INSTALL - jrn/git - Git at Google


 		Git installation

 Normally you can just do "make" followed by "make install", and that
 will install the git programs in your own ~/bin/ directory.  If you want
 to do a global install, you can do

 	$ make prefix=/usr all doc info ;# as yourself
 	# make prefix=/usr install install-doc install-html install-info ;# as root

 (or prefix=/usr/local, of course).  Just like any program suite
 that uses $prefix, the built results have some paths encoded,
 which are derived from $prefix, so "make all; make prefix=/usr
 install" would not work.

 The beginning of the Makefile documents many variables that affect the way
 git is built.  You can override them either from the command line, or in a
 config.mak file.

 Alternatively you can use autoconf generated ./configure script to
 set up install paths (via config.mak.autogen), so you can write instead

 	$ make configure ;# as yourself
 	$ ./configure --prefix=/usr ;# as yourself
 	$ make all doc ;# as yourself
 	# make install install-doc install-html;# as root


 Issues of note:

  - Ancient versions of GNU Interactive Tools (pre-4.9.2) installed a
    program "git", whose name conflicts with this program.  But with
    version 4.9.2, after long hiatus without active maintenance (since
    around 1997), it changed its name to gnuit and the name conflict is no
    longer a problem.

    NOTE: When compiled with backward compatibility option, the GNU
    Interactive Tools package still can install "git", but you can build it
    with --disable-transition option to avoid this.

  - You can use git after building but without installing if you want
    to test drive it.  Simply run git found in bin-wrappers directory
    in the build directory, or prepend that directory to your $PATH.
    This however is less efficient than running an installed git, as
    you always need an extra fork+exec to run any git subcommand.

    It is still possible to use git without installing by setting a few
    environment variables, which was the way this was done
    traditionally.  But using git found in bin-wrappers directory in
    the build directory is far simpler.  As a historical reference, the
    old way went like this:

 	GIT_EXEC_PATH=`pwd`
 	PATH=`pwd`:$PATH
 	GITPERLLIB=`pwd`/perl/blib/lib
 	export GIT_EXEC_PATH PATH GITPERLLIB

  - Git is reasonably self-sufficient, but does depend on a few external
    programs and libraries.  Git can be used without most of them by adding
    the approriate "NO_<LIBRARY>=YesPlease" to the make command line or
    config.mak file.

 	- "zlib", the compression library. Git won't build without it.

 	- "ssh" is used to push and pull over the net.

 	- A POSIX-compliant shell is required to run many scripts needed
 	  for everyday use (e.g. "bisect", "pull").

 	- "Perl" version 5.8 or later is needed to use some of the
 	  features (e.g. preparing a partial commit using "git add -i/-p",
 	  interacting with svn repositories with "git svn").  If you can
 	  live without these, use NO_PERL.

 	- "openssl" library is used by git-imap-send to use IMAP over SSL.
 	  If you don't need it, use NO_OPENSSL.

 	  By default, git uses OpenSSL for SHA1 but it will use it's own
 	  library (inspired by Mozilla's) with either NO_OPENSSL or
 	  BLK_SHA1.  Also included is a version optimized for PowerPC
 	  (PPC_SHA1).

 	- "libcurl" library is used by git-http-fetch and git-fetch.  You
 	  might also want the "curl" executable for debugging purposes.
 	  If you do not use http:// or https:// repositories, you do not
 	  have to have them (use NO_CURL).

 	- "expat" library; git-http-push uses it for remote lock
 	  management over DAV.  Similar to "curl" above, this is optional
 	  (with NO_EXPAT).

 	- "wish", the Tcl/Tk windowing shell is used in gitk to show the
 	  history graphically, and in git-gui.  If you don't want gitk or
 	  git-gui, you can use NO_TCLTK.

  - Some platform specific issues are dealt with Makefile rules,
    but depending on your specific installation, you may not
    have all the libraries/tools needed, or you may have
    necessary libraries at unusual locations.  Please look at the
    top of the Makefile to see what can be adjusted for your needs.
    You can place local settings in config.mak and the Makefile
    will include them.  Note that config.mak is not distributed;
    the name is reserved for local settings.

  - To build and install documentation suite, you need to have
    the asciidoc/xmlto toolchain.  Because not many people are
    inclined to install the tools, the default build target
    ("make all") does _not_ build them.

    "make doc" builds documentation in man and html formats; there are
    also "make man", "make html" and "make info". Note that "make html"
    requires asciidoc, but not xmlto. "make man" (and thus make doc)
    requires both.

    "make install-doc" installs documentation in man format only; there
    are also "make install-man", "make install-html" and "make
    install-info".

    Building and installing the info file additionally requires
    makeinfo and docbook2X.  Version 0.8.3 is known to work.

    Building and installing the pdf file additionally requires
    dblatex.  Version 0.2.7 with asciidoc >= 8.2.7 is known to work.

    The documentation is written for AsciiDoc 7, but by default
    uses some compatibility wrappers to work on AsciiDoc 8. If you have
    AsciiDoc 7, try "make ASCIIDOC7=YesPlease".

    Alternatively, pre-formatted documentation is available in
    "html" and "man" branches of the git repository itself.  For
    example, you could:

 	$ mkdir manual && cd manual
 	$ git init
 	$ git fetch-pack git://git.kernel.org/pub/scm/git/git.git man html |
 	  while read a b
 	  do
 	    echo $a >.git/$b
 	  done
 	$ cp .git/refs/heads/man .git/refs/heads/master
 	$ git checkout

    to checkout the pre-built man pages.  Also in this repository:

 	$ git checkout html

    would instead give you a copy of what you see at:

 	http://www.kernel.org/pub/software/scm/git/docs/

    There are also "make quick-install-doc", "make quick-install-man"
    and "make quick-install-html" which install preformatted man pages
    and html documentation.
    This does not require asciidoc/xmlto, but it only works from within
    a cloned checkout of git.git with these two extra branches, and will
    not work for the maintainer for obvious chicken-and-egg reasons.

    It has been reported that docbook-xsl version 1.72 and 1.73 are
    buggy; 1.72 misformats manual pages for callouts, and 1.73 needs
    the patch in contrib/patches/docbook-xsl-manpages-charmap.patch

    Users attempting to build the documentation on Cygwin may need to ensure
    that the /etc/xml/catalog file looks something like this:

    <?xml version="1.0"?>
    <!DOCTYPE catalog PUBLIC
       "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN"
       "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd"
    >
    <catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog">
      <rewriteURI
        uriStartString = "http://docbook.sourceforge.net/release/xsl/current"
        rewritePrefix = "/usr/share/sgml/docbook/xsl-stylesheets"
      />
      <rewriteURI
        uriStartString="http://www.oasis-open.org/docbook/xml/4.5"
        rewritePrefix="/usr/share/sgml/docbook/xml-dtd-4.5"
      />
   </catalog>

   This can be achieved with the following two xmlcatalog commands:

   xmlcatalog --noout \
      --add rewriteURI \
         http://docbook.sourceforge.net/release/xsl/current \
         /usr/share/sgml/docbook/xsl-stylesheets \
      /etc/xml/catalog

   xmlcatalog --noout \
      --add rewriteURI \
          http://www.oasis-open.org/docbook/xml/4.5/xsl/current \
          /usr/share/sgml/docbook/xml-dtd-4.5 \
      /etc/xml/catalog

	Git installation

	Normally you can just do "make" followed by "make install", and that
	will install the git programs in your own ~/bin/ directory. If you want
	to do a global install, you can do

	$ make prefix=/usr all doc info ;# as yourself
	# make prefix=/usr install install-doc install-html install-info ;# as root

	(or prefix=/usr/local, of course). Just like any program suite
	that uses $prefix, the built results have some paths encoded,
	which are derived from $prefix, so "make all; make prefix=/usr
	install" would not work.

	The beginning of the Makefile documents many variables that affect the way
	git is built. You can override them either from the command line, or in a
	config.mak file.

	Alternatively you can use autoconf generated ./configure script to
	set up install paths (via config.mak.autogen), so you can write instead

	$ make configure ;# as yourself
	$ ./configure --prefix=/usr ;# as yourself
	$ make all doc ;# as yourself
	# make install install-doc install-html;# as root


	Issues of note:

	- Ancient versions of GNU Interactive Tools (pre-4.9.2) installed a
	program "git", whose name conflicts with this program. But with
	version 4.9.2, after long hiatus without active maintenance (since
	around 1997), it changed its name to gnuit and the name conflict is no
	longer a problem.

	NOTE: When compiled with backward compatibility option, the GNU
	Interactive Tools package still can install "git", but you can build it
	with --disable-transition option to avoid this.

	- You can use git after building but without installing if you want
	to test drive it. Simply run git found in bin-wrappers directory
	in the build directory, or prepend that directory to your $PATH.
	This however is less efficient than running an installed git, as
	you always need an extra fork+exec to run any git subcommand.

	It is still possible to use git without installing by setting a few
	environment variables, which was the way this was done
	traditionally. But using git found in bin-wrappers directory in
	the build directory is far simpler. As a historical reference, the
	old way went like this:

	GIT_EXEC_PATH=`pwd`
	PATH=`pwd`:$PATH
	GITPERLLIB=`pwd`/perl/blib/lib
	export GIT_EXEC_PATH PATH GITPERLLIB

	- Git is reasonably self-sufficient, but does depend on a few external
	programs and libraries. Git can be used without most of them by adding
	the approriate "NO_<LIBRARY>=YesPlease" to the make command line or
	config.mak file.

	- "zlib", the compression library. Git won't build without it.

	- "ssh" is used to push and pull over the net.

	- A POSIX-compliant shell is required to run many scripts needed
	for everyday use (e.g. "bisect", "pull").

	- "Perl" version 5.8 or later is needed to use some of the
	features (e.g. preparing a partial commit using "git add -i/-p",
	interacting with svn repositories with "git svn"). If you can
	live without these, use NO_PERL.

	- "openssl" library is used by git-imap-send to use IMAP over SSL.
	If you don't need it, use NO_OPENSSL.

	By default, git uses OpenSSL for SHA1 but it will use it's own
	library (inspired by Mozilla's) with either NO_OPENSSL or
	BLK_SHA1. Also included is a version optimized for PowerPC
	(PPC_SHA1).

	- "libcurl" library is used by git-http-fetch and git-fetch. You
	might also want the "curl" executable for debugging purposes.
	If you do not use http:// or https:// repositories, you do not
	have to have them (use NO_CURL).

	- "expat" library; git-http-push uses it for remote lock
	management over DAV. Similar to "curl" above, this is optional
	(with NO_EXPAT).

	- "wish", the Tcl/Tk windowing shell is used in gitk to show the
	history graphically, and in git-gui. If you don't want gitk or
	git-gui, you can use NO_TCLTK.

	- Some platform specific issues are dealt with Makefile rules,
	but depending on your specific installation, you may not
	have all the libraries/tools needed, or you may have
	necessary libraries at unusual locations. Please look at the
	top of the Makefile to see what can be adjusted for your needs.
	You can place local settings in config.mak and the Makefile
	will include them. Note that config.mak is not distributed;
	the name is reserved for local settings.

	- To build and install documentation suite, you need to have
	the asciidoc/xmlto toolchain. Because not many people are
	inclined to install the tools, the default build target
	("make all") does _not_ build them.

	"make doc" builds documentation in man and html formats; there are
	also "make man", "make html" and "make info". Note that "make html"
	requires asciidoc, but not xmlto. "make man" (and thus make doc)
	requires both.

	"make install-doc" installs documentation in man format only; there
	are also "make install-man", "make install-html" and "make
	install-info".

	Building and installing the info file additionally requires
	makeinfo and docbook2X. Version 0.8.3 is known to work.

	Building and installing the pdf file additionally requires
	dblatex. Version 0.2.7 with asciidoc >= 8.2.7 is known to work.

	The documentation is written for AsciiDoc 7, but by default
	uses some compatibility wrappers to work on AsciiDoc 8. If you have
	AsciiDoc 7, try "make ASCIIDOC7=YesPlease".

	Alternatively, pre-formatted documentation is available in
	"html" and "man" branches of the git repository itself. For
	example, you could:

	$ mkdir manual && cd manual
	$ git init
	$ git fetch-pack git://git.kernel.org/pub/scm/git/git.git man html \|
	while read a b
	do
	echo $a >.git/$b
	done
	$ cp .git/refs/heads/man .git/refs/heads/master
	$ git checkout

	to checkout the pre-built man pages. Also in this repository:

	$ git checkout html

	would instead give you a copy of what you see at:

	http://www.kernel.org/pub/software/scm/git/docs/

	There are also "make quick-install-doc", "make quick-install-man"
	and "make quick-install-html" which install preformatted man pages
	and html documentation.
	This does not require asciidoc/xmlto, but it only works from within
	a cloned checkout of git.git with these two extra branches, and will
	not work for the maintainer for obvious chicken-and-egg reasons.

	It has been reported that docbook-xsl version 1.72 and 1.73 are
	buggy; 1.72 misformats manual pages for callouts, and 1.73 needs
	the patch in contrib/patches/docbook-xsl-manpages-charmap.patch

	Users attempting to build the documentation on Cygwin may need to ensure
	that the /etc/xml/catalog file looks something like this:

	<?xml version="1.0"?>
	<!DOCTYPE catalog PUBLIC
	"-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN"
	"http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd"
	>
	<catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog">
	<rewriteURI
	uriStartString = "http://docbook.sourceforge.net/release/xsl/current"
	rewritePrefix = "/usr/share/sgml/docbook/xsl-stylesheets"
	/>
	<rewriteURI
	uriStartString="http://www.oasis-open.org/docbook/xml/4.5"
	rewritePrefix="/usr/share/sgml/docbook/xml-dtd-4.5"
	/>
	</catalog>

	This can be achieved with the following two xmlcatalog commands:

	xmlcatalog --noout \
	--add rewriteURI \
	http://docbook.sourceforge.net/release/xsl/current \
	/usr/share/sgml/docbook/xsl-stylesheets \
	/etc/xml/catalog

	xmlcatalog --noout \
	--add rewriteURI \
	http://www.oasis-open.org/docbook/xml/4.5/xsl/current \
	/usr/share/sgml/docbook/xml-dtd-4.5 \
	/etc/xml/catalog