53 lines
1.7 KiB
Markdown
53 lines
1.7 KiB
Markdown
# HissCL
|
|
|
|
A [HashiCorp Config Language](https://github.com/hashicorp/hcl) parser for Python
|
|
|
|
## Usage
|
|
|
|
For most simple use-cases, you can use the `load*` convenience functions:
|
|
|
|
`load_file()`:
|
|
```python
|
|
import hisscl
|
|
cfg = hisscl.load_file("config.hcl")
|
|
```
|
|
|
|
`loads()`:
|
|
```python
|
|
import hisscl
|
|
# Use the optional name argument to specify a filename for errors
|
|
cfg = hisscl.loads("x = 2 * 4", name='string.hcl')
|
|
```
|
|
|
|
`load()`:
|
|
```python
|
|
import hisscl
|
|
with open('test.hcl', 'r') as fl:
|
|
# Use the optional name argument to specify a filename for errors
|
|
cfg = hisscl.load(fl, name=fl.name)
|
|
```
|
|
|
|
Each `load*` function has an optional `vars: dict[str, Any]` parameter, whose elements are used as variables in your config file. For example, if you have `x = y + 1`, `y` must be defined in `globals`.
|
|
|
|
For more advanced use-cases, `lexer`, `parser`, `ast`, and `interp` submodules are provided.
|
|
|
|
## Output Format
|
|
|
|
The interpreter outputs a python dictionary containing field values and blocks. Blocks are stored in a list of `interp.Block` values. `interp.Block` is a subclass of `dict` with an extra `labels` attribute that can be used to get a list of block labels. For example:
|
|
|
|
```python
|
|
import hisscl
|
|
cfg = hisscl.loads('x "y" "z" { a = "b" }')
|
|
print(cfg['x'][0].labels) # ['y', 'z']
|
|
print(cfg['x'][0]['a']) # b
|
|
```
|
|
|
|
## Features
|
|
|
|
Currently, this parser supports all HCL features except:
|
|
|
|
- [For Expressions](https://github.com/hashicorp/hcl/blob/main/hclsyntax/spec.md#for-expressions)
|
|
- [Templates](https://github.com/hashicorp/hcl/blob/main/hclsyntax/spec.md#templates)
|
|
- [Function Calls](https://github.com/hashicorp/hcl/blob/main/hclsyntax/spec.md#functions-and-function-calls)
|
|
|
|
Support for these features is planned. |