PDG

Creating Work Items from files in Subdirectories

Let’s say you have a folder with the following struct:

https://app.eraser.io/workspace/83k3lPDurIY7loWDNsN6?origin=share

And you want to do the following:

1. Create a work item for each directory under /home/folder
2. Under each directory, glob all *.jpg files and add it as a array attribute to each respective work item
3. Do some additional processing on the array to split it into different attributes

Creating Initial Work Items and Array

1. Create a filepattern node and set the File Types : Directories Only , then set pattern to /home/folder/* Enable Output Attribute and set it as subdirs

Tip

This creates 3 work items for each of the folders under /home/folder with two attributes, filename and subdir. filename will be the base name of the folder; eg. files1 while subdirs will be the full path to the folder

1. Create a second filepattern node and set File Types : Files Only , and disable Split Files into Separate Items. This will disable the creation of additional work items and instead append all files returned by the node into an array attribute.
2. Set the pattern to @subdirs\*.jpg This will look for all files with a jpg extension under each subdir work item. Enable Output Attribute and set it to images.

Tip

@subdir has to be enclosed in back-ticks as pattern is a string parameter.

1. Now you have 3 work items with an array attribute with all the nested jpgs. The only good way to manipulate the attribute array is with Python.

#The current work item is automatically assigned to the variable work_item
#Importing a attribute from work_items 
images = work_item.fileAttribArray('images')
for image in images:
	#do stuff
#Creating a new attribute and writing to it
work_item.addAttrib("diffuse_texture",pdg.attribType.File)
work_item.setFileAttrib("diffuse_texture", somefile)
#use .addMessage() method for stdout into the worker log
work_item.addMessage("Created diffuse_texture attribute")
 
#Random Note
#To get a path of pdg.File class aka the elements in images
#You have to use pdg.File.path; in this case in the for loop
#it would be image.path which returns: /home/folder/files1/eg.jpg