rhg: add a test for --rev with a hex changeset ID

And fix error message formatting

Differential Revision: https://phab.mercurial-scm.org/D9478

tests/test-rhg.t

@@ -1,147 +1,167
 #require rust
 
 Define an rhg function that will only run if rhg exists
   $ rhg() {
   > if [ -f "$RUNTESTDIR/../rust/target/debug/rhg" ]; then
   >   "$RUNTESTDIR/../rust/target/debug/rhg" "$@"
   > else
   >   echo "skipped: Cannot find rhg. Try to run cargo build in rust/rhg."
   >   exit 80
   > fi
   > }
 
 Unimplemented command
   $ rhg unimplemented-command
   error: Found argument 'unimplemented-command' which wasn't expected, or isn't valid in this context
   
   USAGE:
       rhg <SUBCOMMAND>
   
   For more information try --help
   [252]
 
 Finding root
   $ rhg root
   abort: no repository found in '$TESTTMP' (.hg not found)!
   [255]
 
   $ hg init repository
   $ cd repository
   $ rhg root
   $TESTTMP/repository
 
 Unwritable file descriptor
   $ rhg root > /dev/full
   abort: No space left on device (os error 28)
   [255]
 
 Deleted repository
   $ rm -rf `pwd`
   $ rhg root
   abort: error getting current working directory: $ENOENT$
   [255]
 
 Listing tracked files
   $ cd $TESTTMP
   $ hg init repository
   $ cd repository
   $ for i in 1 2 3; do
   >   echo $i >> file$i
   >   hg add file$i
   > done
   > hg commit -m "commit $i" -q
 
 Listing tracked files from root
   $ rhg files
   file1
   file2
   file3
 
 Listing tracked files from subdirectory
   $ mkdir -p path/to/directory
   $ cd path/to/directory
   $ rhg files
   ../../../file1
   ../../../file2
   ../../../file3
 
 Listing tracked files through broken pipe
   $ rhg files | head -n 1
   ../../../file1
 
 Debuging data in inline index
   $ cd $TESTTMP
   $ rm -rf repository
   $ hg init repository
   $ cd repository
   $ for i in 1 2 3; do
   >   echo $i >> file$i
   >   hg add file$i
   >   hg commit -m "commit $i" -q
   > done
   $ rhg debugdata -c 2
   e36fa63d37a576b27a69057598351db6ee5746bd
   test
   0 0
   file3
   
   commit 3 (no-eol)
   $ rhg debugdata -m 2
   file1\x00b8e02f6433738021a065f94175c7cd23db5f05be (esc)
   file2\x005d9299349fc01ddd25d0070d149b124d8f10411e (esc)
   file3\x002661d26c649684b482d10f91960cc3db683c38b4 (esc)
 
 Debuging with full node id
   $ rhg debugdata -c `hg log -r 0 -T '{node}'`
   c8e64718e1ca0312eeee0f59d37f8dc612793856
   test
   0 0
   file1
   
   commit 1 (no-eol)
 
 Cat files
   $ cd $TESTTMP
   $ rm -rf repository
   $ hg init repository
   $ cd repository
   $ echo "original content" > original
   $ hg add original
   $ hg commit -m "add original" original
   $ rhg cat -r 0 original
   original content
 Cat copied file should not display copy metadata
   $ hg copy original copy_of_original
   $ hg commit -m "add copy of original"
   $ rhg cat -r 1 copy_of_original
   original content
 
+Specifying revisions by changeset ID
+  $ hg log
+  changeset:   1:41263439dc17
+  tag:         tip
+  user:        test
+  date:        Thu Jan 01 00:00:00 1970 +0000
+  summary:     add copy of original
+  
+  changeset:   0:1c9e69808da7
+  user:        test
+  date:        Thu Jan 01 00:00:00 1970 +0000
+  summary:     add original
+  
+  $ rhg files -r 41263439dc17
+  abort: invalid revision identifier 41263439dc17
+  [255]
+  $ rhg cat -r 41263439dc17 original
+  abort: invalid revision identifier 41263439dc17
+  [255]
+
 Requirements
   $ rhg debugrequirements
   dotencode
   fncache
   generaldelta
   revlogv1
   sparserevlog
   store
 
   $ echo indoor-pool >> .hg/requires
   $ rhg files
   [252]
 
   $ rhg cat -r 1 copy_of_original
   [252]
 
   $ rhg debugrequirements
   dotencode
   fncache
   generaldelta
   revlogv1
   sparserevlog
   store
   indoor-pool
 
   $ echo -e '\xFF' >> .hg/requires
   $ rhg debugrequirements
   abort: .hg/requires is corrupted
   [255]