## Problem
`coder exp sync want` and `coder exp sync start` both printed generic
success messages, which hid the dependency units involved in startup
coordination.
Before, declaring dependencies with `sync want` printed:
```text
Success
```
Before, `sync start` printed while waiting, then finished with another
generic success message:
```text
Waiting for dependencies of unit 'test-unit' to be satisfied...
Success
```
## Solution
Print the dependency units in both cases, using wording that matches
where the command is in the lifecycle.
After, `sync want` prints the dependencies it declared for the unit:
```text
Unit "test-unit" declared dependencies: [dep-unit]
```
After, `sync start` enumerates the dependencies while it is waiting,
then prints the same dependencies after the unit starts executing:
```text
Unit "test-unit" is waiting for dependencies to be satisfied: [dep-unit, dep-unit-2]
Unit "test-unit" finished waiting for dependencies: [dep-unit, dep-unit-2]
```
The sync golden tests now cover the updated output, including multiple
dependencies for `sync start`.
closes: https://github.com/coder/coder/issues/10352
closes: https://github.com/coder/internal/issues/1094
closes: https://github.com/coder/internal/issues/1095
In this pull request, we enable a new set of experimental cli commands
grouped under `coder exp sync`.
These commands allow any process acting within a coder workspace to
inform the coder agent of its requirements and execution progress. The
coder agent will then relay this information to other processes that
have subscribed.
These commands are:
```
# Check if this feature is enabled in your environment
coder exp sync ping
# express that your unit depends on another
coder exp sync want <unit> <dependency_unit>
# express that your unit intends to start a portion of the script that requires
# other units to have completed first. This command blocks until all dependencies have been met
coder exp sync start <unit>
# express that your unit has completes its work, allowing dependent units to begin their execution
coder exp sync complete <unit>
```
Example:
In order to automatically run claude code in a new workspace, it must
first have a git repository cloned. The scripts responsible for cloning
the repository and for running claude code would coordinate in the
following way:
```bash
# Script A: Claude code
# Inform the agent that the claude script wants the git script.
# That is, the git script must have completed before the claude script can begin its execution
coder exp sync want claude git
# Inform the agent that we would now like to begin execution of claude.
# This command will block until the git script (and any other defined dependencies)
# have completed
coder exp sync start claude
# Now we run claude code and any other commands we need
claude ...
# Once our script has completed, we inform the agent, so that any scripts that depend on this one
# may begin their execution
coder exp sync complete claude
```
```bash
# Script B: Git
# Because the git script does not have any dependencies, we can simply inform the agent that we
# intend to start
coder exp sync start git
git clone ssh://git@github.com/coder/coder
# Once the repository have been cloned, we inform the agent that this script is complete, so that
# scripts that depend on it may begin their execution.
coder exp sync complete git
```
Notes:
* Unit names (ie. `claude` and `git`) given as input to the sync
commands are arbitrary strings. You do not have to conform to specific
identifiers. We recommend naming your scripts descriptively, but
succinctly.
* Scripts unit names should be well documented. Other scripts will need
to know the names you've chosen in order to depend on yours. Therefore,
you
---------
Co-authored-by: Mathias Fredriksson <mafredri@gmail.com>
Max Schwenk