// so we allocate immediately, but defer release.
// On commit we best-effort release the deferred releases.
// On rollback we best-effort release any allocations we did.
//
// Pattern for use:
//
//	op := StartPortAllocationOperation(...)
//	defer op.Finish
//	...
//	write(updatedOwner)
//
// /  op.Commit()
type PortAllocationOperation struct {
	pa              Interface
	allocated       []int

env GIT_AUTHOR_DATE=2022-07-19T11:07:00-04:00
exec git add go.mod issue53955.go
exec git commit -m 'initial commit'
exec git branch -m main
exec git tag v1.0.9

env GIT_COMMITTER_DATE=2022-07-19T11:07:01-04:00
env GIT_AUTHOR_DATE=2022-07-19T11:07:01-04:00
exec git add extra.go
exec git commit -m 'next commit'
exec git show-ref --tags --heads
cmp stdout $WORK/.git-refs-1

cd $WORK/m

        """
        repoC.file("build.gradle") << """
            dependencies { implementation "test:test:1.2" }
        """
        repoC.commit("initial version")
        repoC.createLightWeightTag("1.2")

        dependency(dependencyName)
        repoB.commit("initial version")
        repoB.createLightWeightTag("1.2")

        when:
        fails(":assemble")

        then:

        val rootProjectDir = project.repoRoot().asFile.absolutePath
        val commit = commitBaseline.map { it.substring(it.lastIndexOf('-') + 1) }
        val checkoutDir = RemoteProject.checkout(fsOps, execOps, rootProjectDir, commit.get(), temporaryDir)

        tryBuildDistribution(checkoutDir)
        copyToFinalDestination(checkoutDir)

        println("Building the commit distribution in $checkoutDir succeeded, now the baseline is ${commitBaseline.get()}")

at 2022-02-23T13:48:02-05:00
git add README.txt
git commit -m 'initial state'
git branch -m main
git tag 'v2.0.0+incompatible'

at 2022-02-23T13:48:35-05:00
git rm -r README.txt
git add go.mod
git commit -m 'migrate to Go modules'
git tag 'v0.1.0+build-metadata'

at 2022-02-23T14:41:55-05:00
git branch v3-dev
git checkout v3-dev
cp v3/go.mod go.mod
git commit go.mod -m 'update to /v3'

```
λ git branch -m RELEASE.2021-04-22T15-44-28Z.hotfix
λ git push -u upstream RELEASE.2021-04-22T15-44-28Z.hotfix
```

Pick the relevant commit-id say for example commit-id from the master branch

```
commit 4f3317effea38c203c358af9cb5ce3c0e4173976
Author: Klaus Post <******@****.***>
Date:   Mon Nov 8 08:41:27 2021 -0800

    Close stream on panic (#13605)

env GO111MODULE=on
env GOPROXY=direct
env GOSUMDB=off
[!net:golang.org] skip
[!git] skip

# fetch commit hash reachable from refs/heads/* and refs/tags/* is OK
go list -m golang.org/x/time@8be79e1e0910c292df4e79c241bb7e8f7e725959 # on master branch

# fetch other commit hash, even with a non-standard ref, is not OK
! go list -m golang.org/x/time@334d83c35137ac2b376c1dc3e4c7733791855a3a # refs/changes/24/41624/3
stderr 'unknown revision'

env GIT_COMMITTER_EMAIL=$GIT_AUTHOR_EMAIL

at 2019-05-09T18:56:25-04:00

git init

git add go.mod tagtests.go
git commit -m 'create module tagtests'
git branch -m master
git branch b

git add v0.2.1
git commit -m 'v0.2.1'
git tag 'v0.2.1'

git checkout b
git add 'v0.2.2'
git commit -m 'v0.2.2'
git tag 'v0.2.2'

git checkout master
git merge b -m 'merge'

git show-ref --tags --heads

func (tl traceLocker) SpanExists(s *mspan) {
	tl.eventWriter(traceGoRunning, traceProcRunning).commit(traceEvSpan, traceSpanID(s), traceArg(s.npages), traceSpanTypeAndClass(s))
}

// SpanAlloc records an event indicating that the span has just been allocated.
func (tl traceLocker) SpanAlloc(s *mspan) {
	tl.eventWriter(traceGoRunning, traceProcRunning).commit(traceEvSpanAlloc, traceSpanID(s), traceArg(s.npages), traceSpanTypeAndClass(s))
}

       pulling in other changes.
 - [ ] Each commit in the pull request should have a meaningful subject line and body.
 - [ ] Format the pull request title like `[MNG-XXX] SUMMARY`,
       where you replace `MNG-XXX` and `SUMMARY` with the appropriate JIRA issue.
 - [ ] Also format the first line of the commit message like `[MNG-XXX] SUMMARY`.