From c02f0b8182b35df1a318418bbd0036c00be93b5c Mon Sep 17 00:00:00 2001
From: Eric Wong <e@80x24.org>
Date: Tue, 19 May 2015 09:14:23 +0000
Subject: source/splitfx: allow watching extra external scripts

Since writing nested shell commands inside YAML is subject to all
sorts of strange quoting rules, encourage users to rely on external
scripts which the YAML file refers to instead.  These scripts can be
written in any reasonable scripting language capable of executing
other commands.

This allows transparently monitoring things such as `my-script.rb'
in the below example when playing my-splitfx.yml via dtas-player:

  --------------------- my-splitfx.yml -----------------------
  infile: input.flac
  command: $INDIR/my-script.rb "$INFILE"
  ...

  --------------------- my-script.rb --------------------------
  #!/usr/bin/ruby
  require 'shellwords'
  infile = ARGV.shift
  ch = %W(sox #{infile} -p).concat((ENV['TRIMFX'] || '').shellsplit)
  fx = %W(highpass 25 gain 9)
  l = ch.dup.concat(%W(remix 1v1)).concat(fx).concat(%w(contrast 30))
  r = ch.dup.concat(%W(remix 2v1)).concat(fx).concat(%w(contrast 0))
  cmd = %W(sox -M |#{l.shelljoin} |#{r.shelljoin})
  cmd.concat((ENV['SOXFMT'] || '-p').shellsplit)
  cmd.concat(%w(- stats))
  warn cmd.inspect
  exec *cmd
---
 lib/dtas/source/splitfx.rb | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'lib/dtas/source')

diff --git a/lib/dtas/source/splitfx.rb b/lib/dtas/source/splitfx.rb
index b7b9b86..02c3a9d 100644
--- a/lib/dtas/source/splitfx.rb
+++ b/lib/dtas/source/splitfx.rb
@@ -17,6 +17,7 @@ class DTAS::Source::SplitFX < DTAS::Source::Sox # :nodoc:
 
   def initialize(sox = DTAS::Source::Sox.new)
     command_init(SPLITFX_DEFAULTS)
+    @watch_extra = []
     @sox = sox
   end
 
@@ -65,6 +66,19 @@ class DTAS::Source::SplitFX < DTAS::Source::Sox # :nodoc:
     e = @env.merge!(player_format.to_env)
     @sfx.infile_env(e, @sox.infile)
 
+    # watch any scripts or files the command in the YAML file refers to
+    if c = @sfx.command
+      @sfx.expand_cmd(e, c).each do |f|
+        File.readable?(f) and @watch_extra << f
+      end
+    end
+
+    # allow users to specify explicit depdendencies to watch for edit
+    case extra = @ymlhash['deps']
+    when Array, String
+      @watch_extra.concat(Array(extra))
+    end
+
     # make sure these are visible to the "current" command...
     e["TRIMFX"] = trimfx
     e["RGFX"] = rg_state.effect(self) || nil
-- 
cgit v1.2.3-24-ge0c7