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local std = require "specl.std"
local top_srcdir = os.getenv "top_srcdir" or "."
local top_builddir = os.getenv "top_builddir" or "."
package.path = std.package.normalize (
top_builddir .. "/lib/?.lua",
top_srcdir .. "/lib/?.lua",
package.path
)
package.cpath = std.package.normalize (
top_builddir .. "/ext/yaml/.libs/?.so",
top_builddir .. "/ext/yaml/_libs/?.dll",
top_srcdir .. "/ext/yaml/.libs/?.so",
top_srcdir .. "/ext/yaml/_libs/?.dll",
package.cpathi
)
yaml = require "yaml"
BOM = string.char (254, 255) -- UTF-16 Byte Order Mark
-- Hide differences between 5.1 and 5.2
table.unpack = table.unpack or unpack
function dump (e)
print (std.string.prettytostring (e))
end
function github_issue (n)
return "see http://github.com/gvvaughan/lyaml/issues/" .. tostring (n)
end
-- Output a list of event tables to the given emitter.
function emitevents (emitter, list)
for _, v in ipairs (list) do
if type (v) == "string" then
ok, msg = emitter.emit { type = v }
elseif type (v) == "table" then
ok, msg = emitter.emit (v)
else
error "expected table or string argument"
end
if not ok then
error (msg)
elseif ok and msg then
return msg
end
end
end
-- Create a new emitter and send STREAM_START, listed events and STREAM_END.
function emit (list)
local emitter = yaml.emitter ()
emitter.emit {type = "STREAM_START"}
emitevents (emitter, list)
local _, msg = emitter.emit {type = "STREAM_END"}
return msg
end
-- Create a new parser for STR, and consume the first N events.
function consume (n, str)
local e = yaml.parser (str)
for n = 1, n do e () end
return e
end
-- Return a new table with only elements of T that have keys listed
-- in the following arguments.
function filter (t, ...)
local u = {}
for _, k in ipairs {...} do
u[k] = t[k]
end
return u
end
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