Mercurial > hg
diff tests/test-graft-rename.t @ 44041:fa808e65eabb
tests: split out another ~1/2 of test-graft.t
The tests involving renames were also quite independent from the rest.
Differential Revision: https://phab.mercurial-scm.org/D7803
author | Martin von Zweigbergk <martinvonz@google.com> |
---|---|
date | Fri, 27 Dec 2019 15:53:16 -0800 |
parents | tests/test-graft.t@58db8f63f4e2 |
children | 3df0bd706c40 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/tests/test-graft-rename.t Fri Dec 27 15:53:16 2019 -0800 @@ -0,0 +1,733 @@ + +Graft from behind a move or rename +================================== + +NOTE: This is affected by issue5343, and will need updating when it's fixed + +Consider this topology for a regular graft: + +o c1 +| +| o c2 +| | +| o ca # stands for "common ancestor" +|/ +o cta # stands for "common topological ancestor" + +Note that in issue5343, ca==cta. + +The following table shows the possible cases. Here, "x->y" and, equivalently, +"y<-x", where x is an ancestor of y, means that some copy happened from x to y. + +name | c1<-cta | cta<->ca | ca->c2 +A.0 | | | +A.1 | X | | +A.2 | | X | +A.3 | | | X +A.4 | X | X | +A.5 | X | | X +A.6 | | X | X +A.7 | X | X | X + +A.0 is trivial, and doesn't need copy tracking. +For A.1, a forward rename is recorded in the c1 pass, to be followed later. +In A.2, the rename is recorded in the c2 pass and followed backwards. +A.3 is recorded in the c2 pass as a forward rename to be duplicated on target. +In A.4, both passes of checkcopies record incomplete renames, which are +then joined in mergecopies to record a rename to be followed. +In A.5 and A.7, the c1 pass records an incomplete rename, while the c2 pass +records an incomplete divergence. The incomplete rename is then joined to the +appropriate side of the incomplete divergence, and the result is recorded as a +divergence. The code doesn't distinguish at all between these two cases, since +the end result of them is the same: an incomplete divergence joined with an +incomplete rename into a divergence. +Finally, A.6 records a divergence entirely in the c2 pass. + +A.4 has a degenerate case a<-b<-a->a, where checkcopies isn't needed at all. +A.5 has a special case a<-b<-b->a, which is treated like a<-b->a in a merge. +A.5 has issue5343 as a special case. +A.6 has a special case a<-a<-b->a. Here, checkcopies will find a spurious +incomplete divergence, which is in fact complete. This is handled later in +mergecopies. +A.7 has 4 special cases: a<-b<-a->b (the "ping-pong" case), a<-b<-c->b, +a<-b<-a->c and a<-b<-c->a. Of these, only the "ping-pong" case is interesting, +the others are fairly trivial (a<-b<-c->b and a<-b<-a->c proceed like the base +case, a<-b<-c->a is treated the same as a<-b<-b->a). + +f5a therefore tests the "ping-pong" rename case, where a file is renamed to the +same name on both branches, then the rename is backed out on one branch, and +the backout is grafted to the other branch. This creates a challenging rename +sequence of a<-b<-a->b in the graft target, topological CA, graft CA and graft +source, respectively. Since rename detection will run on the c1 side for such a +sequence (as for technical reasons, we split the c1 and c2 sides not at the +graft CA, but rather at the topological CA), it will pick up a false rename, +and cause a spurious merge conflict. This false rename is always exactly the +reverse of the true rename that would be detected on the c2 side, so we can +correct for it by detecting this condition and reversing as necessary. + +First, set up the repository with commits to be grafted + + $ hg init graftmove + $ cd graftmove + $ echo c1a > f1a + $ echo c2a > f2a + $ echo c3a > f3a + $ echo c4a > f4a + $ echo c5a > f5a + $ hg ci -qAm A0 + $ hg mv f1a f1b + $ hg mv f3a f3b + $ hg mv f5a f5b + $ hg ci -qAm B0 + $ echo c1c > f1b + $ hg mv f2a f2c + $ hg mv f5b f5a + $ echo c5c > f5a + $ hg ci -qAm C0 + $ hg mv f3b f3d + $ echo c4d > f4a + $ hg ci -qAm D0 + $ hg log -G + @ changeset: 3:b69f5839d2d9 + | tag: tip + | user: test + | date: Thu Jan 01 00:00:00 1970 +0000 + | summary: D0 + | + o changeset: 2:f58c7e2b28fa + | user: test + | date: Thu Jan 01 00:00:00 1970 +0000 + | summary: C0 + | + o changeset: 1:3d7bba921b5d + | user: test + | date: Thu Jan 01 00:00:00 1970 +0000 + | summary: B0 + | + o changeset: 0:11f7a1b56675 + user: test + date: Thu Jan 01 00:00:00 1970 +0000 + summary: A0 + + +Test the cases A.2 (f1x), A.3 (f2x) and a special case of A.6 (f5x) where the +two renames actually converge to the same name (thus no actual divergence). + + $ hg up -q 'desc("A0")' + $ HGEDITOR="echo C1 >" hg graft -r 'desc("C0")' --edit + grafting 2:f58c7e2b28fa "C0" + merging f1a and f1b to f1a + merging f5a + warning: can't find ancestor for 'f5a' copied from 'f5b'! + $ hg status --change . + M f1a + M f5a + A f2c + R f2a + $ hg cat f1a + c1c + $ hg cat f1b + f1b: no such file in rev c9763722f9bd + [1] + +Test the cases A.0 (f4x) and A.6 (f3x) + + $ HGEDITOR="echo D1 >" hg graft -r 'desc("D0")' --edit + grafting 3:b69f5839d2d9 "D0" + note: possible conflict - f3b was renamed multiple times to: + f3a + f3d + warning: can't find ancestor for 'f3d' copied from 'f3b'! + +Set up the repository for some further tests + + $ hg up -q "min(desc("A0"))" + $ hg mv f1a f1e + $ echo c2e > f2a + $ hg mv f3a f3e + $ hg mv f4a f4e + $ hg mv f5a f5b + $ hg ci -qAm "E0" + $ hg up -q "min(desc("A0"))" + $ hg cp f1a f1f + $ hg ci -qAm "F0" + $ hg up -q "min(desc("A0"))" + $ hg cp f1a f1g + $ echo c1g > f1g + $ hg ci -qAm "G0" + $ hg log -G + @ changeset: 8:ba67f08fb15a + | tag: tip + | parent: 0:11f7a1b56675 + | user: test + | date: Thu Jan 01 00:00:00 1970 +0000 + | summary: G0 + | + | o changeset: 7:d376ab0d7fda + |/ parent: 0:11f7a1b56675 + | user: test + | date: Thu Jan 01 00:00:00 1970 +0000 + | summary: F0 + | + | o changeset: 6:6bd1736cab86 + |/ parent: 0:11f7a1b56675 + | user: test + | date: Thu Jan 01 00:00:00 1970 +0000 + | summary: E0 + | + | o changeset: 5:560daee679da + | | user: test + | | date: Thu Jan 01 00:00:00 1970 +0000 + | | summary: D1 + | | + | o changeset: 4:c9763722f9bd + |/ parent: 0:11f7a1b56675 + | user: test + | date: Thu Jan 01 00:00:00 1970 +0000 + | summary: C1 + | + | o changeset: 3:b69f5839d2d9 + | | user: test + | | date: Thu Jan 01 00:00:00 1970 +0000 + | | summary: D0 + | | + | o changeset: 2:f58c7e2b28fa + | | user: test + | | date: Thu Jan 01 00:00:00 1970 +0000 + | | summary: C0 + | | + | o changeset: 1:3d7bba921b5d + |/ user: test + | date: Thu Jan 01 00:00:00 1970 +0000 + | summary: B0 + | + o changeset: 0:11f7a1b56675 + user: test + date: Thu Jan 01 00:00:00 1970 +0000 + summary: A0 + + +Test the cases A.4 (f1x), the "ping-pong" special case of A.7 (f5x), +and A.3 with a local content change to be preserved (f2x). + + $ hg up -q "desc("E0")" + $ HGEDITOR="echo C2 >" hg graft -r 'desc("C0")' --edit + grafting 2:f58c7e2b28fa "C0" + merging f1e and f1b to f1e + merging f2a and f2c to f2c + +Test the cases A.1 (f4x) and A.7 (f3x). + + $ HGEDITOR="echo D2 >" hg graft -r 'desc("D0")' --edit + grafting 3:b69f5839d2d9 "D0" + note: possible conflict - f3b was renamed multiple times to: + f3d + f3e + merging f4e and f4a to f4e + warning: can't find ancestor for 'f3d' copied from 'f3b'! + + $ hg cat f2c + c2e + +Test the case A.5 (move case, f1x). + + $ hg up -q "desc("C0")" +BROKEN: Shouldn't get the warning about missing ancestor + $ HGEDITOR="echo E1 >" hg graft -r 'desc("E0")' --edit + grafting 6:6bd1736cab86 "E0" + note: possible conflict - f1a was renamed multiple times to: + f1b + f1e + note: possible conflict - f3a was renamed multiple times to: + f3b + f3e + merging f2c and f2a to f2c + merging f5a and f5b to f5b + warning: can't find ancestor for 'f1e' copied from 'f1a'! + warning: can't find ancestor for 'f3e' copied from 'f3a'! + $ cat f1e + c1a + +Test the case A.5 (copy case, f1x). + + $ hg up -q "desc("C0")" +BROKEN: Shouldn't get the warning about missing ancestor + $ HGEDITOR="echo F1 >" hg graft -r 'desc("F0")' --edit + grafting 7:d376ab0d7fda "F0" + warning: can't find ancestor for 'f1f' copied from 'f1a'! +BROKEN: f1f should be marked a copy from f1b + $ hg st --copies --change . + A f1f +BROKEN: f1f should have the new content from f1b (i.e. "c1c") + $ cat f1f + c1a + +Test the case A.5 (copy+modify case, f1x). + + $ hg up -q "desc("C0")" +BROKEN: We should get a merge conflict from the 3-way merge between f1b in C0 +(content "c1c") and f1g in G0 (content "c1g") with f1a in A0 as base (content +"c1a") + $ HGEDITOR="echo G1 >" hg graft -r 'desc("G0")' --edit + grafting 8:ba67f08fb15a "G0" + warning: can't find ancestor for 'f1g' copied from 'f1a'! + +Check the results of the grafts tested + + $ hg log -CGv --patch --git + @ changeset: 13:ef3adf6c20a4 + | tag: tip + | parent: 2:f58c7e2b28fa + | user: test + | date: Thu Jan 01 00:00:00 1970 +0000 + | files: f1g + | description: + | G1 + | + | + | diff --git a/f1g b/f1g + | new file mode 100644 + | --- /dev/null + | +++ b/f1g + | @@ -0,0 +1,1 @@ + | +c1g + | + | o changeset: 12:b5542d755b54 + |/ parent: 2:f58c7e2b28fa + | user: test + | date: Thu Jan 01 00:00:00 1970 +0000 + | files: f1f + | description: + | F1 + | + | + | diff --git a/f1f b/f1f + | new file mode 100644 + | --- /dev/null + | +++ b/f1f + | @@ -0,0 +1,1 @@ + | +c1a + | + | o changeset: 11:f8a162271246 + |/ parent: 2:f58c7e2b28fa + | user: test + | date: Thu Jan 01 00:00:00 1970 +0000 + | files: f1e f2c f3e f4a f4e f5a f5b + | copies: f4e (f4a) f5b (f5a) + | description: + | E1 + | + | + | diff --git a/f1e b/f1e + | new file mode 100644 + | --- /dev/null + | +++ b/f1e + | @@ -0,0 +1,1 @@ + | +c1a + | diff --git a/f2c b/f2c + | --- a/f2c + | +++ b/f2c + | @@ -1,1 +1,1 @@ + | -c2a + | +c2e + | diff --git a/f3e b/f3e + | new file mode 100644 + | --- /dev/null + | +++ b/f3e + | @@ -0,0 +1,1 @@ + | +c3a + | diff --git a/f4a b/f4e + | rename from f4a + | rename to f4e + | diff --git a/f5a b/f5b + | rename from f5a + | rename to f5b + | + | o changeset: 10:93ee502e8b0a + | | user: test + | | date: Thu Jan 01 00:00:00 1970 +0000 + | | files: f3d f4e + | | description: + | | D2 + | | + | | + | | diff --git a/f3d b/f3d + | | new file mode 100644 + | | --- /dev/null + | | +++ b/f3d + | | @@ -0,0 +1,1 @@ + | | +c3a + | | diff --git a/f4e b/f4e + | | --- a/f4e + | | +++ b/f4e + | | @@ -1,1 +1,1 @@ + | | -c4a + | | +c4d + | | + | o changeset: 9:539cf145f496 + | | parent: 6:6bd1736cab86 + | | user: test + | | date: Thu Jan 01 00:00:00 1970 +0000 + | | files: f1e f2a f2c f5a f5b + | | copies: f2c (f2a) f5a (f5b) + | | description: + | | C2 + | | + | | + | | diff --git a/f1e b/f1e + | | --- a/f1e + | | +++ b/f1e + | | @@ -1,1 +1,1 @@ + | | -c1a + | | +c1c + | | diff --git a/f2a b/f2c + | | rename from f2a + | | rename to f2c + | | diff --git a/f5b b/f5a + | | rename from f5b + | | rename to f5a + | | --- a/f5b + | | +++ b/f5a + | | @@ -1,1 +1,1 @@ + | | -c5a + | | +c5c + | | + | | o changeset: 8:ba67f08fb15a + | | | parent: 0:11f7a1b56675 + | | | user: test + | | | date: Thu Jan 01 00:00:00 1970 +0000 + | | | files: f1g + | | | copies: f1g (f1a) + | | | description: + | | | G0 + | | | + | | | + | | | diff --git a/f1a b/f1g + | | | copy from f1a + | | | copy to f1g + | | | --- a/f1a + | | | +++ b/f1g + | | | @@ -1,1 +1,1 @@ + | | | -c1a + | | | +c1g + | | | + | | | o changeset: 7:d376ab0d7fda + | | |/ parent: 0:11f7a1b56675 + | | | user: test + | | | date: Thu Jan 01 00:00:00 1970 +0000 + | | | files: f1f + | | | copies: f1f (f1a) + | | | description: + | | | F0 + | | | + | | | + | | | diff --git a/f1a b/f1f + | | | copy from f1a + | | | copy to f1f + | | | + | o | changeset: 6:6bd1736cab86 + | |/ parent: 0:11f7a1b56675 + | | user: test + | | date: Thu Jan 01 00:00:00 1970 +0000 + | | files: f1a f1e f2a f3a f3e f4a f4e f5a f5b + | | copies: f1e (f1a) f3e (f3a) f4e (f4a) f5b (f5a) + | | description: + | | E0 + | | + | | + | | diff --git a/f1a b/f1e + | | rename from f1a + | | rename to f1e + | | diff --git a/f2a b/f2a + | | --- a/f2a + | | +++ b/f2a + | | @@ -1,1 +1,1 @@ + | | -c2a + | | +c2e + | | diff --git a/f3a b/f3e + | | rename from f3a + | | rename to f3e + | | diff --git a/f4a b/f4e + | | rename from f4a + | | rename to f4e + | | diff --git a/f5a b/f5b + | | rename from f5a + | | rename to f5b + | | + | | o changeset: 5:560daee679da + | | | user: test + | | | date: Thu Jan 01 00:00:00 1970 +0000 + | | | files: f3d f4a + | | | description: + | | | D1 + | | | + | | | + | | | diff --git a/f3d b/f3d + | | | new file mode 100644 + | | | --- /dev/null + | | | +++ b/f3d + | | | @@ -0,0 +1,1 @@ + | | | +c3a + | | | diff --git a/f4a b/f4a + | | | --- a/f4a + | | | +++ b/f4a + | | | @@ -1,1 +1,1 @@ + | | | -c4a + | | | +c4d + | | | + | | o changeset: 4:c9763722f9bd + | |/ parent: 0:11f7a1b56675 + | | user: test + | | date: Thu Jan 01 00:00:00 1970 +0000 + | | files: f1a f2a f2c f5a + | | copies: f2c (f2a) + | | description: + | | C1 + | | + | | + | | diff --git a/f1a b/f1a + | | --- a/f1a + | | +++ b/f1a + | | @@ -1,1 +1,1 @@ + | | -c1a + | | +c1c + | | diff --git a/f2a b/f2c + | | rename from f2a + | | rename to f2c + | | diff --git a/f5a b/f5a + | | --- a/f5a + | | +++ b/f5a + | | @@ -1,1 +1,1 @@ + | | -c5a + | | +c5c + | | + +---o changeset: 3:b69f5839d2d9 + | | user: test + | | date: Thu Jan 01 00:00:00 1970 +0000 + | | files: f3b f3d f4a + | | copies: f3d (f3b) + | | description: + | | D0 + | | + | | + | | diff --git a/f3b b/f3d + | | rename from f3b + | | rename to f3d + | | diff --git a/f4a b/f4a + | | --- a/f4a + | | +++ b/f4a + | | @@ -1,1 +1,1 @@ + | | -c4a + | | +c4d + | | + o | changeset: 2:f58c7e2b28fa + | | user: test + | | date: Thu Jan 01 00:00:00 1970 +0000 + | | files: f1b f2a f2c f5a f5b + | | copies: f2c (f2a) f5a (f5b) + | | description: + | | C0 + | | + | | + | | diff --git a/f1b b/f1b + | | --- a/f1b + | | +++ b/f1b + | | @@ -1,1 +1,1 @@ + | | -c1a + | | +c1c + | | diff --git a/f2a b/f2c + | | rename from f2a + | | rename to f2c + | | diff --git a/f5b b/f5a + | | rename from f5b + | | rename to f5a + | | --- a/f5b + | | +++ b/f5a + | | @@ -1,1 +1,1 @@ + | | -c5a + | | +c5c + | | + o | changeset: 1:3d7bba921b5d + |/ user: test + | date: Thu Jan 01 00:00:00 1970 +0000 + | files: f1a f1b f3a f3b f5a f5b + | copies: f1b (f1a) f3b (f3a) f5b (f5a) + | description: + | B0 + | + | + | diff --git a/f1a b/f1b + | rename from f1a + | rename to f1b + | diff --git a/f3a b/f3b + | rename from f3a + | rename to f3b + | diff --git a/f5a b/f5b + | rename from f5a + | rename to f5b + | + o changeset: 0:11f7a1b56675 + user: test + date: Thu Jan 01 00:00:00 1970 +0000 + files: f1a f2a f3a f4a f5a + description: + A0 + + + diff --git a/f1a b/f1a + new file mode 100644 + --- /dev/null + +++ b/f1a + @@ -0,0 +1,1 @@ + +c1a + diff --git a/f2a b/f2a + new file mode 100644 + --- /dev/null + +++ b/f2a + @@ -0,0 +1,1 @@ + +c2a + diff --git a/f3a b/f3a + new file mode 100644 + --- /dev/null + +++ b/f3a + @@ -0,0 +1,1 @@ + +c3a + diff --git a/f4a b/f4a + new file mode 100644 + --- /dev/null + +++ b/f4a + @@ -0,0 +1,1 @@ + +c4a + diff --git a/f5a b/f5a + new file mode 100644 + --- /dev/null + +++ b/f5a + @@ -0,0 +1,1 @@ + +c5a + +Check superfluous filemerge of files renamed in the past but untouched by graft + + $ echo a > a + $ hg ci -qAma + $ hg mv a b + $ echo b > b + $ hg ci -qAmb + $ echo c > c + $ hg ci -qAmc + $ hg up -q .~2 + $ hg graft tip -qt:fail + + $ cd .. + +Graft a change into a new file previously grafted into a renamed directory + + $ hg init dirmovenewfile + $ cd dirmovenewfile + $ mkdir a + $ echo a > a/a + $ hg ci -qAma + $ echo x > a/x + $ hg ci -qAmx + $ hg up -q 0 + $ hg mv -q a b + $ hg ci -qAmb + $ hg graft -q 1 # a/x grafted as b/x, but no copy information recorded + $ hg up -q 1 + $ echo y > a/x + $ hg ci -qAmy + $ hg up -q 3 + $ hg graft -q 4 + $ hg status --change . + M b/x + +Prepare for test of skipped changesets and how merges can influence it: + + $ hg merge -q -r 1 --tool :local + $ hg ci -m m + $ echo xx >> b/x + $ hg ci -m xx + + $ hg log -G -T '{rev} {desc|firstline}' + @ 7 xx + | + o 6 m + |\ + | o 5 y + | | + +---o 4 y + | | + | o 3 x + | | + | o 2 b + | | + o | 1 x + |/ + o 0 a + +Grafting of plain changes correctly detects that 3 and 5 should be skipped: + + $ hg up -qCr 4 + $ hg graft --tool :local -r 2::5 + skipping already grafted revision 3:ca093ca2f1d9 (was grafted from 1:13ec5badbf2a) + skipping already grafted revision 5:43e9eb70dab0 (was grafted from 4:6c9a1289e5f1) + grafting 2:42127f193bcd "b" + +Extending the graft range to include a (skipped) merge of 3 will not prevent us from +also detecting that both 3 and 5 should be skipped: + + $ hg up -qCr 4 + $ hg graft --tool :local -r 2::7 + skipping ungraftable merge revision 6 + skipping already grafted revision 3:ca093ca2f1d9 (was grafted from 1:13ec5badbf2a) + skipping already grafted revision 5:43e9eb70dab0 (was grafted from 4:6c9a1289e5f1) + grafting 2:42127f193bcd "b" + grafting 7:d3c3f2b38ecc "xx" + note: graft of 7:d3c3f2b38ecc created no changes to commit + + $ cd .. + +Grafted revision should be warned and skipped only once. (issue6024) + + $ mkdir issue6024 + $ cd issue6024 + + $ hg init base + $ cd base + $ touch x + $ hg commit -qAminit + $ echo a > x + $ hg commit -mchange + $ hg update -q 0 + $ hg graft -r 1 + grafting 1:a0b923c546aa "change" (tip) + $ cd .. + + $ hg clone -qr 2 base clone + $ cd clone + $ hg pull -q + $ hg merge -q 2 + $ hg commit -mmerge + $ hg update -q 0 + $ hg graft -r 1 + grafting 1:04fc6d444368 "change" + $ hg update -q 3 + $ hg log -G -T '{rev}:{node|shortest} <- {extras.source|shortest}\n' + o 4:4e16 <- a0b9 + | + | @ 3:f0ac <- + | |\ + +---o 2:a0b9 <- + | | + | o 1:04fc <- a0b9 + |/ + o 0:7848 <- + + + the source of rev 4 is an ancestor of the working parent, and was also + grafted as rev 1. it should be stripped from the target revisions only once. + + $ hg graft -r 4 + skipping already grafted revision 4:4e16bab40c9c (1:04fc6d444368 also has origin 2:a0b923c546aa) + [255] + + $ cd ../..