Using queries to the ESGF API to generate urls and keyword arguments for receipe generation in pangeo-forge

Pangeo forge recipes require the user to provide exact instance_id's for the datasets they want to be processed. Discovering these with the web search can become cumbersome, especially when dealing with a large number of members/models etc.

pangeo-forge-esgf provides some functions to query the ESGF API based on instance_id values with wildcards.

For example if you want to find all the zonal (uo) and meridonal (vo) velocities available for the lgm experiment of PMIP, you can do:

from pangeo_forge_esgf.parsing import parse_instance_ids
parse_iids = [
    "CMIP6.PMIP.*.*.lgm.*.*.uo.*.*",
    "CMIP6.PMIP.*.*.lgm.*.*.vo.*.*",
]
iids = []
for piid in parse_iids:
    iids.extend(parse_instance_ids(piid))
iids

and you will get:

['CMIP6.PMIP.MIROC.MIROC-ES2L.lgm.r1i1p1f2.Omon.uo.gn.v20191002',
 'CMIP6.PMIP.AWI.AWI-ESM-1-1-LR.lgm.r1i1p1f1.Odec.uo.gn.v20200212',
 'CMIP6.PMIP.AWI.AWI-ESM-1-1-LR.lgm.r1i1p1f1.Omon.uo.gn.v20200212',
 'CMIP6.PMIP.MIROC.MIROC-ES2L.lgm.r1i1p1f2.Omon.uo.gr1.v20200911',
 'CMIP6.PMIP.MPI-M.MPI-ESM1-2-LR.lgm.r1i1p1f1.Omon.uo.gn.v20200909',
 'CMIP6.PMIP.AWI.AWI-ESM-1-1-LR.lgm.r1i1p1f1.Omon.vo.gn.v20200212',
 'CMIP6.PMIP.MIROC.MIROC-ES2L.lgm.r1i1p1f2.Omon.vo.gn.v20191002',
 'CMIP6.PMIP.AWI.AWI-ESM-1-1-LR.lgm.r1i1p1f1.Odec.vo.gn.v20200212',
 'CMIP6.PMIP.MIROC.MIROC-ES2L.lgm.r1i1p1f2.Omon.vo.gr1.v20200911',
 'CMIP6.PMIP.MPI-M.MPI-ESM1-2-LR.lgm.r1i1p1f1.Omon.vo.gn.v20190710']

Eventually I hope I can leverage this functionality to handle user requests in PRs that add wildcard instance_ids, but for now this might be helpful to manually construct lists of instance_ids to submit to a pangeo-forge feedstock.