fix: do not fail if no results using GNU `xargs`

cgrindel commented 10 months ago

Added -r flag to xargs to ensure that the specified command does not run if there are no results in stdin.
Use -I {} with xargs to be cross-platform compatible. This ensures that the command will execute for each result.
Add -S 511 to xargs to ensure that xargs does not fail with xargs: command line cannot be assembled, too long if the paths are very long. The default command length for xargs is 255.
Beefed up the unit tests for find_child_workspace_packages.

Closes #189.

cgrindel commented 10 months ago

cc: @mingp @rickeylev

rickeylev commented 10 months ago

Thanks! This is some fun bash and shell scripting :sweat_smile:

bazel-contrib / rules_bazel_integration_test