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.
Tests for the automv extension; detect moved files at commit time.
$ cat >> $HGRCPATH << EOF
> [extensions]
> automv=
> rebase=
> EOF
Setup repo
$ hg init repo
$ cd repo
Test automv command for commit
$ printf 'foo\nbar\nbaz\n' > a.txt
$ hg add a.txt
$ hg commit -m 'init repo with a'
mv/rm/add
$ mv a.txt b.txt
$ hg rm a.txt
$ hg add b.txt
$ hg status -C
A b.txt
R a.txt
$ hg commit -m 'msg'
detected move of 1 files
$ hg status --change . -C
A b.txt
a.txt
R a.txt
$ hg up -r 0
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
mv/rm/add/modif
$ mv a.txt b.txt
$ hg rm a.txt
$ hg add b.txt
$ printf '\n' >> b.txt
$ hg status -C
A b.txt
R a.txt
$ hg commit -m 'msg'
detected move of 1 files
created new head
$ hg status --change . -C
A b.txt
a.txt
R a.txt
$ hg up -r 0
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
mv/rm/add/modif
$ mv a.txt b.txt
$ hg rm a.txt
$ hg add b.txt
$ printf '\nfoo\n' >> b.txt
$ hg status -C
A b.txt
R a.txt
$ hg commit -m 'msg'
created new head
$ hg status --change . -C
A b.txt
R a.txt
$ hg up -r 0
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
mv/rm/add/modif/changethreshold
$ mv a.txt b.txt
$ hg rm a.txt
$ hg add b.txt
$ printf '\nfoo\n' >> b.txt
$ hg status -C
A b.txt
R a.txt
$ hg commit --config automv.similarity='60' -m 'msg'
detected move of 1 files
created new head
$ hg status --change . -C
A b.txt
a.txt
R a.txt
$ hg up -r 0
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
mv
$ mv a.txt b.txt
$ hg status -C
! a.txt
? b.txt
$ hg commit -m 'msg'
nothing changed (1 missing files, see 'hg status')
[1]
$ hg status -C
! a.txt
? b.txt
$ hg revert -aqC
$ rm b.txt
mv/rm/add/notincommitfiles
$ mv a.txt b.txt
$ hg rm a.txt
$ hg add b.txt
$ echo 'bar' > c.txt
$ hg add c.txt
$ hg status -C
A b.txt
A c.txt
R a.txt
$ hg commit c.txt -m 'msg'
created new head
$ hg status --change . -C
A c.txt
$ hg status -C
A b.txt
R a.txt
$ hg up -r 0
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg rm a.txt
$ echo 'bar' > c.txt
$ hg add c.txt
$ hg commit -m 'msg'
detected move of 1 files
created new head
$ hg status --change . -C
A b.txt
a.txt
A c.txt
R a.txt
$ hg up -r 0
1 files updated, 0 files merged, 2 files removed, 0 files unresolved
mv/rm/add/--no-automv
$ mv a.txt b.txt
$ hg rm a.txt
$ hg add b.txt
$ hg status -C
A b.txt
R a.txt
$ hg commit --no-automv -m 'msg'
created new head
$ hg status --change . -C
A b.txt
R a.txt
$ hg up -r 0
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
Test automv command for commit --amend
mv/rm/add
$ echo 'c' > c.txt
$ hg add c.txt
$ hg commit -m 'revision to amend to'
created new head
$ mv a.txt b.txt
$ hg rm a.txt
$ hg add b.txt
$ hg status -C
A b.txt
R a.txt
$ hg commit --amend -m 'amended'
detected move of 1 files
saved backup bundle to $TESTTMP/repo/.hg/strip-backup/*-amend.hg (glob)
$ hg status --change . -C
A b.txt
a.txt
A c.txt
R a.txt
$ hg up -r 0
1 files updated, 0 files merged, 2 files removed, 0 files unresolved
mv/rm/add/modif
$ echo 'c' > c.txt
$ hg add c.txt
$ hg commit -m 'revision to amend to'
created new head
$ mv a.txt b.txt
$ hg rm a.txt
$ hg add b.txt
$ printf '\n' >> b.txt
$ hg status -C
A b.txt
R a.txt
$ hg commit --amend -m 'amended'
detected move of 1 files
saved backup bundle to $TESTTMP/repo/.hg/strip-backup/*-amend.hg (glob)
$ hg status --change . -C
A b.txt
a.txt
A c.txt
R a.txt
$ hg up -r 0
1 files updated, 0 files merged, 2 files removed, 0 files unresolved
mv/rm/add/modif
$ echo 'c' > c.txt
$ hg add c.txt
$ hg commit -m 'revision to amend to'
created new head
$ mv a.txt b.txt
$ hg rm a.txt
$ hg add b.txt
$ printf '\nfoo\n' >> b.txt
$ hg status -C
A b.txt
R a.txt
$ hg commit --amend -m 'amended'
saved backup bundle to $TESTTMP/repo/.hg/strip-backup/*-amend.hg (glob)
$ hg status --change . -C
A b.txt
A c.txt
R a.txt
$ hg up -r 0
1 files updated, 0 files merged, 2 files removed, 0 files unresolved
mv/rm/add/modif/changethreshold
$ echo 'c' > c.txt
$ hg add c.txt
$ hg commit -m 'revision to amend to'
created new head
$ mv a.txt b.txt
$ hg rm a.txt
$ hg add b.txt
$ printf '\nfoo\n' >> b.txt
$ hg status -C
A b.txt
R a.txt
$ hg commit --amend --config automv.similarity='60' -m 'amended'
detected move of 1 files
saved backup bundle to $TESTTMP/repo/.hg/strip-backup/*-amend.hg (glob)
$ hg status --change . -C
A b.txt
a.txt
A c.txt
R a.txt
$ hg up -r 0
1 files updated, 0 files merged, 2 files removed, 0 files unresolved
mv
$ echo 'c' > c.txt
$ hg add c.txt
$ hg commit -m 'revision to amend to'
created new head
$ mv a.txt b.txt
$ hg status -C
! a.txt
? b.txt
$ hg commit --amend -m 'amended'
saved backup bundle to $TESTTMP/repo/.hg/strip-backup/*-amend.hg (glob)
$ hg status -C
! a.txt
? b.txt
$ hg up -Cr 0
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
mv/rm/add/notincommitfiles
$ echo 'c' > c.txt
$ hg add c.txt
$ hg commit -m 'revision to amend to'
created new head
$ mv a.txt b.txt
$ hg rm a.txt
$ hg add b.txt
$ echo 'bar' > d.txt
$ hg add d.txt
$ hg status -C
A b.txt
A d.txt
R a.txt
$ hg commit --amend -m 'amended' d.txt
saved backup bundle to $TESTTMP/repo/.hg/strip-backup/*-amend.hg (glob)
$ hg status --change . -C
A c.txt
A d.txt
$ hg status -C
A b.txt
R a.txt
$ hg commit --amend -m 'amended'
detected move of 1 files
saved backup bundle to $TESTTMP/repo/.hg/strip-backup/*-amend.hg (glob)
$ hg status --change . -C
A b.txt
a.txt
A c.txt
A d.txt
R a.txt
$ hg up -r 0
1 files updated, 0 files merged, 3 files removed, 0 files unresolved
mv/rm/add/--no-automv
$ echo 'c' > c.txt
$ hg add c.txt
$ hg commit -m 'revision to amend to'
created new head
$ mv a.txt b.txt
$ hg rm a.txt
$ hg add b.txt
$ hg status -C
A b.txt
R a.txt
$ hg commit --amend -m 'amended' --no-automv
saved backup bundle to $TESTTMP/repo/.hg/strip-backup/*-amend.hg (glob)
$ hg status --change . -C
A b.txt
A c.txt
R a.txt
$ hg up -r 0
1 files updated, 0 files merged, 2 files removed, 0 files unresolved
mv/rm/commit/add/amend
$ echo 'c' > c.txt
$ hg add c.txt
$ hg commit -m 'revision to amend to'
created new head
$ mv a.txt b.txt
$ hg rm a.txt
$ hg status -C
R a.txt
? b.txt
$ hg commit -m "removed a"
$ hg add b.txt
$ hg commit --amend -m 'amended'
saved backup bundle to $TESTTMP/repo/.hg/strip-backup/*-amend.hg (glob)
$ hg status --change . -C
A b.txt
R a.txt
error conditions
$ cat >> $HGRCPATH << EOF
> [automv]
> similarity=110
> EOF
$ hg commit -m 'revision to amend to'
abort: automv.similarity must be between 0 and 100
[255]