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Fix long-standing excessive file merges Since switching to the multihead approach, we've been creating excessive file-level merges where files are marked as merged with their ancestors. This explicitly checks at commit time whether the two parent versions are linearly related, and if so, reduces the file check-in to a non-merge. Then the file is compared against the remaining parent, and, if equal, skips check-in of that file (as it's not changed). Since we're not checking in all files that were different between versions, we no longer need to mark so many files for merge. This removes most of the 'm' state marking as well. Finally, it is possible to do a tree-level merge with no file-level changes. This will happen if one user changes file A and another changes file B. Thus, if we have have two parents, we allow commit to proceed even if there are no file-level changes.
author mpm@selenic.com
date Sun, 21 Aug 2005 21:59:55 -0700
parents
children 6f274afc05c7
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-filebranch	Sun Aug 21 21:59:55 2005 -0700
@@ -0,0 +1,73 @@
+#!/bin/sh
+
+# This test makes sure that we don't mark a file as merged with its ancestor
+# when we do a merge.
+
+cat <<'EOF' > merge
+#!/bin/sh
+echo merging for `basename $1`
+EOF
+chmod +x merge
+
+echo creating base
+hg init a
+cd a
+echo 1 > foo
+echo 1 > bar
+echo 1 > baz
+echo 1 > quux
+hg add foo bar baz quux
+hg commit -m "base" -d "0 0"
+
+cd ..
+hg clone a b
+
+echo creating branch a
+cd a
+echo 2a > foo
+echo 2a > bar
+hg commit -m "branch a" -d "0 0"
+
+echo creating branch b
+
+cd ..
+cd b
+echo 2b > foo
+echo 2b > baz
+hg commit -m "branch b" -d "0 0"
+
+echo "we shouldn't have anything but n state here"
+hg debugstate | cut -b 1-16,35-
+
+echo merging
+hg pull ../a
+env HGMERGE=../merge hg update -vm --debug
+
+echo 2m > foo
+echo 2b > baz
+echo new > quux
+
+echo "we shouldn't have anything but foo in merge state here"
+hg debugstate | cut -b 1-16,35- | grep "^m"
+
+hg ci -m "merge" -d "0 0"
+
+echo "main: we should have a merge here"
+hg debugindex .hg/00changelog.i
+
+echo "foo: we should have a merge here"
+hg debugindex .hg/data/foo.i
+
+echo "bar: we shouldn't have a merge here"
+hg debugindex .hg/data/bar.i
+
+echo "baz: we shouldn't have a merge here"
+hg debugindex .hg/data/baz.i
+
+echo "quux: we shouldn't have a merge here"
+hg debugindex .hg/data/quux.i
+
+echo "everything should be clean now"
+hg status
+
+hg verify