procutil: make stream detection in make_line_buffered more correct and strict
In make_line_buffered(), we don’t want to wrap the stream if we know that lines
get flushed to the underlying raw stream already.
Previously, the heuristic was too optimistic. It assumed that any stream which
is not an instance of io.BufferedIOBase doesn’t need wrapping. However, there
are buffered streams that aren’t instances of io.BufferedIOBase, like
Mercurial’s own winstdout.
The new logic is different in two ways:
First, only for the check, if unwraps any combination of WriteAllWrapper and
winstdout.
Second, it skips wrapping the stream only if it is an instance of io.RawIOBase
(or already wrapped). If it is an instance of io.BufferedIOBase, it gets
wrapped. In any other case, the function raises an exception. This ensures
that, if an unknown stream is passed or we add another wrapper in the future,
we don’t wrap the stream if it’s already line buffered or not wrap the stream
if it’s not line buffered. In fact, this was already helpful during development
of this change. Without it, I possibly would have forgot that WriteAllWrapper
needs to be ignored for the check, leading to unnecessary wrapping if stdout is
unbuffered.
The alternative would have been to always wrap unknown streams. However, I
don’t think that anyone would benefit from being less strict. We can expect
streams from the standard library to be subclassing either io.RawIOBase or
io.BufferedIOBase, so running Mercurial in the standard way should not regress
by this change. Py2exe might replace sys.stdout and sys.stderr, but that
currently breaks Mercurial anyway and also these streams don’t claim to be
interactive, so this function is not called for them.
========================================================
Test the ability to access a hidden revision on a server
========================================================
#require serve
$ . $TESTDIR/testlib/obsmarker-common.sh
$ cat >> $HGRCPATH << EOF
> [phases]
> # public changeset are not obsolete
> publish=false
> [experimental]
> evolution=all
> [ui]
> logtemplate='{rev}:{node|short} {desc} [{phase}]\n'
> EOF
Setup a simple repository with some hidden revisions
----------------------------------------------------
Testing the `served.hidden` view
$ hg init repo-with-hidden
$ cd repo-with-hidden
$ echo 0 > a
$ hg ci -qAm "c_Public"
$ hg phase --public
$ echo 1 > a
$ hg ci -m "c_Amend_Old"
$ echo 2 > a
$ hg ci -m "c_Amend_New" --amend
$ hg up ".^"
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo 3 > a
$ hg ci -m "c_Pruned"
created new head
$ hg debugobsolete --record-parents `getid 'desc("c_Pruned")'` -d '0 0'
1 new obsolescence markers
obsoleted 1 changesets
$ hg up ".^"
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo 4 > a
$ hg ci -m "c_Secret" --secret
created new head
$ echo 5 > a
$ hg ci -m "c_Secret_Pruned" --secret
$ hg debugobsolete --record-parents `getid 'desc("c_Secret_Pruned")'` -d '0 0'
1 new obsolescence markers
obsoleted 1 changesets
$ hg up null
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg log -G -T '{rev}:{node|short} {desc} [{phase}]\n' --hidden
x 5:8d28cbe335f3 c_Secret_Pruned [secret]
|
o 4:1c6afd79eb66 c_Secret [secret]
|
| x 3:5d1575e42c25 c_Pruned [draft]
|/
| o 2:c33affeb3f6b c_Amend_New [draft]
|/
| x 1:be215fbb8c50 c_Amend_Old [draft]
|/
o 0:5f354f46e585 c_Public [public]
$ hg debugobsolete
be215fbb8c5090028b00154c1fe877ad1b376c61 c33affeb3f6b4e9621d1839d6175ddc07708807c 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '9', 'operation': 'amend', 'user': 'test'}
5d1575e42c25b7f2db75cd4e0b881b1c35158fae 0 {5f354f46e5853535841ec7a128423e991ca4d59b} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
8d28cbe335f311bc89332d7bbe8a07889b6914a0 0 {1c6afd79eb6663275bbe30097e162b1c24ced0f0} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
$ cd ..
Test the feature
================
Check cache pre-warm
--------------------
$ ls -1 repo-with-hidden/.hg/cache
branch2
branch2-base
branch2-served
branch2-served.hidden
branch2-visible
rbc-names-v1
rbc-revs-v1
tags2
tags2-visible
Check that the `served.hidden` repoview
---------------------------------------
$ hg -R repo-with-hidden serve -p $HGPORT -d --pid-file hg.pid --config web.view=served.hidden
$ cat hg.pid >> $DAEMON_PIDS
changesets in secret and higher phases are not visible through hgweb
$ hg -R repo-with-hidden log --template "revision: {rev}\\n" --rev "reverse(not secret())"
revision: 2
revision: 0
$ hg -R repo-with-hidden log --template "revision: {rev}\\n" --rev "reverse(not secret())" --hidden
revision: 3
revision: 2
revision: 1
revision: 0
$ get-with-headers.py localhost:$HGPORT 'log?style=raw' | grep revision:
revision: 3
revision: 2
revision: 1
revision: 0
$ killdaemons.py