sapling/tests/test-dispatch.t
Jun Wu b6101a12e0 clidispatch: rework error handling
Summary:
Change error type in clidispatch from `DispatchError` to `failure::Error`.

Pros:
- `failure` will attach a backtrace for free. (otherwise, backtrace handling is
  manual)
- Wrapping other errors (ex. `io::Error`, `cliparser::Error`) is optional.
  (otherwise, wrapping other errors is mandatory, and needs to be careful to
  not lose information)

Cons:
- No longer able to enumerate *all* possible error types. (but can still
  downcast to specific errors)

This seems to be a good tradeoff especially because of the backtrace handling - I
ran into a few issues where the location where the error happened really helped
debugging.

Since we can no longer enumerate all possible error types, the enum was changed
to individual structs to make the code shorter (ex. the struct can be downcasted
directly, instead of down-casting to the enum, then matching its variant).

The `HighLevelError` handling was simplified and moved to `hgmain`.

The new code path falls back to Python less aggressively, therefore some behaviors
were tweaked (ex. `-R` takes a bundle path).

Reviewed By: sfilipco

Differential Revision: D16796400

fbshipit-source-id: 1b17eb8d62503644b118c6b799778182bf222538
2019-08-21 12:59:28 -07:00

174 lines
4.1 KiB
Perl

$ setconfig extensions.treemanifest=!
test command parsing and dispatch
$ hg init a
$ cd a
Redundant options used to crash (issue436):
$ hg -v log -v
$ hg -v log -v x
$ echo a > a
$ hg ci -Ama
adding a
Missing arg:
$ hg cat
hg cat: invalid arguments
(use 'hg cat -h' to get help)
[255]
Missing parameter for early option:
$ hg log -R 2>&1 | grep 'hg log'
hg log: option -R requires argument
(use 'hg log -h' to get help)
"--" may be an option value:
$ hg -R -- log
abort: repository -- not found!
[255]
$ hg log -R --
abort: repository -- not found!
[255]
$ hg log -T --
-- (no-eol)
$ hg log -T -- -k nomatch
Parsing of early options should stop at "--":
$ hg cat -- --config=hooks.pre-cat=false
--config=hooks.pre-cat=false: no such file in rev cb9a9f314b8b
[1]
$ hg cat -- --debugger
--debugger: no such file in rev cb9a9f314b8b
[1]
Unparsable form of early options:
$ hg cat --debugg
abort: option --debugger may not be abbreviated!
[255]
Parsing failure of early options should be detected before executing the
command:
$ hg log -b '--config=hooks.pre-log=false' default
abort: option --config may not be abbreviated!
[255]
$ hg log -b -R. default
abort: option -R has to be separated from other options (e.g. not -qR) and --repository may only be abbreviated as --repo!
[255]
$ hg log --cwd .. -b --cwd=. default
abort: option --cwd may not be abbreviated!
[255]
However, we can't prevent it from loading extensions and configs:
$ cat <<EOF > bad.py
> raise Exception('bad')
> EOF
$ hg log -b '--config=extensions.bad=bad.py' default
*** failed to import extension bad from bad.py: bad
abort: option --config may not be abbreviated!
[255]
$ mkdir -p badrepo/.hg
$ echo 'invalid-syntax' > badrepo/.hg/hgrc
$ hg log -b -Rbadrepo default
hg: parse error: "$TESTTMP/a/badrepo/.hg/hgrc":
--> 1:15
|
1 | invalid-syntax\xe2\x90\x8a (esc)
| ^---
|
= expected equal_sign
[255]
(XXX: Rust io::Error does not contain path information)
$ hg log -b --cwd=inexistent default
abort: $ENOENT$ (os error *) (glob)
[255]
$ hg log -b '--config=ui.traceback=yes' 2>&1 | grep '^Traceback'
Traceback (most recent call last):
$ hg log -b '--config=profiling.enabled=yes' 2>&1 | grep -i sample
Sample count: .*|No samples recorded\. (re)
Early options can't be specified in [aliases] and [defaults] because they are
applied before the command name is resolved:
$ hg log -b '--config=alias.log=log --config=hooks.pre-log=false'
abort: option --config may not be abbreviated!
[255]
$ hg log -b '--config=defaults.log=--config=hooks.pre-log=false'
abort: option --config may not be abbreviated!
[255]
XXX: Should we support this?
Shell aliases bypass any command parsing rules but for the early one:
$ hg log -b '--config=alias.log=!echo howdy'
abort: option --config may not be abbreviated!
[255]
For compatibility reasons, HGPLAIN=+strictflags is not enabled by plain HGPLAIN:
$ HGPLAIN= hg log --config='hooks.pre-log=false' -b default
abort: pre-log hook exited with status 1
[255]
$ HGPLAINEXCEPT= hg log --cwd .. -q -Ra -b default
0:cb9a9f314b8b
[defaults]
$ hg cat a
a
$ cat >> $HGRCPATH <<EOF
> [defaults]
> cat = -r null
> EOF
$ hg cat a
a: no such file in rev 000000000000
[1]
$ cd "$TESTTMP"
OSError "No such file or directory" / "The system cannot find the path
specified" should include filename even when it is empty
$ hg -R a archive ''
abort: *: '' (glob)
[255]
#if no-outer-repo
No repo:
$ hg cat
abort: no repository found in '$TESTTMP' (.hg not found)!
[255]
#endif
#if rmcwd
Current directory removed:
$ mkdir $TESTTMP/repo1
$ cd $TESTTMP/repo1
$ rm -rf $TESTTMP/repo1
The output could be one of the following and something else:
chg: abort: failed to getcwd (errno = *) (glob)
abort: error getting current working directory: * (glob)
sh: 0: getcwd() failed: $ENOENT$
Since the exact behavior depends on the shell, only check it returns non-zero.
$ HGDEMANDIMPORT=disable hg version -q 2>/dev/null || false
[1]
#endif