tests: allow Google's internal builds of clang-format to be used
These builds do not actually include any Google-specific formatting changes; the
only reason they don't include the LLVM version number is due to a decision to
elide the version number from *all* LLVM/clang projects.
For most builds of clang-format, even "unofficial" ones, the LLVM version will
be displayed; example:
```
clang-format version 14.0.0 (https://github.com/llvm/llvm-project.git 1830ec94ac022ae0b6d6876fc2251e6b91e5931e)
```
The Google-internal build looks like this:
```
clang-format version google3-trunk (1830ec94ac022ae0b6d6876fc2251e6b91e5931e)
```
Differential Revision: https://phab.mercurial-scm.org/D10538
#require unix-permissions no-root reporevlogstore
#testcases dirstate-v1 dirstate-v1-tree dirstate-v2
#if dirstate-v1-tree
#require rust
$ echo '[experimental]' >> $HGRCPATH
$ echo 'dirstate-tree.in-memory=1' >> $HGRCPATH
#endif
#if dirstate-v2
#require rust
$ echo '[format]' >> $HGRCPATH
$ echo 'exp-dirstate-v2=1' >> $HGRCPATH
#endif
$ hg init t
$ cd t
$ echo foo > a
$ hg add a
$ hg commit -m "1"
$ hg verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
checked 1 changesets with 1 changes to 1 files
$ chmod -r .hg/store/data/a.i
$ hg verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
abort: Permission denied: '$TESTTMP/t/.hg/store/data/a.i'
[255]
$ chmod +r .hg/store/data/a.i
$ hg verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
checked 1 changesets with 1 changes to 1 files
$ chmod -w .hg/store/data/a.i
$ echo barber > a
$ hg commit -m "2"
trouble committing a!
abort: Permission denied: '$TESTTMP/t/.hg/store/data/a.i'
[255]
$ chmod -w .
$ hg diff --nodates
diff -r 2a18120dc1c9 a
--- a/a
+++ b/a
@@ -1,1 +1,1 @@
-foo
+barber
$ chmod +w .
$ chmod +w .hg/store/data/a.i
$ mkdir dir
$ touch dir/a
$ hg status
M a
? dir/a
$ chmod -rx dir
#if no-fsmonitor
(fsmonitor makes "hg status" avoid accessing to "dir")
$ hg status
dir: Permission denied
M a
#endif
Reenable perm to allow deletion:
$ chmod +rx dir
$ cd ..