added envs parser

build/rules/envs.rules

@@ -0,0 +1,38 @@
+#vim: set syntax=rules:
+
+init_code: {}
+
+terminals:
+  var {"${".(|:\}| + (':'.(|-\}| + e)))*.'\}'}
+  var_def {"${".|:\}|*.":-".|\}|*.'\}'}
+  escape {"$$"}
+  data {(|$| + ('$'.|${|)).|$|*}
+
+  $ !!! FIXME comment this terminal before production
+  _END_ {'\0'}
+
+nonterminals:
+  <start>
+  <end_check>
+  <program>
+  <term_list>
+  <term>
+
+rules:
+
+  <start> -> <end_check> ->> {}
+
+  $ !!! FIXME comment these two rules before production
+  <end_check> -> <program> _END_ ->> {}
+  <end_check> -> _END_ ->> {}
+
+  <program> -> <term_list> ->> {}
+
+  <term_list> -> <term_list> <term> ->> {}
+  <term_list> -> <term> ->> {}
+
+  <term> -> var  ->> {print("var: '"..rule_body(0).."'");}
+  <term> -> var_def ->> {print("var_def: '"..rule_body(0).."'");}
+  <term> -> escape ->> {print("escape: '"..rule_body(0).."'");}
+  <term> -> data ->> {print("data: '"..rule_body(0).."'");}
+

build/rules/envs.src

@@ -0,0 +1,18 @@
+{
+  "devices": [
+    "${DEVICE}",
+    "$${DEVICE}",
+    "$$${DEVICE}",
+    "$x{DEVICE}",
+    "$xx{DEVICE}",
+    "${DEVICEdefault}",
+    "${DEVICE:}",
+    "${DEVICE:default}",
+    "${DEVICE:-}",
+    "${DEVICE:-default}",
+    "${DEVICE:x-}",
+    "${DEVICE:x-default}",
+    "${DEVICE:}-}",
+    "${DEVICE:}-default}",
+  ]
+}

build/run.sh

@@ -125,6 +125,10 @@
 #echo "xpath1.rules" 1>&2
 #./yapgen --parser_descr rules/camsys/xpath1.rules --source rules/camsys/xpath1.src
 
+# - envs -
+#echo "envs.rules" 1>&2
+#./yapgen --parser_descr rules/envs.rules --source rules/envs.src
+
 # - smtp -
 #echo "smtp.rules" 1>&2
 #./yapgen --parser_descr rules/smtp.rules --source rules/smtp.src