available flags

-r, --root <ROOT_DIR>
        root directory, contains source, pattern and build directories
        defaults to current working directory
-s, --source <SOURCE_DIR>
        source file directory, contains directory structure and .meta files for completed site
        defaults to [root_dir]/source
-b, --build <BUILD_DIR>
        build directory, directory where the final site gets built
        defaults to [root_dir]/build
-p, --pattern <PATTERN_DIR>
        pattern directory, contains .meta files that are available for expansion
        defaults to [root_dir]/pattern
-f, --file <FILENAME>
        builds a single file and outputs it to stdout
-l  --parallel
        run metaforge in parallel, allowing much faster build times
        will interleave output in verbose mode
-v, --verbose
        enable extra output. repeated flags give more info
            v   => list source files/directories being created
            vv  => list expansions and substitutions
            vvv => full debug information (function calls, interior parameters)
-q, --quiet
        minimal output
-o, --output <OUTPUT_FILETYPE>
        output filetype, defaults to html
        options:
            - html
            - markdown
            - json
            - latex
            - man
            - txt
            - asciidoc
            - pdf
-i, --input <INPUT_FILETYPE>
        input filetype, defaults to markdown
        options:
            - markdown
            - html
            - json
            - latex
            - org
-h, --help
        print a brief help page
-V, --version
        print version
    --clean
        clean build directory before building site,
        will remove anything currently in build directory
    --new
        create a new skeleton directory in the root dir
    --force
        don't stop building site if a single file fails
    --undefined
        panics and stops building site if any undefined variables are encountered
    --no-pandoc
        don't call pandoc on source files. allows metaforge to run without pandoc installed
    --no-minify
        don't minify resulting html