chore: merge jquery-form history into third-party/projects/

[wincent]

Just a draft PR to see if CI likes the merge here.

This is for #394 — if CI is good, I'll push directly to master (no merge commit) and then apply the patch on top of there.

Details (from third-to-last commit) follow:

---

chore: merge jquery-form history into third-party/projects/

In service of #394.

Basically, we want to pull in the code from this third-party project (which is mostly on life-support at this point) and apply a small patch on top. We don't anticipate having to change it much, if ever, so we are sticking it under "third-party/projects/" and we won't cover it with our normal linting/formatting/testing.

Note that because everything else in the repo pulls in history via subtree merge, doing it here as well. That way if we ever need to git blame in here we'll have something useful to look at.

Note also that in liferay-portal we are using v3.51 of this plugin and have no plans to switch to the latest (v4.3.0) at this time, but I am still pulling in and re-writing all of the tags so that we can easily merge the newer stuff in in the future if we want to.

Steps follow.

Grab the code:

git remote add -f jquery-form https://github.com/jquery-form/form.git

Make directory for it. Note that it is going to live at "third-party/projects/jquery-form/" and not "third-party/jquery-form/"; we want to reserve the top-level inside of "third-party/" for any future tooling that we might want to share across projects, or any common READMEs or other docs:

mkdir -p third-party/projects

Create annotated tags seeing as all the tags in the project are unannotated:

for TAG in \
  3.25.0-2013.01.18 \
  3.32.0-2013.04.09 \
  3.36 \
  3.37.0 \
  3.45.0 \
  3.46.0 \
  3.49 \
  3.50 \
  3.51; do
  git tag -f -a -m jquery-form/v$TAG $TAG $TAG
done

for TAG in \
  v3.19 \
  v4.0.0 \
  v4.0.1 \
  v4.1.0 \
  v4.2.0 \
  v4.2.1 \
  v4.2.2 \
  v4.3.0; do
  git tag -f -a -m jquery-form/$TAG $TAG $TAG
done

Rewrite tags to have a prefix. First tags starting with "v" and then those without a leading "v":

support/filter-tags.sh jquery-form/master 'sed "s#^v#jquery-form/v#"'
support/filter-tags.sh jquery-form/master 'sed "s#^\([0-9]\)#jquery-form/v\1#"'

Do the actual subtree merge:

git merge -s ours --no-commit --allow-unrelated-histories jquery-form/v3.51
git read-tree --prefix=third-party/projects/jquery-form -u jquery-form/v3.51
git commit -m 'chore: merge jquery-form history into third-party/projects/'

Make sure shape of DAG is sane:

git log --oneline --decorate --graph --all

Push rewritten tags so that entire history will be reachable/explorable:

git push upstream-rw --tags --dry-run
git push upstream-rw --tags

Kill temporary remote that was added earlier. We don't want this lying around because a careless fetch could pull down all the tags that we don't want (because they aren't prefixed, or annotated, or even consistent), and it is all too easy to accidentally contaminate the upstream with these tags by a push. If we ever need to resync with upstream history again, we can just re-add the remote:

git remote remove jquery-form

Amend commit to make these notes that you're reading now:

git commit --amend

[wincent]

Semantic PR failure is expected (because of old commit messages), but all the others are green, so yay. Going to push a couple small README/doc fixes on top of this, but I think we're good. Closing this draft for now.