🐛 Fix package reports on Google Colab (#132)

* 🐛 Fix package reports on Google Colab

* ✅ Fix test

src/pipgrip/pipper.py

@@ -309,9 +309,15 @@ def _get_package_report(
             "--trusted-host",
             urlparse(extra_index_url).hostname,
         ]
-    args += ["--report", "-", package]
+
+    # Windows disallows opening fp a second time (within the pip subprocess)
+    # So close it here, and delete it manually
+    with NamedTemporaryFile(delete=False, mode="w+") as fp:
+        report_file = fp.name
+
+    args += ["--report", report_file, package]
     try:
-        out = stream_bash_command(args)
+        stream_bash_command(args)
     except subprocess.CalledProcessError as err:
         output = getattr(err, "output") or ""
         logger.error(
@@ -320,8 +326,11 @@ def _get_package_report(
             )
         )
         raise RuntimeError("Failed to get report for {}".format(package))
-    report = json.loads(out)
-    return report
+    else:
+        with io.open(report_file, "r", encoding="utf-8") as fp:
+            return json.load(fp)
+    finally:
+        os.remove(report_file)
 
 
 def _download_wheel(

tests/test_pipper.py

@@ -1,3 +1,4 @@
+import json
 import os
 import subprocess
 
@@ -258,7 +259,9 @@ def patch_getcwd():
 )
 def test_get_package_report(package, pip_output, expected, monkeypatch):
     def patch_pip_output(*args, **kwargs):
-        return pip_output
+        file_path = args[0][-2]
+        with open(file_path, "w") as fp:
+            json.dump(json.loads(pip_output), fp)
 
     def patch_getcwd():
         return os.path.expanduser("~")