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mal/coffee/node_readline.coffee
Joel Martin c9de2e82ed Tests: add testing Dockerfile. Impl fixes.
- tests/docker/Dockerfile: specifies full docker image containing all
  tools/languages (except matlab).
- tests/docker-build.sh: build above image.
- tests/docker-run.sh: launch above image.
    Example: ./tests/docker-run.sh make test^js^step2
- Various fixes across multiple languages:
    - Unicode fixes for bash and R on Ubuntu Utopic
    - readline history fixes for when ~/.mal-history is not available
      or readable/writable. No fatal errors.
    - fixes to work with perl 5.20 (and still perl 5.18)
2015-03-11 22:22:35 -05:00

40 lines
955 B
CoffeeScript

# IMPORTANT: choose one
RL_LIB = "libreadline" # NOTE: libreadline is GPL
#RL_LIB = "libedit"
HISTORY_FILE = require('path').join(process.env.HOME, '.mal-history')
rlwrap = {} # namespace for this module in web context
ffi = require('ffi')
fs = require('fs')
rllib = ffi.Library(RL_LIB, {
'readline': ['string', ['string']],
'add_history': ['int', ['string']]})
rl_history_loaded = false
exports.readline = rlwrap.readline = (prompt = 'user> ') ->
if !rl_history_loaded
rl_history_loaded = true
lines = []
if fs.existsSync(HISTORY_FILE)
lines = fs.readFileSync(HISTORY_FILE).toString().split("\n");
# Max of 2000 lines
lines = lines[Math.max(lines.length - 2000, 0)..]
rllib.add_history(line) for line in lines when line != ""
line = rllib.readline prompt
if line
rllib.add_history line
try
fs.appendFileSync HISTORY_FILE, line + "\n"
catch exc
true
line
# vim: ts=2:sw=2