Ecosyste.ms: Awesome
An open API service indexing awesome lists of open source software.
https://github.com/hildjj/node-abnf
Augmented Backus-Naur Form (ABNF) parsing for node.js. See RFC 5234.
https://github.com/hildjj/node-abnf
Last synced: 20 days ago
JSON representation
Augmented Backus-Naur Form (ABNF) parsing for node.js. See RFC 5234.
- Host: GitHub
- URL: https://github.com/hildjj/node-abnf
- Owner: hildjj
- License: apache-2.0
- Created: 2012-05-29T08:00:40.000Z (over 12 years ago)
- Default Branch: main
- Last Pushed: 2024-08-29T16:29:24.000Z (3 months ago)
- Last Synced: 2024-10-18T20:35:56.577Z (28 days ago)
- Language: JavaScript
- Homepage:
- Size: 332 KB
- Stars: 25
- Watchers: 4
- Forks: 5
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# Parse ABNF grammars
For more information on the flavor of ABNF
([Augmented Backus-Naur Form](https://en.wikipedia.org/wiki/Augmented_Backus%E2%80%93Naur_form)) supported by this project,
see [RFC 5234](http://tools.ietf.org/html/rfc5234)
and [RFC 7405](https://www.rfc-editor.org/rfc/rfc7405).
## Installation:
npm install -g abnf
## Example:
import { parseFile } from "abnf";
const rules = await parseFile("myfile.abnf");
## CLI
There are a few binaries included:
### abnf_check
Check the given ABNF file for correctness.
```
Usage: abnf_check [options] [abnfFile...]
Check ABNF files for syntax, unused rules, and undefined rules
Options:
-h, --help display help for command
```
### abnf_ast
Output the generated abstract syntax tree for the ABNF input. This output is
mostly diagnostic in nature, not really meant to be parsed.
```
Usage: abnf_ast [options] [abnfFile...]
Output all of the rules derived from a given ABNF file
Options:
-l,--location don't remove location information
-h, --help display help for command
```
### abnf_gen
Generate a [Peggy](https://peggyjs.org/) grammar from the ABNF. The idea
is that you could then annotate this grammar with actions in order to create
a useful parser.
```
Usage: abnf_gen [options] [abnfFile...]
Create a Peggy grammar from an ABNF file
Arguments:
abnfFile ABNF files to turn into peggy grammars.
Options:
-s, --startRule Start rule for peggy grammar. Defaults to first
rule in ABNF grammar.
--stubs Generate stubs for rules that do not exist,
rather than failing.
-o, --output Output peggy grammar file name. Derived from
input file name if not specified. (default:
"stdin.peggy")
-u, --unused Output rules that are not reachable from the
start rule
-c, --core Include core rules from RFC 5234, Appendix B.
-h, --help display help for command
```
### abnf_test
Using an ABNF, test inputs to see if they match. Returns the Peggy parse
tree, which will likely be somewhat confusing until you're familiar with Peggy.
```
Usage: abnf_test [options] [abnfFile...]
Send test inputs to an ABNF grammar
Arguments:
abnfFile The ABNF to test.
Options:
-o, --output Output grammar source, if not testing. Generated
from peggyFile name if needed.
-s, --startRule When testing, use this as the start rule.
-t, --test String to check against grammar.
-T, --testFile File contents to check against grammar.
--trace Turn on peggy tracing
-h, --help display help for command
```
## Suggested Workflow
```sh
$ cat << EOF > foo.abnf
f = "abc"
EOF
$ abnf_gen foo.abnf
$ cat foo.peggy
f
= "abc"i
$ abnf_test foo.abnf -t abc
'abc'
$ abnf_test foo.peggy -t ab
Error: Expected "abc" but "a" found.
--> command line:1:1
|
1 | ab
| ^
```
## API
### .parseFile(input)
Parse the file with the given name, returning a promise for a Rules object.
### .parseString(input, grammarSource = "unknown")
Parse the given string and return a Rules object. The `grammarSource` is
the name of the file that the input came from.
### .parseStream(stream, grammarSource = "stdin")
Read the stream, parse it, and return a promise for a Rules object. The
`grammarSource` is the name of the file that the input came from.
## Returned Rules object shape
### Rules.first
The name of the first rule in the input grammar.
### Rules.defs
A hash of Rule objects indexed by uppercase rulename.
### Rules.refs
An array of RuleRef objects.
### Rule.name
The name of the rule
### Rule.loc
The Peggy location in the input file where the rule name was defined
### Rule.def
The definition of the rule. More information forthcoming.
### RuleRef.name
The name of the rule that was referenced
### RuleRef.loc
The Peggy location in the input file where the rule name was referenced.
---
[](https://github.com/hildjj/node-abnf/actions/workflows/node.js.yml)
[](https://codecov.io/gh/hildjj/node-abnf)