1 files changed, 70 insertions, 0 deletions
diff --git a/pkgs/by-name/tr/tradingview/update.sh b/pkgs/by-name/tr/tradingview/update.sh
new file mode 100644
index 00000000000..863521bfde9
--- /dev/null
+++ b/pkgs/by-name/tr/tradingview/update.sh
@@ -0,0 +1,70 @@
+#!/usr/bin/env nix-shell
+#! nix-shell -i bash -p curl jq git gnused gnugrep
+
+#
+# Get latest version of TradingView from Snapcraft.
+#
+
+snap_info=($(
+  curl -s -H 'X-Ubuntu-Series: 16' \
+    'https://api.snapcraft.io/api/v1/snaps/details/tradingview' \
+  | jq --raw-output \
+    '.revision,.download_sha512,.version,.last_updated'
+))
+
+# "revision" is the actual version identifier; "version" is for human consumption.
+revision="${snap_info[0]}"
+sha512="${snap_info[1]}"
+sri=$(nix hash to-sri --type "sha512" $sha512)
+upstream_version="${snap_info[2]}"
+last_updated="${snap_info[3]}"
+
+echo "Latest release is $upstream_version from $last_updated."
+
+#
+# Read the current TradingView version.
+#
+
+nixpkgs="$(git rev-parse --show-toplevel)"
+tradingview_nix="$nixpkgs/pkgs/applications/finance/tradingview/default.nix"
+current_nix_version=$(
+  grep 'version\s*=' "$tradingview_nix" \
+  | sed -Ene 's/.*"(.*)".*/\1/p'
+)
+
+echo "Current nix version: $current_nix_version"
+
+if [[ "$current_nix_version" = "$upstream_version" ]]; then
+  echo "TradingView is already up-to-date"
+  exit 0
+fi
+
+#
+# Find and replace.
+#
+
+echo "Updating from ${current_nix_version} to ${upstream_version}, released ${last_updated}"
+
+sed --regexp-extended \
+  -e 's/revision\s*=\s*"[0-9]+"\s*;/revision = "'"${revision}"'";/' \
+  -e 's/hash\s*=\s*"[^"]*"\s*;/hash = "'"${sri}"'";/' \
+  -e 's/version\s*=\s*".*"\s*;/version = "'"${upstream_version}"'";/' \
+  -i "$tradingview_nix"
+
+#
+# Attempt a build.
+#
+
+export NIXPKGS_ALLOW_UNFREE=1
+
+if ! nix-build -A tradingview "$nixpkgs"; then
+  echo "The updated TradingView failed to build."
+  exit 1
+fi
+
+#
+# Commit changes.
+#
+git add "$tradingview_nix"
+git commit -m "tradingview: ${current_nix_version} -> ${upstream_version}"
+