- add script to check for missing help entries of config options

  Currently we have these errors:

./modutils/Config.in: No helptext for 'CONFIG_FEATURE_QUERY_MODULE_INTERFACE'
./networking/Config.in: No helptext for 'CONFIG_IPADDR'
./networking/Config.in: No helptext for 'CONFIG_IPLINK'
./networking/Config.in: No helptext for 'CONFIG_IPROUTE'
./networking/Config.in: No helptext for 'CONFIG_IPTUNNEL'
./coreutils/Config.in: No helptext for 'CONFIG_UNIX2DOS'

2 files changed, 42 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index 8c7cb41be..9e9e95755 100644
--- a/Makefile
+++ b/Makefile
@@ -133,6 +133,7 @@ help:
         @echo
         @echo 'Development:'
         @echo '  check                  - run the test suite for all applets'
+        @echo '  checkhelp              - check for missing help-entries in Config.in'
         @echo '  randconfig             - generate a random configuration'
         @echo '  release                - create a distribution tarball'
         @echo '  sizes                  - show size of all enabled busybox symbols'
@@ -350,6 +351,10 @@ check test: busybox
         bindir=$(top_builddir) srcdir=$(top_srcdir)/testsuite \
         $(top_srcdir)/testsuite/runtest $(CHECK_VERBOSE)
 
+.PHONY: checkhelp
+checkhelp:
+        $(Q)$(top_srcdir)/scripts/checkhelp.awk \
+                $(wildcard $(patsubst %,%/Config.in,$(SRC_DIRS) ./))
 .PHONY: sizes
 sizes: busybox_unstripped
         $(NM) --size-sort $(<)
diff --git a/scripts/checkhelp.awk b/scripts/checkhelp.awk
new file mode 100755
index 000000000..1a7e0ea8e
--- /dev/null
+++ b/scripts/checkhelp.awk
@@ -0,0 +1,37 @@
+#!/usr/bin/awk -f
+# AWK script to check for missing help entries for config options
+#
+# Copyright (C) 2006 Bernhard Fischer
+# 
+# This file is distributed under the terms and conditions of the
+# MIT/X public licenses. See http://opensource.org/licenses/mit-license.html
+# and notice http://www.gnu.org/licenses/license-list.html#X11License
+
+
+/^choice/ { is_choice = 1; }
+/^endchoice/ { is_choice = 0; }
+/^config/ {
+        pos++;
+        conf[pos] = $2;
+        file[pos] = FILENAME;
+        if (is_choice) {
+                help[pos] = 1; # do not warn about 'choice' config entries.
+        } else {
+                help[pos] = 0;
+        }
+}
+/^[[:space:]]*help[[:space:]]*$/ {
+        help[pos] = 1;
+}
+BEGIN {
+        pos = -1;
+        is_choice = 0;
+}
+END {
+        for (i = 0; i < pos; i++) {
+#       printf("%s: help for #%i '%s' == %i\n", file[i], i, conf[i], help[i]);
+                if (help[i] == 0) {
+                        printf("%s: No helptext for '%s'\n", file[i], conf[i]);
+                }
+        }
+}