From ce549cd9494228998ee6689d095ca06c171fff11 Mon Sep 17 00:00:00 2001
From: Koen van Greevenbroek <koen.v.greevenbroek@uit.no>
Date: Mon, 18 Mar 2024 10:00:42 +0100
Subject: [PATCH 1/2] Allow the retrieval of cost data from forks of
 technology-data

---
 scripts/retrieve_cost_data.py | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/scripts/retrieve_cost_data.py b/scripts/retrieve_cost_data.py
index eb1ef041..39fcab7c 100644
--- a/scripts/retrieve_cost_data.py
+++ b/scripts/retrieve_cost_data.py
@@ -25,9 +25,10 @@ if __name__ == "__main__":
     set_scenario_config(snakemake)
 
     version = snakemake.params.version
-    baseurl = (
-        f"https://raw.githubusercontent.com/PyPSA/technology-data/{version}/outputs/"
-    )
+    if "/" in version:
+        baseurl = f"https://raw.githubusercontent.com/{version}/outputs"
+    else:
+        baseurl = f"https://raw.githubusercontent.com/PyPSA/technology-data/{version}/outputs/"
     filepath = Path(snakemake.output[0])
     url = baseurl + filepath.name
 

From 1f499eda6ffb20ed81c15a1b6a3a8557a53e18d4 Mon Sep 17 00:00:00 2001
From: Koen van Greevenbroek <koen.v.greevenbroek@uit.no>
Date: Mon, 18 Mar 2024 13:31:04 +0100
Subject: [PATCH 2/2] Document new handling of costs version config option

---
 doc/configtables/costs.csv | 2 +-
 doc/release_notes.rst      | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/doc/configtables/costs.csv b/doc/configtables/costs.csv
index b69c0bf9..03933c18 100644
--- a/doc/configtables/costs.csv
+++ b/doc/configtables/costs.csv
@@ -1,6 +1,6 @@
 ,Unit,Values,Description
 year,--,YYYY; e.g. '2030',Year for which to retrieve cost assumptions of ``resources/costs.csv``.
-version,--,vX.X.X; e.g. 'v0.5.0',Version of ``technology-data`` repository to use.
+version,--,vX.X.X or <user>/<repo>/vX.X.X; e.g. 'v0.5.0',Version of ``technology-data`` repository to use. If this string is of the form <user>/<repo>/<version> then costs are instead retrieved from ``github.com/<user>/<repo>`` at the <version> tag.
 rooftop_share,--,float,Share of rooftop PV when calculating capital cost of solar (joint rooftop and utility-scale PV).
 social_discountrate,p.u.,float,Social discount rate to compare costs in different investment periods. 0.02 corresponds to a social discount rate of 2%.
 fill_values,--,float,Default values if not specified for a technology in ``resources/costs.csv``.
diff --git a/doc/release_notes.rst b/doc/release_notes.rst
index 11fd3df7..21094250 100644
--- a/doc/release_notes.rst
+++ b/doc/release_notes.rst
@@ -82,6 +82,8 @@ Upcoming Release
 
 * Upgrade default techno-economic assumptions to ``technology-data`` v0.8.1.
 
+* Add possibility to download cost data from custom fork of ``technology-data``.
+
 * Linearly interpolate missing investment periods in year-dependent
   configuration options.