increase portability by getting rid of declare

lib/utils/functions.sh

@@ -1,34 +1,6 @@
 #!/bin/sh
 
+# this is bad, but `declare -f -F` is not portable
 is_function () {
-  declare -f -F $1 > /dev/null; return $?
-}
-
-# http://stackoverflow.com/a/1369211/183097
-copy_function () {
-  is_function $1 || return 1
-  eval "$(echo "${2}()"; declare -f ${1} | tail -n +2)"
-}
-
-# if `type declare | grep -q 'shell builtin$'`; then
-#   is_function () {
-#     declare -f -F $1 > /dev/null; return $?
-#   }
-
-#   # http://stackoverflow.com/a/1369211/183097
-#   copy_function () {
-#     is_function $1 || return 1
-#     eval "$(echo "${2}()"; declare -f ${1} | tail -n +2)"
-#   }
-
-# # `declare` is non-posix, provide alternative
-# else
-#   is_function () {
-#     type $1 | grep -q 'shell function$'
-#   }
-
-#   copy_function () {
-#     is_function $1 || return 1
-#     echo "${2}() { ${1} }"
-#   }
-# fi
+  type $1 2> /dev/null | grep -q 'function$'
+}

lib/utils/loader.sh

@@ -0,0 +1,26 @@
+#!/bin/sh
+
+load_metric_with_prefix () {
+  local prefix=$1
+  local file=$2
+
+  local content=$(sed \
+          -e "s/^\s*\(init[ ]*()[ ]*{\)/${prefix}\1/" \
+          -e "s/^\s*\(collect[ ]*()[ ]*{\)/${prefix}\1/" \
+          -e "s/^\s*\(terminate[ ]*()[ ]*{\)/${prefix}\1/" \
+          -e "s/^\s*\(docs[ ]*()[ ]*{\)/${prefix}\1/" $file)
+
+  eval "$content"
+}
+
+load_reporter_with_prefix () {
+  local prefix=$1
+  local file=$2
+  local content=$(sed \
+          -e "s/^\s*\(init[ ]*()[ ]*{\)/${prefix}\1/" \
+          -e "s/^\s*\(report[ ]*()[ ]*{\)/${prefix}\1/" \
+          -e "s/^\s*\(terminate[ ]*()[ ]*{\)/${prefix}\1/" \
+          -e "s/^\s*\(docs[ ]*()[ ]*{\)/${prefix}\1/" $file)
+
+  eval "$content"
+}