bash

I just spent the evening trying to parse a YAML Front Matter from bash. It requires to have yq installed. Here is the code: function main() { filepath=$1 project_name=$(get_project_name_from_path ${filepath}) echo -e "${project_name}" } function get_project_name_from_file() { file_path=$1 yaml_front_matter=$(get_yaml_front_matter $file_path) if [[ $? == 0 ]]; then # Case YAML Front Matter exists fdebug "yaml_front_matter:\n\n ${yaml_front_matter}" yaml_project_name=$( get_project_name_from_yaml "${yaml_front_matter}" ) if [[ $? == 0 ]]; then # Case YAML Front Matter defines a project name fdebug "YAML Front Matter defines a project name" project_name=${yaml_project_name} return_value=0 else # Case YAML Front Matter DOES NOT defines a project name fdebug "YAML Front Matter DOES NOT defines a project name" project_name=$( get_end_of_path ${project_path} ) # Return folder name as project name return_value=2 fi fdebug "Returned \$yaml_project_name : $yaml_project_name" else # Case YAML Front Matter DOES NOT exists fdebug "YAML Front Matter DOES NOT exists" project_name=$( get_end_of_path ${project_path} ) # Return folder name as project name return_value=1 fi echo ${project_name} return ${return_value} } function get_yaml_front_matter() { file_path=$1 file_start=$( \head -n 1 $file_path ) if [[ $file_start == "---" ]]; then # Case there might be a YAML Front Matter while IFS='' read -r line; do # IFS='' to keep whitespaces # Check end of YAML Front Matter ( echo $line | grep -- '---' &>/dev/null ) && yaml_front_matter_validated="true" && break yaml_front_matter="${yaml_front_matter}${line}\n" done < <( \tail -n +2 $file_path ) # Skip first line containing --- if [[ $yaml_front_matter_validated == "true" ]]; then # Case there is a YAML Front Matter echo "${yaml_front_matter}" else # Case there is NO VALID a YAML Front Matter return 1 fi else # Case there is NO YAML Front Matter return 1 fi } function get_project_name_from_yaml() { yaml_front_matter=${1} yaml_project_name=$(echo -e $yaml_front_matter | yq -r ....