Add --//some/path:incompatible_some_flag as a valid incompatible flag…

… format (bazelbuild#125)

Closes bazelbuild#118

Ensure that binaries downloaded with BAZELISK_BASE_URL set are put in…

…to mirror-specific cache folders.

FYI @ali5h

Display correct Bazel release which flips a flag (bazelbuild#105)

The script will print "TBD" if the breaking release hasn't been determined yet.

Fixes bazelbuild#104

Inc flags: Display Bazel release and GitHub Issue (bazelbuild#103)

* Display the Bazel version of flags.

Bazelisk now also displays the major Bazel release in which flags are supposed to be flipped.

Required by bazelbuild/continuous-integration#869

* Print 'Bazel' as part of the version string

* Also display the Issue URL for flags

Allow using local Bazel binaries. (bazelbuild#93)

Bazel versions (e.g. in USE_BAZEL_VERSION or .bazelversion) can now
refer to absolute paths on the filesystem. As an added convenience, a
tilde prefix is expanded to the user's home directory.

Example:

```sh
$ USE_BAZEL_VERSION="~/bin/bazel-1.0" bazelisk
```

This would tell Bazelisk to not download any binaries and instead
just directly use the Bazel binary in `$HOME/bin/bazel-1.0`.

Let Bazelisk correctly separate releases and metadata from Bazel forks.

This fixes an issue where Bazelisk would accidentally reuse a cached binary or "latest releases" JSON from fork A, even when the version label refers fork B.

Also make the documentation a bit clearer and remove outdated info from it.

build.sh: Remove old binaries before building new ones.

Fix bazelbuild#61: Do not execute tools/bazel when BAZELISK_SKIP_WRAP…

…PER is set. (bazelbuild#67)

* Fix bazelbuild#61: Do not execute tools/bazel when BAZELISK_SKIP_WRAPPER is set.

Bazelisk will set this environment variable when executing Bazel (or
a wrapper found in <workspace_root>/tools/bazel). This prevents Bazelisk
from executing itself in an infinite loop, in case the wrapper is
Bazelisk or somehow executes Bazelisk.

If you're using a wrapper in <workspace_root>/tools/bazel that downloads
Bazelisk and delegates to it, please set the BAZELISK_SKIP_WRAPPER
environment variable to ensure that Bazelisk directly executes Bazel.

* Skip wrapper delegation tests on Windows

Add support for GitHub auth token (bazelbuild#62)

This adds support for BAZELISK_GITHUB_TOKEN which is a GitHub token used
for API requests when it is set. This fixes the issue of being on a
shared network and getting rate limited when using bazelisk.

Fixes bazelbuild#18

Fixed searching of workspace on Windows. (bazelbuild#56)