Does this work in cmd.exe? I would expect the "\n" to need to be escaped.

That should be handled by csprintf, right?

No -- there's no way to escape a newline in a command on Windows in cmd.exe that we could find.

All the git commit -m ... stuff had to be changed to "write to a temp file; git commit -F tempfile; delete the temp file".

For example, under cmd.exe, can you write a command which echoes "a\nb" (with a literal newline)? The equivalent of this under Bash:

$ echo "a
> b"
a
b
$

We probably should "handle" this better, but I believe the only way we can handle it is by throwing an exception ("Exception: it is not possible to escape a newline on Windows...").

Windows is so awesome it doesn't need newlines. Oh wait, it sucks!

I can't test this immediately but will push an update when I'm at my windows pc.

Haha, sounds good. If I'm right and this is janky, I expect either using single quotes (so \n is not interpreted at the PHP level) or writing \\n will work; either will pass literal \n to Mercurial and cause it to print out a newline.

This time I was smart enough to test it with a merge commit. The result looked okay to me.

Before:

array(3) {
  [0] =>
  string(41) "'0a543949243c9ad6e92f24d018b6a0674c457eb8"
  [1] =>
  string(42) "''ce4e941d2d8befacef926e0358d743db39b386e2"
  [2] =>
  string(1) "'"
}

After:

array(2) {
  [0] =>
  string(40) "0a543949243c9ad6e92f24d018b6a0674c457eb8"
  [1] =>
  string(40) "ce4e941d2d8befacef926e0358d743db39b386e2"
}

Does something like this work instead? I like separating out the parameter...

$futures[$node] = $this->execFutureLocal(
  'parents --template %s --rev %s',
  '{node}\n',
  $node);