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Add fs_inotify backend option for selecting events. #77

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Add fs_inotify backend option for selecting events. #77

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28 changes: 26 additions & 2 deletions lib/file_system/backends/fs_inotify.ex
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Original file line number Diff line number Diff line change
Expand Up @@ -79,8 +79,7 @@ defmodule FileSystem.Backends.FSInotify do
{dirs, rest} ->
format = ["%w", "%e", "%f"] |> Enum.join(@sep_char) |> to_charlist
args = [
'-e', 'modify', '-e', 'close_write', '-e', 'moved_to', '-e', 'moved_from',
'-e', 'create', '-e', 'delete', '-e', 'attrib', '--format', format, '--quiet', '-m', '-r'
'--format', format, '--quiet', '-m', '-r'
| dirs |> Enum.map(&Path.absname/1) |> Enum.map(&to_charlist/1)
]
parse_options(rest, args)
Expand All @@ -98,6 +97,30 @@ defmodule FileSystem.Backends.FSInotify do
Logger.error "unknown value `#{inspect value}` for recursive, ignore"
parse_options(t, result)
end
defp parse_options([{:events, [:modified | et]} | t], result) do
parse_options([{:events, et} | t], ['-e', 'modify', '-e', 'close_write'] ++ result)
end
defp parse_options([{:events, [:moved_to | et]} | t], result) do
parse_options([{:events, et} | t], ['-e', 'moved_to'] ++ result)
end
defp parse_options([{:events, [:moved_from | et]} | t], result) do
parse_options([{:events, et} | t], ['-e', 'moved_from'] ++ result)
end
defp parse_options([{:events, [:created | et]} | t], result) do
parse_options([{:events, et} | t], ['-e', 'create'] ++ result)
end
defp parse_options([{:events, [:deleted | et]} | t], result) do
parse_options([{:events, et} | t], ['-e', 'delete'] ++ result)
end
defp parse_options([{:events, [:attribute | et]} | t], result) do
parse_options([{:events, et} | t], ['-e', 'attrib'] ++ result)
end
defp parse_options([{:events, [:closed | et]} | t], result) do
parse_options([{:events, et} | t], ['-e', 'close'] ++ result)
end
defp parse_options([{:events, []} | t], result) do
parse_options(t, result)
end
defp parse_options([h | t], result) do
Logger.error "unknown option `#{inspect h}`, ignore"
parse_options(t, result)
Expand All @@ -109,6 +132,7 @@ defmodule FileSystem.Backends.FSInotify do

def init(args) do
{worker_pid, rest} = Keyword.pop(args, :worker_pid)
rest = Keyword.merge([events: [:modified, :moved_to, :moved_from, :created, :deleted, :attribute]], rest)

case parse_options(rest) do
{:ok, port_args} ->
Expand Down