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wireprotov2: implement commands as a generator of objects...
wireprotov2: implement commands as a generator of objects Previously, wire protocol version 2 inherited version 1's model of having separate types to represent the results of different wire protocol commands. As I implemented more powerful commands in future commits, I found I was using a common pattern of returning a special type to hold a generator. This meant the command function required a closure to do most of the work. That made logic flow more difficult to follow. I also noticed that many commands were effectively a sequence of objects to be CBOR encoded. I think it makes sense to define version 2 commands as generators. This way, commands can simply emit the data structures they wish to send to the client. This eliminates the need for a closure in command functions and removes encoding from the bodies of commands. As part of this commit, the handling of response objects has been moved into the serverreactor class. This puts the reactor in the driver's seat with regards to CBOR encoding and error handling. Having error handling in the function that emits frames is particularly important because exceptions in that function can lead to things getting in a bad state: I'm fairly certain that uncaught exceptions in the frame generator were causing deadlocks. I also introduced a dedicated error type for explicit error reporting in command handlers. This will be used in subsequent commits. There's still a bit of work to be done here, especially around formalizing the error handling "protocol." I've added yet another TODO to track this so we don't forget. Test output changed because we're using generators and no longer know we are at the end of the data until we hit the end of the generator. This means we can't emit the end-of-stream flag until we've exhausted the generator. Hence the introduction of 0-sized end-of-stream frames. Differential Revision: https://phab.mercurial-scm.org/D4472
Boris Feld - - Load All Authors

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test-remove.t
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$ remove() {
> hg rm $@
> echo "exit code: $?"
> hg st
> # do not use ls -R, which recurses in .hg subdirs on Mac OS X 10.5
> find . -name .hg -prune -o -type f -print | sort
> hg up -C
> }
$ cat >> $HGRCPATH <<EOF
> [progress]
> disable=False
> assume-tty = 1
> delay = 0
> # set changedelay really large so we don't see nested topics
> changedelay = 30000
> format = topic bar number
> refresh = 0
> width = 60
> EOF
$ hg init a
$ cd a
$ echo a > foo
file not managed
$ remove foo
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
not removing foo: file is untracked
exit code: 1
? foo
./foo
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg add foo
$ hg commit -m1
the table cases
00 state added, options none
$ echo b > bar
$ hg add bar
$ remove bar
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
\r (no-eol) (esc)
skipping [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
not removing bar: file has been marked for add (use 'hg forget' to undo add)
exit code: 1
A bar
./bar
./foo
\r (no-eol) (esc)
updating [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
01 state clean, options none
$ remove foo
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
exit code: 0
R foo
? bar
./bar
\r (no-eol) (esc)
updating [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
02 state modified, options none
$ echo b >> foo
$ remove foo
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
\r (no-eol) (esc)
skipping [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
not removing foo: file is modified (use -f to force removal)
exit code: 1
M foo
? bar
./bar
./foo
\r (no-eol) (esc)
updating [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
03 state missing, options none
$ rm foo
$ remove foo
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
exit code: 0
R foo
? bar
./bar
\r (no-eol) (esc)
updating [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
10 state added, options -f
$ echo b > bar
$ hg add bar
$ remove -f bar
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
exit code: 0
? bar
./bar
./foo
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ rm bar
11 state clean, options -f
$ remove -f foo
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
exit code: 0
R foo
\r (no-eol) (esc)
updating [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
12 state modified, options -f
$ echo b >> foo
$ remove -f foo
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
exit code: 0
R foo
\r (no-eol) (esc)
updating [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
13 state missing, options -f
$ rm foo
$ remove -f foo
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
exit code: 0
R foo
\r (no-eol) (esc)
updating [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
20 state added, options -A
$ echo b > bar
$ hg add bar
$ remove -A bar
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
\r (no-eol) (esc)
skipping [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
not removing bar: file still exists
exit code: 1
A bar
./bar
./foo
\r (no-eol) (esc)
updating [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
21 state clean, options -Av
$ remove -Av foo
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
\r (no-eol) (esc)
skipping [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
not removing foo: file still exists
exit code: 1
? bar
./bar
./foo
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
22 state modified, options -Av
$ echo b >> foo
$ remove -Av foo
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
\r (no-eol) (esc)
skipping [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
not removing foo: file still exists
exit code: 1
M foo
? bar
./bar
./foo
\r (no-eol) (esc)
updating [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
23 state missing, options -A
$ rm foo
$ remove -A foo
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
exit code: 0
R foo
? bar
./bar
\r (no-eol) (esc)
updating [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
30 state added, options -Af
$ echo b > bar
$ hg add bar
$ remove -Af bar
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
exit code: 0
? bar
./bar
./foo
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ rm bar
31 state clean, options -Af
$ remove -Af foo
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
exit code: 0
R foo
./foo
\r (no-eol) (esc)
updating [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
32 state modified, options -Af
$ echo b >> foo
$ remove -Af foo
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
exit code: 0
R foo
./foo
\r (no-eol) (esc)
updating [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
33 state missing, options -Af
$ rm foo
$ remove -Af foo
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
exit code: 0
R foo
\r (no-eol) (esc)
updating [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
test some directory stuff
$ mkdir test
$ echo a > test/foo
$ echo b > test/bar
$ hg ci -Am2
adding test/bar
adding test/foo
dir, options none
$ rm test/bar
$ remove test
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
\r (no-eol) (esc)
deleting [=====================> ] 1/2\r (no-eol) (esc)
\r (no-eol) (esc)
\r (no-eol) (esc)
deleting [===========================================>] 2/2\r (no-eol) (esc)
\r (no-eol) (esc)
removing test/bar
removing test/foo
exit code: 0
R test/bar
R test/foo
./foo
\r (no-eol) (esc)
updating [===========================================>] 2/2\r (no-eol) (esc)
\r (no-eol) (esc)
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
dir, options -f
$ rm test/bar
$ remove -f test
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
\r (no-eol) (esc)
deleting [=====================> ] 1/2\r (no-eol) (esc)
\r (no-eol) (esc)
\r (no-eol) (esc)
deleting [===========================================>] 2/2\r (no-eol) (esc)
\r (no-eol) (esc)
removing test/bar
removing test/foo
exit code: 0
R test/bar
R test/foo
./foo
\r (no-eol) (esc)
updating [===========================================>] 2/2\r (no-eol) (esc)
\r (no-eol) (esc)
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
dir, options -Av
$ rm test/bar
$ remove -Av test
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
\r (no-eol) (esc)
skipping [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
removing test/bar
not removing test/foo: file still exists
exit code: 1
R test/bar
./foo
./test/foo
\r (no-eol) (esc)
updating [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
dir, options -A <dir>
$ rm test/bar
$ remove -A test
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
\r (no-eol) (esc)
skipping [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
removing test/bar
exit code: 1
R test/bar
./foo
./test/foo
\r (no-eol) (esc)
updating [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
without any files/dirs, options -A
$ rm test/bar
$ remove -A
\r (no-eol) (esc)
skipping [=====================> ] 1/2\r (no-eol) (esc)
skipping [===========================================>] 2/2\r (no-eol) (esc)
\r (no-eol) (esc)
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
removing test/bar
exit code: 1
R test/bar
./foo
./test/foo
\r (no-eol) (esc)
updating [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
dir, options -Af
$ rm test/bar
$ remove -Af test
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
\r (no-eol) (esc)
deleting [=====================> ] 1/2\r (no-eol) (esc)
\r (no-eol) (esc)
\r (no-eol) (esc)
deleting [===========================================>] 2/2\r (no-eol) (esc)
\r (no-eol) (esc)
removing test/bar
removing test/foo
exit code: 0
R test/bar
R test/foo
./foo
./test/foo
\r (no-eol) (esc)
updating [===========================================>] 2/2\r (no-eol) (esc)
\r (no-eol) (esc)
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
test remove dropping empty trees (issue1861)
$ mkdir -p issue1861/b/c
$ echo x > issue1861/x
$ echo y > issue1861/b/c/y
$ hg ci -Am add
adding issue1861/b/c/y
adding issue1861/x
$ hg rm issue1861/b
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
removing issue1861/b/c/y
$ hg ci -m remove
$ ls issue1861
x
test that commit does not crash if the user removes a newly added file
$ touch f1
$ hg add f1
$ rm f1
$ hg ci -A -mx
removing f1
nothing changed
[1]
handling of untracked directories and missing files
$ mkdir d1
$ echo a > d1/a
$ hg rm --after d1
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
not removing d1: no tracked files
[1]
$ hg add d1/a
$ rm d1/a
$ hg rm --after d1
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
removing d1/a
$ hg rm --after nosuch
nosuch: * (glob)
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
[1]
test dry-run for remove
$ hg init testdryrun
$ cd testdryrun
$ echo a>a
$ hg ci -qAm1
$ hg remove a -nv
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
removing a
$ hg remove a -nv --color debug
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
\r (no-eol) (esc)
deleting [===========================================>] 1/1\r (no-eol) (esc)
\r (no-eol) (esc)
[addremove.removed ui.status|removing a]
$ hg diff
$ cat >> .hg/hgrc <<EOF
> [extensions]
> largefiles=
> EOF
$ echo 'B as largefile' > B
$ hg add --large B
$ hg ci -m "B"
$ hg remove B -nv
removing B
$ hg st
$ cd ..