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Setup:
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$ cat > eval.py <<EOF
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> from __future__ import absolute_import
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> import filecmp
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> from mercurial import commands, context, pycompat, registrar
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> cmdtable = {}
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> command = registrar.command(cmdtable)
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> @command(b'eval', [], b'hg eval CMD')
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> def eval_(ui, repo, *cmds, **opts):
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> cmd = b" ".join(cmds)
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> res = pycompat.bytestr(eval(cmd, globals(), locals()))
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> ui.warn(b"%s" % res)
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> EOF
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$ echo "[extensions]" >> $HGRCPATH
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$ echo "eval=`pwd`/eval.py" >> $HGRCPATH
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Arbitraryfilectx.cmp does not follow symlinks:
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$ mkdir case1
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$ cd case1
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$ hg init
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#if symlink
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$ printf "A" > real_A
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$ printf "foo" > A
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$ printf "foo" > B
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$ ln -s A sym_A
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$ hg add .
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adding A
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adding B
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adding real_A
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adding sym_A
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$ hg commit -m "base"
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#else
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$ hg import -q --bypass - <<EOF
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> # HG changeset patch
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> # User test
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> # Date 0 0
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> base
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>
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> diff --git a/A b/A
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> new file mode 100644
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> --- /dev/null
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> +++ b/A
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> @@ -0,0 +1,1 @@
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> +foo
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> \ No newline at end of file
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> diff --git a/B b/B
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> new file mode 100644
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> --- /dev/null
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> +++ b/B
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> @@ -0,0 +1,1 @@
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> +foo
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> \ No newline at end of file
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> diff --git a/real_A b/real_A
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> new file mode 100644
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> --- /dev/null
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> +++ b/real_A
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> @@ -0,0 +1,1 @@
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> +A
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> \ No newline at end of file
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> diff --git a/sym_A b/sym_A
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> new file mode 120000
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> --- /dev/null
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> +++ b/sym_A
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> @@ -0,0 +1,1 @@
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> +A
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> \ No newline at end of file
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> EOF
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$ hg up -q
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#endif
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These files are different and should return True (different):
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(Note that filecmp.cmp's return semantics are inverted from ours, so we invert
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for simplicity):
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$ hg eval "context.arbitraryfilectx('A', repo).cmp(repo[None]['real_A'])"
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True (no-eol)
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$ hg eval "not filecmp.cmp('A', 'real_A')"
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True (no-eol)
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These files are identical and should return False (same):
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$ hg eval "context.arbitraryfilectx('A', repo).cmp(repo[None]['A'])"
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False (no-eol)
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$ hg eval "context.arbitraryfilectx('A', repo).cmp(repo[None]['B'])"
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False (no-eol)
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$ hg eval "not filecmp.cmp('A', 'B')"
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False (no-eol)
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|
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|
This comparison should also return False, since A and sym_A are substantially
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the same in the eyes of ``filectx.cmp``, which looks at data only.
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$ hg eval "context.arbitraryfilectx('real_A', repo).cmp(repo[None]['sym_A'])"
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False (no-eol)
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|
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A naive use of filecmp on those two would wrongly return True, since it follows
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the symlink to "A", which has different contents.
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#if symlink
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$ hg eval "not filecmp.cmp('real_A', 'sym_A')"
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True (no-eol)
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#else
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$ hg eval "not filecmp.cmp('real_A', 'sym_A')"
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False (no-eol)
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#endif
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