filemerge: when using in-memory merge, always put backup files in temp dir
Before calling a merge tool, we create a backup of the local side of
the merge. That file can be put in the working copy or in a temporary
directory, depending on the user's config. When we're merging in
memory, we don't want to write to the actual, on-disk working copy, so
we write the file to the in-memory working copy instead. However,
since we don't support external merge tools with in-memory merge, it
makes no difference where the file is actually stored (and if we ever
do add support for external merge tools, then the file clearly can't
live in the in-memory working-copy object anyway). So, since it
doesn't matter where the file is stored, we can simplify by always
putting them in the system's temp directory.
Differential Revision: https://phab.mercurial-scm.org/D12187
Make sure that the internal merge tools (internal:fail, internal:local,
internal:union and internal:other) are used when matched by a
merge-pattern in hgrc
Make sure HGMERGE doesn't interfere with the test:
$ unset HGMERGE
$ hg init
Initial file contents:
$ echo "line 1" > f
$ echo "line 2" >> f
$ echo "line 3" >> f
$ hg ci -Am "revision 0"
adding f
$ cat f
line 1
line 2
line 3
Branch 1: editing line 1:
$ sed 's/line 1/first line/' f > f.new
$ mv f.new f
$ hg ci -Am "edited first line"
Branch 2: editing line 3:
$ hg update 0
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ sed 's/line 3/third line/' f > f.new
$ mv f.new f
$ hg ci -Am "edited third line"
created new head
Merge using internal:fail tool:
$ echo "[merge-patterns]" > .hg/hgrc
$ echo "* = internal:fail" >> .hg/hgrc
$ hg merge
0 files updated, 0 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
[1]
$ cat f
line 1
line 2
third line
$ hg stat
M f
Merge using internal:local tool:
$ hg update -C 2
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ sed 's/internal:fail/internal:local/' .hg/hgrc > .hg/hgrc.new
$ mv .hg/hgrc.new .hg/hgrc
$ hg merge
0 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ cat f
line 1
line 2
third line
$ hg stat
M f
Merge using internal:other tool:
$ hg update -C 2
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ sed 's/internal:local/internal:other/' .hg/hgrc > .hg/hgrc.new
$ mv .hg/hgrc.new .hg/hgrc
$ hg merge
0 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ cat f
first line
line 2
line 3
$ hg stat
M f
Merge using default tool:
$ hg update -C 2
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ rm .hg/hgrc
$ hg merge
merging f
0 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ cat f
first line
line 2
third line
$ hg stat
M f
Merge using internal:union tool:
$ hg update -C 2
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo "line 4a" >>f
$ hg ci -Am "Adding fourth line (commit 4)"
$ hg update 2
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo "line 4b" >>f
$ hg ci -Am "Adding fourth line v2 (commit 5)"
created new head
$ echo "[merge-patterns]" > .hg/hgrc
$ echo "* = internal:union" >> .hg/hgrc
$ hg merge 3
merging f
0 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ cat f
line 1
line 2
third line
line 4b
line 4a