| pulkit |
| hg-reviewers |
They are a logic and it is easy to explain, so lets explain it.
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| Path | Packages | |||
|---|---|---|---|---|
| M | tests/test-copies-chain-merge.t (32 lines) |
| Commit | Parents | Author | Summary | Date |
|---|---|---|---|---|
| d88bd2596dd9 | f1d08c93b5da | Pierre-Yves David | Dec 13 2020, 1:18 PM |
| Merge: | Merge: | ||||
| - one with change to a file (d) | - one with change to a file (d) | ||||
| - one overwriting that file with a rename (from h to i, to d) | - one overwriting that file with a rename (from h to i, to d) | ||||
| This case is similar to BF/FB, but an actual merge happens, so both side of the | This case is similar to BF/FB, but an actual merge happens, so both side of the | ||||
| history are relevant. | history are relevant. | ||||
| Note: | |||||
| | In this case, the merge get conflicting information since on one side we have | |||||
| | "a -> c -> d". and one the other one we have "h -> i -> d". | |||||
| | | |||||
| | The current code arbitrarily pick one side | |||||
| $ hg log -G --rev '::(desc("mGFm")+desc("mFGm"))' | $ hg log -G --rev '::(desc("mGFm")+desc("mFGm"))' | ||||
| o 29 mGFm-0 simple merge - the other way | o 29 mGFm-0 simple merge - the other way | ||||
| |\ | |\ | ||||
| +---o 28 mFGm-0 simple merge - one way | +---o 28 mFGm-0 simple merge - one way | ||||
| | |/ | | |/ | ||||
| | o 25 g-1: update d | | o 25 g-1: update d | ||||
| | | | | | | ||||
| o | 22 f-2: rename i -> d | o | 22 f-2: rename i -> d | ||||
| | | | | | | ||||
| o | 21 f-1: rename h -> i | o | 21 f-1: rename h -> i | ||||
| |/ | |/ | ||||
| o 2 i-2: c -move-> d | o 2 i-2: c -move-> d | ||||
| | | | | ||||
| o 1 i-1: a -move-> c | o 1 i-1: a -move-> c | ||||
| | | | | ||||
| o 0 i-0 initial commit: a b h | o 0 i-0 initial commit: a b h | ||||
| Note: | |||||
| | In this case, the merge get conflicting information since on one side we have | |||||
| | "a -> c -> d". and one the other one we have "h -> i -> d". | |||||
| | | |||||
| | The current code arbitrarily pick one side depending the ordering of the merged hash: | |||||
| In this case, the file hash from "f-2" is lower, so it will be `p1` of the resulting filenode its copy tracing information will win (and trace back to "h"): | |||||
| Details on this hash ordering pick: | |||||
| $ hg manifest --debug 'desc("g-1")' | egrep 'd$' | |||||
| f2b277c39e0d2bbac99d8aae075c0d8b5304d266 644 d (no-changeset !) | |||||
| 4ff57b4e8dceedb487e70e6965ea188a7c042cca 644 d (changeset !) | |||||
| $ hg status --copies --rev 'desc("i-0")' --rev 'desc("g-1")' d | |||||
| A d | |||||
| a (no-changeset no-compatibility !) | |||||
| $ hg manifest --debug 'desc("f-2")' | egrep 'd$' | |||||
| 4a067cf8965d1bfff130057ade26b44f580231be 644 d (no-changeset !) | |||||
| fe6f8b4f507fe3eb524c527192a84920a4288dac 644 d (changeset !) | |||||
| $ hg status --copies --rev 'desc("i-0")' --rev 'desc("f-2")' d | |||||
| A d | |||||
| h (no-changeset no-compatibility !) | |||||
| Copy tracing data on the resulting merge: | |||||
| $ hg status --copies --rev 'desc("i-0")' --rev 'desc("mFGm-0")' | $ hg status --copies --rev 'desc("i-0")' --rev 'desc("mFGm-0")' | ||||
| A d | A d | ||||
| h | h | ||||
| R a | R a | ||||
| R h | R h | ||||
| $ hg status --copies --rev 'desc("i-0")' --rev 'desc("mGFm-0")' | $ hg status --copies --rev 'desc("i-0")' --rev 'desc("mGFm-0")' | ||||
| A d | A d | ||||
| a (no-filelog !) | a (no-filelog !) | ||||