[isolated] Follow symbolic links in files

Bug: 917604
Test: The following was done
```
mkdir a
echo 'foo' > a/source
mkdir b
ln -s ../a/source b/link
isolated archive -I https://isolateserver.appspot.com -namespace default-gzip -files $CWD/b:link
```
At HEAD: https://isolateserver.appspot.com/browse?namespace=default-gzip&digest=dcdb41730f584e42fc101c11bd00ad7dfc5a10cd
With this change: https://isolateserver.appspot.com/browse?namespace=default-gzip&digest=f54ad05e5f19414626c74218e808edcef11088dc

Change-Id: Iad484b29e1ac9edfdb3f2cfb3c9f2adff8506ba9
Reviewed-on: https://chromium-review.googlesource.com/c/1394248
Commit-Queue: Marc-Antoine Ruel <maruel@chromium.org>
Reviewed-by: Marc-Antoine Ruel <maruel@chromium.org>
2 files changed
tree: dc84f7e2c1f22fe5381d71965093de85012d29ce
  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. infra/
  15. logdog/
  16. luci_notify/
  17. lucicfg/
  18. lucictx/
  19. machine-db/
  20. milo/
  21. mmutex/
  22. mp/
  23. scheduler/
  24. scripts/
  25. server/
  26. starlark/
  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.