Avoid extra filelogs entries. Right now, there are some situations in which localrepo.filecommit can create filelog entries even though they're not needed. For example: - permissions for a file have changed; - qrefresh can create a filelog entry identical to its parent (see the added test); - convert-repo creates extra filelog entries in every merge where the first parent has added files (for example, changeset ebebe9577a1a of the kernel repo added extra filelog entries to files in the arch/blackfin directory, even though the merge should only touch the drivers/ata directory). This makes "hg log file" in a converted repo less useful than it could be, since it may mention many merges that don't actually touch that specific file. They all come from the same basic problem: localrepo.commit (through filecommit) creates new filelog entries for all files passed to it (except for some cases during a merge). Patch and test case provided by Benoit. This should fix issue351.

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#!/bin/sh

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hg init

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touch a

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hg add a

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hg commit -m "Added a" -d "1000000 0"

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touch main

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hg add main

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hg commit -m "Added main" -d "1000000 0"

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hg checkout 0

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echo Main should be gone

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ls

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touch side1

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hg add side1

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hg commit -m "Added side1" -d "1000000 0"

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touch side2

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hg add side2

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hg commit -m "Added side2" -d "1000000 0"

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hg log

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echo Should have two heads, side2 and main

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hg heads

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echo Should show "a side1 side2"

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ls

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hg update --debug -C 1

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echo Should only show "a main"

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ls

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