My Emacs configuration https://git.cjennings.net/dotemacs/atom?h=main 2026-05-10T19:17:25+00:00 2026-05-10T19:17:25+00:00 Craig Jennings c@cjennings.net 2026-05-10T19:17:25+00:00 urn:sha1:57e558ce13fae77eed07095638a753ba75af55d4 Phase 2.3 of utility-consolidation. `cj/--coverage-git-string' was a generic argv-based runner ("run program, return stdout, raise user-error on non-zero with status+output in the message") trapped inside coverage-core. Lift the generic shape into `cj/process-output-or-error' and add `cj/git-output-or-error' as a one-line wrapper that supplies "git" as the program. Both live in system-lib.el. Future callers I have in mind: reconcile-open-repos shell-style git calls (the high-priority data-safety task), vc-config clipboard cloning, mail integrations that touch git for commit signatures. Six Normal/Boundary/Error tests cover success/no-args/non-zero-exit for the generic runner, the user-error message content (program name, exit status, trimmed output), and the git wrapper's program argument routing. Migrate coverage-core's `cj/--coverage-git-merge-base' and `cj/--coverage-git-diff' to call the new git wrapper. Drop the local `cj/--coverage-git-string' definition. Add `(require \='system-lib)' to coverage-core.el per the Phase 2 exit criterion.