Read 2026-11-07
etar-group/etar-calendar: technical due diligence, read from its repository
What Borehole read in etar-group/etar-calendar's code and history at e4c805b: its licence, security advisories, releases, review practice, tests, dependencies and operations. Every finding cites the file and line it rests on. The full report also covers the team and asks the questions the code cannot answer.
| Dimension | Rating |
|---|---|
| Architecture & Codebase — including AI provenance | strong |
| Engineering Process & SDLC Maturity | adequate |
| Product & Engineering Maturity | not assessable |
| Security & Reliability Posture | strong |
| Observability & Operations | not assessable |
| Fit with the Acquirer | not assessable |
What the repository says
LICENSE: Relicensed: Apache-2.0 → GPL-3.0 (2020-01-07)
Architecture & Codebase — including AI provenance
strongCommit messages are templated rather than written
adequate37% of commit subjects are exact repeats of another subject, and subject length varies by only 30.3 characters. A log written by someone explaining their reasoning to a future reader does not look like this. The log is therefore weak evidence of intent, whatever the code is like.
| 307× 'Import translations. DO NOT MERGE' |
| 68× 'Import revised translations. DO NOT MERGE' |
| 58× 'Translated using Weblate (Spanish)' |
app/src/main/java/com/android/calendar/DayView.java is 5,140 lines, 26× this codebase's median file
adequateThe median source file here is 197 lines. 4 files exceed 1,970 lines, the largest being 5,140. Size is not a defect on its own — some problems genuinely live in one place — but these are where merge conflicts, review fatigue and single-owner knowledge concentrate, and they are the first thing that slows an inheriting engineer down.
app/src/main/java/com/android/calendar/DayView.java:1 — 5,140 lines (26× median) |
app/src/main/java/com/android/calendar/chips/RecipientEditTextView.java:1 — 3,498 lines (17× median) |
app/src/main/java/com/android/calendar/EventInfoFragment.java:1 — 2,609 lines (13× median) |
app/src/main/java/com/android/calendar/Utils.java:1 — 2,324 lines (11× median) |
Engineering Process & SDLC Maturity
adequateTests cover a thin slice of the codebase
adequate14 test files against 184 source files (7.6%). This does not measure whether the tests are good, only whether enough of them exist for the codebase to be changed safely by someone who did not write it — which is exactly the situation after an acquisition.
| 14 test files / 184 source files |
Almost no process scaffolding exists in the repository
adequateOf five ordinary markers — CI workflows, CODEOWNERS, a pull-request template, pre-commit hooks, contribution guidance — 1 is present: CI workflows. Branch protection itself is a GitHub setting rather than a file, so this is a reading of proxies and not of the rules themselves. What it does establish is that the process is not written down anywhere a new engineer would find it.
| 1 of 5 markers present across 1,991 tracked files |
Product & Engineering Maturity
not assessableNot rated: only 8 of 19 checks could reach a conclusion here; the rest do not apply to this repository or could not read it.
Security & Reliability Posture
strongRelicensed: Apache-2.0 → GPL-3.0 (2020-01-07)
adequateThe root licence changed 1 time(s). The latest terms restrict what users, hosts or a buyer may do in ways the earlier ones did not. Code taken under the old terms stays under them, so both matter in diligence.
Observability & Operations
not assessableNot rated: only 5 of 16 checks could reach a conclusion here; the rest do not apply to this repository or could not read it.
Fit with the Acquirer
not assessableNot rated: structurally not assessable from a repository.
Read more, or read your own
The full report on etar-group/etar-calendar: every dimension, the questions for the room, and the audit log.
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