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http-backend: add GIT_PROJECT_ROOT environment var
Add a new environment variable, GIT_PROJECT_ROOT, to override the method of using PATH_TRANSLATED to find the git repository on disk. This makes it much easier to configure the web server, especially when the web server's DocumentRoot does not contain the git repositories, which is the usual case. Signed-off-by: Mark Lodato <lodatom@gmail.com> Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Mark Lodato
Junio C Hamano
parent
556cfa3b6d
commit
917adc0360
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@ -41,29 +41,24 @@ http.receivepack::
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URL TRANSLATION
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---------------
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'git-http-backend' relies on the invoking web server to perform
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URL to path translation, and store the repository path into the
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PATH_TRANSLATED environment variable. Most web servers will do
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this translation automatically, resolving the suffix after the
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CGI name relative to the server's document root.
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To determine the location of the repository on disk, 'git-http-backend'
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concatenates the environment variables PATH_INFO, which is set
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automatically by the web server, and GIT_PROJECT_ROOT, which must be set
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manually in the web server configuration. If GIT_PROJECT_ROOT is not
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set, 'git-http-backend' reads PATH_TRANSLATED, which is also set
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automatically by the web server.
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EXAMPLES
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--------
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Apache 2.x::
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To serve all Git repositories contained within the '/git/'
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subdirectory of the DocumentRoot, ensure mod_cgi and
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mod_alias are enabled, and create a ScriptAlias to the CGI:
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Ensure mod_cgi, mod_alias, and mod_env are enabled, set
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GIT_PROJECT_ROOT (or DocumentRoot) appropriately, and
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create a ScriptAlias to the CGI:
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+
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----------------------------------------------------------------
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ScriptAlias /git/ /usr/libexec/git-core/git-http-backend/git/
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<Directory /usr/libexec/git-core>
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Options None
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</Directory>
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<Files /usr/libexec/git-core/git-http-backend>
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Options ExecCGI
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</Files>
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SetEnv GIT_PROJECT_ROOT /var/www/git
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ScriptAlias /git/ /usr/libexec/git-core/git-http-backend/
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----------------------------------------------------------------
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+
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To enable anonymous read access but authenticated write access,
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@ -78,16 +73,16 @@ require authorization with a LocationMatch directive:
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</LocationMatch>
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----------------------------------------------------------------
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+
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To require authentication for both reads and writes, use a Directory
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To require authentication for both reads and writes, use a Location
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directive around the repository, or one of its parent directories:
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+
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----------------------------------------------------------------
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<Directory /var/www/git/private>
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<Location /git/private>
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AuthType Basic
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AuthName "Private Git Access"
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Require group committers
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...
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</Directory>
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</Location>
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----------------------------------------------------------------
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Accelerated static Apache 2.x::
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@ -97,9 +92,9 @@ Accelerated static Apache 2.x::
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file contents from the file system directly to the network:
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+
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----------------------------------------------------------------
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DocumentRoot /var/www
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SetEnv GIT_PROJECT_ROOT /var/www/git
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ScriptAlias /git/ /usr/libexec/git-core/git-http-backend/git/
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ScriptAlias /git/ /usr/libexec/git-core/git-http-backend/
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Alias /git_static/ /var/www/git/
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RewriteEngine on
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@ -114,7 +109,7 @@ ENVIRONMENT
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'git-http-backend' relies upon the CGI environment variables set
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by the invoking web server, including:
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* PATH_TRANSLATED
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* PATH_INFO (if GIT_PROJECT_ROOT is set, otherwise PATH_TRANSLATED)
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* REMOTE_USER
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* REMOTE_ADDR
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* CONTENT_TYPE
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@ -528,6 +528,26 @@ static NORETURN void die_webcgi(const char *err, va_list params)
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exit(0);
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}
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static char* getdir(void)
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{
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struct strbuf buf = STRBUF_INIT;
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char *pathinfo = getenv("PATH_INFO");
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char *root = getenv("GIT_PROJECT_ROOT");
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char *path = getenv("PATH_TRANSLATED");
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if (root && *root) {
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if (!pathinfo || !*pathinfo)
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die("GIT_PROJECT_ROOT is set but PATH_INFO is not");
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strbuf_addstr(&buf, root);
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strbuf_addstr(&buf, pathinfo);
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return strbuf_detach(&buf, NULL);
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} else if (path && *path) {
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return xstrdup(path);
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} else
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die("No GIT_PROJECT_ROOT or PATH_TRANSLATED from server");
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return NULL;
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}
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static struct service_cmd {
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const char *method;
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const char *pattern;
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@ -549,7 +569,7 @@ static struct service_cmd {
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int main(int argc, char **argv)
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{
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char *method = getenv("REQUEST_METHOD");
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char *dir = getenv("PATH_TRANSLATED");
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char *dir;
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struct service_cmd *cmd = NULL;
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char *cmd_arg = NULL;
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int i;
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@ -561,8 +581,7 @@ int main(int argc, char **argv)
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die("No REQUEST_METHOD from server");
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if (!strcmp(method, "HEAD"))
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method = "GET";
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if (!dir)
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die("No PATH_TRANSLATED from server");
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dir = getdir();
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for (i = 0; i < ARRAY_SIZE(services); i++) {
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struct service_cmd *c = &services[i];
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