diff --git a/sh/alias/git.sh b/sh/alias/git.sh
index 4519028..3e6386e 100644
--- a/sh/alias/git.sh
+++ b/sh/alias/git.sh
@@ -1,5 +1,3 @@
-# large set of aliases for git commands
-
 RWX_GIT_LOG_FORMAT="\
 %C(auto)%h%d
 S %C(red)%GS
diff --git a/sh/doc.awk b/sh/doc.awk
new file mode 100644
index 0000000..f36b7b6
--- /dev/null
+++ b/sh/doc.awk
@@ -0,0 +1,83 @@
+function append(line) {
+    if (doc) {
+        doc = doc "\n"
+    }
+    doc = doc line
+}
+
+function output(name) {
+    print name
+    print doc
+    exit
+}
+
+function reset() {
+    doc = ""
+}
+
+BEGIN {
+    RE_ANY = "(.*)"
+    RE_NAME = "([_A-Za-z][_0-9A-Za-z]*)"
+    RE_SPACE = "[[:space:]]"
+    RE_SPACES = RE_SPACE "*"
+
+    RE_BEGIN = "^"
+    RE_END = RE_SPACES "$"
+    RE_FUNC = RE_SPACES "\\(" RE_SPACES "\\)" RE_SPACES "{"
+
+    RE_ALIAS = RE_BEGIN "#\\(" RE_SPACES RE_NAME RE_END
+    RE_DOC = RE_BEGIN "#" RE_SPACE RE_ANY RE_END
+    RE_FUNCTION = RE_BEGIN RE_NAME RE_FUNC RE_END
+    RE_MODULE = RE_BEGIN "#." RE_SPACES RE_NAME RE_END
+    RE_SET = RE_BEGIN RE_NAME "=.*" RE_END
+    RE_SHEBANG = RE_BEGIN "#!" RE_SPACES RE_ANY RE_END
+
+    alias = 0
+    reset()
+    module = 0
+}
+
+{
+    # doc
+    if (match($0, RE_SHEBANG, m)) {
+        append("shebang: " m[1])
+    } else if (match($0, RE_DOC, m)) {
+        append(m[1])
+    } else if (match($0, RE_ALIAS, m)) {
+        append("alias: " m[1])
+        if (m[1] == target) {
+            alias = 1
+        }
+    # not doc
+    } else if (match($0, RE_MODULE, m)) {
+        reset()
+        if (m[1] == target) {
+            module = 1
+        }
+    } else if (match($0, RE_SET, m)) {
+        if (m[1] == target) {
+            printf "set: "
+            output(m[1])
+        } else {
+            reset()
+        }
+    } else if (match($0, RE_FUNCTION, m)) {
+        if (alias) {
+            print "alias: " target
+            printf "function: "
+            output(m[1])
+        } else if (m[1] == target) {
+            printf "function: "
+            output(target)
+        } else {
+            reset()
+        }
+    } else {
+        if (module) {
+            printf "module: "
+            output(target)
+        } else {
+            reset()
+        }
+    }
+}
diff --git a/sh/main.awk b/sh/main.awk
deleted file mode 100644
index a64d8cd..0000000
--- a/sh/main.awk
+++ /dev/null
@@ -1,108 +0,0 @@
-function append(line) {
-    if (doc) {
-        doc = doc "\n"
-    }
-    doc = doc line
-}
-
-function output(name) {
-    print name
-    print doc
-    exit
-}
-
-function reset() {
-    doc = ""
-}
-
-BEGIN {
-    RE_ANY = "(.*)"
-    RE_CONST = "([_A-Z][_0-9A-Z]*)"
-    RE_SET = "=.*"
-    RE_SPACE = "[[:space:]]"
-    RE_SPACES = RE_SPACE "*"
-    RE_VAR = "([_a-z][_0-9a-z]*)"
-
-    RE_BEGIN = "^"
-    RE_END = RE_SPACES "$"
-    RE_FUNC = RE_SPACES "\\(" RE_SPACES "\\)" RE_SPACES "{"
-
-    RE_ALIAS = RE_BEGIN "#\\(" RE_SPACES RE_VAR RE_END
-    RE_CONSTANT = RE_BEGIN RE_CONST RE_SET RE_END
-    RE_DOC = RE_BEGIN "#" RE_SPACE RE_ANY RE_END
-    RE_FUNCTION = RE_BEGIN RE_VAR RE_FUNC RE_END
-    RE_MODULE = RE_BEGIN "#." RE_SPACES RE_ANY RE_END
-    RE_SHEBANG = RE_BEGIN "#!" RE_SPACES RE_ANY RE_END
-    RE_VARIABLE = RE_BEGIN RE_VAR RE_SET RE_END
-
-    alias = 0
-    reset()
-    module = 0
-}
-
-{
-    if (action == "alias") {
-        if (match($0, RE_ALIAS, m)) {
-            append(m[1])
-        } else if (match($0, RE_FUNCTION, m)) {
-            n = split(doc, array, "\n")
-            for (i = 1; i<= n; i++) {
-                print array[i] "() { " m[1] " \"${@}\" ; }"
-            }
-            reset()
-        } else {
-            reset()
-        }
-    } else if (action == "doc") {
-        # doc
-        if (match($0, RE_SHEBANG, m)) {
-            append("shebang: " m[1])
-        } else if (match($0, RE_DOC, m)) {
-            append(m[1])
-        } else if (match($0, RE_ALIAS, m)) {
-            append("alias: " m[1])
-            if (m[1] == target) {
-                alias = 1
-            }
-        # set
-        } else if (match($0, RE_CONSTANT, m)) {
-            if (m[1] == target) {
-                printf "constant: "
-                output(m[1])
-            } else {
-                reset()
-            }
-        } else if (match($0, RE_VARIABLE, m)) {
-            if (m[1] == target) {
-                printf "variable: "
-                output(m[1])
-            } else {
-                reset()
-            }
-        # others
-        } else if (match($0, RE_MODULE, m)) {
-            reset()
-            if (m[1] == target) {
-                module = 1
-            }
-        } else if (match($0, RE_FUNCTION, m)) {
-            if (alias) {
-                print "alias: " target
-                printf "function: "
-                output(m[1])
-            } else if (m[1] == target) {
-                printf "function: "
-                output(target)
-            } else {
-                reset()
-            }
-        } else {
-            if (module) {
-                printf "module: "
-                output(target)
-            } else {
-                reset()
-            }
-        }
-    }
-}
diff --git a/sh/main.sh b/sh/main.sh
index f2d7a7a..fb323d8 100755
--- a/sh/main.sh
+++ b/sh/main.sh
@@ -32,7 +32,6 @@ esac
 RWX_ROOT_SYSTEM="/usr/local/lib/${RWX_SELF_NAME}"
 RWX_SELF_USER="${HOME}/${RWX_SELF_NAME}"
 
-RWX_AWK="${RWX_ROOT_SYSTEM}/${RWX_MAIN_NAME%.sh}.awk"
 RWX_MAIN_PATH="${RWX_ROOT_SYSTEM}/${RWX_MAIN_NAME}"
 
 # ╭──────┬──────╮
@@ -65,9 +64,6 @@ rwx_main() {
 # │ main │ cache │
 # ╰──────┴───────╯
 
-# cache of all sourced code modules
-_rwx_code=""
-
 # cache source code of a module
 # inside a global code variable
 rwx_cache() {
@@ -78,7 +74,7 @@ rwx_cache() {
 	local text
 	text="$(cat "${path}")"
 	# all source code
-	_rwx_code="${_rwx_code}\
+	RWX_CODE="${RWX_CODE}\
 #. ${name}
 ${text}
 "
@@ -185,31 +181,17 @@ RWX_REGEX_TARGET_FUNCTION="\
 ${RWX_REGEX_BEGIN}\\(${RWX_REGEX_FUNCTION}\\)${RWX_REGEX_OPEN}"
 
 rwx_parse_code() {
-	# parse aliases
-	local line
-	RWX_ALIASES="$(rwx_parse_aliases)"
-	while IFS= read -r line; do
-		eval "${line}"
-	done <<EOF
-${RWX_ALIASES}
-EOF
 	# parse constants
 	RWX_CONSTANTS="$(rwx_parse_constants)"
 	# parse functions
 	RWX_FUNCTIONS="$(rwx_parse_functions)"
 }
-rwx_parse_aliases() {
-	printf "%s" "${_rwx_code}" |
-		awk \
-			--assign action="alias" \
-			--file "${RWX_AWK}"
-}
 rwx_parse_constants() {
-	printf "%s\n" "${_rwx_code}" |
+	printf "%s\n" "${RWX_CODE}" |
 		sed --silent "s|${RWX_REGEX_TARGET_CONSTANT}|\\1|p"
 }
 rwx_parse_functions() {
-	printf "%s\n" "${_rwx_code}" |
+	printf "%s\n" "${RWX_CODE}" |
 		sed --silent "s|${RWX_REGEX_TARGET_FUNCTION}|\\1|p"
 }
 
@@ -225,12 +207,10 @@ rwx_test() {
     # TODO variables
     set \
         "main" \
-        "alias/git" \
+        "self" \
         \
         "RWX_MAIN_NAME" \
         \
-        "_rwx_code" \
-        \
         "rwx_cache" \
         \
         "gsc"
diff --git a/sh/self.sh b/sh/self.sh
index 901c588..169921a 100644
--- a/sh/self.sh
+++ b/sh/self.sh
@@ -5,11 +5,10 @@
 rwx_doc() {
 	local name="${1}"
 	[ -n "${name}" ] || return
-	printf "%s" "${_rwx_code}" |
+	printf "%s" "${RWX_CODE}" |
 		awk \
-			--assign action="doc" \
-			--assign target="${name}" \
-			--file "${RWX_AWK}"
+			-f "${RWX_ROOT_SYSTEM}/doc.awk" \
+			-v target="${name}"
 }
 
 rwx_doc_old() {
@@ -56,7 +55,7 @@ rwx_doc_old() {
 				;;
 		esac
 	done <<EOF
-${_rwx_code}
+${RWX_CODE}
 EOF
 }