test/integration/deps: add script: get-postfixed-pouchdb-build (#8622)

Author: alxndrsn

tests/integration/deps/get-postfixed-pouchdb-build.sh

@@ -0,0 +1,33 @@
+#!/bin/bash -eu
+
+# Download a pouchdb production build for testing inter-version migrations in
+# tests/integration/browser.migration.js
+
+log() {
+  echo "[get-postfixed-pouchdb-build] $*"
+}
+
+# Recently, postfixed JS files have been added in minified form.
+infix=".min"
+while [[ $# -gt 1 ]]; do
+  if [[ $1 = --no-minify ]]; then
+    infix=""
+  else
+    echo "!!! Unrecognised arg: $1"
+    exit 1
+  fi
+  shift
+done
+
+version="$1"
+target="./pouchdb-$version-postfixed.js"
+nodots="$(tr -d . <<<"$version")"
+tmp="$(mktemp)"
+
+log "Fetching minified pouch build..."
+wget "https://github.com/pouchdb/pouchdb/releases/download/$version/pouchdb-${version}${infix}.js" --output-document="$tmp"
+
+log "Converting globals..."
+sed "s/PouchDB/PouchDBVersion$nodots/g" "$tmp" > "$target"
+
+log "Completed OK."