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A previous change to replace `SyncVar.set` with `SyncVar.put`
breaks things.
This commit tweaks the thread synchronizing in `sys.process`
to actually use `SyncVar` to sync and pass a var.
Joining the thread about to exit is superfluous.
A result is put exactly once, and consumers use
non-destructive `get`.
Note that as usual, avoid kicking off threads in a static
context, since class loading cycles are somewhat dicier
with 2.12 lambdas. In particular, REPL is a static context
by default.
SI-10007 Clarify deprecation message
The message on `set` was self-fulfilling, as it didn't
hint that `put` has different semantics.
So explain why `put` helps avoid errors instead of
creating them.
SI-10007 Always set exit value
Always put a value to exit code, defaulting to None.
Also clean up around tuple change to unfortunately
named Future.apply. Very hard to follow those types.
Date command pollutes output, so tweak test.
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Replace it with SyncVar#put
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Deprecated ProcessBuilder's lines method and renamed it lineStream.
stream was another possibility, but that seemed more likely to cause conflicts.
streaming was also tried, but feedback was in favor of lineStream.
Also updated tutorial in ProcessBuilder.
I am sure this will break some tests, but because of the name conflict it's hard to be sure where they are. So Jenkins gets to find the problems for me.
Changed name to lineStream.
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Confusing, now-it-happens now-it-doesn't mysteries lurk
in the darkness. When scala packages are declared like this:
package scala.collection.mutable
Then paths relative to scala can easily be broken via the unlucky
presence of an empty (or nonempty) directory. Example:
// a.scala
package scala.foo
class Bar { new util.Random }
% scalac ./a.scala
% mkdir util
% scalac ./a.scala
./a.scala:4: error: type Random is not a member of package util
new util.Random
^
one error found
There are two ways to play defense against this:
- don't use relative paths; okay sometimes, less so others
- don't "opt out" of the scala package
This commit mostly pursues the latter, with occasional doses
of the former.
I created a scratch directory containing these empty directories:
actors annotation ant api asm beans cmd collection compat
concurrent control convert docutil dtd duration event factory
forkjoin generic hashing immutable impl include internal io
logging macros man1 matching math meta model mutable nsc parallel
parsing partest persistent process pull ref reflect reify remote
runtime scalap scheduler script swing sys text threadpool tools
transform unchecked util xml
I stopped when I could compile the main src directories
even with all those empties on my classpath.
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Some names I missed in 55b609458fd .
How one might know when one is done:
mkdir scratch && cd scratch
mkdir annotation beans collection compat concurrent io \
math parallel ref reflect runtime scala sys testing \
text tools util xml
scalac $(find ../src/library -name '*.scala')
Until recently that would fail with about a billion errors. When it
compiles, that's when you're done. And that's where this commit
takes us, for src/library at least.
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Pulled daemonized from the process API based on input from harrah. No
review.
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Added daemonized() method to ProcessBuilder so I can do things like
start fsc without the jvm failing to exit. More logging to fsc. scala -e
'5' now works again. Closes #4254, review by harrah.
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Fixed all the forms of process input/output redirection so the exit code
which makes it out is the exit code of the process. Also changing names
to be internally consistent and trying to prune pieces which don't make
so much sense without sbt around. Started on documentation. No review.
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Imported sbt.Process into trunk, in the guise of package
scala.sys.process. It is largely indistinguishable from the version in
sbt, at least from the outside.
Also, I renamed package system to sys. I wanted to do that from the
beginning and the desire has only grown since then. Sometimes a short
identifier is just critical to usability: with a function like error("")
called from hundreds of places, the difference between system.error and
sys.error is too big. sys.error and sys.exit have good vibes (at least
as good as the vibes can be for functions which error and exit.)
Note: this is just the first cut. I need to check this in to finish
fixing partest. I will be going over it with a comb and writing
documentation which will leave you enchanted, as well as removing other
bits which are now redundant or inferior. No review.
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