Install extensions from the command line using Slicer 5.2.2

Support
, ,
10

And here is an improved version allowing to install extensions in Slicer 5.2.2 while passing extension names as regular arguments:

import sys


def install_exttension(extensionName, installDependencies=True):
    print(f"\nInstalling extension {extensionName}")
    em = slicer.app.extensionsManagerModel()
    if em.isExtensionInstalled(extensionName):
        print(f"Extension {extensionName} already installed")
        return

    em.interactive = False  # prevent display of popups
    em.updateExtensionsMetadataFromServer(True, True)  # update extension metadata from server now

    if not em.downloadAndInstallExtensionByName(extensionName, installDependencies, True):
        raise ValueError(f"Failed to install {extensionName} extension")


if __name__ == "__main__":
    for extensionName in sys.argv[1:]:
        install_exttension(extensionName)

For future reference, to install extension in Slicer 5.4, there is a dedicated API to do so. See here

Then, to install extensions:

$ ads/Slicer-5.2.2-linux-amd64/Slicer \
  --exit-after-startup \
  --no-main-window \
  --disable-modules \
  --python-script /tmp/install_slicer_extension.py \
  Sandbox \
  SlicerHeart \
  SlicerDMRI

and example of output:

Installing extension Sandbox
Retrieving extension metadata for Sandbox extension
Retrieving Sandbox extension files (extensionId: 63f5ca688939577d9867ba35)
Downloading Sandbox extension (item_id: 63f5ca688939577d9867ba35, file_id: 64c8c82516826926710d5a97)
Installed extension Sandbox (63f5ca688939577d9867ba35) revision e163d61

Installing extension SlicerHeart
Retrieving extension metadata for SlicerHeart extension
Retrieving SlicerHeart extension files (extensionId: 63f5f3f08939577d9867dbc7)
Downloading SlicerHeart extension (item_id: 63f5f3f08939577d9867dbc7, file_id: 64de321206a93d6cff35a4c1)
"The following extensions are required by SlicerHeart extension therefore they will be installed now: SlicerIGT, SlicerIGSIO"
Retrieving extension metadata for SlicerIGT extension
Retrieving SlicerIGT extension files (extensionId: 63f5f2d78939577d9867da34)
Downloading SlicerIGT extension (item_id: 63f5f2d78939577d9867da34, file_id: 64aa9a94b81c954f339bfef6)
Retrieving extension metadata for SlicerIGSIO extension
Retrieving SlicerIGSIO extension files (extensionId: 63f5da488939577d9867c528)
Downloading SlicerIGSIO extension (item_id: 63f5da488939577d9867c528, file_id: 64c0f2c6c0e19dd3b30f7352)
Installed extension SlicerHeart (63f5f3f08939577d9867dbc7) revision 09e440d
Installed extension SlicerIGT (63f5f2d78939577d9867da34) revision 245fa92
Installed extension SlicerIGSIO (63f5da488939577d9867c528) revision b6328fd

Installing extension SlicerDMRI
Retrieving extension metadata for SlicerDMRI extension
Retrieving SlicerDMRI extension files (extensionId: 63fb32ce8939577d9869e2b2)
Downloading SlicerDMRI extension (item_id: 63fb32ce8939577d9869e2b2, file_id: 64ccc3ed16826926710f2500)
"The following extensions are required by SlicerDMRI extension therefore they will be installed now: UKFTractography"
Retrieving extension metadata for UKFTractography extension
Retrieving UKFTractography extension files (extensionId: 63f5eae38939577d9867d2b3)
Downloading UKFTractography extension (item_id: 63f5eae38939577d9867d2b3, file_id: 63f5eae38939577d9867d2ba)
Installed extension SlicerDMRI (63fb32ce8939577d9869e2b2) revision aad4331
Installed extension UKFTractography (63f5eae38939577d9867d2b3) revision fcf83e2