[milo] Do not assume build has task id

After https://chromium-review.googlesource.com/c/infra/infra/+/1531678/11
a build does not necessarily has a swarming task. It is created
asynchronously.

Display a task link only if task id is known.

R=hinoka@chromium.org

Bug: 943467
Change-Id: I1e2d7c892a5ecc099c0f7bc106ca38d302ff78cd
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-go/+/1536449
Commit-Queue: Nodir Turakulov <nodir@chromium.org>
Auto-Submit: Nodir Turakulov <nodir@chromium.org>
Reviewed-by: Ryan Tseng <hinoka@chromium.org>
5 files changed
tree: c0fbc5b5f4686040b56dca311bc485b1669d216e
  1. appengine/
  2. auth/
  3. buildbucket/
  4. cipd/
  5. client/
  6. common/
  7. config/
  8. cq/
  9. dm/
  10. examples/
  11. gce/
  12. grpc/
  13. hardcoded/
  14. logdog/
  15. luci_notify/
  16. lucicfg/
  17. lucictx/
  18. machine-db/
  19. milo/
  20. mmutex/
  21. mp/
  22. scheduler/
  23. scripts/
  24. server/
  25. starlark/
  26. swarming/
  27. tokenserver/
  28. tools/
  29. tumble/
  30. vpython/
  31. web/
  32. .gitattributes
  33. .travis.yml
  34. AUTHORS
  35. codereview.settings
  36. CONTRIBUTING.md
  37. CONTRIBUTORS
  38. LICENSE
  39. OWNERS
  40. pre-commit-go.yml
  41. PRESUBMIT.py
  42. README.md
README.md

luci-go: LUCI services and tools in Go

GoDoc

Installing

LUCI Go code is meant to be worked on from an Chromium infra.git checkout, which enforces packages versions and Go toolchain version. First get fetch via depot_tools.git then run:

fetch infra
cd infra/go
eval `./env.py`
cd src/go.chromium.org/luci

Contributing

Contributing uses the same flow as Chromium contributions.