1 files changed, 17 insertions, 11 deletions
diff --git a/shell_utils.sh b/shell_utils.sh
index 95e0d4e..6d4cc76 100644
--- a/shell_utils.sh
+++ b/shell_utils.sh
@@ -3,15 +3,8 @@
 
 # This file is meant to be sourced in sh.
 
-ENDL="
-"
-
-errcho() {
-    echo "$@" >&2
-}
-
 map_set_instr() {
-    echo "$1__$2='$3'"
+    printf "%s__%s='%s'" "$1" "$2" "$3"
 }
 
 map_set() {
@@ -23,11 +16,11 @@ map_set_export() {
 }
 
 map_get() {
-    eval "echo \"\$$1__$2\""
+    eval "printf %s \"\$$1__$2\""
 }
 
 map_del_instr() {
-    echo "unset $1__$2"
+    printf 'unset %s__%s' "$1" "$2"
 }
 
 map_del() {
@@ -35,5 +28,18 @@ map_del() {
 }
 
 sanitize() {
-    echo "$1" | tr /.- _
+    printf %s "$1" | tr /.- _
+}
+
+escape_regex_special() {
+    printf %s "$1" | sed 's/\([]\.*?{},()[-]\)/\\\1/g'
+}
+
+# Note: We don't actually parse JSON. We extract needed keys with sed regexes
+# which does not work in the general case but is sufficient for now.
+get_json_key() {
+    local KEY_REG="$(escape_regex_special "$1")"
+    printf %s "$2" |
+	sed 's/\(.*"'"$KEY_REG"'"[[:space:]]*:[[:space:]]*"\([^"]*\)"\)\?.*/\2/' |
+	grep . | head -1
 }