Initial commit

snippets/read_yaml.sh

@@ -0,0 +1,97 @@
+#!/usr/bin/env bash
+
+# - See: https://gist.github.com/epiloque/8cf512c6d64641bde388
+# - 
+# - Changes from the original (see above url: 
+# - if the yaml file contains carriage returns, the processing will fail. 
+# - In this case, I made a fix on this line (currently line 14)
+# -
+# - fs="$(echo @|tr @ '\034')"
+# -
+# - so it became
+# - fs="$(echo @|tr @ '\034'|tr -d '\015')"
+# -
+# - NOTE!
+# - The indent of the yaml configuration file is "2"
+# -
+# - If you want your indentation to be 4 spaces instead of 2 change this line:
+# -    indent = length($1)/2;
+# - to be this:
+# -    indent = length($1)/4;
+# -
+
+working_dir="$(dirname $(realpath $0))"
+
+# - This file will be created. (see below..)
+# -
+example_yaml_config_file="${working_dir}/files/example_yaml_config.yml"
+
+parse_yaml() {
+    local prefix=$2
+    local s
+    local w
+    local fs
+    s='[[:space:]]*'
+    w='[a-zA-Z0-9_]*'
+    #fs="$(echo @|tr @ '\034')"
+    fs="$(echo @|tr @ '\034'|tr -d '\015')"
+    sed -ne "s|^\($s\)\($w\)$s:$s\"\(.*\)\"$s\$|\1$fs\2$fs\3|p" \
+        -e "s|^\($s\)\($w\)$s[:-]$s\(.*\)$s\$|\1$fs\2$fs\3|p" "$1" |
+    awk -F"$fs" '{
+    indent = length($1)/2;
+    vname[indent] = $2;
+    for (i in vname) {if (i > indent) {delete vname[i]}}
+        if (length($3) > 0) {
+            vn=""; for (i=0; i<indent; i++) {vn=(vn)(vname[i])("_")}
+            printf("%s%s%s=(\"%s\")\n", "'"$prefix"'",vn, $2, $3);
+        }
+    }' | sed 's/_=/+=/g'
+}
+
+cat <<EOF > "$example_yaml_config_file"
+development:
+  adapter: mysql2
+  encoding: utf8
+  database: my_database
+  username: root
+  password:
+  apt:
+    - somepackage
+    - anotherpackage
+EOF
+
+eval $(parse_yaml "$example_yaml_config_file" "optional_prefix_")
+#parse_yaml $example_yaml_config_file "optional_prefix"
+
+echo ""
+echo "-------------------"
+echo "- Read yaml configuration file"
+echo "-------------------"
+
+echo ""
+echo "$example_yaml_config_file:"
+cat $example_yaml_config_file
+
+
+echo -e "\nUsing with optional prefix 'optional_prefix_'"
+echo "============================================="
+echo -e "\t\033[32meval \$(parse_yaml \"$example_yaml_config_file\" "optional_prefix_")\033[m"
+echo ""
+echo -e "\t\${optional_prefix_development_adapter}: ${optional_prefix_development_adapter}"
+echo -e "\t\${optional_prefix_development_apt[@]}:  ${optional_prefix_development_apt[@]}"
+
+
+eval $(parse_yaml "$example_yaml_config_file" )
+#parse_yaml $example_yaml_config_file "optional_prefix"
+
+echo ""
+echo -e "\nUsing without optional prefix "
+echo "=============================="
+echo -e "\t\033[32meval \$(parse_yaml \"$example_yaml_config_file\" )\033[m"
+echo ""
+echo -e "\t\${development_adapter}: ${development_adapter}"
+echo -e "\t\${development_apt[@]}:  ${development_apt[@]}"
+
+echo ""
+rm "$example_yaml_config_file"
+exit 0