git-log: make sure we have some commit to start from.
When no usable head/tag is specified, git log barfed with underlying error message from rev-list, which was not helpful. Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
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#!/bin/sh
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. git-sh-setup-script || die "Not a git archive"
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revs=$(git-rev-parse --revs-only --default HEAD "$@")
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[ "$revs" ] || die "No HEAD ref"
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git-rev-list --pretty $(git-rev-parse --default HEAD "$@") | LESS=-S ${PAGER:-less}
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