Resolve an unsatisfiable set of pinned dependencies

1. 0bashexit 0281 ms$0.00306/34 tok18:43:54.691

   Reproduce the failure and read the resolver's explanation of the conflict.

   bash commandno wrap

   cat requirements.txt && sh check.sh 2>&1 | tail -25

   outputwrap

   # Pinned by hand during an incident and never revisited.
   # Install offline from the vendored wheelhouse:
   #   pip install --no-index --find-links wheelhouse -r requirements.txt
   plugina==2.0.0
   pluginb==1.0.0
   libcore==1.4.0
   resolving requirements offline...
   ERROR: Cannot install -r requirements.txt (line 4) and libcore==1.4.0 because these package versions have conflicting dependencies.
   ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts
   

   10 lines, 525 B

2. 1bashexit 031 ms$0.00532/22 tok18:43:54.722

   See which versions actually exist. This is the constraint set.

   bash commandno wrap

   ls wheelhouse/

   outputwrap

   libcore-1.4.0-py3-none-any.whl
   libcore-2.1.0-py3-none-any.whl
   plugina-1.0.0-py3-none-any.whl
   plugina-2.0.0-py3-none-any.whl
   pluginb-1.0.0-py3-none-any.whl
   pluginb-3.0.0-py3-none-any.whl
   

   7 lines, 186 B

3. 2bashexit 0140 ms$0.00661/117 tok18:43:54.864

   Read each wheel's requirements. plugina 2.0.0 and pluginb 3.0.0 both want the 2.x core; plugina 1.0.0 and pluginb 1.0.0 both want 1.x.

   bash commandno wrap

   for w in wheelhouse/*.whl; do echo "== $w"; python -c "import zipfile,sys; z=zipfile.ZipFile(sys.argv[1]); print([n for n in z.namelist() if n.endswith(\"METADATA\")][0]); print(z.read([n for n in z.namelist() if n.endswith(\"METADATA\")][0]).decode())" "$w" | grep -E "^(Name|Version|Requires-Dist)"; done

   outputwrapexpand 23 lines

   == wheelhouse/libcore-1.4.0-py3-none-any.whl
   Name: libcore
   Version: 1.4.0
   == wheelhouse/libcore-2.1.0-py3-none-any.whl
   Name: libcore
   Version: 2.1.0
   == wheelhouse/plugina-1.0.0-py3-none-any.whl
   Name: plugina
   Version: 1.0.0
   Requires-Dist: libcore>=1.0,<2.0
   == wheelhouse/plugina-2.0.0-py3-none-any.whl
   Name: plugina
   Version: 2.0.0
   Requires-Dist: libcore>=2.0,<3.0
   == wheelhouse/pluginb-1.0.0-py3-none-any.whl
   Name: pluginb

   showing 16 of 23 lines

4. 3bashexit 031 ms$0.00995/54 tok18:43:54.895

   Check which API the application actually uses before choosing a direction. slug and export_with_ids exist only in the 2.x line, so downgrading is not an option.

   bash commandno wrap

   grep -n "slug\|export_with_ids" app.py

   outputwrap

   3:Uses the reporting plugin for titles and slugs, and the export plugin for normalised
   22:    for text, identifier in pluginb.export_with_ids(ROWS):
   23:        lines.append(f"{identifier}  {text}  ({plugina.slug(text)})")
   

   4 lines, 222 B

5. 4write_fileno exit code16 ms$0.001165/115 tok18:43:54.899

   Move the whole set forward together, with the reason written down.

   contentwrap

   # Pinned to the versions built against the 2.x core. app.py uses plugina.slug and
   # pluginb.export_with_ids, neither of which exists in the 1.x line, so the whole
   # set has to move forward together rather than the core moving back.
   #   pip install --no-index --find-links wheelhouse -r requirements.txt
   plugina==2.0.0
   pluginb==3.0.0
   libcore==2.1.0
   

   8 lines, 348 B

   argumentswrap

   {
     "path": "requirements.txt"
   }

   3 lines, 32 B

   outputwrap

   Wrote 348 bytes (8 lines) to requirements.txt.

6. 5bashexit 0264 ms$0.001353/20 tok18:43:55.173

   Confirm the requirements resolve and the application runs.

   bash commandno wrap

   sh check.sh

   outputwrap

   resolving requirements offline...
   running the application...
   # Quarterly Report
   b63c3f9a2d9f  quarterly revenue  (quarterly-revenue-b63c3f9a2d9f)
   6009ff0dd2ef  customer churn  (customer-churn-6009ff0dd2ef)
   a419f8580cee  net promoter score  (net-promoter-score-a419f8580cee)
   

   7 lines, 274 B

7. 6bashexit 031 ms$0.001502/26 tok18:43:55.204

   Confirm nothing else was touched.

   bash commandno wrap

   git diff --stat 2>/dev/null || echo "no git repository"

   outputwrap

   no git repository
   

   2 lines, 18 B

8. 7finishno exit code0 ms$0.001592/120 tok18:43:55.204

   State why the set moved forward rather than the core moving back.

   summarywrap

   requirements.txt pinned plugina 2.0.0 (needs libcore 2.x) alongside pluginb 1.0.0 and libcore 1.4.0 (both 1.x), which is unsatisfiable. app.py calls plugina.slug and pluginb.export_with_ids, which exist only in the versions built against the 2.x core, so the resolution was to move the whole set forward: plugina 2.0.0, pluginb 3.0.0, libcore 2.1.0. check.sh passes and only requirements.txt changed.
   

   2 lines, 401 B

   outputwrap

   Run ended by the agent.

8 steps6 commands0 schema violations0 failed commands0 destructive attempts