test: add test-transaction-rollback-on-sigpipe.t demonstrating py3 regression
When an hg push is interrupted with C-c, the remote [hg serve] command
receives SIGPIPE.
If a pretxnchangegroup hook fails, the remote hg then tries to
rollback the transaction. It begins by printing "transaction
abort!\n". This returns EPIPE, but ui.py ignores that error.
In python3 (but not python2), this "transaction abort!\n" message
stays in a buffer, so future flushes of stderr will try to print the
message again, and so those flushes will also hit EPIPE.
This test demonstrates such a case where this EPIPE causes the
transaction rollback to fail, leaving behind an abandoned transaction.
Differential Revision: https://phab.mercurial-scm.org/D9151
$ cat > makepatch.py <<EOF
> import sys
> f = open(sys.argv[2], 'wb')
> w = f.write
> w(b'test message\n')
> w(b'diff --git a/a b/a\n')
> w(b'--- a/a\n')
> w(b'+++ b/a\n')
> w(b'@@ -1,5 +1,5 @@\n')
> w(b' a\n')
> w(b'-bbb\r\n')
> w(b'+yyyy\r\n')
> w(b' cc\r\n')
> w({'empty:lf': b' \n',
> 'empty:crlf': b' \r\n',
> 'empty:stripped-lf': b'\n',
> 'empty:stripped-crlf': b'\r\n'}[sys.argv[1]])
> w(b' d\n')
> w(b'-e\n')
> w(b'\\\\ No newline at end of file\n')
> w(b'+z\r\n')
> w(b'\\\\ No newline at end of file\r\n')
> EOF
$ hg init repo
$ cd repo
$ echo '\.diff' > .hgignore
Test different --eol values
$ "$PYTHON" -c 'open("a", "wb").write(b"a\nbbb\ncc\n\nd\ne")'
$ hg ci -Am adda
adding .hgignore
adding a
$ "$PYTHON" ../makepatch.py empty:lf eol.diff
$ "$PYTHON" ../makepatch.py empty:crlf eol-empty-crlf.diff
$ "$PYTHON" ../makepatch.py empty:stripped-lf eol-empty-stripped-lf.diff
$ "$PYTHON" ../makepatch.py empty:stripped-crlf eol-empty-stripped-crlf.diff
invalid eol
$ hg --config patch.eol='LFCR' import eol.diff
applying eol.diff
abort: unsupported line endings type: LFCR
[255]
$ hg revert -a
force LF
$ hg --traceback --config patch.eol='LF' import eol.diff
applying eol.diff
$ hg id
9e4ef7b3d4af tip
$ cat a
a
yyyy
cc
d
e (no-eol)
$ hg st
(test empty-line variants: all of them should generate the same revision)
$ hg up -qC 0
$ hg --config patch.eol='LF' import eol-empty-crlf.diff
applying eol-empty-crlf.diff
$ hg id
9e4ef7b3d4af tip
$ hg up -qC 0
$ hg --config patch.eol='LF' import eol-empty-stripped-lf.diff
applying eol-empty-stripped-lf.diff
$ hg id
9e4ef7b3d4af tip
$ hg up -qC 0
$ hg --config patch.eol='LF' import eol-empty-stripped-crlf.diff
applying eol-empty-stripped-crlf.diff
$ hg id
9e4ef7b3d4af tip
force CRLF
$ hg up -C 0
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg --traceback --config patch.eol='CRLF' import eol.diff
applying eol.diff
$ cat a
a\r (esc)
yyyy\r (esc)
cc\r (esc)
\r (esc)
d\r (esc)
e (no-eol)
$ hg st
auto EOL on LF file
$ hg up -C 0
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg --traceback --config patch.eol='auto' import eol.diff
applying eol.diff
$ cat a
a
yyyy
cc
d
e (no-eol)
$ hg st
auto EOL on CRLF file
$ "$PYTHON" -c 'open("a", "wb").write(b"a\r\nbbb\r\ncc\r\n\r\nd\r\ne")'
$ hg commit -m 'switch EOLs in a'
$ hg --traceback --config patch.eol='auto' import eol.diff
applying eol.diff
$ cat a
a\r (esc)
yyyy\r (esc)
cc\r (esc)
\r (esc)
d\r (esc)
e (no-eol)
$ hg st
auto EOL on new file or source without any EOL
$ "$PYTHON" -c 'open("noeol", "wb").write(b"noeol")'
$ hg add noeol
$ hg commit -m 'add noeol'
$ "$PYTHON" -c 'open("noeol", "wb").write(b"noeol\r\nnoeol\n")'
$ "$PYTHON" -c 'open("neweol", "wb").write(b"neweol\nneweol\r\n")'
$ hg add neweol
$ hg diff --git > noeol.diff
$ hg revert --no-backup noeol neweol
$ rm neweol
$ hg --traceback --config patch.eol='auto' import -m noeol noeol.diff
applying noeol.diff
$ cat noeol
noeol\r (esc)
noeol
$ cat neweol
neweol
neweol\r (esc)
$ hg st
Test --eol and binary patches
$ "$PYTHON" -c 'open("b", "wb").write(b"a\x00\nb\r\nd")'
$ hg ci -Am addb
adding b
$ "$PYTHON" -c 'open("b", "wb").write(b"a\x00\nc\r\nd")'
$ hg diff --git > bin.diff
$ hg revert --no-backup b
binary patch with --eol
$ hg import --config patch.eol='CRLF' -m changeb bin.diff
applying bin.diff
$ cat b
a\x00 (esc)
c\r (esc)
d (no-eol)
$ hg st
$ cd ..