WIP: Port to Antlr4

.gitignore

@@ -2,3 +2,8 @@ coverage/
 .nyc_output/
 node_modules/
 test-lib/
+
+java/
+js/**/ElectroGrammar*
+python3/**/ElectroGrammar*
+db/*.json

.prettierrc

@@ -0,0 +1,5 @@
+tabWidth: 2
+semi: true
+singleQuote: true
+bracketSpacing: false
+trailingComma: es5

.travis.yml

@@ -1,14 +1,23 @@
 language: node_js
 node_js:
-  - "6"
   - "8"
   - "node"
 matrix:
   include:
   - node_js: node
     env: TEST_BROWSERS=true
+before_install:
+  - cd travis
+  - wget --no-check-certificate https://www.antlr.org/download/antlr-4.7.1-complete.jar
+  - export CLASSPATH=".:$TRAVIS_BUILD_DIR/travis/antlr-4.7.1-complete.jar:$CLASSPATH"
+  - export PATH=$PATH:$TRAVIS_BUILD_DIR/travis
+  - cd ..
+  - cd js && npm install && cd ..
+  - pip install --user pipenv
+  - pipenv install --dev
 script:
-  - yarn test
-  - yarn demo
+  - make
+  - npm test
+  - npm run fmt
+  - git diff
   - git diff --quiet
-  - if [ "${TEST_BROWSERS}" = "true" ] && [ "${TRAVIS_PULL_REQUEST}" = "false" ]; then yarn test:sauce; fi

Makefile

@@ -0,0 +1,31 @@
+ANTLR=antlr4 -Xexact-output-dir
+GRAMMAR=src/ElectroGrammar.g4
+GRAMMAR_FILES=$(wildcard src/*.g4)
+
+all: js python3
+
+java: $(GRAMMAR) $(GRAMMAR_FILES)
+	$(ANTLR) $< -o java/
+	javac java/*.java -d java/
+
+clean-java:
+	rm -f java/*
+
+
+python3: $(GRAMMAR) $(GRAMMAR_FILES)
+	$(ANTLR) -Dlanguage=Python3 $< -o python3/electro_grammar/
+
+clean-python3:
+	rm -f python3/electro_grammar/ElectroGrammar*
+
+
+js: $(GRAMMAR) $(GRAMMAR_FILES)
+	$(ANTLR) -Dlanguage=JavaScript $< -o js/lib/
+
+clean-js:
+	rm -f js/lib/ElectroGrammar*
+
+
+clean: clean-java clean-python3 clean-js
+
+.PHONY: all clean python3 clean-python3 java clean-java clean js clean-js

Pipfile

@@ -0,0 +1,21 @@
+[[source]]
+
+url = "https://pypi.python.org/simple"
+verify_ssl = true
+name = "pypi"
+
+
+[packages]
+
+"antlr4-python3-runtime" = "*"
+
+
+[dev-packages]
+
+pytest = "*"
+"autopep8" = "*"
+
+
+[requires]
+
+python_version = "3.6"

README.md

@@ -1,3 +1,44 @@
+# Electro Grammar Next
+
+## Goals
+
+- Parse descriptions of common electronic components
+  - Primary:
+    - Resistors
+    - Capacitors
+    - LEDs
+  - Secondary
+    - Inductors
+    - Transistors
+  - Tertiary:
+    - Try and cover the [Common Parts Library][CPL]
+- Be usable from multiple languages:
+  - Primary:
+    - Javascript (Browser & Node)
+    - Python
+    - Go
+    - Java
+  - Optional:
+    - Rust
+    - Haskell
+
+## Output Details
+In as much as possible the output should match that of the existing JS implementation except for:
+
+- Unused i.e. ignored input should be returned. I made a [demo]( http://cloud.monostable.co.uk/egignore/) of an initial implementation but we need to change the lexing strategy to eek out th edge cases
+- The grammar itself should work on "incomplete" descriptions i.e. component specs. E.g. the input `50V` should result in `{voltage_rating: 50}`.
+- `size` should be renamed to `package`
+- `characteristic` should be renamed to `dielectric` or `capacitor_dielectric`
+
+
+## Open Questions
+
+- Is floating point a good unit for capcitance, resistance e.t.c.? I noticed some floating point errors in the Python port when using them for calculation. What's a good alternative?
+- Should we use Antlr or Pest or something else?
+- Should we align the types with Octopart's taxonomy? (e.g. browsing parts from https://octopart.com)
+
+---
+
 # Electro Grammar [![Build Status][BADGE]][BUILD]
 
 [![Sauce Test Status](https://saucelabs.com/browser-matrix/electro-grammar.svg)](https://saucelabs.com/u/electro-grammar)