##// END OF EJS Templates
sshpeer: initial definition and implementation of new SSH protocol...
sshpeer: initial definition and implementation of new SSH protocol The existing SSH protocol has several design flaws. Future commits will elaborate on these flaws as new features are introduced to combat these flaws. For now, hopefully you can take me for my word that a ground up rewrite of the SSH protocol is needed. This commit lays the foundation for a new SSH protocol by defining a mechanism to upgrade the SSH transport channel away from the default (version 1) protocol to something modern (which we'll call "version 2" for now). This upgrade process is detailed in the internals documentation for the wire protocol. The gist of it is the client sends a request line preceding the "hello" command/line which basically says "I'm requesting an upgrade: here's what I support." If the server recognizes that line, it processes the upgrade request and the transport channel is switched to use the new version of the protocol. If not, it sends an empty response, which is how all Mercurial SSH servers from the beginning of time reacted to unknown commands. The upgrade request is effectively ignored and the client continues to use the existing version of the protocol as if nothing happened. The new version of the SSH protocol is completely identical to version 1 aside from the upgrade dance and the bytes that follow. The immediate bytes that follow the protocol switch are defined to be a length framed "capabilities: " line containing the remote's advertised capabilities. In reality, this looks very similar to what the "hello" response would look like. But it will evolve quickly. The methodology by which the protocol will evolve is important. I'm not going to introduce the new protocol all at once. That would likely lead to endless bike shedding and forward progress would stall. Instead, I intend to tricle out new features and diversions from the existing protocol in small, incremental changes. To support the gradual evolution of the protocol, the on-the-wire advertised protocol name contains an "exp" to denote "experimental" and a 4 digit field to capture the sub-version of the protocol. Whenever we make a BC change to the wire protocol, we can increment this version and lock out all older clients because it will appear as a completely different protocol version. This means we can incur as many breaking changes as we want. We don't have to commit to supporting any one feature or idea for a long period of time. We can even evolve the handshake mechanism, because that is defined as being an implementation detail of the negotiated protocol version! Hopefully this lowers the barrier to accepting changes to the protocol and for experimenting with "radical" ideas during its development. In core, sshpeer received most of the attention. We haven't even implemented the server bits for the new protocol in core yet. Instead, we add very primitive support to our test server, mainly just to exercise the added code paths in sshpeer. Differential Revision: https://phab.mercurial-scm.org/D2061 # no-check-commit because of required foo_bar naming

File last commit:

r35230:feecfefe default
r35994:48a3a928 default
Show More
test-addremove.t
94 lines | 1.6 KiB | text/troff | Tads3Lexer
Martin Geisler
tests: unify test-addremove
r11850 $ hg init rep
$ cd rep
$ mkdir dir
$ touch foo dir/bar
$ hg -v addremove
adding dir/bar
adding foo
Martin Geisler
tests: remove unneeded -d flags...
r12156 $ hg -v commit -m "add 1"
Mads Kiilerich
localrepo: show headline notes in commitctx before showing filenames...
r23749 committing files:
Martin Geisler
tests: unify test-addremove
r11850 dir/bar
foo
Mads Kiilerich
localrepo: show headline notes in commitctx before showing filenames...
r23749 committing manifest
committing changelog
Martin Geisler
tests: remove unneeded -d flags...
r12156 committed changeset 0:6f7f953567a2
Martin Geisler
tests: unify test-addremove
r11850 $ cd dir/
Adrian Buehlmann
test-addremove: remove bits about con.xml...
r16874 $ touch ../foo_2 bar_2
Martin Geisler
tests: unify test-addremove
r11850 $ hg -v addremove
adding dir/bar_2
adding foo_2
Martin Geisler
tests: remove unneeded -d flags...
r12156 $ hg -v commit -m "add 2"
Mads Kiilerich
localrepo: show headline notes in commitctx before showing filenames...
r23749 committing files:
Martin Geisler
tests: unify test-addremove
r11850 dir/bar_2
foo_2
Mads Kiilerich
localrepo: show headline notes in commitctx before showing filenames...
r23749 committing manifest
committing changelog
Adrian Buehlmann
test-addremove: remove bits about con.xml...
r16874 committed changeset 1:e65414bf35c5
Martin von Zweigbergk
addremove: add back forgotten files (BC)...
r23259 $ cd ..
$ hg forget foo
$ hg -v addremove
adding foo
Matt Harbison
addremove: warn when addremove fails to operate on a named path...
r23534 $ hg forget foo
Matt Harbison
test-addremove: conditionalize output instead of tests
r33340
Mads Kiilerich
spelling: fixes from proofreading of spell checker issues
r24180 $ hg -v addremove nonexistent
Matt Harbison
tests: add a substitution for ENOENT/ERROR_FILE_NOT_FOUND messages...
r35230 nonexistent: $ENOENT$
Matt Harbison
addremove: warn when addremove fails to operate on a named path...
r23534 [1]
Matt Harbison
test-addremove: conditionalize output instead of tests
r33340
Martin von Zweigbergk
addremove: add back forgotten files (BC)...
r23259 $ cd ..
Martin Geisler
tests: unify test-addremove
r11850
Martin von Zweigbergk
addremove: print relative paths when called with -I/-X (BC)...
r23427 $ hg init subdir
$ cd subdir
$ mkdir dir
$ cd dir
$ touch a.py
$ hg addremove 'glob:*.py'
adding a.py
$ hg forget a.py
$ hg addremove -I 'glob:*.py'
adding a.py
$ hg forget a.py
$ hg addremove
adding dir/a.py
$ cd ..
Martin Geisler
tests: unify test-addremove
r11850 $ hg init sim
$ cd sim
$ echo a > a
$ echo a >> a
$ echo a >> a
$ echo c > c
$ hg commit -Ama
adding a
adding c
$ mv a b
$ rm c
$ echo d > d
$ hg addremove -n -s 50 # issue 1696
removing a
adding b
removing c
adding d
recording removal of a as rename to b (100% similar)
$ hg addremove -s 50
removing a
adding b
removing c
adding d
recording removal of a as rename to b (100% similar)
$ hg commit -mb
Martin von Zweigbergk
addremove: add back forgotten files (BC)...
r23259 $ cp b c
$ hg forget b
$ hg addremove -s 50
adding b
adding c
Matt Harbison
commit: abort if --addremove is specified, but fails...
r23535
$ rm c
Matt Harbison
test-addremove: conditionalize output instead of tests
r33340
Mads Kiilerich
spelling: fixes from proofreading of spell checker issues
r24180 $ hg ci -A -m "c" nonexistent
Matt Harbison
tests: add a substitution for ENOENT/ERROR_FILE_NOT_FOUND messages...
r35230 nonexistent: $ENOENT$
Matt Harbison
commit: abort if --addremove is specified, but fails...
r23535 abort: failed to mark all new/missing files as added/removed
[255]
Matt Harbison
test-addremove: conditionalize output instead of tests
r33340
Matt Harbison
commit: abort if --addremove is specified, but fails...
r23535 $ hg st
! c
Mads Kiilerich
tests: cleanup of tests that got lost in their own nested directories...
r16912 $ cd ..