meta-config: Fix consecutive same sections

The current coding fails to process local.conf like
the following.  Note: This example is taken from a
real use case. [1]

    [[post-config|$NEUTRON_CONF]]
    [qos]
    notification_drivers = midonet
    [[post-config|$NEUTRON_CONF]]

    [quotas]
    # x10 of default quotas (at the time of writing)
    quota_network=100
    quota_subnet=100
    quota_port=500
    quota_router=100
    quota_floatingip=500
    quota_security_group=100
    quota_security_group_rule=1000

[1] https://review.openstack.org/#/c/400627/

Closes-Bug: #1583214
Change-Id: Ie571b5fa5a33d9ed09f30ba7c7724b958ce17616

inc/meta-config

@@ -40,12 +40,10 @@ function get_meta_section {
     $CONFIG_AWK_CMD -v matchgroup=$matchgroup -v configfile=$configfile '
         BEGIN { group = "" }
         /^\[\[.+\|.*\]\]/ {
-            if (group == "") {
-                gsub("[][]", "", $1);
-                split($1, a, "|");
-                if (a[1] == matchgroup && a[2] == configfile) {
-                    group=a[1]
-                }
+            gsub("[][]", "", $1);
+            split($1, a, "|");
+            if (a[1] == matchgroup && a[2] == configfile) {
+                group=a[1]
             } else {
                 group=""
             }

tests/test_meta_config.sh

@@ -125,6 +125,14 @@ foo=bar
 [[test10|does-not-exist-dir/test.conf]]
 foo=bar
 
+[[test11|test-same.conf]]
+[DEFAULT]
+foo=bar
+
+[[test11|test-same.conf]]
+[some]
+random=config
+
 [[test-multi-sections|test-multi-sections.conf]]
 [sec-1]
 cfg_item1 = abcd
@@ -147,6 +155,9 @@ cfg_item1 = abcd
 cfg_item2 = efgh
 cfg_item2 = \${FOO_BAR_BAZ}
 
+[[test11|test-same.conf]]
+[another]
+non = sense
 EOF
 
 echo -n "get_meta_section_files: test0 doesn't exist: "
@@ -385,8 +396,24 @@ EXPECT_VAL=255
 check_result "$VAL" "$EXPECT_VAL"
 set -e
 
+echo -n "merge_config_file test11 same section: "
+rm -f test-same.conf
+merge_config_group test.conf test11
+VAL=$(cat test-same.conf)
+EXPECT_VAL='
+[DEFAULT]
+foo = bar
+
+[some]
+random = config
+
+[another]
+non = sense'
+check_result "$VAL" "$EXPECT_VAL"
+
+
 rm -f test.conf test1c.conf test2a.conf \
     test-space.conf test-equals.conf test-strip.conf \
     test-colon.conf test-env.conf test-multiline.conf \
-    test-multi-sections.conf
+    test-multi-sections.conf test-same.conf
 rm -rf test-etc