Summary:
- Provide a "--json" flag for "arc upload"
- Unify some of the stderr stuff across upload/download/paste.
Test Plan:
- Ran "arc upload" and "arc upload --json", piped stderr away with 2>/dev/null
to verify only JSON got emitted to stdout
- Ran "arc paste"
Reviewed By: codeblock
Reviewers: codeblock, jungejason, tuomaspelkonen, aran
CC: aran, codeblock
Differential Revision: 749
Summary: Read and write in the same workflow! Dogs and cats living together!
Test Plan: - Performed a bunch of paste reads and writes and they looked ok?
Reviewed By: aran
Reviewers: codeblock, jungejason, tuomaspelkonen, aran
CC: aran
Differential Revision: 748
