Bunch of random strings somewhat related to your proposal:
Build:
* Assuming loaded source DB (during distribution build)
* Source query:
pkg:gnome-keyring[@fgit='3f7ff7']//cfunc:gkm_rpc_log/trans-calls::*/arg:line/c:string/string()
(All string "line" [1] literals used in calls (direct and
transitive) to gkm_rpc_log [**])
* Filling the err-message grammar (snippet from [3]):
err-message = "WARNING: " "gnome-keyring" ":: " (
...
| "couldn't secure socket: " everything
| "couldn't connect to: " everything ": " everything
| "couldn't send socket credentials: " everything
...
)
(the grammar is needed for parsing the user input for points 1st
and 3rd of your note (see also [***] alternative))
Runtime:
* parse the user/service query "WARNING: gnome-keyring:: couldn...":
applying the above gremmar and rendering part of the syntax tree in
response.
Kind Regards,
Alek
[*] Let's forget for a minute about the fact of hundreds different
patters in the whole codebase, let's pretend that we have to handle just
the sample error message from your propsal ;-)
[**] Imaginary xpath/xquery-like language for code queries ([4,5,6] -
leading large scale implementation AFAIK):
pkg: pacakges namespace
3f7ff7: 3f7ff7289907d2a27912909e63908eadb16d97bf == 3.2.1-3: Current
F16 git for gnome-keyring - implies upstream 6d5818 [2]
cfunc: C functions namespace
trans-calls: transitive calls axis (like ancestor-or-self but for
"calling" relation instead of "nesting" tree relation)
arg: argument names namespace
c: C language constructs namespace
string(): in xpath string() function tries to convert the context
tree node to string scalar
[***] Less elegant, but also less complicated (we do not need grammar
and parsing, but just code-point _key_ matching) option is to convince
Tomas to include build instrumentation in the spec (David's gcc plugin
based in case of gnome-keyring) for hard error messages pre-enumeration
with the following effect:
[3] L250 becomes: "[FGKR0TK] couldn't secure socket: %s"
[3] L256 becomes: "[FGKR0TL] couldn't connect to: %s: %s"
[3] L262 becomes: "[FGKR0TM] couldn't send socket credentials: %s"
[1]
http://git.gnome.org/browse/gnome-keyring/tree/pkcs11/rpc-layer/gkm-rpc-dispatch.c?id=6d5818#n72
[2]
http://git.gnome.org/browse/gnome-keyring/tree/?id=6d58181fcddc5c13762a1920a464787ebc27d4bc
[3]
http://git.gnome.org/browse/gnome-keyring/tree/pkcs11/rpc-layer/gkm-rpc-module.c?id=6d5818#n246
[4]
http://www.lug-erding.de/vortrag/Purely%20Relational%20XQuery%20LUG%20Erding.pdf
[5] http://hackage.haskell.org/package/Pathfinder
[6]
http://dev.monetdb.org/hg/MonetDB/file/f7d6c302cc9c/pathfinder/compiler/algebra/algebra.c
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