eventstore: Fix create-deps.sh script and update dependencies

The old version of the script tried to parse the output of the dotnet tool, but
apparently, that output changed and thus the list of dependencies was empty.

pkgs/servers/nosql/eventstore/create-deps.sh

@@ -1,34 +1,98 @@
-# 1. create a log with `dotnet restore -v m MyPackage.sln > mypackage-restore.log
-# 2. then call ./create-deps.sh mypackage-restore.log
+#! /usr/bin/env nix-shell
+#! nix-shell -i bash -p dotnet-sdk_5 jq xmlstarlet curl nixpkgs-fmt
+set -euo pipefail
 
-urlbase="https://www.nuget.org/api/v2/package"
-cat << EOL
-{ fetchurl }: let
+# Run this script to generate deps.nix
 
+# TODO: consolidate with other dotnet deps generation scripts by which
+#       this script is inspired:
+#       - pkgs/servers/nosql/eventstore/create-deps.sh
+#       - pkgs/development/dotnet-modules/python-language-server/create_deps.sh
+#       - pkgs/misc/emulators/ryujinx/updater.sh
+
+cd "$(dirname "${BASH_SOURCE[0]}")"
+
+deps_file="$(realpath "./deps.nix")"
+
+exec 2>&1 6> "$deps_file"
+
+store_src="$( nix-build ../../../.. -A eventstore.src --no-out-link )"
+src="$(mktemp -d)"
+cp -rT "$store_src" "$src"
+chmod -R +w "$src"
+pushd "$src"
+
+URLBASE="https://www.nuget.org/api/v2/package"
+
+DEPS_HEADER="
+{ fetchurl }:
+let
+  nugetUrlBase = \"$URLBASE\";
   fetchNuGet = { name, version, sha256 }: fetchurl {
     inherit sha256;
-    url = "$urlbase/\${name}/\${version}";
+    url = \"\${nugetUrlBase}/\${name}/\${version}\";
   };
+in ["
 
-in [
-EOL
-IFS=''
-while read line; do
-  if echo $line | grep -q "Installing "; then
-    name=$(echo $line | sed -r 's/  Installing ([^ ]+) (.+)./\1/')
-    version=$(echo $line | sed -r 's/  Installing ([^ ]+) (.+)./\2/')
-    sha256=$(nix-prefetch-url "$urlbase/$name/$version" 2>/dev/null)
-    cat << EOL
+DEPS_FOOTER="]"
 
-  (fetchNuGet {
-    name = "$name";
-    version = "$version";
-    sha256 = "$sha256";
-  })
-EOL
-  fi
-done < $1
-cat << EOL
+DEPS_TEMPLATE="
+(fetchNuGet {
+  name = \"%s\";
+  version = \"%s\";
+  sha256 = \"%s\";
+})"
 
-]
-EOL
+tmpdir="$(mktemp -d -p "$(pwd)")" # must be under source root
+trap 'rm -rf "$tmpdir"' EXIT
+
+HOME="$tmpdir" dotnet restore --packages "$tmpdir"/.nuget/packages \
+        --no-cache --force --runtime linux-x64 \
+        src/EventStore.sln >&2
+
+mapfile -t repos < <(
+    xmlstarlet sel -t -v 'configuration/packageSources/add/@value' -n NuGet.config "$tmpdir"/.nuget/NuGet/NuGet.Config |
+        while IFS= read index
+        do
+            curl --compressed -fsL "$index" | \
+                jq -r '.resources[] | select(."@type" == "PackageBaseAddress/3.0.0")."@id"'
+        done
+)
+
+echo $DEPS_HEADER >&6
+
+cd "$tmpdir/.nuget/packages"
+for package in *
+do
+    cd "$package"
+    for version in *
+    do
+        found=false
+        for repo in "${repos[@]}"
+        do
+            url="$repo$package/$version/$package.$version.nupkg"
+            if curl -fsL "$url" -o /dev/null
+            then
+                found=true
+                break
+            fi
+        done
+
+        if ! $found
+        then
+            echo "couldn't find $package $version" >&2
+            exit 1
+        fi
+
+        sha256=$(nix-prefetch-url "$url" 2>/dev/null)
+
+        printf "$DEPS_TEMPLATE" $package $version $sha256 >&6
+    done
+    cd ..
+done
+
+echo $DEPS_FOOTER >&6
+
+exec 6>&-
+
+nixpkgs-fmt "$deps_file"