[PATCH 12/16] t5551: drop curl trace lines without headers

We pick apart a curl trace, looking for "=> Send header:" and so on, and matching against an expected set of requests and responses. We remove "== Info" lines entirely. However, our parser is fooled when running the test with LIB_HTTPD_SSL on Ubuntu 20.04 (as found in our linux-gcc CI job), as curl hands us an "Info" buffer with a newline, and we get:

  == Info: successfully set certificate verify locations:
  == Info:   CAfile: /etc/ssl/certs/ca-certificates.crt
    CApath: /etc/ssl/certs
  => Send SSL data[...]

which results in the "CApath" line ending up in the cleaned-up output, causing the test to fail.

Arguably the tracing code should detect this and put it on two separate "== Info" lines. But this is actually a curl bug, fixed by their 80d73bcca (tls: provide the CApath verbose log on its own line, 2020-08-18). It's simpler to just work around it here.

Since we are using GIT_TRACE_CURL, every line should just start with one of "<=", "==", or "=>", and we can throw away anything else. In fact, we can just replace the pattern for deleting "*" lines. Those were from the old GIT_CURL_VERBOSE output, but we switched over in 14e24114d9 (t5551-http-fetch-smart.sh: use the GIT_TRACE_CURL environment var, 2016-09-05).

Signed-off-by: Jeff King <peff@peff.net>
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 t/t5551-http-fetch-smart.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)