upstream/mercurial-mirror Files · tests/test-issue522.t

show: use consistent (and possibly shorter) node lengths...

show: use consistent (and possibly shorter) node lengths `hg show` makes heavy use of shortest() to limit the length of the node hash. For the "stack" and "work" views, you are often looking at multiple lines of similar output for "lines" of work. It is visually appeasing for things to vertically align. A naive use of {shortest(node, N)} could result in variable length nodes and for the first character of the description to vary by a column or two. We implement a function to determine the longest shortest prefix for a set of revisions. The new function is used to determine the printed node length for all `hg show` views. .. feature:: show: use consistent node length in views Our previous shortest node length of 5 was arbitrarily chosen. shortest() already does the work of ensuring that a partial node isn't ambiguous with an integer revision, which is our primary risk of a collision for very short nodes. It should be safe to go with the shortest node possible. Existing code is also optimized to handle nodes as short as 4. So, we decrease the minimum hash length from 5 to 4. We also add a test demonstrating that prefix collisions increase the node length. .. feature:: show: decrease minimum displayed hash length from 5 to 4 Differential Revision: https://phab.mercurial-scm.org/D558

Matt Mackall - - Load All Authors

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      https://bz.mercurial-scm.org/522

      In the merge below, the file "foo" has the same contents in both

      parents, but if we look at the file-level history, we'll notice that

      the version in p1 is an ancestor of the version in p2. This test makes

      sure that we'll use the version from p2 in the manifest of the merge

      revision.

        $ hg init

        $ echo foo > foo

        $ hg ci -qAm 'add foo'

        $ echo bar >> foo

        $ hg ci -m 'change foo'

        $ hg backout -r tip -m 'backout changed foo'

        reverting foo

        changeset 2:4d9e78aaceee backs out changeset 1:b515023e500e

        $ hg up -C 0

        1 files updated, 0 files merged, 0 files removed, 0 files unresolved

        $ touch bar

        $ hg ci -qAm 'add bar'

        $ hg merge --debug

          searching for copies back to rev 1

          unmatched files in local:

           bar

        resolving manifests

         branchmerge: True, force: False, partial: False

         ancestor: bbd179dfa0a7, local: 71766447bdbb+, remote: 4d9e78aaceee

         foo: remote is newer -> g

        getting foo

        1 files updated, 0 files merged, 0 files removed, 0 files unresolved

        (branch merge, don't forget to commit)

        $ hg debugstate | grep foo

        m   0         -2 unset               foo

        $ hg st -A foo

        M foo

        $ hg ci -m 'merge'

        $ hg manifest --debug | grep foo

        c6fc755d7e68f49f880599da29f15add41f42f5a 644   foo

        $ hg debugindex foo

           rev    offset  length  ..... linkrev nodeid       p1           p2 (re)

             0         0       5  .....       0 2ed2a3912a0b 000000000000 000000000000 (re)

             1         5       9  .....       1 6f4310b00b9a 2ed2a3912a0b 000000000000 (re)

             2        14       5  .....       2 c6fc755d7e68 6f4310b00b9a 000000000000 (re)

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				https://bz.mercurial-scm.org/522

				In the merge below, the file "foo" has the same contents in both
				parents, but if we look at the file-level history, we'll notice that
				the version in p1 is an ancestor of the version in p2. This test makes
				sure that we'll use the version from p2 in the manifest of the merge
				revision.

				$ hg init

				$ echo foo > foo
				$ hg ci -qAm 'add foo'

				$ echo bar >> foo
				$ hg ci -m 'change foo'

				$ hg backout -r tip -m 'backout changed foo'
				reverting foo
				changeset 2:4d9e78aaceee backs out changeset 1:b515023e500e

				$ hg up -C 0
				1 files updated, 0 files merged, 0 files removed, 0 files unresolved

				$ touch bar
				$ hg ci -qAm 'add bar'

				$ hg merge --debug
				searching for copies back to rev 1
				unmatched files in local:
				bar
				resolving manifests
				branchmerge: True, force: False, partial: False
				ancestor: bbd179dfa0a7, local: 71766447bdbb+, remote: 4d9e78aaceee
				foo: remote is newer -> g
				getting foo
				1 files updated, 0 files merged, 0 files removed, 0 files unresolved
				(branch merge, don't forget to commit)

				$ hg debugstate \| grep foo
				m 0 -2 unset foo

				$ hg st -A foo
				M foo

				$ hg ci -m 'merge'

				$ hg manifest --debug \| grep foo
				c6fc755d7e68f49f880599da29f15add41f42f5a 644 foo

				$ hg debugindex foo
				rev offset length ..... linkrev nodeid p1 p2 (re)
				0 0 5 ..... 0 2ed2a3912a0b 000000000000 000000000000 (re)
				1 5 9 ..... 1 6f4310b00b9a 2ed2a3912a0b 000000000000 (re)
				2 14 5 ..... 2 c6fc755d7e68 6f4310b00b9a 000000000000 (re)