2.7 with asciidoc >= 8.2.7 is known to work.
 124
 125    The documentation is written for AsciiDoc 7, but by default
 126    uses some compatibility wrappers to work on AsciiDoc 8. If you have
 127    AsciiDoc 7, try "make ASCIIDOC7=YesPlease".
 128
 129    Alternatively, pre-formatted documentation is available in
 130    "html" and "man" branches of the git repository itself.  For
 131    example, you could:
 132
 133         $ mkdir manual && cd manual
 134         $ git init
 135         $ git fetch-pack git://git.kernel.org/pub/scm/git/git.git man html |
 136           while read a b
 137           do
 138             echo $a >.git/$b
 139           done
 140         $ cp .git/refs/heads/man .git/refs/heads/master
 141         $ git checkout
 142
 143    to checkout the pre-built man pages.  Also in this repository:
 144
 145         $ git checkout html
 146
 147    would instead give you a copy of what you see at:
 148
 149         http://www.kernel.org/pub/software/scm/git/docs/
 150
 151    There are also "make quick-install-doc", "make quick-install-man"
 152    and "make quick-install-html" which install preformatted man pages
 153    and html documentation.
 154    This does not require asciidoc/xmlto, but it only works from within
 155    a cloned checkout of git.git with these two extra branches, and will
 156    not work for the maintainer for obvious chicken-and-egg reasons.
 157
 158    It has been reported that docbook-xsl version 1.72 and 1.73 are
 159    buggy; 1.72 misformats manual pages for callouts, and 1.73 needs
 160    the patch in contrib/patches/docbook-xsl-manpages-charmap.patch
 161
 162    Users attempting to build the documentation on Cygwin may need to ensure
 163    that the /etc/xml/catalog file looks something like this:
 164
 165    <?xml version="1.0"?>
 166    <!DOCTYPE catalog PUBLIC
 167       "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN"
 168       "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd"
 169    >
 170    <catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog">
 171      <rewriteURI
 172        uriStartString = "http://docbook.sourceforge.net/release/xsl/current"
 173        rewritePrefix = "/usr/share/sgml/docbook/xsl-stylesheets"
 174      />
 175      <rewriteURI
 176        uriStartString="http://www.oasis-open.org/docbook/xml/4.5"
 177        rewritePrefix="/usr/share/sgml/docbook/xml-dtd-4.5"
 178      />
 179   </catalog>
 180
 181   This can be achieved with the following two xmlcatalog commands:
 182
 183   xmlcatalog --noout \
 184      --add rewriteURI \
 185         http://docbook.sourceforge.net/release/xsl/current \
 186         /usr/share/sgml/docbook/xsl-stylesheets \
 187      /etc/xml/catalog
 188
 189   xmlcatalog --noout \
 190      --add rewriteURI \
 191          http://www.oasis-open.org/docbook/xml/4.5/xsl/current \
 192          /usr/share/sgml/docbook/xml-dtd-4.5 \
 193      /etc/xml/catalog