1git-http-backend(1) 2=================== 3 4NAME 5---- 6git-http-backend - Server side implementation of Git over HTTP 7 8SYNOPSIS 9-------- 10[verse] 11'git-http-backend' 12 13DESCRIPTION 14----------- 15A simple CGI program to serve the contents of a Git repository to Git 16clients accessing the repository over http:// and https:// protocols. 17The program supports clients fetching using both the smart HTTP protcol 18and the backwards-compatible dumb HTTP protocol, as well as clients 19pushing using the smart HTTP protocol. 20 21It verifies that the directory has the magic file 22"git-daemon-export-ok", and it will refuse to export any git directory 23that hasn't explicitly been marked for export this way (unless the 24GIT_HTTP_EXPORT_ALL environmental variable is set). 25 26By default, only the `upload-pack` service is enabled, which serves 27'git-fetch-pack' and 'git-ls-remote' clients, which are invoked from 28'git-fetch', 'git-pull', and 'git-clone'. If the client is authenticated, 29the `receive-pack` service is enabled, which serves 'git-send-pack' 30clients, which is invoked from 'git-push'. 31 32SERVICES 33-------- 34These services can be enabled/disabled using the per-repository 35configuration file: 36 37http.getanyfile:: 38 This serves older Git clients which are unable to use the 39 upload pack service. When enabled, clients are able to read 40 any file within the repository, including objects that are 41 no longer reachable from a branch but are still present. 42 It is enabled by default, but a repository can disable it 43 by setting this configuration item to `false`. 44 45http.uploadpack:: 46 This serves 'git-fetch-pack' and 'git-ls-remote' clients. 47 It is enabled by default, but a repository can disable it 48 by setting this configuration item to `false`. 49 50http.receivepack:: 51 This serves 'git-send-pack' clients, allowing push. It is 52 disabled by default for anonymous users, and enabled by 53 default for users authenticated by the web server. It can be 54 disabled by setting this item to `false`, or enabled for all 55 users, including anonymous users, by setting it to `true`. 56 57URL TRANSLATION 58--------------- 59To determine the location of the repository on disk, 'git-http-backend' 60concatenates the environment variables PATH_INFO, which is set 61automatically by the web server, and GIT_PROJECT_ROOT, which must be set 62manually in the web server configuration. If GIT_PROJECT_ROOT is not 63set, 'git-http-backend' reads PATH_TRANSLATED, which is also set 64automatically by the web server. 65 66EXAMPLES 67-------- 68All of the following examples map 'http://$hostname/git/foo/bar.git' 69to '/var/www/git/foo/bar.git'. 70 71Apache 2.x:: 72 Ensure mod_cgi, mod_alias, and mod_env are enabled, set 73 GIT_PROJECT_ROOT (or DocumentRoot) appropriately, and 74 create a ScriptAlias to the CGI: 75+ 76---------------------------------------------------------------- 77SetEnv GIT_PROJECT_ROOT /var/www/git 78SetEnv GIT_HTTP_EXPORT_ALL 79ScriptAlias /git/ /usr/libexec/git-core/git-http-backend/ 80---------------------------------------------------------------- 81+ 82To enable anonymous read access but authenticated write access, 83require authorization with a LocationMatch directive: 84+ 85---------------------------------------------------------------- 86<LocationMatch "^/git/.*/git-receive-pack$"> 87 AuthType Basic 88 AuthName "Git Access" 89 Require group committers 90 ... 91</LocationMatch> 92---------------------------------------------------------------- 93+ 94To require authentication for both reads and writes, use a Location 95directive around the repository, or one of its parent directories: 96+ 97---------------------------------------------------------------- 98<Location /git/private> 99 AuthType Basic 100 AuthName "Private Git Access" 101 Require group committers 102 ... 103</Location> 104---------------------------------------------------------------- 105+ 106To serve gitweb at the same url, use a ScriptAliasMatch to only 107those URLs that 'git-http-backend' can handle, and forward the 108rest to gitweb: 109+ 110---------------------------------------------------------------- 111ScriptAliasMatch \ 112 "(?x)^/git/(.*/(HEAD | \ 113 info/refs | \ 114 objects/(info/[^/]+ | \ 115 [0-9a-f]{2}/[0-9a-f]{38} | \ 116 pack/pack-[0-9a-f]{40}\.(pack|idx)) | \ 117 git-(upload|receive)-pack))$" \ 118 /usr/libexec/git-core/git-http-backend/$1 119 120ScriptAlias /git/ /var/www/cgi-bin/gitweb.cgi/ 121---------------------------------------------------------------- 122 123Accelerated static Apache 2.x:: 124 Similar to the above, but Apache can be used to return static 125 files that are stored on disk. On many systems this may 126 be more efficient as Apache can ask the kernel to copy the 127 file contents from the file system directly to the network: 128+ 129---------------------------------------------------------------- 130SetEnv GIT_PROJECT_ROOT /var/www/git 131 132AliasMatch ^/git/(.*/objects/[0-9a-f]{2}/[0-9a-f]{38})$ /var/www/git/$1 133AliasMatch ^/git/(.*/objects/pack/pack-[0-9a-f]{40}.(pack|idx))$ /var/www/git/$1 134ScriptAlias /git/ /usr/libexec/git-core/git-http-backend/ 135---------------------------------------------------------------- 136+ 137This can be combined with the gitweb configuration: 138+ 139---------------------------------------------------------------- 140SetEnv GIT_PROJECT_ROOT /var/www/git 141 142AliasMatch ^/git/(.*/objects/[0-9a-f]{2}/[0-9a-f]{38})$ /var/www/git/$1 143AliasMatch ^/git/(.*/objects/pack/pack-[0-9a-f]{40}.(pack|idx))$ /var/www/git/$1 144ScriptAliasMatch \ 145 "(?x)^/git/(.*/(HEAD | \ 146 info/refs | \ 147 objects/info/[^/]+ | \ 148 git-(upload|receive)-pack))$" \ 149 /usr/libexec/git-core/git-http-backend/$1 150ScriptAlias /git/ /var/www/cgi-bin/gitweb.cgi/ 151---------------------------------------------------------------- 152 153 154ENVIRONMENT 155----------- 156'git-http-backend' relies upon the CGI environment variables set 157by the invoking web server, including: 158 159* PATH_INFO (if GIT_PROJECT_ROOT is set, otherwise PATH_TRANSLATED) 160* REMOTE_USER 161* REMOTE_ADDR 162* CONTENT_TYPE 163* QUERY_STRING 164* REQUEST_METHOD 165 166The GIT_HTTP_EXPORT_ALL environmental variable may be passed to 167'git-http-backend' to bypass the check for the "git-daemon-export-ok" 168file in each repository before allowing export of that repository. 169 170The backend process sets GIT_COMMITTER_NAME to '$REMOTE_USER' and 171GIT_COMMITTER_EMAIL to '$\{REMOTE_USER}@http.$\{REMOTE_ADDR\}', 172ensuring that any reflogs created by 'git-receive-pack' contain some 173identifying information of the remote user who performed the push. 174 175All CGI environment variables are available to each of the hooks 176invoked by the 'git-receive-pack'. 177 178Author 179------ 180Written by Shawn O. Pearce <spearce@spearce.org>. 181 182Documentation 183-------------- 184Documentation by Shawn O. Pearce <spearce@spearce.org>. 185 186GIT 187--- 188Part of the linkgit:git[1] suite