upstream/mercurial-mirror Files · tests/test-strip-branch-cache.t

branchcache: explicitly track inheritence "state"...

branchcache: explicitly track inheritence "state" We move from a binary "dirty" flag to a three value "state": "clean", "inherited", "dirty". The "inherited" means that the branch cache is not only "clean", but it is a duplicate of its parent filter. If a branch cache is "inherited", we can non only skip writing its value on disk, but it is a good idea to delete any stale value on disk, as those will just waste time (and possibly induce bug) in the future. We only do this in the update related to transaction or explicit cache update (e.g `hg debugupdatecache`). Deleting the file when we simply detected a stall cache during a read only operation seems more dangerous. We rename `copy` to `inherit_for` to clarify we associate a stronger semantic to the operation.

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      This test cover a bug that no longer exist.

      Define helpers.

        $ hg_log () { hg log -G -T "{rev}:{node|short}"; }

        $ commit () { echo "foo - ${2:-$1}" > $1; hg commit -Aqm "Edited $1"; }

        $ strip() { hg --config extensions.strip= strip -q -r "$1" ; }

      Setup hg repo.

        $ hg init repo

        $ cd repo

        $ touch x; hg add x; hg commit -m "initial"

        $ hg clone -q . ../clone

        $ commit a

        $ cd ../clone

        $ commit b

        $ hg pull -q ../repo

        $ ls -1 .hg/cache/branch?*

        .hg/cache/branch2-base

        .hg/cache/branch2-served

        $ cat .hg/cache/branch?-served

        222ae9789a75703f9836e44de7db179cbfd420ee 2

        a3498d6e39376d2456425dd8c692367bdbf00fa2 o default

        222ae9789a75703f9836e44de7db179cbfd420ee o default

        $ hg_log

        o  2:222ae9789a75

        |

        | @  1:a3498d6e3937

        |/

        o  0:7ab0a3bd758a

        $ strip '1:'

      After the strip the "served" cache is now identical to the "base" one, and the

      older one have been actively deleted.

        $ ls -1 .hg/cache/branch?*

        .hg/cache/branch2-base

        $ cat .hg/cache/branch?-base

        7ab0a3bd758a58b9f79557ce708533e627776cce 0

        7ab0a3bd758a58b9f79557ce708533e627776cce o default

      We do a new commit and we get a new valid branchmap for the served version

        $ commit c

        $ ls -1 .hg/cache/branch?*

        .hg/cache/branch2-base

        .hg/cache/branch2-served

        $ cat .hg/cache/branch?-served

        a1602b357cfca067600406eb19060c7128804d72 1

        a1602b357cfca067600406eb19060c7128804d72 o default

      On pull we end up with the same tip, and so wrongly reuse the invalid cache and crash.

        $ hg pull ../repo --quiet

        $ hg heads -T '{rev} {node} {branch}\n'

        2 222ae9789a75703f9836e44de7db179cbfd420ee default

        1 a1602b357cfca067600406eb19060c7128804d72 default

        $ ls -1 .hg/cache/branch?*

        .hg/cache/branch2-base

        .hg/cache/branch2-served

        $ cat .hg/cache/branch?-served

        222ae9789a75703f9836e44de7db179cbfd420ee 2

        a1602b357cfca067600406eb19060c7128804d72 o default

        222ae9789a75703f9836e44de7db179cbfd420ee o default

	Site-wide shortcuts
/	Use quick search box
g h	Goto home page
g g	Goto my private gists page
g G	Goto my public gists page
g 0-9	Goto bookmarked items from 0-9
n r	New repository page
n g	New gist page

	Repositories
g s	Goto summary page
g c	Goto changelog page
g f	Goto files page
g F	Goto files page with file search activated
g p	Goto pull requests page
g o	Goto repository settings
g O	Goto repository access permissions settings
t s	Toggle sidebar on some pages

				This test cover a bug that no longer exist.

				Define helpers.

				$ hg_log () { hg log -G -T "{rev}:{node\|short}"; }
				$ commit () { echo "foo - ${2:-$1}" > $1; hg commit -Aqm "Edited $1"; }
				$ strip() { hg --config extensions.strip= strip -q -r "$1" ; }

				Setup hg repo.

				$ hg init repo
				$ cd repo
				$ touch x; hg add x; hg commit -m "initial"
				$ hg clone -q . ../clone
				$ commit a

				$ cd ../clone

				$ commit b

				$ hg pull -q ../repo

				$ ls -1 .hg/cache/branch?*
				.hg/cache/branch2-base
				.hg/cache/branch2-served
				$ cat .hg/cache/branch?-served
				222ae9789a75703f9836e44de7db179cbfd420ee 2
				a3498d6e39376d2456425dd8c692367bdbf00fa2 o default
				222ae9789a75703f9836e44de7db179cbfd420ee o default

				$ hg_log
				o 2:222ae9789a75
				\|
				\| @ 1:a3498d6e3937
				\|/
				o 0:7ab0a3bd758a


				$ strip '1:'

				After the strip the "served" cache is now identical to the "base" one, and the
				older one have been actively deleted.

				$ ls -1 .hg/cache/branch?*
				.hg/cache/branch2-base
				$ cat .hg/cache/branch?-base
				7ab0a3bd758a58b9f79557ce708533e627776cce 0
				7ab0a3bd758a58b9f79557ce708533e627776cce o default

				We do a new commit and we get a new valid branchmap for the served version

				$ commit c
				$ ls -1 .hg/cache/branch?*
				.hg/cache/branch2-base
				.hg/cache/branch2-served
				$ cat .hg/cache/branch?-served
				a1602b357cfca067600406eb19060c7128804d72 1
				a1602b357cfca067600406eb19060c7128804d72 o default


				On pull we end up with the same tip, and so wrongly reuse the invalid cache and crash.

				$ hg pull ../repo --quiet
				$ hg heads -T '{rev} {node} {branch}\n'
				2 222ae9789a75703f9836e44de7db179cbfd420ee default
				1 a1602b357cfca067600406eb19060c7128804d72 default
				$ ls -1 .hg/cache/branch?*
				.hg/cache/branch2-base
				.hg/cache/branch2-served
				$ cat .hg/cache/branch?-served
				222ae9789a75703f9836e44de7db179cbfd420ee 2
				a1602b357cfca067600406eb19060c7128804d72 o default
				222ae9789a75703f9836e44de7db179cbfd420ee o default