asset loading for integration tests

2 files changed, 50 insertions, 0 deletions

diff --git a/packages/taler-wallet-cli/assets/.gitkeep b/packages/taler-wallet-cli/assets/.gitkeep
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/packages/taler-wallet-cli/assets/.gitkeep
diff --git a/packages/taler-wallet-cli/src/assets.ts b/packages/taler-wallet-cli/src/assets.ts
new file mode 100644
index 000000000..465ee7e80
--- /dev/null
+++ b/packages/taler-wallet-cli/src/assets.ts
@@ -0,0 +1,50 @@
+/*
+ This file is part of GNU Taler
+ (C) 2021 Taler Systems S.A.
+
+ GNU Taler is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+/**
+ * Imports.
+ */
+import path from "path";
+import fs from "fs";
+
+/**
+ * Resolve an asset name into an absolute filename.
+ * 
+ * The asset file should be placed in the "assets" directory
+ * at the top level of the package (i.e. next to package.json).
+ */
+export function resolveAsset(name: string): string | null {
+  const n = __filename;
+  const d = __dirname;
+  let assetPath: string;
+  // Currently both asset paths are the same.
+  // This might change if the file that contains "resolveAsset"
+  // ever moves.  Thus, we're keeping the case distinction.
+  if (n.endsWith("assets.js")) {
+    // We're not bundled.  Path is relative to the current file.
+    assetPath = path.resolve(path.join(d, "..", "assets", name));
+  } else if (n.endsWith("taler-wallet-cli.js")) {
+    // We're bundled.  Currently, this path is the same
+    // FIXME:  Take into account some ASSETS environment variable?
+    assetPath = path.resolve(path.join(d, "..", "assets", name));
+  } else {
+    throw Error("Can't resolve asset (unknown )");
+  }
+  if (!fs.existsSync(assetPath)) {
+    throw Error(`Asset '${name} not found'`);
+  }
+  return assetPath;
+}
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