File Hierarchy Preview

README.md

Outputs a limited file tree rooted at the current directory which highlights the position of the argument within the tree. Originally intended for FZF like so:

fzf --preview 'ptf.py {}'

Screenshot:

ptf.py

#!/usr/bin/env python
import sys
import os

def get_path(path):
    return os.path.join('.', os.path.normpath(path)).split(os.sep)

def redify(s):
    return '\u001b[31m' + s + '\033[0m'

def render_pathspec(pathspec, red):
    b = []
    for idx, item in enumerate(pathspec):
        if idx == len(pathspec) - 1:
            b.append(redify('├') if red or item == 'r' else '├')
            b.append(redify('──') if red else '──')
        else:
            b.append(redify('│  ') if item == 'r' else '│  ')


    return ''.join(b)

def print_level(name, pathspec, red=False):
    path = render_pathspec(pathspec, red)
    name = redify(name) if red else name
    print('%s%s' % (path, name))

def recur(idx, parts, pathspec):
    cur_path = os.path.join(*parts[:idx+1])
    files = [f for f in os.scandir(cur_path)]
    is_final = idx == len(parts) - 2
    on_path = True

    if not is_final:
        files = [f for f in files if f.is_dir()]


    for fidx, f in enumerate(files):
        red = False
        is_critical_path = f.name == parts[idx+1]

        if is_critical_path:
            red = True
            on_path = False

        new_pathspec = pathspec + ('r' if on_path else 'n')
        print_level(
            f.name,
            new_pathspec,
            red=red
        )

        if not is_final and is_critical_path:
            recur(idx+1, parts, new_pathspec)


if __name__ == '__main__':
    parts = get_path(sys.argv[1])
    print(redify(parts[0]))
    recur(0, parts, '')