GIT-HTTP-BACKEND(1)                                        GIT-HTTP-BACKEND(1)



NAME
       git-http-backend - Server side implementation of Git over HTTP

SYNOPSIS
       git http-backend





DESCRIPTION
       A simple CGI program to serve the contents of a Git repository to Git
       clients accessing the repository over http:// and https:// protocols.
       The program supports clients fetching using both the smart HTTP
       protocol and the backwards-compatible dumb HTTP protocol, as well as
       clients pushing using the smart HTTP protocol.


       It verifies that the directory has the magic file
       "git-daemon-export-ok", and it will refuse to export any git directory
       that hasn&#8217;t explicitly been marked for export this way (unless
       the GIT_HTTP_EXPORT_ALL environmental variable is set).


       By default, only the upload-pack service is enabled, which serves git
       fetch-pack and git ls-remote clients, which are invoked from git fetch,
       git pull, and git clone. If the client is authenticated, the
       receive-pack service is enabled, which serves git send-pack clients,
       which is invoked from git push.


SERVICES
       These services can be enabled/disabled using the per-repository
       configuration file:


       http.getanyfile
              This serves Git clients older than version 1.6.6 that are unable
              to use the upload pack service. When enabled, clients are able
              to read any file within the repository, including objects that
              are no longer reachable from a branch but are still present. It
              is enabled by default, but a repository can disable it by
              setting this configuration item to false.


       http.uploadpack
              This serves git fetch-pack and git ls-remote clients. It is
              enabled by default, but a repository can disable it by setting
              this configuration item to false.


       http.receivepack
              This serves git send-pack clients, allowing push. It is disabled
              by default for anonymous users, and enabled by default for users
              authenticated by the web server. It can be disabled by setting
              this item to false, or enabled for all users, including
              anonymous users, by setting it to true.


URL TRANSLATION
       To determine the location of the repository on disk, git http-backend
       concatenates the environment variables PATH_INFO, which is set
       automatically by the web server, and GIT_PROJECT_ROOT, which must be
       set manually in the web server configuration. If GIT_PROJECT_ROOT is
       not set, git http-backend reads PATH_TRANSLATED, which is also set
       automatically by the web server.


EXAMPLES
       All of the following examples map http://$hostname/git/foo/bar.git to
       /var/www/git/foo/bar.git.


       Apache 2.x
              Ensure mod_cgi, mod_alias, and mod_env are enabled, set
              GIT_PROJECT_ROOT (or DocumentRoot) appropriately, and create a
              ScriptAlias to the CGI:


              SetEnv GIT_PROJECT_ROOT /var/www/git
              SetEnv GIT_HTTP_EXPORT_ALL
              ScriptAlias /git/ /usr/libexec/git-core/git-http-backend/


              To enable anonymous read access but authenticated write access,
              require authorization with a LocationMatch directive:


              <LocationMatch "^/git/.*/git-receive-pack$">
                      AuthType Basic
                      AuthName "Git Access"
                      Require group committers
                      ...
              </LocationMatch>


              To require authentication for both reads and writes, use a
              Location directive around the repository, or one of its parent
              directories:


              <Location /git/private>
                      AuthType Basic
                      AuthName "Private Git Access"
                      Require group committers
                      ...
              </Location>


              To serve gitweb at the same url, use a ScriptAliasMatch to only
              those URLs that git http-backend can handle, and forward the
              rest to gitweb:


              ScriptAliasMatch \
                      "(?x)^/git/(.*/(HEAD | \
                                      info/refs | \
                                      objects/(info/[^/]+ | \
                                               [0-9a-f]{2}/[0-9a-f]{38} | \
                                               pack/pack-[0-9a-f]{40}\.(pack|idx)) | \
                                      git-(upload|receive)-pack))$" \
                      /usr/libexec/git-core/git-http-backend/$1

              ScriptAlias /git/ /var/www/cgi-bin/gitweb.cgi/



       Accelerated static Apache 2.x
              Similar to the above, but Apache can be used to return static
              files that are stored on disk. On many systems this may be more
              efficient as Apache can ask the kernel to copy the file contents
              from the file system directly to the network:


              SetEnv GIT_PROJECT_ROOT /var/www/git

              AliasMatch ^/git/(.*/objects/[0-9a-f]{2}/[0-9a-f]{38})$          /var/www/git/$1
              AliasMatch ^/git/(.*/objects/pack/pack-[0-9a-f]{40}.(pack|idx))$ /var/www/git/$1
              ScriptAlias /git/ /usr/libexec/git-core/git-http-backend/


              This can be combined with the gitweb configuration:


              SetEnv GIT_PROJECT_ROOT /var/www/git

              AliasMatch ^/git/(.*/objects/[0-9a-f]{2}/[0-9a-f]{38})$          /var/www/git/$1
              AliasMatch ^/git/(.*/objects/pack/pack-[0-9a-f]{40}.(pack|idx))$ /var/www/git/$1
              ScriptAliasMatch \
                      "(?x)^/git/(.*/(HEAD | \
                                      info/refs | \
                                      objects/info/[^/]+ | \
                                      git-(upload|receive)-pack))$" \
                      /usr/libexec/git-core/git-http-backend/$1
              ScriptAlias /git/ /var/www/cgi-bin/gitweb.cgi/



ENVIRONMENT
       git http-backend relies upon the CGI environment variables set by the
       invoking web server, including:


       o  PATH_INFO (if GIT_PROJECT_ROOT is set, otherwise PATH_TRANSLATED)

       o  REMOTE_USER

       o  REMOTE_ADDR

       o  CONTENT_TYPE

       o  QUERY_STRING

       o  REQUEST_METHOD

       The GIT_HTTP_EXPORT_ALL environmental variable may be passed to
       git-http-backend to bypass the check for the "git-daemon-export-ok"
       file in each repository before allowing export of that repository.


       The backend process sets GIT_COMMITTER_NAME to $REMOTE_USER and
       GIT_COMMITTER_EMAIL to ${REMOTE_USER}@http.${REMOTE_ADDR}, ensuring
       that any reflogs created by git-receive-pack contain some identifying
       information of the remote user who performed the push.


       All CGI environment variables are available to each of the hooks
       invoked by the git-receive-pack.


AUTHOR
       Written by Shawn O. Pearce <spearce@spearce.org:
       mailto:spearce@spearce.org>.


DOCUMENTATION
       Documentation by Shawn O. Pearce <spearce@spearce.org:
       mailto:spearce@spearce.org>.


GIT
       Part of the git(1) suite




                                                           GIT-HTTP-BACKEND(1)
