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#!/usr/bin/env nix-shell
#! nix-shell -i bash --pure -p curl cacert nix jq
#! nix-shell -I nixpkgs=https://github.com/NixOS/nixpkgs/archive/5b2c2d84341b2afb5647081c1386a80d7a8d8605.tar.gz
# ^
# |
# nixos-unstable ~ 2026-03-16 -----------------/
set -o errexit
set -o nounset
# scrape the downloads page for release info
curl -s -O https://download.eclipse.org/eclipse/downloads/data.json
trap "rm data.json" EXIT
dlquery() {
q="$1"
cat data.json | jq -r ".releases[0] | $q";
}
# extract release info from download page HTML
platform_major=$(dlquery '.label | split(".") | .[0]');
platform_minor=$(dlquery '.label | split(".") | .[1]');
year=$(dlquery '.path | split("/") | .[] | select(. | startswith("R")) | split("-") | .[2] | .[0:4]')
buildmonth=$(dlquery '.path | split("/") | .[] | select(. | startswith("R")) | split("-") | .[2] | .[4:6]')
builddaytime=$(dlquery '.path | split("/") | .[] | select(. | startswith("R")) | split("-") | .[2] | .[6:12]')
timestamp="${year}${buildmonth}${builddaytime}";
# account for possible release-month vs. build-month mismatches
month=$buildmonth;
case "$buildmonth" in
'02'|'04') month='03' ;;
'05'|'07') month='06' ;;
'08'|'10') month='09' ;;
'11'|'01') month='12' ;;
esac
ECLIPSES_JSON=$(dirname $0)/eclipses.json;
t=$(mktemp);
# note: including platform_major, platform_minor, and version may seem redundant
# the first two are needed for the derivation itself; the third is necessary so
# that nixpkgs-update can see that the version changes as a result of this update
# script.
cat $ECLIPSES_JSON | jq ". + {platform_major: \"${platform_major}\",platform_minor: \"${platform_minor}\",version:\"${platform_major}.${platform_minor}\",year: \"${year}\",month: \"${month}\",buildmonth: \"${buildmonth}\",dayHourMinute: \"${builddaytime}\"}" > $t;
mv $t $ECLIPSES_JSON;
# prefetch new download hashes
for id in $(cat $ECLIPSES_JSON | jq -r '.eclipses | keys | .[]'); do
for arch in x86_64 aarch64; do
if [ $(cat $ECLIPSES_JSON | jq -r ".eclipses.${id}.dropUrl") == "true" ]; then
url="https://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/eclipse/downloads/drops${platform_major}/R-${platform_major}.${platform_minor}-${timestamp}/eclipse-${id}-${platform_major}.${platform_minor}-linux-gtk-${arch}.tar.gz";
else
url="https://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/technology/epp/downloads/release/${year}-${month}/R/eclipse-${id}-${year}-${month}-R-linux-gtk-${arch}.tar.gz";
fi
# sometimes a mirror is down; retrying a few times should eventually get us redirected to a working mirror
for try in $(seq 1 5); do
echo "prefetching ${id} ${arch} (try ${try})";
h=$(nix store prefetch-file --json "$url" | jq -r .hash);
if [ "$h" != "" ]; then break; fi
done
if [ "$h" == "" ]; then
echo "unable to prefetch and hash ${id} for ${arch} from ${url}";
echo "see above output for errors";
exit 1;
fi
t=$(mktemp);
cat $ECLIPSES_JSON | jq -r ".eclipses.${id}.hashes.${arch} = \"${h}\"" > $t;
mv $t $ECLIPSES_JSON;
done
done
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