file.watch() does not work

[brenc]

Description

This code does not work:

file.watch(
  "/tmp/testfile",
  {print("testfile changed")},
)

I don't think this worked in 2.2 either (or earlier).

Steps to reproduce

Run the provided code then echo TEST >> /tmp/testfile.

Expected behavior

For the provided code to produce "testfile changed" when it's changed.

Liquidsoap version

2.3.0

Liquidsoap build config

* Liquidsoap version  : 2.3.0

 * Compilation options
   - Release build       : true
   - Git SHA             : (none)
   - OCaml version       : 4.14.2
   - OS type             : Unix
   - Libs versions       : alsa=0.3.0 angstrom=0.16.1 ao=0.2.4 asetmap=0.8.1 asn1-combinators=0.3.2 astring=0.8.5 base=v0.16.3 base.base_internalhash_types=v0.16.3 base.caml=v0.16.3 base.shadow_stdlib=v0.16.3 base64=3.5.1 bigarray=[distributed with Ocaml] bigarray-compat=1.1.0 bigstringaf=0.10.0 bjack=0.1.6 bos=0.2.1 bytes=[distributed with OCaml 4.02 or above] ca-certs=v1.0.0 camlp-streams camomile.lib=2.0 cohttp=5.3.1 cohttp-lwt=5.3.0 cohttp-lwt-unix=5.3.0 conduit=7.1.0 conduit-lwt=7.1.0 conduit-lwt-unix=7.1.0 cry=1.0.3 cstruct=6.2.0 ctypes=0.23.0 ctypes-foreign=0.23.0 ctypes.stubs=0.23.0 curl=0.9.2 digestif.c=1.2.0 domain-name=0.4.0 domain_shims dssi=0.1.5 dtools=0.4.5 dune-build-info=3.16.1 dune-private-libs.dune-section=3.16.1 dune-site=3.16.1 dune-site.private=3.16.1 duppy=0.9.4 eqaf=0.10 faad=0.5.2 fdkaac=0.3.3 ffmpeg-av=1.2.1 ffmpeg-avcodec=1.2.1 ffmpeg-avdevice=1.2.1 ffmpeg-avfilter=1.2.1 ffmpeg-avutil=1.2.1 ffmpeg-swresample=1.2.1 ffmpeg-swscale=1.2.1 fileutils=0.6.4 flac=0.5.1 flac.decoder=0.5.1 flac.ogg=0.5.1 fmt=0.9.0 fpath=0.7.3 frei0r=0.1.2 gd=1.1 gen=1.1 gmap=0.3.0 inotify=v2.6 integers ipaddr=5.6.0 ipaddr-sexp=5.6.0 ipaddr.unix=5.6.0 irc-client irc-client-unix kdf.hkdf=1.0.0 kdf.pbkdf=1.0.0 ladspa=0.2.2 lame=0.3.7 lastfm=0.3.4 lilv=0.2.0 liquidsoap-lang=2.3.0 liquidsoap-lang.console=2.3.0 liquidsoap_alsa=v2.3.0-2-g658a641 liquidsoap_ao=v2.3.0-2-g658a641 liquidsoap_bjack=v2.3.0-2-g658a641 liquidsoap_builtins=v2.3.0-2-g658a641 liquidsoap_core=v2.3.0-2-g658a641 liquidsoap_dssi=v2.3.0-2-g658a641 liquidsoap_faad=v2.3.0-2-g658a641 liquidsoap_fdkaac=v2.3.0-2-g658a641 liquidsoap_ffmpeg=v2.3.0-2-g658a641 liquidsoap_flac=v2.3.0-2-g658a641 liquidsoap_frei0r=v2.3.0-2-g658a641 liquidsoap_gd=v2.3.0-2-g658a641 liquidsoap_irc=v2.3.0-2-g658a641 liquidsoap_ladspa=v2.3.0-2-g658a641 liquidsoap_lame=v2.3.0-2-g658a641 liquidsoap_lastfm=v2.3.0-2-g658a641 liquidsoap_lilv=v2.3.0-2-g658a641 liquidsoap_lo=v2.3.0-2-g658a641 liquidsoap_mad=v2.3.0-2-g658a641 liquidsoap_ndi=v2.3.0-2-g658a641 liquidsoap_ogg=v2.3.0-2-g658a641 liquidsoap_ogg_flac=v2.3.0-2-g658a641 liquidsoap_optionals=v2.3.0-2-g658a641 liquidsoap_opus=v2.3.0-2-g658a641 liquidsoap_osc=v2.3.0-2-g658a641 liquidsoap_oss=v2.3.0-2-g658a641 liquidsoap_portaudio=v2.3.0-2-g658a641 liquidsoap_posix_time=v2.3.0-2-g658a641 liquidsoap_prometheus=v2.3.0-2-g658a641 liquidsoap_pulseaudio=v2.3.0-2-g658a641 liquidsoap_runtime=v2.3.0-2-g658a641 liquidsoap_samplerate=v2.3.0-2-g658a641 liquidsoap_sdl=v2.3.0-2-g658a641 liquidsoap_sdl_log_level=v2.3.0-2-g658a641 liquidsoap_shine=v2.3.0-2-g658a641 liquidsoap_soundtouch=v2.3.0-2-g658a641 liquidsoap_speex=v2.3.0-2-g658a641 liquidsoap_sqlite=v2.3.0-2-g658a641 liquidsoap_srt=v2.3.0-2-g658a641 liquidsoap_ssl=v2.3.0-2-g658a641 liquidsoap_stereotool=v2.3.0-2-g658a641 liquidsoap_theora=v2.3.0-2-g658a641 liquidsoap_tls=v2.3.0-2-g658a641 liquidsoap_vorbis=v2.3.0-2-g658a641 liquidsoap_xmlplaylist=v2.3.0-2-g658a641 liquidsoap_yaml=v2.3.0-2-g658a641 lo=0.2.0 logs=0.7.0 logs.fmt=0.7.0 logs.lwt=0.7.0 lwt lwt.unix macaddr=5.6.0 mad=0.5.3 magic-mime=1.3.1 mem_usage=0.1.1 memtrace=0.2.3 menhirLib=20240715 metadata=0.3.0 mirage-crypto=1.1.0 mirage-crypto-ec=1.1.0 mirage-crypto-pk=1.1.0 mirage-crypto-rng=1.1.0 mirage-crypto-rng.unix=1.1.0 mm=0.8.6 mm.audio=0.8.6 mm.base=0.8.6 mm.image=0.8.6 mm.midi=0.8.6 mm.video=0.8.6 ndi=v2.3.0-2-g658a641 ocplib-endian ocplib-endian.bigstring ogg=0.7.4 ogg.decoder=0.7.4 ohex opus=0.2.3 opus.decoder=0.2.3 osc osc-unix portaudio=0.2.3 posix-base=5a7f328 posix-socket=5a7f328 posix-socket.constants=5a7f328 posix-socket.stubs=5a7f328 posix-socket.types=5a7f328 posix-time2=5a7f328 posix-time2.constants=5a7f328 posix-time2.stubs=5a7f328 posix-time2.types=5a7f328 posix-types=5a7f328 posix-types.constants=5a7f328 ppx_compare.runtime-lib=v0.16.0 ppx_hash.runtime-lib=v0.16.0 ppx_sexp_conv.runtime-lib=v0.16.0 prometheus=1.2 prometheus-app=1.2 ptime=1.2.0 ptime.clock=1.2.0 ptime.clock.os=1.2.0 pulseaudio=0.1.6 re=1.12.0 result=1.5 rresult=0.7.0 samplerate=0.1.7 saturn_lockfree=0.4.1 sedlex=3.3 seq=[distributed with OCaml 4.07 or above] sexplib0=v0.16.0 shine=0.2.3 soundtouch=0.1.9 speex=0.4.2 speex.decoder=0.4.2 sqlite3=5.2.0 srt=0.3.1 srt.constants=0.3.1 srt.stubs=0.3.1 srt.stubs.locked=0.3.1 srt.types=0.3.1 ssl=0.7.0 stdlib-shims=0.3.0 stereotool=v2.3.0-2-g658a641 str=[distributed with Ocaml] stringext=1.6.0 theora=0.4.1 theora.decoder=0.4.1 threads=[distributed with Ocaml] threads.posix=[internal] tls=1.0.2 tsdl=v1.1.0 tsdl-image=0.5 tsdl-ttf=0.6 unix=[distributed with Ocaml] unix-errno=52c6ecb unix-errno.errno_bindings=52c6ecb unix-errno.errno_types=52c6ecb unix-errno.errno_types_detected=52c6ecb unix-errno.unix=52c6ecb uri=4.4.0 uri-sexp=4.4.0 uri.services=4.4.0 vorbis=0.8.1 vorbis.decoder=0.8.1 x509=1.0.5 xmlm=1.4.0 xmlplaylist=0.1.5 yaml=3.2.0 yaml.bindings=3.2.0 yaml.bindings.types=3.2.0 yaml.c=3.2.0 yaml.ffi=3.2.0 yaml.types=3.2.0 zarith=1.14
   - architecture        : amd64
   - host                : x86_64-pc-linux-gnu
   - target              : x86_64-pc-linux-gnu
   - system              : linux
   - ocamlopt_cflags     : -O2 -fno-strict-aliasing -fwrapv -pthread -fPIC
   - native_c_compiler   : gcc -O2 -fno-strict-aliasing -fwrapv -pthread -fPIC -D_FILE_OFFSET_BITS=64
   - native_c_libraries  : -lm

 * Configured paths
   - mode              : posix
   - standard library  : /usr/share/liquidsoap/libs
   - scripted binaries : /usr/share/liquidsoap/bin
   - rundir            : /var/run/liquidsoap
   - logdir            : /var/log/liquidsoap
   - user cache        : $HOME/.cache/liquidsoap (override with $LIQ_CACHE_USER_DIR)
   - system cache      : /var/cache/liquidsoap (override with $LIQ_CACHE_SYSTEM_DIR)
   - camomile files    : /usr/share/liquidsoap/camomile

 * Supported input formats
   - MP3               : yes
   - AAC               : yes
   - Ffmpeg            : yes
   - Flac (native)     : yes
   - Flac (ogg)        : yes
   - Opus              : yes
   - Speex             : yes
   - Theora            : yes
   - Vorbis            : yes
   - WAV/AIFF          : yes (native)

 * Supported output formats
   - FDK-AAC           : yes
   - FFmpeg            : yes
   - MP3               : yes
   - MP3 (fixed-point) : yes
   - Flac (native)     : yes
   - Flac (ogg)        : yes
   - Opus              : yes
   - Speex             : yes
   - Theora            : yes
   - Vorbis            : yes
   - WAV/AIFF          : yes (native)

 * Tags
   - AAC               : yes
   - FFmpeg            : yes
   - FLAC (native)     : yes
   - Flac (ogg)        : yes
   - Native decoder    : yes
   - Vorbis            : yes

 * Input / output
   - ALSA              : yes
   - AO                : yes
   - FFmpeg            : yes
   - JACK              : yes
   - NDI               : yes
   - OSS               : yes
   - Portaudio         : yes
   - Pulseaudio        : yes
   - SRT               : yes

 * Audio manipulation
   - FFmpeg            : yes
   - LADSPA            : yes
   - Lilv              : yes
   - Samplerate        : yes
   - SoundTouch        : yes
   - StereoTool        : yes

 * Video manipulation
   - camlimages        : no (requires camlimages)
   - FFmpeg            : yes
   - frei0r            : yes
   - ImageLib          : no (requires imagelib)
   - SDL               : yes

 * MIDI manipulation
   - DSSI              : yes

 * Visualization
   - GD                : yes
   - Graphics          : no (requires graphics)
   - SDL               : yes

 * Additional libraries
   - FFmpeg filters    : yes
   - FFmpeg devices    : yes
   - inotify           : yes
   - irc               : yes
   - jemalloc          : no (requires jemalloc)
   - lastfm            : yes
   - lo                : yes
   - memtrace          : yes
   - osc               : yes
   - ssl               : yes
   - sqlite3           : yes
   - tls               : yes
   - posix-time2       : yes
   - windows service   : no (requires winsvc)
   - YAML support      : yes
   - XML playlists     : yes

 * Monitoring
   - Prometheus        : yes

Installation method

From official container image

Additional Info

No response

[gAlleb]

Couldn't reproduce. Works fine with me.

Build-config

 % liquidsoap --build-config

 * Liquidsoap version  : rolling-release-v2.3.x-48-g5cb4ad6+dev

 * Compilation options
   - Release build       : false
   - Git SHA             : (none)
   - OCaml version       : 4.14.2
   - OS type             : Unix
   - Libs versions       : angstrom=0.16.1 ao=0.2.4 base=v0.16.3 base.base_internalhash_types=v0.16.3 base.caml=v0.16.3 base.shadow_stdlib=v0.16.3 bigarray=[distributed with Ocaml] bigstringaf=0.10.0 bytes=[distributed with OCaml 4.02 or above] camlp-streams camomile.lib=2.0 cry=1.0.3 curl=0.9.2 domain_shims dtools=0.4.5 dune-build-info=3.17.0 dune-private-libs.dune-section=3.17.0 dune-site=3.17.0 dune-site.private=3.17.0 duppy=0.9.4 ffmpeg-av=1.2.1 ffmpeg-avcodec=1.2.1 ffmpeg-avdevice=1.2.1 ffmpeg-avfilter=1.2.1 ffmpeg-avutil=1.2.1 ffmpeg-swresample=1.2.1 ffmpeg-swscale=1.2.1 fileutils=0.6.4 gen=1.1 lame=0.3.7 liquidsoap-lang=rolling-release-v2.3.x-48-g5cb4ad6 liquidsoap-lang.console=rolling-release-v2.3.x-48-g5cb4ad6 liquidsoap_ao=rolling-release-v2.3.x-48-g5cb4ad6-dirty liquidsoap_builtins=rolling-release-v2.3.x-48-g5cb4ad6-dirty liquidsoap_core=rolling-release-v2.3.x-48-g5cb4ad6-dirty liquidsoap_ffmpeg=rolling-release-v2.3.x-48-g5cb4ad6-dirty liquidsoap_lame=rolling-release-v2.3.x-48-g5cb4ad6-dirty liquidsoap_optionals=rolling-release-v2.3.x-48-g5cb4ad6-dirty liquidsoap_portaudio=rolling-release-v2.3.x-48-g5cb4ad6-dirty liquidsoap_runtime=rolling-release-v2.3.x-48-g5cb4ad6-dirty liquidsoap_xmlplaylist=rolling-release-v2.3.x-48-g5cb4ad6-dirty magic-mime=1.3.1 mem_usage=0.1.1 menhirLib=20240715 metadata=0.3.0 mm=0.8.6 mm.audio=0.8.6 mm.base=0.8.6 mm.image=0.8.6 mm.midi=0.8.6 mm.video=0.8.6 portaudio=0.2.3 ppx_compare.runtime-lib=v0.16.0 ppx_hash.runtime-lib=v0.16.0 ppx_sexp_conv.runtime-lib=v0.16.0 re=1.12.0 saturn_lockfree=0.4.1 sedlex=3.3 seq=[distributed with OCaml 4.07 or above] sexplib0=v0.16.0 stdlib-shims=0.3.0 str=[distributed with Ocaml] stringext=1.6.0 threads=[distributed with Ocaml] threads.posix=[internal] unix=[distributed with Ocaml] uri=4.4.0 xml-light=2.5 xmlm=1.4.0 xmlplaylist=0.1.5
   - architecture        : amd64
   - host                : x86_64-apple-darwin22.6.0
   - target              : x86_64-apple-darwin22.6.0
   - system              : macosx
   - ocamlopt_cflags     : -O2 -fno-strict-aliasing -fwrapv -pthread
   - native_c_compiler   : cc -O2 -fno-strict-aliasing -fwrapv -pthread -D_FILE_OFFSET_BITS=64
   - native_c_libraries  : -lm

 * Configured paths
   - mode              : default
   - standard library  : (set by dune-site)
   - scripted binaries : (set by dune-site)
   - rundir            : (set by dune-site)
   - logdir            : (set by dune-site)
   - user cache        : $HOME/.cache/liquidsoap (override with $LIQ_CACHE_USER_DIR)
   - system cache      : (set by dune-site) (override with $LIQ_CACHE_SYSTEM_DIR)
   - camomile files    : (set by dune-site)

 * Supported input formats
   - MP3               : no (requires mad)
   - AAC               : no (requires faad)
   - Ffmpeg            : yes
   - Flac (native)     : no (requires flac)
   - Flac (ogg)        : no (requires ogg)
   - Opus              : no (requires opus)
   - Speex             : no (requires speex)
   - Theora            : no (requires theora)
   - Vorbis            : no (requires vorbis)
   - WAV/AIFF          : yes (native)

 * Supported output formats
   - FDK-AAC           : no (requires fdkaac)
   - FFmpeg            : yes
   - MP3               : yes
   - MP3 (fixed-point) : no (requires shine)
   - Flac (native)     : no (requires flac)
   - Flac (ogg)        : no (requires ogg)
   - Opus              : no (requires opus)
   - Speex             : no (requires speex)
   - Theora            : no (requires theora)
   - Vorbis            : no (requires vorbis)
   - WAV/AIFF          : yes (native)

 * Tags
   - AAC               : no (requires faad)
   - FFmpeg            : yes
   - FLAC (native)     : no (requires flac)
   - Flac (ogg)        : no (requires ogg)
   - Native decoder    : yes
   - Vorbis            : no (requires vorbis)

 * Input / output
   - ALSA              : no (requires alsa)
   - AO                : yes
   - FFmpeg            : yes
   - JACK              : no (requires bjack)
   - NDI               : no (requires ctypes-foreign)
   - OSS               : no (requires oss)
   - Portaudio         : yes
   - Pulseaudio        : no (requires pulseaudio)
   - SRT               : no (requires srt)

 * Audio manipulation
   - FFmpeg            : yes
   - LADSPA            : no (requires ladspa)
   - Lilv              : no (requires lilv)
   - Samplerate        : no (requires samplerate)
   - SoundTouch        : no (requires soundtouch)
   - StereoTool        : no (requires ctypes-foreign)

 * Video manipulation
   - camlimages        : no (requires camlimages)
   - FFmpeg            : yes
   - frei0r            : no (requires frei0r)
   - ImageLib          : no (requires imagelib)
   - SDL               : no (requires tsdl-image & tsdl-ttf)

 * MIDI manipulation
   - DSSI              : no (requires dssi)

 * Visualization
   - GD                : no (requires gd)
   - Graphics          : no (requires graphics)
   - SDL               : no (requires tsdl-image & tsdl-ttf)

 * Additional libraries
   - FFmpeg filters    : yes
   - FFmpeg devices    : yes
   - inotify           : no (requires inotify)
   - irc               : no (requires irc-client-unix)
   - jemalloc          : no (requires jemalloc)
   - lo                : no (requires lo)
   - memtrace          : no (requires memtrace)
   - osc               : no (requires osc-unix)
   - ssl               : no (requires ssl)
   - sqlite3           : no (requires sqlite3)
   - tls               : no (requires tls-liquidsoap)
   - posix-time2       : no (requires posix)
   - windows service   : no (requires winsvc)
   - YAML support      : no (requires yaml)
   - XML playlists     : yes

 * Monitoring
   - Prometheus        : no (requires prometheus)

Update: on docker savonet/liquidsoap:v2.3.0 doesn't work indeed.

[brenc]

Minimally reproducible script:

process.run("touch /tmp/testfile")

file.watch(
  "/tmp/testfile",
  {print("file changed")},
)

while true do
  print("writing")
  process.run("echo #{time()} >> /tmp/testfile")
  thread.pause(1.0)
end

I see "writing" every 1s but no "file changed".

[gAlleb]

Well, it does work fine, just doesn't print the info with your method on savonet/liquidsoap:v2.3.0 linux build.

success = ref(false)
file.watch(
  "/tmp/testfile",
  {success := true},
)
thread.run(every=1.,fun() -> print("#{success()}"))
output.dummy(sine())

ref gets changed.

file.watch(
  "/tmp/testfile",
  {log("file has changed")},
)

log works too.

And print works too if we alter your function a little:

file.watch(
  "/tmp/testfile",
  fun() -> print("file has changed"),
)

Actually I have tried again with {print("testfile changed")}, and it seems to work too) Hm)

Everything seems to work on this build too:

This build

 * Liquidsoap version  : 2.3.0

 * Compilation options
   - Release build       : true
   - Git SHA             : (none)
   - OCaml version       : 4.14.2
   - OS type             : Unix
   - Libs versions       : alsa=0.3.0 angstrom=0.16.1 ao=0.2.4 asetmap=0.8.1 asn1-combinators=0.3.2 astring=0.8.5 base=v0.16.3 base.base_internalhash_types=v0.16.3 base.caml=v0.16.3 base.shadow_stdlib=v0.16.3 base64=3.5.1 bigarray=[distributed with Ocaml] bigarray-compat=1.1.0 bigstringaf=0.10.0 bjack=0.1.6 bos=0.2.1 bytes=[distributed with OCaml 4.02 or above] ca-certs=v1.0.0 camlp-streams camomile.lib=2.0 cohttp=5.3.1 cohttp-lwt=5.3.0 cohttp-lwt-unix=5.3.0 conduit=7.1.0 conduit-lwt=7.1.0 conduit-lwt-unix=7.1.0 cry=1.0.3 cstruct=6.2.0 ctypes=0.23.0 ctypes-foreign=0.23.0 ctypes.stubs=0.23.0 curl=0.9.2 digestif.c=1.2.0 domain-name=0.4.0 domain_shims dssi=0.1.5 dtools=0.4.5 dune-build-info=3.16.1 dune-private-libs.dune-section=3.16.1 dune-site=3.16.1 dune-site.private=3.16.1 duppy=0.9.4 eqaf=0.10 faad=0.5.2 fdkaac=0.3.3 ffmpeg-av=1.2.1 ffmpeg-avcodec=1.2.1 ffmpeg-avdevice=1.2.1 ffmpeg-avfilter=1.2.1 ffmpeg-avutil=1.2.1 ffmpeg-swresample=1.2.1 ffmpeg-swscale=1.2.1 fileutils=0.6.4 flac=0.5.1 flac.decoder=0.5.1 flac.ogg=0.5.1 fmt=0.9.0 fpath=0.7.3 frei0r=0.1.2 gd=1.1 gen=1.1 gmap=0.3.0 inotify=v2.6 integers ipaddr=5.6.0 ipaddr-sexp=5.6.0 ipaddr.unix=5.6.0 irc-client irc-client-unix kdf.hkdf=1.0.0 kdf.pbkdf=1.0.0 ladspa=0.2.2 lame=0.3.7 lastfm=0.3.4 lilv=0.2.0 liquidsoap-lang=2.3.0 liquidsoap-lang.console=2.3.0 liquidsoap_alsa=v2.3.0-2-g658a641 liquidsoap_ao=v2.3.0-2-g658a641 liquidsoap_bjack=v2.3.0-2-g658a641 liquidsoap_builtins=v2.3.0-2-g658a641 liquidsoap_core=v2.3.0-2-g658a641 liquidsoap_dssi=v2.3.0-2-g658a641 liquidsoap_faad=v2.3.0-2-g658a641 liquidsoap_fdkaac=v2.3.0-2-g658a641 liquidsoap_ffmpeg=v2.3.0-2-g658a641 liquidsoap_flac=v2.3.0-2-g658a641 liquidsoap_frei0r=v2.3.0-2-g658a641 liquidsoap_gd=v2.3.0-2-g658a641 liquidsoap_irc=v2.3.0-2-g658a641 liquidsoap_ladspa=v2.3.0-2-g658a641 liquidsoap_lame=v2.3.0-2-g658a641 liquidsoap_lastfm=v2.3.0-2-g658a641 liquidsoap_lilv=v2.3.0-2-g658a641 liquidsoap_lo=v2.3.0-2-g658a641 liquidsoap_mad=v2.3.0-2-g658a641 liquidsoap_ndi=v2.3.0-2-g658a641 liquidsoap_ogg=v2.3.0-2-g658a641 liquidsoap_ogg_flac=v2.3.0-2-g658a641 liquidsoap_optionals=v2.3.0-2-g658a641 liquidsoap_opus=v2.3.0-2-g658a641 liquidsoap_osc=v2.3.0-2-g658a641 liquidsoap_oss=v2.3.0-2-g658a641 liquidsoap_portaudio=v2.3.0-2-g658a641 liquidsoap_posix_time=v2.3.0-2-g658a641 liquidsoap_prometheus=v2.3.0-2-g658a641 liquidsoap_pulseaudio=v2.3.0-2-g658a641 liquidsoap_runtime=v2.3.0-2-g658a641 liquidsoap_samplerate=v2.3.0-2-g658a641 liquidsoap_sdl=v2.3.0-2-g658a641 liquidsoap_sdl_log_level=v2.3.0-2-g658a641 liquidsoap_shine=v2.3.0-2-g658a641 liquidsoap_soundtouch=v2.3.0-2-g658a641 liquidsoap_speex=v2.3.0-2-g658a641 liquidsoap_sqlite=v2.3.0-2-g658a641 liquidsoap_srt=v2.3.0-2-g658a641 liquidsoap_ssl=v2.3.0-2-g658a641 liquidsoap_stereotool=v2.3.0-2-g658a641 liquidsoap_theora=v2.3.0-2-g658a641 liquidsoap_tls=v2.3.0-2-g658a641 liquidsoap_vorbis=v2.3.0-2-g658a641 liquidsoap_xmlplaylist=v2.3.0-2-g658a641 liquidsoap_yaml=v2.3.0-2-g658a641 lo=0.2.0 logs=0.7.0 logs.fmt=0.7.0 logs.lwt=0.7.0 lwt lwt.unix macaddr=5.6.0 mad=0.5.3 magic-mime=1.3.1 mem_usage=0.1.1 memtrace=0.2.3 menhirLib=20240715 metadata=0.3.0 mirage-crypto=1.1.0 mirage-crypto-ec=1.1.0 mirage-crypto-pk=1.1.0 mirage-crypto-rng=1.1.0 mirage-crypto-rng.unix=1.1.0 mm=0.8.6 mm.audio=0.8.6 mm.base=0.8.6 mm.image=0.8.6 mm.midi=0.8.6 mm.video=0.8.6 ndi=v2.3.0-2-g658a641 ocplib-endian ocplib-endian.bigstring ogg=0.7.4 ogg.decoder=0.7.4 ohex opus=0.2.3 opus.decoder=0.2.3 osc osc-unix portaudio=0.2.3 posix-base=5a7f328 posix-socket=5a7f328 posix-socket.constants=5a7f328 posix-socket.stubs=5a7f328 posix-socket.types=5a7f328 posix-time2=5a7f328 posix-time2.constants=5a7f328 posix-time2.stubs=5a7f328 posix-time2.types=5a7f328 posix-types=5a7f328 posix-types.constants=5a7f328 ppx_compare.runtime-lib=v0.16.0 ppx_hash.runtime-lib=v0.16.0 ppx_sexp_conv.runtime-lib=v0.16.0 prometheus=1.2 prometheus-app=1.2 ptime=1.2.0 ptime.clock=1.2.0 ptime.clock.os=1.2.0 pulseaudio=0.1.6 re=1.12.0 result=1.5 rresult=0.7.0 samplerate=0.1.7 saturn_lockfree=0.4.1 sedlex=3.3 seq=[distributed with OCaml 4.07 or above] sexplib0=v0.16.0 shine=0.2.3 soundtouch=0.1.9 speex=0.4.2 speex.decoder=0.4.2 sqlite3=5.2.0 srt=0.3.1 srt.constants=0.3.1 srt.stubs=0.3.1 srt.stubs.locked=0.3.1 srt.types=0.3.1 ssl=0.7.0 stdlib-shims=0.3.0 stereotool=v2.3.0-2-g658a641 str=[distributed with Ocaml] stringext=1.6.0 theora=0.4.1 theora.decoder=0.4.1 threads=[distributed with Ocaml] threads.posix=[internal] tls=1.0.2 tsdl=v1.1.0 tsdl-image=0.5 tsdl-ttf=0.6 unix=[distributed with Ocaml] unix-errno=52c6ecb unix-errno.errno_bindings=52c6ecb unix-errno.errno_types=52c6ecb unix-errno.errno_types_detected=52c6ecb unix-errno.unix=52c6ecb uri=4.4.0 uri-sexp=4.4.0 uri.services=4.4.0 vorbis=0.8.1 vorbis.decoder=0.8.1 x509=1.0.5 xmlm=1.4.0 xmlplaylist=0.1.5 yaml=3.2.0 yaml.bindings=3.2.0 yaml.bindings.types=3.2.0 yaml.c=3.2.0 yaml.ffi=3.2.0 yaml.types=3.2.0 zarith=1.14
   - architecture        : amd64
   - host                : x86_64-pc-linux-gnu
   - target              : x86_64-pc-linux-gnu
   - system              : linux
   - ocamlopt_cflags     : -O2 -fno-strict-aliasing -fwrapv -pthread -fPIC
   - native_c_compiler   : gcc -O2 -fno-strict-aliasing -fwrapv -pthread -fPIC -D_FILE_OFFSET_BITS=64
   - native_c_libraries  : -lm

 * Configured paths
   - mode              : posix
   - standard library  : /usr/share/liquidsoap/libs
   - scripted binaries : /usr/share/liquidsoap/bin
   - rundir            : /var/run/liquidsoap
   - logdir            : /var/log/liquidsoap
   - user cache        : $HOME/.cache/liquidsoap (override with $LIQ_CACHE_USER_DIR)
   - system cache      : /var/cache/liquidsoap (override with $LIQ_CACHE_SYSTEM_DIR)
   - camomile files    : /usr/share/liquidsoap/camomile

 * Supported input formats
   - MP3               : yes
   - AAC               : yes
   - Ffmpeg            : yes
   - Flac (native)     : yes
   - Flac (ogg)        : yes
   - Opus              : yes
   - Speex             : yes
   - Theora            : yes
   - Vorbis            : yes
   - WAV/AIFF          : yes (native)

 * Supported output formats
   - FDK-AAC           : yes
   - FFmpeg            : yes
   - MP3               : yes
   - MP3 (fixed-point) : yes
   - Flac (native)     : yes
   - Flac (ogg)        : yes
   - Opus              : yes
   - Speex             : yes
   - Theora            : yes
   - Vorbis            : yes
   - WAV/AIFF          : yes (native)

 * Tags
   - AAC               : yes
   - FFmpeg            : yes
   - FLAC (native)     : yes
   - Flac (ogg)        : yes
   - Native decoder    : yes
   - Vorbis            : yes

 * Input / output
   - ALSA              : yes
   - AO                : yes
   - FFmpeg            : yes
   - JACK              : yes
   - NDI               : yes
   - OSS               : yes
   - Portaudio         : yes
   - Pulseaudio        : yes
   - SRT               : yes

 * Audio manipulation
   - FFmpeg            : yes
   - LADSPA            : yes
   - Lilv              : yes
   - Samplerate        : yes
   - SoundTouch        : yes
   - StereoTool        : yes

 * Video manipulation
   - camlimages        : no (requires camlimages)
   - FFmpeg            : yes
   - frei0r            : yes
   - ImageLib          : no (requires imagelib)
   - SDL               : yes

 * MIDI manipulation
   - DSSI              : yes

 * Visualization
   - GD                : yes
   - Graphics          : no (requires graphics)
   - SDL               : yes

 * Additional libraries
   - FFmpeg filters    : yes
   - FFmpeg devices    : yes
   - inotify           : yes
   - irc               : yes
   - jemalloc          : no (requires jemalloc)
   - lastfm            : yes
   - lo                : yes
   - memtrace          : yes
   - osc               : yes
   - ssl               : yes
   - sqlite3           : yes
   - tls               : yes
   - posix-time2       : yes
   - windows service   : no (requires winsvc)
   - YAML support      : yes
   - XML playlists     : yes

 * Monitoring
   - Prometheus        : yes

This indeed doesn't work.

process.run("touch /tmp/testfile")

file.watch(
  "/tmp/testfile",
  {print("file changed")},
)

while true do
  print("writing")
  process.run("echo #{time()} >> /tmp/testfile")
  thread.pause(1.0)
end

However this works.

process.run("touch /tmp/testfile")

file.watch(
  "/tmp/testfile",
  {print("file changed")},
)

def writeF()
  print("writing")
  process.run("echo #{time()} >>  /tmp/testfile")
end

thread.run(every=5.0, writeF)

output.dummy(sine())

[vitoyucepi]

Hi everyone,
The file.watch function may not be triggered when the file address has changed because it provides a high-level interface for inotify.
Here are some examples that come to mind

1. vim doesn't trigger inotify on save;
2. docker doesn't update file mounts.

[brenc]

Yeah I don't get what's going on. This more closely mimics what I was trying to do. It works for 30s or so after LS starts but then stops working:

process.run("touch /tmp/testfile")

file.watch(
  "/tmp/testfile",
  {print("file changed")},
)

output.dummy(sine())

Then in the console echo "TEST" >> /tmp/testfile in the container.

This also works for a bit, but then stops working (you'll see "writing" but no "file changed" after 20-30s):

process.run("touch /tmp/testfile")

file.watch(
  "/tmp/testfile",
  {print("file changed")},
)

def write()
  print("writing")
  process.run("echo #{time()} >> /tmp/testfile")
end

thread.run(every=1.0, write)

output.dummy(sine())

@vitoyucepi not using vim (that can be configured to trigger inotify, as I recall) and not using bind mounts. I've tried NFS, bind, and local container FS all same deal.

[vitoyucepi]

Got it 30 seconds after start, present in 2.3.0 but not in 2.2.5.

compose.yaml

services:
  ls22:
    image: savonet/liquidsoap:v2.2.5
    command: /tmp/test/main.liq
    volumes:
      - ./:/tmp/test/
  ls23:
    image: savonet/liquidsoap:v2.3.0
    command: /tmp/test/main.liq
    volumes:
      - ./:/tmp/test/

mail.liq

process.run("touch /tmp/testfile")

file.watch(
  "/tmp/testfile",
  {print("#{time.up()} file changed")},
)

def write()
  state = process.run("stat -c '%i' /tmp/testfile")
  print("#{time.up()} #{string.trim(state.stdout)} writing")
  process.run("echo #{time()} >> /tmp/testfile")
end

thread.run(every=1.0, write)

output.dummy(sine())