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added polling watch mode for systems without inotify

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leaf corcoran 2011-10-09 01:59:50 -07:00
parent d98dabd7bf
commit 66105353d5
1 changed files with 95 additions and 35 deletions
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130
moonc
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@ -13,6 +13,8 @@ local opts, ind = alt_getopt.get_opts(arg, "vhwt:pTb", {
print = "p", tree = "T", version = "v", help = "h"
})
local polling_rate = 1.0
local help = [[Usage: %s [options] files...
-h Print this message
@ -231,7 +233,21 @@ end
files = remove_dups(files)
if opts.w then
function get_sleep_func()
local sleep
if not pcall(function()
require "socket"
sleep = socket.sleep
end) then
sleep = moonscript._sleep
end
return sleep
end
-- returns an iterator that returns files that have been updated
function create_watcher(files)
local msg = "Starting watch loop, Ctrl-C to exit"
local inotify
if not pcall(function()
inotify = require "inotify"
@ -239,47 +255,91 @@ if opts.w then
print_help("inotify not installed")
end
local dirs = {}
for _, fname in ipairs(files) do
table.insert(dirs, get_dir(fname))
end
dirs = remove_dups(dirs)
print(("Starting watch loop, Ctrl-C to exit [%d dirs]"):format(#dirs))
local wd_table = {}
local handle = inotify:init()
for _, dir in ipairs(dirs) do
local wd = handle:addwatch(dir, inotify.IN_MODIFY)
wd_table[wd] = dir
end
while true do
local success, events = pcall(handle.read, handle)
if not success then
print"\nQuitting..."
break
if false and inotify then
local dirs = {}
for _, fname in ipairs(files) do
table.insert(dirs, get_dir(fname))
end
dirs = remove_dups(dirs)
if events then
for _, ev in ipairs(events) do
local fname = wd_table[ev.wd]..ev.name
if fname:match("%.moon$") then
local target = target_dir..convert_path(fname)
local success, err = compile_and_write(fname, target)
return coroutine.wrap(function()
print(("%s with inotify [%d dirs]"):format(msg, #dirs))
if not success then
print()
print("Error: "..fname)
print(err)
print()
else
msg("Built", fname)
local wd_table = {}
local handle = inotify:init()
for _, dir in ipairs(dirs) do
local wd = handle:addwatch(dir, inotify.IN_MODIFY)
wd_table[wd] = dir
end
while true do
local success, events = pcall(handle.read, handle)
if not success then
print "break in handler"
break
end
if events then
for _, ev in ipairs(events) do
local fname = wd_table[ev.wd]..ev.name
if fname:match("%.moon$") then
coroutine.yield(fname)
end
end
else
break
end
end
else break end
end)
else
-- poll the filesystem instead
local sleep = get_sleep_func()
return coroutine.wrap(function()
print(("%s with polling [%d files]"):format(msg, #files))
local mod_time = {}
while true do
for _, file in ipairs(files) do
local time = lfs.attributes(file, "modification")
if not mod_time[file] then
mod_time[file] = time
else
if time ~= mod_time[file] then
if time > mod_time[file] then
coroutine.yield(file)
mod_time[file] = time
end
end
end
end
sleep(polling_rate)
end
end)
end
end
if opts.w then
local watcher = create_watcher(files)
-- catches interrupt error for ctl-c
local protected = function()
local status, file = pcall(watcher)
if status then return file end
end
for fname in protected do
local target = target_dir..convert_path(fname)
local success, err = compile_and_write(fname, target)
if not success then
print()
print("Error:", fname)
print(err)
print()
else
msg("Built:", fname, "->", target)
end
end
print "\nQuitting..."
else
for _, fname in ipairs(files) do
local success, err = compile_and_write(fname, target_dir..convert_path(fname))