Added configure and command line option --help.

auto/help

@@ -0,0 +1,42 @@
+
+# Copyright (C) Igor Sysoev
+# Copyright (C) NGINX, Inc.
+
+
+cat << END
+
+./configure options:
+
+  --cc=FILE            set C compiler file name, default: $CC
+  --cc-opt=OPTIONS     set additional C compiler options
+  --ld-opt=OPTIONS     set additional linker options
+
+  --prefix=DIRECTORY   set prefix for relative path names, no by default
+  --pid=FILE           set pid file name, default: $NXT_PID
+  --log=FILE           set log file name, default: $NXT_LOG
+  --modules=DIRECTORY  set modules directory, default: $NXT_MODULES
+
+  --control=ADDRESS    set address of control API socket
+                       default: $NXT_CONTROL
+
+  --user=USER          set non-privileged processes to run as specified user
+                       default: $NXT_USER
+  --group=GROUP        set non-privileged processes to run as specified group
+                       default: user's primary group
+
+  --no-ipv6            disable IPv6 support
+  --no-unix-sockets    disable Unix domain sockets support
+
+  --debug              enable debug logging
+
+
+  python OPTIONS       configure Python module
+                       run "./configure python --help" to see available options
+
+  php OPTIONS          configure PHP module
+                       run "./configure php --help" to see available options
+
+  go OPTIONS           configure Go module
+                       run "./configure go --help" to see available options
+
+END

auto/modules/conf

@@ -3,16 +3,6 @@
 # Copyright (C) NGINX, Inc.
 
 
-if [ ! -f $NXT_AUTOCONF_DATA ]; then
-   echo
-   echo Please run common $0 before configuring module \"$nxt_module\".
-   echo
-   exit 1
-fi
-
-. $NXT_AUTOCONF_DATA
-
-
 case "$nxt_module" in
 
    python)

auto/modules/go

@@ -10,7 +10,7 @@ NXT_GO=go
 for nxt_option; do
 
     case "$nxt_option" in
-        -*=*) value=`$echo "$nxt_option" | sed -e 's/[-_a-zA-Z0-9]*=//'`     ;;
+        -*=*) value=`echo "$nxt_option" | sed -e 's/[-_a-zA-Z0-9]*=//'`     ;;
            *) value="" ;;
     esac
 
@@ -29,9 +29,9 @@ END
         ;;
 
         *)
-            $echo
+            echo
-            $echo $0: error: invalid Go option \"$nxt_option\"
+            echo $0: error: invalid Go option \"$nxt_option\"
-            $echo
+            echo
             exit 1
         ;;
 
@@ -40,6 +40,16 @@ END
 done
 
 
+if [ ! -f $NXT_AUTOCONF_DATA ]; then
+   echo
+   echo Please run common $0 before configuring module \"$nxt_module\".
+   echo
+   exit 1
+fi
+
+. $NXT_AUTOCONF_DATA
+
+
 $echo "configuring Go package"
 $echo "configuring Go package ..." >> $NXT_AUTOCONF_ERR
 

auto/modules/php

@@ -9,7 +9,7 @@ shift
 for nxt_option; do
 
     case "$nxt_option" in
-        -*=*) value=`$echo "$nxt_option" | sed -e 's/[-_a-zA-Z0-9]*=//'`     ;;
+        -*=*) value=`echo "$nxt_option" | sed -e 's/[-_a-zA-Z0-9]*=//'`     ;;
            *) value="" ;;
     esac
 
@@ -21,27 +21,36 @@ for nxt_option; do
         --help)
             cat << END
 
-    --config=NAME     set php-config name
+    --config=FILE         set php-config filename
-    --module=NAME     set php module name
+    --module=NAME         set unit php module name
-    --lib-path=PATH   set path to libphp.so library
+    --lib-path=DIRECTORY  set directory path to libphp.so library
 
 END
             exit 0
         ;;
 
         *)
-            $echo
+            echo
-            $echo $0: error: invalid PHP option \"$nxt_option\"
+            echo $0: error: invalid PHP option \"$nxt_option\"
-            $echo
+            echo
             exit 1
         ;;
 
     esac
 
-
 done
 
 
+if [ ! -f $NXT_AUTOCONF_DATA ]; then
+   echo
+   echo Please run common $0 before configuring module \"$nxt_module\".
+   echo
+   exit 1
+fi
+
+. $NXT_AUTOCONF_DATA
+
+
 NXT_PHP_CONFIG=${NXT_PHP_CONFIG=php-config}
 NXT_PHP=${NXT_PHP_CONFIG%-config*}
 NXT_PHP_MODULE=${NXT_PHP_MODULE=${NXT_PHP##*/}}

auto/modules/python

@@ -9,7 +9,7 @@ shift
 for nxt_option; do
 
     case "$nxt_option" in
-        -*=*) value=`$echo "$nxt_option" | sed -e 's/[-_a-zA-Z0-9]*=//'`     ;;
+        -*=*) value=`echo "$nxt_option" | sed -e 's/[-_a-zA-Z0-9]*=//'`     ;;
            *) value="" ;;
     esac
 
@@ -21,17 +21,17 @@ for nxt_option; do
         --help)
             cat << END
 
-    --config=NAME   set python-config name
+    --config=FILE   set python-config filename
-    --module=NAME   set python module name
+    --module=NAME   set unit python module name
 
 END
             exit 0
         ;;
 
         *)
-            $echo
+            echo
-            $echo $0: error: invalid Python option \"$nxt_option\"
+            echo $0: error: invalid Python option \"$nxt_option\"
-            $echo
+            echo
             exit 1
         ;;
     esac
@@ -39,6 +39,16 @@ END
 done
 
 
+if [ ! -f $NXT_AUTOCONF_DATA ]; then
+   echo
+   echo Please run common $0 before configuring module \"$nxt_module\".
+   echo
+   exit 1
+fi
+
+. $NXT_AUTOCONF_DATA
+
+
 NXT_PYTHON_CONFIG=${NXT_PYTHON_CONFIG=python-config}
 NXT_PYTHON=${NXT_PYTHON_CONFIG%-config*}
 NXT_PYTHON_MODULE=${NXT_PYTHON_MODULE=${NXT_PYTHON##*/}}

auto/options

@@ -4,23 +4,13 @@
 # Copyright (C) NGINX, Inc.
 
 
-CC=${CC:-cc}
-
-NXT_BUILD_DIR=build
 NXT_CONFIGURE_OPTIONS=
 NXT_CFLAGS=
 NXT_CC_OPT=
 NXT_LD_OPT=
 
+NXT_BUILD_DIR=build
 NXT_PREFIX=
-NXT_PID="nginext.pid"
-NXT_LOG="nginext.log"
-NXT_MODULES="modules"
-
-NXT_CONTROL="unix:control.unit.sock"
-
-NXT_USER="nobody"
-NXT_GROUP=
 
 NXT_DEBUG=NO
 
@@ -103,7 +93,8 @@ do
 
         *)
             $echo
-            $echo "$0: error: invalid option \"$nxt_option\"".
+            $echo $0: error: invalid option \"$nxt_option\".
+            $echo Run \"$0 --help\" to see available options.
             $echo
             exit 1
         ;;

configure

@@ -30,10 +30,25 @@ NXT_AUTO_CONFIG_H=$NXT_BUILD_DIR/nxt_auto_config.h
 NXT_MAKEFILE=$NXT_BUILD_DIR/Makefile
 NXT_BIN=nginext
 
-nxt_module=${1:-no}
+
+CC=${CC:-cc}
+
+NXT_PID="nginext.pid"
+NXT_LOG="nginext.log"
+NXT_MODULES="modules"
+NXT_CONTROL="unix:control.unit.sock"
+NXT_USER="nobody"
+NXT_GROUP=
+
+nxt_module=${1:-""}
 
 case $nxt_module in
-    no|--*)
+    --help)
+        . auto/help
+        exit 0
+    ;;
+
+    ""|--*)
     ;;
 
     unit)
@@ -46,6 +61,7 @@ case $nxt_module in
     ;;
 esac
 
+
 . auto/os/test
 . auto/options
 

src/nxt_runtime.c

@@ -800,6 +800,37 @@ nxt_runtime_conf_read_cmd(nxt_task_t *task, nxt_runtime_t *rt)
     static const char  no_modules[] =
                        "option \"--modules\" requires directory\n";
 
+    static const char  help[] =
+        "\n"
+        "nginext options:\n"
+        "\n"
+        "  --version            print nginext version and configure options\n"
+        "\n"
+        "  --no-daemon          run nginext in non-daemon mode\n"
+        "\n"
+        "  --control ADDRESS    set address of control API socket\n"
+        "                       default: \"" NXT_CONTROL_SOCK "\"\n"
+        "\n"
+        "  --pid FILE           set pid file name\n"
+        "                       default: \"" NXT_PID "\"\n"
+        "\n"
+        "  --log FILE           set log file name\n"
+        "                       default: \"" NXT_LOG "\"\n"
+        "\n"
+        "  --modules DIRECTORY  set modules directory\n"
+        "                       default: \"" NXT_MODULES "\"\n"
+        "\n"
+        "  --user USER          set non-privileged processes to run"
+                                " as specified user\n"
+        "                       default: \"" NXT_USER "\"\n"
+        "\n"
+        "  --group GROUP        set non-privileged processes to run"
+                                " as specified group\n"
+        "                       default: ";
+
+    static const char  group[] = "\"" NXT_GROUP "\"\n\n";
+    static const char  primary[] = "user's primary group\n\n";
+
     argv = &nxt_process_argv[1];
 
     while (*argv != NULL) {
@@ -908,6 +939,19 @@ nxt_runtime_conf_read_cmd(nxt_task_t *task, nxt_runtime_t *rt)
             exit(0);
         }
 
+        if (nxt_strcmp(p, "--help") == 0) {
+            write(STDOUT_FILENO, help, sizeof(help) - 1);
+
+            if (sizeof(NXT_GROUP) == 1) {
+                write(STDOUT_FILENO, primary, sizeof(primary) - 1);
+
+            } else {
+                write(STDOUT_FILENO, group, sizeof(group) - 1);
+            }
+
+            exit(0);
+        }
+
         end = nxt_sprintf(buf, buf + sizeof(buf), "unknown option \"%s\"\n", p);
         write(STDERR_FILENO, buf, end - buf);