[PATCH] Extract out version info function

[Kurtis Nusbaum]

# HG changeset patch
# User Kurtis Nusbaum <klnusbaum at gmail.com>
# Date 1436715098 25200
#      Sun Jul 12 08:31:38 2015 -0700
# Node ID 8d31439f186889335c5fd6d14be70c55e5b99fbc
# Parent  dcae651b2a0cbd3de2f1fd5cf5b8c72627db94fd
Extract out version info function

The code for displaying version info and configuration info seemed to be cluttering up the
main function. I was finding it hard to read main. This extracts out all of the logic
for displaying version and configuration info into its own function, thus making
main easier to read.

diff -r dcae651b2a0c -r 8d31439f1868 src/core/nginx.c
--- a/src/core/nginx.c	Tue Jul 07 16:38:49 2015 +0300
+++ b/src/core/nginx.c	Sun Jul 12 08:31:38 2015 -0700
@@ -9,7 +9,7 @@
 #include <ngx_core.h>
 #include <nginx.h>
 
-
+static void ngx_display_version_info();
 static ngx_int_t ngx_add_inherited_sockets(ngx_cycle_t *cycle);
 static ngx_int_t ngx_get_options(int argc, char *const *argv);
 static ngx_int_t ngx_process_options(ngx_cycle_t *cycle);
@@ -194,68 +194,11 @@
     }
 
     if (ngx_show_version) {
-        ngx_write_stderr("nginx version: " NGINX_VER_BUILD NGX_LINEFEED);
+        ngx_display_version_info();
+    }
 
-        if (ngx_show_help) {
-            ngx_write_stderr(
-                "Usage: nginx [-?hvVtTq] [-s signal] [-c filename] "
-                             "[-p prefix] [-g directives]" NGX_LINEFEED
-                             NGX_LINEFEED
-                "Options:" NGX_LINEFEED
-                "  -?,-h         : this help" NGX_LINEFEED
-                "  -v            : show version and exit" NGX_LINEFEED
-                "  -V            : show version and configure options then exit"
-                                   NGX_LINEFEED
-                "  -t            : test configuration and exit" NGX_LINEFEED
-                "  -T            : test configuration, dump it and exit"
-                                   NGX_LINEFEED
-                "  -q            : suppress non-error messages "
-                                   "during configuration testing" NGX_LINEFEED
-                "  -s signal     : send signal to a master process: "
-                                   "stop, quit, reopen, reload" NGX_LINEFEED
-#ifdef NGX_PREFIX
-                "  -p prefix     : set prefix path (default: "
-                                   NGX_PREFIX ")" NGX_LINEFEED
-#else
-                "  -p prefix     : set prefix path (default: NONE)" NGX_LINEFEED
-#endif
-                "  -c filename   : set configuration file (default: "
-                                   NGX_CONF_PATH ")" NGX_LINEFEED
-                "  -g directives : set global directives out of configuration "
-                                   "file" NGX_LINEFEED NGX_LINEFEED
-                );
-        }
-
-        if (ngx_show_configure) {
-
-#ifdef NGX_COMPILER
-            ngx_write_stderr("built by " NGX_COMPILER NGX_LINEFEED);
-#endif
-
-#if (NGX_SSL)
-            if (SSLeay() == SSLEAY_VERSION_NUMBER) {
-                ngx_write_stderr("built with " OPENSSL_VERSION_TEXT
-                                 NGX_LINEFEED);
-            } else {
-                ngx_write_stderr("built with " OPENSSL_VERSION_TEXT
-                                 " (running with ");
-                ngx_write_stderr((char *) (uintptr_t)
-                                 SSLeay_version(SSLEAY_VERSION));
-                ngx_write_stderr(")" NGX_LINEFEED);
-            }
-#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
-            ngx_write_stderr("TLS SNI support enabled" NGX_LINEFEED);
-#else
-            ngx_write_stderr("TLS SNI support disabled" NGX_LINEFEED);
-#endif
-#endif
-
-            ngx_write_stderr("configure arguments:" NGX_CONFIGURE NGX_LINEFEED);
-        }
-
-        if (!ngx_test_config) {
-            return 0;
-        }
+    if (ngx_show_version && !ngx_test_config) {
+        return 0;
     }
 
     /* TODO */ ngx_max_sockets = -1;
@@ -418,6 +361,68 @@
     return 0;
 }
 
+static void
+ngx_display_version_info()
+{
+    ngx_write_stderr("nginx version: " NGINX_VER_BUILD NGX_LINEFEED);
+
+    if (ngx_show_help) {
+        ngx_write_stderr(
+            "Usage: nginx [-?hvVtTq] [-s signal] [-c filename] "
+                         "[-p prefix] [-g directives]" NGX_LINEFEED
+                         NGX_LINEFEED
+            "Options:" NGX_LINEFEED
+            "  -?,-h         : this help" NGX_LINEFEED
+            "  -v            : show version and exit" NGX_LINEFEED
+            "  -V            : show version and configure options then exit"
+                               NGX_LINEFEED
+            "  -t            : test configuration and exit" NGX_LINEFEED
+            "  -T            : test configuration, dump it and exit"
+                               NGX_LINEFEED
+            "  -q            : suppress non-error messages "
+                               "during configuration testing" NGX_LINEFEED
+            "  -s signal     : send signal to a master process: "
+                               "stop, quit, reopen, reload" NGX_LINEFEED
+#ifdef NGX_PREFIX
+            "  -p prefix     : set prefix path (default: "
+                               NGX_PREFIX ")" NGX_LINEFEED
+#else
+            "  -p prefix     : set prefix path (default: NONE)" NGX_LINEFEED
+#endif
+            "  -c filename   : set configuration file (default: "
+                               NGX_CONF_PATH ")" NGX_LINEFEED
+            "  -g directives : set global directives out of configuration "
+                               "file" NGX_LINEFEED NGX_LINEFEED
+            );
+    }
+
+    if (ngx_show_configure) {
+
+#ifdef NGX_COMPILER
+        ngx_write_stderr("built by " NGX_COMPILER NGX_LINEFEED);
+#endif
+
+#if (NGX_SSL)
+        if (SSLeay() == SSLEAY_VERSION_NUMBER) {
+            ngx_write_stderr("built with " OPENSSL_VERSION_TEXT
+                             NGX_LINEFEED);
+        } else {
+            ngx_write_stderr("built with " OPENSSL_VERSION_TEXT
+                             " (running with ");
+            ngx_write_stderr((char *) (uintptr_t)
+                             SSLeay_version(SSLEAY_VERSION));
+            ngx_write_stderr(")" NGX_LINEFEED);
+        }
+#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
+        ngx_write_stderr("TLS SNI support enabled" NGX_LINEFEED);
+#else
+        ngx_write_stderr("TLS SNI support disabled" NGX_LINEFEED);
+#endif
+#endif
+
+        ngx_write_stderr("configure arguments:" NGX_CONFIGURE NGX_LINEFEED);
+    }
+}
 
 static ngx_int_t
 ngx_add_inherited_sockets(ngx_cycle_t *cycle)