Packages without version number no longer map to snapshot

[Quuxplusone]

Bugzilla Link	PR40477
Status	NEW
Importance	P normal
Reported by	Kim Gräsman (kim.grasman@gmail.com)
Reported on	2019-01-26 04:11:13 -0800
Last modified on	2020-03-09 12:35:13 -0700
Version	unspecified
Hardware	All Linux
CC	llvm-bugs@lists.llvm.org, williambbradley@gmail.com
Fixed by commit(s)
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We use Travis for CI builds, and rely on their llvm-toolchain-trusty source.

I'm not entirely sure how that's wired, but ever since the LLVM/Clang 8 branch was made and trunk switched to 9, installing e.g. clang no longer works:

https://travis-ci.org/include-what-you-use/include-what-you-use/builds/483638279?utm_source=github_status&utm_medium=notification

So it looks like something needs to be done to make the default packages point back to the -snapshot builds for trunk/master.

Thanks for any ideas!

[Quuxplusone]

This looks like it's working for the most important packages now (llvm-dev,
libclang-dev and clang).

Some ancillary packages (llvm-11-tools, *-11-examples, etc) still don't have
any snapshot packages to track them. Here's a dump of all 'Package:' lines in
https://apt.llvm.org/xenial/dists/llvm-toolchain-xenial/main/binary-amd64/Packages:

--
48 matches for "Package: " in buffer: Packages
      1:Package: clang
     27:Package: clang-11
     53:Package: clang-11-doc
     78:Package: clang-11-examples
    102:Package: clang-format
    130:Package: clang-format-11
    157:Package: clang-tidy
    183:Package: clang-tidy-11
    204:Package: clang-tools-11
    229:Package: clangd
    257:Package: clangd-11
    282:Package: libc++-11-dev
    315:Package: libc++1-11
    349:Package: libc++abi-11-dev
    378:Package: libc++abi1-11
    407:Package: libclang-11-dev
    433:Package: libclang-common-11-dev
    459:Package: libclang-cpp11
    490:Package: libclang-cpp11-dev
    526:Package: libclang-dev
    551:Package: libclang1
    582:Package: libclang1-11
    613:Package: libfuzzer-11-dev
    644:Package: liblld-11
    666:Package: liblld-11-dev
    688:Package: liblldb-11
    710:Package: liblldb-11-dev
    732:Package: libllvm-11-ocaml-dev
    766:Package: libllvm-ocaml-dev
    787:Package: libllvm11
    810:Package: libomp-11-dev
    835:Package: libomp-11-doc
    859:Package: libomp5-11
    884:Package: lld
    903:Package: lld-11
    923:Package: lldb
    944:Package: lldb-11
    964:Package: llvm
    985:Package: llvm-11
   1025:Package: llvm-11-dev
   1056:Package: llvm-11-doc
   1086:Package: llvm-11-examples
   1117:Package: llvm-11-runtime
   1148:Package: llvm-11-tools
   1178:Package: llvm-dev
   1199:Package: llvm-runtime
   1220:Package: python3-clang-11
   1248:Package: python3-lldb-11
--

Not sure if there's any intentional discrimination, or if some of them just
don't have snapshot versions?

If the former, feel free to close this as fixed as of llvm-11. Thanks!

[Quuxplusone]

Ah, and to clarify, we no longer use Travis' llvm-toolchain-trusty, but use the apt.llvm.org packaging directly.