Package: yamldirs
Create directories and files (including content) from yaml spec.This module was created to rapidly create, and clean up, directory trees
for testing purposes.Installation:pip install yamldirsNew in version 1.1.7:a (very basic)yamldirscommand has been added:yamldirs dirnameprints the yaml for the directory tree rooted atdirname(the formatting, while
technically correct, probably needs some human editing).To extract the directory tree defined byfile.yaml:yamldirs file.yamlthe extension needs to be exactly.yaml.UsageThe YAML record syntax is:fieldname: content
fieldname2: |
    multi
    line
    content
nested:
    record: contentyamldirsinterprets a (possibly nested) yaml record structure and creates
on-disk file structures that mirrors the yaml structure.The most common usage scenario for testing will typically look like this:from yamldirs import create_files

def test_relative_imports():
    files = """
        foodir:
            - __init__.py
            - a.py: |
                from . import b
            - b.py: |
                from . import c
            - c.py
    """
    with create_files(files) as workdir:
        # workdir is now created inside the os's temp folder, containing
        # 4 files, of which two are empty and two contain import
        # statements. Current directory is workdir.

    # `workdir` is automatically removed after the with statement.If you don’t want the workdir to disappear (typically the case if a test fails
and you want to inspect the directory tree) you’ll need to change the
with-statement to:with create_files(files, cleanup=False) as workdir:
    ...yamldirscan of course be used outside of testing scenarios too:from yamldirs import Filemaker

Filemaker('path/to/parent/directory', """
    foo.txt: |
        hello
    bar.txt: |
        world
""")SyntaxIf you’re new to yaml and receive ayaml.parsererror you don’t understand,
it might be useful to run your yaml through an online validater
(e.g.https://codebeautify.org/yaml-validator).The yaml syntax to create a single file:foo.txtFiles with contents uses the YAML record (associative array) syntax with the
field name (left of colon+space) is the file name, and the value is the file
contents. Eg. a single file containing the texthello world:foo.txt: hello worldfor more text it is better to use a continuation line (|to keep line
breaks and>to convert single newlines to spaces):foo.txt: |
    Lorem ipsum dolor sit amet, vis no altera doctus sanctus,
    oratio euismod suscipiantur ne vix, no duo inimicus
    adversarium. Et amet errem vis. Aeterno accusamus sed ei,
    id eos inermis epicurei. Quo enim sonet iudico ea, usu
    et possit euismod.To create empty files you can do:foo.txt: ""
bar.txt: ""but as a convenience you can also use yaml list syntax:- foo.txt
- bar.txtFor even more convenience, files with content can be created using lists
of records with only one field each:- foo.txt: |
    hello
- bar.txt: |
    worldNoteThis is equivalent to this json:[{"foo.txt":"hello"},{"bar.txt":"world"}]This is especially useful when you have a mix of empty and non-empty filess:mymodule:
    - __init__.py
    - mymodule.py: |
        print "hello world"directory with two (empty) files (YAML record field with list value):foo:
    - bar
    - bazan empty directory must use YAML’s inline list syntax:foo: []nested directories with files:foo:
    - a.txt: |
        contents of the file named a.txt
    - bar:
        - b.txt: |
            contents of the file named b.txtIt’s worth noting that you cannot mix record and list syntax in the same
nesting level:# wrong
dir1:               # top-level record
    - file1         # first level is a list..
    - file2         # .. file1 and file2 are here empty files
    dir2:           # <== ERROR: You cannot define a mapping item when in a sequence
        - file3
        - file4the solution is to makedir2a list item:dir1:
    - file1
    - file2
    - dir2:    # <== Correct.
        - file3
        - file4the corresponding json is:>>> print json.dumps(yaml.load("""
... dir1:
...   - file1
...   - file2
...   - dir2:
...      - file3
...      - file4
... """), indent=4)
{
    "dir1": [
        "file1",
        "file2",
        {
            "dir2": [
                "file3",
                "file4"
            ]
        }
    ]
}or make the first level (b, c, dbelow) record fields:a:
    b: b
    c: c
    d:
        e: ecorresponding json:>>> print json.dumps(yaml.load("""
... a:
...   b: b
...   c: c
...   d:
...     e: e
... """), indent=4)
{
    "a": {
        "c": "c",
        "b": "b",
        "d": {
            "e": "e"
        }
    }
}Note(Json)
YAML is a superset of json, so you can also use json syntax if that is more
convenient.Extending yamldirsTo extendyamldirsto work with other storage backends, you’ll need to
inherit fromyamldirs.filemaker.FilemakerBaseand override the following
methods:class Filemaker(FilemakerBase):
    def goto_directory(self, dirname):
        os.chdir(dirname)

    def makedir(self, dirname, content):
        cwd = os.getcwd()
        os.mkdir(dirname)
        os.chdir(dirname)
        self.make_list(content)
        os.chdir(cwd)

    def make_file(self, filename, content):
        with open(filename, 'w') as fp:
            fp.write(content)

    def make_empty_file(self, fname):
        open(fname, 'w').close()