tests: handle Message-Id email header possible wrapping

The "Message-Id" header will get wrapped with a new line when exceeding
75 characters on Python 3 (see changeset 7d4f2e4899c5 introducing usage
of email.header.Header.encode and respective doc). This will occur in an
unpredictable manner depending on the hostname's length. To make the
test output consistent across Python versions and hostname
configuration, we add a filter to unwrap this header value.

tests/unwrap-message-id.py

@@ -0,0 +1,6 b''
+from __future__ import absolute_import, print_function
+
+import re
+import sys
+
+print(re.sub(r"(?<=Message-Id:) \n ", " ", sys.stdin.read()), end="")

tests/test-keyword.t

@@ -256,7 +256,8 b' ie. if patch.diff wrapper acts as it sho'
 
 Pull from bundle and trigger notify
 
-  $ hg pull -u ../kw.hg
+  $ hg pull -u ../kw.hg | \
+  >  "$PYTHON" $TESTDIR/unwrap-message-id.py
   pulling from ../kw.hg
   requesting all changes
   adding changesets

tests/test-notify.t

@@ -196,7 +196,9 b' the python call below wraps continuation'
 of the very long subject line
 pull (minimal config)
 
-  $ hg --traceback --cwd b --config notify.domain=example.com --config notify.messageidseed=example pull ../a | "$PYTHON" $TESTTMP/filter.py
+  $ hg --traceback --cwd b --config notify.domain=example.com --config notify.messageidseed=example pull ../a | \
+  >  "$PYTHON" $TESTDIR/unwrap-message-id.py | \
+  >  "$PYTHON" $TESTTMP/filter.py
   pulling from ../a
   searching for changes
   adding changesets
@@ -211,8 +213,7 b' pull (minimal config)'
   Subject: changeset in $TESTTMP/b: b
   From: [e-mail]
   X-Hg-Notification: changeset 00a13f371396
-  Message-Id: <hg.[e-mail]> (no-py3 !)
-  Message-Id:  <hg.[e-mail]> (py3 !)
+  Message-Id: <hg.[e-mail]>
   To: [e-mail], foo@bar
   
   changeset 00a13f371396 in $TESTTMP/b
@@ -256,7 +257,9 b' pull'
 
   $ hg --cwd b rollback
   repository tip rolled back to revision 0 (undo pull)
-  $ hg --traceback --cwd b pull ../a  | "$PYTHON" $TESTTMP/filter.py
+  $ hg --traceback --cwd b pull ../a | \
+  >  "$PYTHON" $TESTDIR/unwrap-message-id.py | \
+  >  "$PYTHON" $TESTTMP/filter.py
   pulling from ../a
   searching for changes
   adding changesets
@@ -304,7 +307,9 b' pull'
 
   $ hg --cwd b rollback
   repository tip rolled back to revision 0 (undo pull)
-  $ hg --traceback --config notify.maxdiffstat=1 --cwd b pull ../a | "$PYTHON" $TESTTMP/filter.py
+  $ hg --traceback --config notify.maxdiffstat=1 --cwd b pull ../a | \
+  >  "$PYTHON" $TESTDIR/unwrap-message-id.py | \
+  >  "$PYTHON" $TESTTMP/filter.py
   pulling from ../a
   searching for changes
   adding changesets
@@ -355,7 +360,9 b' test merge'
   (branch merge, don't forget to commit)
   $ hg ci -m merge -d '3 0'
   $ cd ..
-  $ hg --traceback --cwd b pull ../a | "$PYTHON" $TESTTMP/filter.py
+  $ hg --traceback --cwd b pull ../a | \
+  >  "$PYTHON" $TESTDIR/unwrap-message-id.py | \
+  >  "$PYTHON" $TESTTMP/filter.py
   pulling from ../a
   searching for changes
   adding changesets
@@ -421,6 +428,7 b' non-ascii content and truncation of mult'
   $ hg --cwd a --encoding utf-8 commit -A -d '0 0' \
   >   -m `"$PYTHON" -c 'import sys; getattr(sys.stdout, "buffer", sys.stdout).write(b"\xc3\xa0\xc3\xa1\xc3\xa2\xc3\xa3\xc3\xa4")'`
   $ hg --traceback --cwd b --encoding utf-8 pull ../a | \
+  >   "$PYTHON" $TESTDIR/unwrap-message-id.py | \
   >   "$PYTHON" $TESTTMP/filter.py
   pulling from ../a
   searching for changes
@@ -475,7 +483,7 b' long lines'
   new changesets a846b5f6ebb7
   notify: sending 2 subscribers 1 changes
   (run 'hg update' to get a working copy)
-  $ "$PYTHON" $TESTTMP/filter.py < b/mbox
+  $ cat b/mbox | "$PYTHON" $TESTDIR/unwrap-message-id.py | "$PYTHON" $TESTTMP/filter.py
   From [e-mail] ... ... .. ..:..:.. .... (re)
   MIME-Version: 1.0
   Content-Type: text/plain; charset="*" (glob)
@@ -535,7 +543,9 b' long lines'
   (branches are permanent and global, did you want a bookmark?)
   $ echo a >> a/a
   $ hg --cwd a ci -m test -d '1 0'
-  $ hg --traceback --cwd b pull ../a | "$PYTHON" $TESTTMP/filter.py
+  $ hg --traceback --cwd b pull ../a | \
+  >  "$PYTHON" $TESTDIR/unwrap-message-id.py | \
+  >  "$PYTHON" $TESTTMP/filter.py
   pulling from ../a
   searching for changes
   adding changesets
@@ -565,7 +575,9 b' from different branch'
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo a >> a/a
   $ hg --cwd a ci -m test -d '1 0'
-  $ hg --traceback --cwd b pull ../a | "$PYTHON" $TESTTMP/filter.py
+  $ hg --traceback --cwd b pull ../a | \
+  >  "$PYTHON" $TESTDIR/unwrap-message-id.py | \
+  >  "$PYTHON" $TESTTMP/filter.py
   pulling from ../a
   searching for changes
   adding changesets
@@ -594,7 +606,9 b' default template:'
   $ mv "$HGRCPATH.new" $HGRCPATH
   $ echo a >> a/a
   $ hg --cwd a commit -m 'default template'
-  $ hg --cwd b pull ../a -q | "$PYTHON" $TESTTMP/filter.py
+  $ hg --cwd b pull ../a -q | \
+  >  "$PYTHON" $TESTDIR/unwrap-message-id.py | \
+  >  "$PYTHON" $TESTTMP/filter.py
   MIME-Version: 1.0
   Content-Type: text/plain; charset="us-ascii"
   Content-Transfer-Encoding: 7bit
@@ -623,7 +637,9 b' with style:'
   > EOF
   $ echo a >> a/a
   $ hg --cwd a commit -m 'with style'
-  $ hg --cwd b pull ../a -q | "$PYTHON" $TESTTMP/filter.py
+  $ hg --cwd b pull ../a -q | \
+  >  "$PYTHON" $TESTDIR/unwrap-message-id.py | \
+  >  "$PYTHON" $TESTTMP/filter.py
   MIME-Version: 1.0
   Content-Type: text/plain; charset="us-ascii"
   Content-Transfer-Encoding: 7bit
@@ -646,7 +662,9 b' with template (overrides style):'
   > EOF
   $ echo a >> a/a
   $ hg --cwd a commit -m 'with template'
-  $ hg --cwd b pull ../a -q | "$PYTHON" $TESTTMP/filter.py
+  $ hg --cwd b pull ../a -q | \
+  >  "$PYTHON" $TESTDIR/unwrap-message-id.py | \
+  >  "$PYTHON" $TESTTMP/filter.py
   MIME-Version: 1.0
   Content-Type: text/plain; charset="us-ascii"
   Content-Transfer-Encoding: 7bit
@@ -677,7 +695,8 b' showfunc diff'
   > EOF
   $ hg commit -Am addfunction
   adding f1
-  $ hg --cwd ../b pull ../a
+  $ hg --cwd ../b pull ../a | \
+  >  "$PYTHON" $TESTDIR/unwrap-message-id.py
   pulling from ../a
   searching for changes
   adding changesets
@@ -720,7 +739,8 b' showfunc diff'
   > }
   > EOF
   $ hg commit -m changefunction
-  $ hg --cwd ../b --config notify.showfunc=True pull ../a
+  $ hg --cwd ../b --config notify.showfunc=True pull ../a | \
+  >  "$PYTHON" $TESTDIR/unwrap-message-id.py
   pulling from ../a
   searching for changes
   adding changesets