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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

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test-globalopts.t
461 lines | 14.1 KiB | text/troff | Tads3Lexer
$ hg init a
$ cd a
$ echo a > a
$ hg ci -A -d'1 0' -m a
adding a
$ cd ..
$ hg init b
$ cd b
$ echo b > b
$ hg ci -A -d'1 0' -m b
adding b
$ cd ..
$ hg clone a c
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd c
$ cat >> .hg/hgrc <<EOF
> [paths]
> relative = ../a
> EOF
$ hg pull -f ../b
pulling from ../b
searching for changes
warning: repository is unrelated
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files (+1 heads)
new changesets b6c483daf290
(run 'hg heads' to see heads, 'hg merge' to merge)
$ hg merge
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ cd ..
Testing -R/--repository:
$ hg -R a tip
changeset: 0:8580ff50825a
tag: tip
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: a
$ hg --repository b tip
changeset: 0:b6c483daf290
tag: tip
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: b
-R with a URL:
$ hg -R file:a identify
8580ff50825a tip
$ hg -R file://localhost/`pwd`/a/ identify
8580ff50825a tip
-R with path aliases:
$ cd c
$ hg -R default identify
8580ff50825a tip
$ hg -R relative identify
8580ff50825a tip
$ echo '[paths]' >> $HGRCPATH
$ echo 'relativetohome = a' >> $HGRCPATH
$ HOME=`pwd`/../ hg -R relativetohome identify
8580ff50825a tip
$ cd ..
#if no-outer-repo
Implicit -R:
$ hg ann a/a
0: a
$ hg ann a/a a/a
0: a
$ hg ann a/a b/b
abort: no repository found in '$TESTTMP' (.hg not found)!
[255]
$ hg -R b ann a/a
abort: a/a not under root '$TESTTMP/b'
(consider using '--cwd b')
[255]
$ hg log
abort: no repository found in '$TESTTMP' (.hg not found)!
[255]
#endif
Abbreviation of long option:
$ hg --repo c tip
changeset: 1:b6c483daf290
tag: tip
parent: -1:000000000000
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: b
earlygetopt with duplicate options (36d23de02da1):
$ hg --cwd a --cwd b --cwd c tip
changeset: 1:b6c483daf290
tag: tip
parent: -1:000000000000
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: b
$ hg --repo c --repository b -R a tip
changeset: 0:8580ff50825a
tag: tip
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: a
earlygetopt short option without following space:
$ hg -q -Rb tip
0:b6c483daf290
earlygetopt with illegal abbreviations:
$ hg --confi "foo.bar=baz"
abort: option --config may not be abbreviated!
[255]
$ hg --cw a tip
abort: option --cwd may not be abbreviated!
[255]
$ hg --rep a tip
abort: option -R has to be separated from other options (e.g. not -qR) and --repository may only be abbreviated as --repo!
[255]
$ hg --repositor a tip
abort: option -R has to be separated from other options (e.g. not -qR) and --repository may only be abbreviated as --repo!
[255]
$ hg -qR a tip
abort: option -R has to be separated from other options (e.g. not -qR) and --repository may only be abbreviated as --repo!
[255]
$ hg -qRa tip
abort: option -R has to be separated from other options (e.g. not -qR) and --repository may only be abbreviated as --repo!
[255]
Testing --cwd:
$ hg --cwd a parents
changeset: 0:8580ff50825a
tag: tip
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: a
Testing -y/--noninteractive - just be sure it is parsed:
$ hg --cwd a tip -q --noninteractive
0:8580ff50825a
$ hg --cwd a tip -q -y
0:8580ff50825a
Testing -q/--quiet:
$ hg -R a -q tip
0:8580ff50825a
$ hg -R b -q tip
0:b6c483daf290
$ hg -R c --quiet parents
0:8580ff50825a
1:b6c483daf290
Testing -v/--verbose:
$ hg --cwd c head -v
changeset: 1:b6c483daf290
tag: tip
parent: -1:000000000000
user: test
date: Thu Jan 01 00:00:01 1970 +0000
files: b
description:
b
changeset: 0:8580ff50825a
user: test
date: Thu Jan 01 00:00:01 1970 +0000
files: a
description:
a
$ hg --cwd b tip --verbose
changeset: 0:b6c483daf290
tag: tip
user: test
date: Thu Jan 01 00:00:01 1970 +0000
files: b
description:
b
Testing --config:
$ hg --cwd c --config paths.quuxfoo=bar paths | grep quuxfoo > /dev/null && echo quuxfoo
quuxfoo
$ hg --cwd c --config '' tip -q
abort: malformed --config option: '' (use --config section.name=value)
[255]
$ hg --cwd c --config a.b tip -q
abort: malformed --config option: 'a.b' (use --config section.name=value)
[255]
$ hg --cwd c --config a tip -q
abort: malformed --config option: 'a' (use --config section.name=value)
[255]
$ hg --cwd c --config a.= tip -q
abort: malformed --config option: 'a.=' (use --config section.name=value)
[255]
$ hg --cwd c --config .b= tip -q
abort: malformed --config option: '.b=' (use --config section.name=value)
[255]
Testing --debug:
$ hg --cwd c log --debug
changeset: 1:b6c483daf2907ce5825c0bb50f5716226281cc1a
tag: tip
phase: public
parent: -1:0000000000000000000000000000000000000000
parent: -1:0000000000000000000000000000000000000000
manifest: 1:23226e7a252cacdc2d99e4fbdc3653441056de49
user: test
date: Thu Jan 01 00:00:01 1970 +0000
files+: b
extra: branch=default
description:
b
changeset: 0:8580ff50825a50c8f716709acdf8de0deddcd6ab
phase: public
parent: -1:0000000000000000000000000000000000000000
parent: -1:0000000000000000000000000000000000000000
manifest: 0:a0c8bcbbb45c63b90b70ad007bf38961f64f2af0
user: test
date: Thu Jan 01 00:00:01 1970 +0000
files+: a
extra: branch=default
description:
a
Testing --traceback:
#if no-chg
$ hg --cwd c --config x --traceback id 2>&1 | grep -i 'traceback'
Traceback (most recent call last):
#else
Traceback for '--config' errors not supported with chg.
$ hg --cwd c --config x --traceback id 2>&1 | grep -i 'traceback'
[1]
#endif
Testing --time:
$ hg --cwd a --time id
8580ff50825a tip
time: real * (glob)
Testing --version:
$ hg --version -q
Mercurial Distributed SCM * (glob)
hide outer repo
$ hg init
Testing -h/--help:
$ hg -h
Mercurial Distributed SCM
list of commands:
add add the specified files on the next commit
addremove add all new files, delete all missing files
annotate show changeset information by line for each file
archive create an unversioned archive of a repository revision
backout reverse effect of earlier changeset
bisect subdivision search of changesets
bookmarks create a new bookmark or list existing bookmarks
branch set or show the current branch name
branches list repository named branches
bundle create a bundle file
cat output the current or given revision of files
clone make a copy of an existing repository
commit commit the specified files or all outstanding changes
config show combined config settings from all hgrc files
copy mark files as copied for the next commit
diff diff repository (or selected files)
export dump the header and diffs for one or more changesets
files list tracked files
forget forget the specified files on the next commit
graft copy changes from other branches onto the current branch
grep search revision history for a pattern in specified files
heads show branch heads
help show help for a given topic or a help overview
identify identify the working directory or specified revision
import import an ordered set of patches
incoming show new changesets found in source
init create a new repository in the given directory
log show revision history of entire repository or files
manifest output the current or given revision of the project manifest
merge merge another revision into working directory
outgoing show changesets not found in the destination
paths show aliases for remote repositories
phase set or show the current phase name
pull pull changes from the specified source
push push changes to the specified destination
recover roll back an interrupted transaction
remove remove the specified files on the next commit
rename rename files; equivalent of copy + remove
resolve redo merges or set/view the merge status of files
revert restore files to their checkout state
root print the root (top) of the current working directory
serve start stand-alone webserver
status show changed files in the working directory
summary summarize working directory state
tag add one or more tags for the current or given revision
tags list repository tags
unbundle apply one or more bundle files
update update working directory (or switch revisions)
verify verify the integrity of the repository
version output version and copyright information
additional help topics:
bundlespec Bundle File Formats
color Colorizing Outputs
config Configuration Files
dates Date Formats
diffs Diff Formats
environment Environment Variables
extensions Using Additional Features
filesets Specifying File Sets
flags Command-line flags
glossary Glossary
hgignore Syntax for Mercurial Ignore Files
hgweb Configuring hgweb
internals Technical implementation topics
merge-tools Merge Tools
pager Pager Support
patterns File Name Patterns
phases Working with Phases
revisions Specifying Revisions
scripting Using Mercurial from scripts and automation
subrepos Subrepositories
templating Template Usage
urls URL Paths
(use 'hg help -v' to show built-in aliases and global options)
$ hg --help
Mercurial Distributed SCM
list of commands:
add add the specified files on the next commit
addremove add all new files, delete all missing files
annotate show changeset information by line for each file
archive create an unversioned archive of a repository revision
backout reverse effect of earlier changeset
bisect subdivision search of changesets
bookmarks create a new bookmark or list existing bookmarks
branch set or show the current branch name
branches list repository named branches
bundle create a bundle file
cat output the current or given revision of files
clone make a copy of an existing repository
commit commit the specified files or all outstanding changes
config show combined config settings from all hgrc files
copy mark files as copied for the next commit
diff diff repository (or selected files)
export dump the header and diffs for one or more changesets
files list tracked files
forget forget the specified files on the next commit
graft copy changes from other branches onto the current branch
grep search revision history for a pattern in specified files
heads show branch heads
help show help for a given topic or a help overview
identify identify the working directory or specified revision
import import an ordered set of patches
incoming show new changesets found in source
init create a new repository in the given directory
log show revision history of entire repository or files
manifest output the current or given revision of the project manifest
merge merge another revision into working directory
outgoing show changesets not found in the destination
paths show aliases for remote repositories
phase set or show the current phase name
pull pull changes from the specified source
push push changes to the specified destination
recover roll back an interrupted transaction
remove remove the specified files on the next commit
rename rename files; equivalent of copy + remove
resolve redo merges or set/view the merge status of files
revert restore files to their checkout state
root print the root (top) of the current working directory
serve start stand-alone webserver
status show changed files in the working directory
summary summarize working directory state
tag add one or more tags for the current or given revision
tags list repository tags
unbundle apply one or more bundle files
update update working directory (or switch revisions)
verify verify the integrity of the repository
version output version and copyright information
additional help topics:
bundlespec Bundle File Formats
color Colorizing Outputs
config Configuration Files
dates Date Formats
diffs Diff Formats
environment Environment Variables
extensions Using Additional Features
filesets Specifying File Sets
flags Command-line flags
glossary Glossary
hgignore Syntax for Mercurial Ignore Files
hgweb Configuring hgweb
internals Technical implementation topics
merge-tools Merge Tools
pager Pager Support
patterns File Name Patterns
phases Working with Phases
revisions Specifying Revisions
scripting Using Mercurial from scripts and automation
subrepos Subrepositories
templating Template Usage
urls URL Paths
(use 'hg help -v' to show built-in aliases and global options)
Not tested: --debugger