ethanlin01x opened a new issue, #3791:
URL: https://github.com/apache/iggy/issues/3791
### Bug description
The examples CI job reports success for the Rust and C# preflight without
executing a single CLI command from the root README.
Both preflights (`scripts/run-examples-from-readme.sh:188`, `:350`) extract
CLI commands with:
```bash
run_readme_commands "README.md" '^\`cargo r --bin iggy -- '
```
Two independent bugs stack here:
1. **Stale literal.** The README uses `cargo run --bin iggy -- ...`, not
`cargo r`, so the pattern matches nothing on any grep.
2. **GNU grep anchor.** In GNU grep ERE, `` \` `` is a buffer-start anchor,
not a literal backtick. Even with the literal fixed, `` ^\` `` requires line
start *and* buffer start, so only line 1 could ever match: the corrected
pattern matches 9 lines with BSD grep but 0 with GNU grep — and CI runs on
Linux.
`run_readme_commands` (`scripts/utils.sh:305`) silently returns on zero
matches, so both preflights pass green. As a result the 9 CLI commands in the
README (stream create/list/get, topic create/list/get, message send ×2, message
poll) are never exercised, and no other CI check covers them.
### Affected area / component
CI / build / tooling
### Deployment
Not applicable
### Versions
_No response_
### Hardware / environment
_No response_
### Sample code
```bash
# GNU grep (Linux/CI): current pattern and literal-fixed pattern both match 0
$ docker run --rm -v "$PWD/README.md:/README.md:ro" debian:stable-slim bash
-c "
grep -cE '^\\\`cargo r --bin iggy -- ' /README.md
grep -cE '^\\\`cargo run --bin iggy -- ' /README.md
grep -cE '^[\\\`]cargo run --bin iggy -- ' /README.md"
0
0
9
```
### Logs
_No response_
### Iggy server config
_No response_
### Reproduction
Run `./scripts/run-examples-from-readme.sh --language rust --skip-tls` on
Linux: the preflight completes without printing a single `Checking command from
README.md:` line for the CLI commands.
### Contribution
- [x] I'm willing to submit a pull request to fix this bug
### Good first issue
- [ ] I think this could be a good first issue for a new contributor
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