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bioroboticslab
robofish
electrofish
vendor
elixir__file_system
Commits
1300de73
Commit
1300de73
authored
8 years ago
by
Thibaut Barrère
Browse files
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Support optional listener args (to get latency 0 support)
parent
d457514a
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README.md
+12
-0
12 additions, 0 deletions
README.md
lib/exfswatch.ex
+3
-2
3 additions, 2 deletions
lib/exfswatch.ex
lib/exfswatch/worker.ex
+8
-7
8 additions, 7 deletions
lib/exfswatch/worker.ex
with
23 additions
and
9 deletions
README.md
+
12
−
0
View file @
1300de73
...
...
@@ -60,6 +60,18 @@ Execute in iex
iex
>
Monitor.start
```
## Tweaking behaviour via listener extra arguments
For each platform, you can pass extra arguments to the underlying listener process via the
`listener_extra_args`
option.
Here is an example to get instant notifications on file changes for Mac OS X:
```
elixir
use
ExFSWatch
,
dirs:
[
"/tmp/fswatch"
],
listener_extra_args:
"--latency=0.0"
```
See the
[
fs source
](
https://github.com/synrc/fs/tree/master/c_src
)
for more details.
## List Events from Backend
```
shell
...
...
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Click to expand it.
lib/exfswatch.ex
+
3
−
2
View file @
1300de73
require
Logger
defmodule
ExFSWatch
do
defmacro
__using__
(
[
dirs:
dirs
]
)
do
defmacro
__using__
(
options
)
do
quote
do
def
__dirs__
,
do
:
unquote
(
dirs
)
def
__dirs__
,
do
:
unquote
(
Keyword
.
fetch!
(
options
,
:dirs
))
def
__listener_extra_args__
,
do
:
unquote
(
Keyword
.
get
(
options
,
:listener_extra_args
,
''
))
def
start
,
do
:
ExFSWatch
.
Supervisor
.
start_child
__MODULE__
end
end
...
...
This diff is collapsed.
Click to expand it.
lib/exfswatch/worker.ex
+
8
−
7
View file @
1300de73
...
...
@@ -9,7 +9,7 @@ defmodule ExFSWatch.Worker do
def
init
(
module
)
do
backend
=
ExFSWatch
.
backend
port
=
start_port
(
backend
,
module
.
__dirs__
)
port
=
start_port
(
backend
,
module
.
__dirs__
,
module
.
__listener_extra_args__
)
{
:ok
,
%
__MODULE__
{
port:
port
,
backend:
backend
,
module:
module
}}
end
...
...
@@ -29,15 +29,16 @@ defmodule ExFSWatch.Worker do
end
defp
start_port
(
:fsevents
,
path
)
do
defp
start_port
(
:fsevents
,
path
,
listener_extra_args
)
do
path
=
path
|>
format_path
args
=
[
listener_extra_args
,
'-F'
|
path
]
Port
.
open
({
:spawn_executable
,
:fsevents
.
find_executable
()},
[
:stream
,
:exit_status
,
{
:line
,
16384
},
{
:args
,
[
'-F'
|
path
]
},
{
:cd
,
System
.
tmp_dir!
}]
[
:stream
,
:exit_status
,
{
:line
,
16384
},
{
:args
,
args
},
{
:cd
,
System
.
tmp_dir!
}]
)
end
defp
start_port
(
:inotifywait
,
path
)
do
defp
start_port
(
:inotifywait
,
path
,
listener_extra_args
)
do
path
=
path
|>
format_path
args
=
[
'-c'
,
'inotifywait $0 $@ & PID=$!; read a; kill $PID'
,
args
=
[
listener_extra_args
,
'-c'
,
'inotifywait $0 $@ & PID=$!; read a; kill $PID'
,
'-m'
,
'-e'
,
'close_write'
,
'-e'
,
'moved_to'
,
'-e'
,
'create'
,
'-e'
,
'delete_self'
,
'-e'
,
'delete'
,
'-r'
|
path
]
...
...
@@ -45,9 +46,9 @@ defmodule ExFSWatch.Worker do
[
:stream
,
:exit_status
,
{
:line
,
16384
},
{
:args
,
args
},
{
:cd
,
System
.
tmp_dir!
}]
)
end
defp
start_port
(
:"inotifywait_win32"
,
path
)
do
defp
start_port
(
:"inotifywait_win32"
,
path
,
listener_extra_args
)
do
path
=
path
|>
format_path
args
=
[
'-m'
,
'-r'
|
path
]
args
=
[
listener_extra_args
,
'-m'
,
'-r'
|
path
]
Port
.
open
({
:spawn_executable
,
:"inotifywait_win32"
.
find_executable
()},
[
:stream
,
:exit_status
,
{
:line
,
16384
},
{
:args
,
args
},
{
:cd
,
System
.
tmp_dir!
}]
)
...
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