Extracts the plugin instance ID of the feed node a path is in.
A feed is a chain of nodes, feed_N/<plugin>_<ID>/<plugin>_<ID>/…, and
each node keeps its output under data. The node is the last
<name>_<ID> of that chain: the walk starts after feed_N and stops at
the first data folder or at any segment that is not a node's name, so a
folder inside a node's output (data/subject_01, data/sub_7/run_2) is
never read as a node, however it is named (#1268).
Parameters
dirPath: string
The directory path to analyze.
Returns number|null
The plugin instance ID as a number, or null if not found.
Example
// From deep inside a node's output path_extractPluginInstanceID('/home/chris/feeds/feed_123/pl-dircopy_456/data/subject_01/') // Returns: 456
// A child node, from its data directory path_extractPluginInstanceID('/home/chris/feeds/feed_123/pl-dircopy_456/pl-dcm2niix_789/data/') // Returns: 789
Extracts the plugin instance ID of the feed node a path is in.
A feed is a chain of nodes,
feed_N/<plugin>_<ID>/<plugin>_<ID>/…, and each node keeps its output underdata. The node is the last<name>_<ID>of that chain: the walk starts afterfeed_Nand stops at the firstdatafolder or at any segment that is not a node's name, so a folder inside a node's output (data/subject_01,data/sub_7/run_2) is never read as a node, however it is named (#1268).