cli / cli

Add PowerShell instructions to completions help

Extensions UI tweaks

This is because we have an `upgrade` command, not `update` command.

Rename `gh extensions` → `gh extension`

Rework local extensions for Windows

Repo sync optimizations

This is for compatibility with other core commands which are all singular.

Check path for git executable before auth

There was a bug where if git was not installed then gh would do its
authentication and try to configure git but would then find out that the
git executable was not in PATH.

Now gh checks to see if the git executable is in PATH before
authenticating the user. If the git executable is in PATH the
authentication continues as normal, if it is not in PATH then it prints
out an error to the console:

$ git executable not found in $PATH

Resolves: #3818

add --discussion-category flag to release cmd

Only add discussion category to request if there is one. This eliminates
the need to update old tests.

Renaming the variable to something shorter.

In other cases, we don't have to abort the operation since it can
proceed without being affected by the working copy at all.

- If the local branch already exists, use `git update-ref`
- If it needs to be created, use `git branch <newbranch>`, but don't
  switch to the new branch

Bonus fixes
- Enables operation while on detached HEAD
- Enables operation even when the current remote doesn't track all
  branches in the remote repo (uses FETCH_HEAD instead of the
  `<remote>/<branch>` syntax)

Add repo sync command

add --branch flag to pr checkout

Allows renaming the checked out branch.

Fix unmarshalling GraphQL error type

The "path" field of a GraphQL error object contains a mix of strings and
numbers and cannot be deserialized into `[]string`. Fortunately, we
don't need to rely on the "path" field and instead have the final error
message be constructed by aggregating human-readable "message" fields.

Disable colorizing labels in `issue list` output

Fixes #4084: Enable completion descriptions for powershell

Signed-off-by: Marc Khouzam <marc.khouzam@gmail.com>

https://github.com/cli/cli/pull/4051/checks?check_run_id=3186063173

- Labels with dark color are not visible on a dark background
- "Raw" `issue view` output should never output color, not even with
  CLICOLOR_FORCE=1