### Build and Install pathspec from Source

Source: https://github.com/cpburnz/python-pathspec/blob/master/doc/source/readme.md

Build and install pathspec from its source code. This requires the 'build' package and is useful for development or when installing from a local copy.

```bash
python -m build
pip install dist/pathspec-*-py3-none-any.whl
```

--------------------------------

### Install pathspec using pip

Source: https://github.com/cpburnz/python-pathspec/blob/master/doc/source/readme.md

Install the pathspec library from PyPI using pip. This is the recommended method for most users.

```bash
pip install pathspec
```

--------------------------------

### Basic PathSpec Initialization with Gitignore Patterns

Source: https://github.com/cpburnz/python-pathspec/blob/master/README-dist.rst

Initialize a PathSpec object from a list of gitignore-style patterns. This is useful for defining inclusion/exclusion rules for file paths.

```python
from pathspec import PathSpec

# The gitignore-style patterns for files to select, but we're including
# instead of ignoring.
spec_text = """

# This is a comment because the line begins with a hash: "#"

# Include several project directories (and all descendants) relative to
# the current directory. To reference only a directory you must end with a
# slash: "/"
/project-a/
/project-b/
/project-c/

# Patterns can be negated by prefixing with exclamation mark: "!"

# Ignore temporary files beginning or ending with "~" and ending with
# ".swp".
!~*
!*~
!*.swp

# These are python projects so ignore compiled python files from
# testing.
!*.pyc

# Ignore the build directories but only directly under the project
# directories.
!/*/build/

"""

spec = PathSpec.from_lines('gitignore', spec_text.splitlines())
```

--------------------------------

### Create GitIgnoreSpec for Git-like Behavior

Source: https://github.com/cpburnz/python-pathspec/blob/master/README.rst

Instantiate GitIgnoreSpec to more closely replicate Git's behavior, including edge cases like including files from excluded directories.

```python
from pathspec import GitIgnoreSpec
spec = GitIgnoreSpec.from_lines(spec_text.splitlines())
```

--------------------------------

### Compile Gitignore Patterns from Lines

Source: https://github.com/cpburnz/python-pathspec/blob/master/doc/source/readme.md

Compile gitignore-style patterns from a list of strings using the PathSpec class. This is a convenient class method for initializing PathSpec.

```python
>>> spec = PathSpec.from_lines('gitignore', spec_text.splitlines())

```

--------------------------------

### Load Gitignore Patterns from File

Source: https://github.com/cpburnz/python-pathspec/blob/master/doc/source/readme.md

Load gitignore-style patterns directly from a file object using PathSpec.from_lines. Ensure the file is opened in read mode.

```python
>>> with open('patterns.list', 'r') as fh:
>>>     spec = PathSpec.from_lines('gitignore', fh)

```

--------------------------------

### Initialize GitIgnoreSpec

Source: https://github.com/cpburnz/python-pathspec/blob/master/doc/source/readme.md

Initialize GitIgnoreSpec with patterns to more closely replicate Git's behavior, including edge cases not covered by standard gitignore documentation. This spec always uses GitIgnoreSpecPattern internally.

```python
>>> from pathspec import GitIgnoreSpec
>>> spec = GitIgnoreSpec.from_lines(spec_text.splitlines())

```

--------------------------------

### Match Files in Directory Tree

Source: https://github.com/cpburnz/python-pathspec/blob/master/doc/source/readme.md

Perform matching on a whole directory tree using PathSpec.match_tree_files. Returns a set of matched file paths.

```python
>>> matches = set(spec.match_tree_files('path/to/directory'))

```

--------------------------------

### Compile Gitignore Patterns Manually

Source: https://github.com/cpburnz/python-pathspec/blob/master/doc/source/readme.md

Manually compile gitignore-style patterns using GitIgnoreBasicPattern and then initializing PathSpec. This provides more control over pattern compilation.

```python
>>> from pathspec.patterns.gitignore.basic import GitIgnoreBasicPattern
>>> patterns = map(GitIgnoreBasicPattern, spec_text.splitlines())
>>> spec = PathSpec(patterns)

```

--------------------------------

### Load PathSpec from File

Source: https://github.com/cpburnz/python-pathspec/blob/master/README.rst

Load gitignore patterns directly from a file object into a PathSpec. Ensure the file is opened in read mode.

```python
with open('patterns.list', 'r') as fh:
    spec = PathSpec.from_lines('gitignore', fh)
```

--------------------------------

### Define Gitignore Patterns

Source: https://github.com/cpburnz/python-pathspec/blob/master/doc/source/readme.md

Define gitignore-style patterns for file selection. Patterns can include comments, directory inclusions, negations, and specific file exclusions.

```python
>>> from pathspec import PathSpec
>>> # The gitignore-style patterns for files to select, but we're including
>>> # instead of ignoring.
>>> spec_text = """
... # This is a comment because the line begins with a hash: "#"
... # Include several project directories (and all descendants) relative to
... # the current directory. To reference only a directory you must end with a
... # slash: "/"
... /project-a/
... /project-b/
... /project-c/
... # Patterns can be negated by prefixing with exclamation mark: "!"
... # Ignore temporary files beginning or ending with "~" and ending with
... # ".swp".
... !~*
... !*~
... !*.swp
... # These are python projects so ignore compiled python files from
... # testing.
... !*.pyc
... # Ignore the build directories but only directly under the project
... # directories.
... !/*/build/
... """

```

--------------------------------

### Match Specific File Paths

Source: https://github.com/cpburnz/python-pathspec/blob/master/doc/source/readme.md

Perform matching on a specific set of file paths using PathSpec.match_files. Returns a set of matched file paths.

```python
>>> matches = set(spec.match_files(file_paths))

```

--------------------------------

### Match Files in Directory

Source: https://github.com/cpburnz/python-pathspec/blob/master/README.rst

Use `match_tree_files` to find files that match or do not match a given pathspec within a directory. This is useful for selectively including or excluding files.

```python
>>> keep_files = set(spec.match_tree_files('path/to/directory', negate=True))
>>> ignore_files = set(spec.match_tree_files('path/to/directory'))
```

--------------------------------

### Match a Set of File Paths

Source: https://github.com/cpburnz/python-pathspec/blob/master/README.rst

Perform matching on a predefined list or set of file paths using a PathSpec object.

```python
matches = set(spec.match_files(file_paths))
```

--------------------------------

### Match an Individual File

Source: https://github.com/cpburnz/python-pathspec/blob/master/README.rst

Check if a single, specific file path matches the patterns defined in a PathSpec object.

```python
is_matched = spec.match_file(file_path)
```

--------------------------------

### Flipping Results with negate=True

Source: https://github.com/cpburnz/python-pathspec/blob/master/README-dist.rst

Use the 'negate=True' option with GitIgnoreSpec to invert the matching results. This is useful for scenarios where you want to include files that would normally be excluded, such as ignoring *.gitignore files.

```python
from pathspec import GitIgnoreSpec

spec = GitIgnoreSpec.from_lines([...])

# To find files to keep, and exclude files like *.gitignore, set negate=True
# to flip the results.
```

--------------------------------

### Check Individual File Match

Source: https://github.com/cpburnz/python-pathspec/blob/master/doc/source/readme.md

Check if an individual file matches the defined patterns using PathSpec.match_file. Returns a boolean.

```python
>>> is_matched = spec.match_file(file_path)

```

--------------------------------

### Match Files in a Directory Tree

Source: https://github.com/cpburnz/python-pathspec/blob/master/README.rst

Perform matching on all files within a specified directory tree using a PathSpec object.

```python
matches = set(spec.match_tree_files('path/to/directory'))
```

--------------------------------

### Ignoring Files with GitIgnoreSpec

Source: https://github.com/cpburnz/python-pathspec/blob/master/doc/source/readme.md

Use GitIgnoreSpec with negate=True to find files to keep, excluding patterns like .gitignore. This is useful for managing file inclusion/exclusion based on gitignore-style patterns.

```python
from pathspec import GitIgnoreSpec
spec = GitIgnoreSpec.from_lines([...])
keep_files = set(spec.match_tree_files('path/to/directory', negate=True))
ignore_files = set(spec.match_tree_files('path/to/directory'))
```

--------------------------------

### Invert PathSpec Results

Source: https://github.com/cpburnz/python-pathspec/blob/master/README.rst

Flip the results of a PathSpec or GitIgnoreSpec to positively match files instead of excluding them. Use negate=True when initializing or when calling methods.

```python
from pathspec import GitIgnoreSpec
spec = GitIgnoreSpec.from_lines([...])
```

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