git spr panics if a husky pre-push hook exits with exit status 1

Just what it says in the description. I put a little checker in a pre-push hook that looks like this:

echo "Checking if port 3000 is free"

portbusy="$(lsof -i 4tcp:3000 || true)"

if [[ "${#portbusy}" -gt 0 ]]; then
    echo "port 3000 in use, exiting because E2E tests require it to be free"
    exit 1
fi

It works as expected but git spr isn't very happy about it, returning this:

❯ git spr update
> git rev-parse --show-toplevel
> git fetch
> git rebase origin/master --autostash
> github fetch pull requests
> git log --format=medium --no-color origin/master..HEAD
> git branch --no-color
> git log --format=medium --no-color origin/master..HEAD
> git status --porcelain --untracked-files=no
> git push --force --atomic origin 0fbfccffdddb4db5673151a1bd03b1a9c24edce1:refs/heads/spr/master/dfcf08bc 282e88f78ab723f2f5403ea1e30b7be0ec0533e3:refs/heads/spr/master/3b65cc73
git error: Checking if port 3000 is free
port 3000 in use, exiting because E2E tests require it to be free
husky - pre-push hook exited with code 1 (error)
error: failed to push some refs to 'https://github.es.ecg.tools/mobile-de/obs-inventory-node.git'
panic: exit status 1

goroutine 1 [running]:
github.com/ejoffe/spr/git/realgit.(*gitcmd).MustGit(0x14000319b00?, {0x14000348000?, 0x2?}, 0x140000b8480?)
        /Users/runner/work/spr/spr/git/realgit/realcmd.go:44 +0x4c
github.com/ejoffe/spr/spr.(*stackediff).syncCommitStackToGitHub(0x140000ae540, {0x14000167610?, 0x140000bcd5b?}, {0x14000248360, 0x2, 0x102aa008c?}, 0x1400021c190)
        /Users/runner/work/spr/spr/spr/spr.go:556 +0x5b4
github.com/ejoffe/spr/spr.(*stackediff).UpdatePullRequests(0x140000ae540, {0x102f0c4f0?, 0x103229460}, {0x103229460, 0x0, 0x0}, 0x0)
        /Users/runner/work/spr/spr/spr/spr.go:180 +0x790
main.main.func4(0x140000ab0e0?)
        /Users/runner/work/spr/spr/cmd/spr/main.go:161 +0x100
github.com/urfave/cli/v2.(*Command).Run(0x140000ab0e0, 0x140000c43c0)
        /Users/runner/go/pkg/mod/github.com/urfave/cli/v2@v2.8.1/command.go:169 +0x4f8
github.com/urfave/cli/v2.(*App).RunContext(0x14000082340, {0x102f0c4f0?, 0x103229460}, {0x1400001e040, 0x2, 0x2})
        /Users/runner/go/pkg/mod/github.com/urfave/cli/v2@v2.8.1/app.go:341 +0x85c
github.com/urfave/cli/v2.(*App).Run(...)
        /Users/runner/go/pkg/mod/github.com/urfave/cli/v2@v2.8.1/app.go:247
main.main()
        /Users/runner/work/spr/spr/cmd/spr/main.go:230 +0x1208

Expected behavior git spr exits gracefully

ejoffe / spr

git spr panics if a husky pre-push hook exits with exit status 1 #389