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Currently when p4 fails to run, git-p4 just crashes with an obscure error message. For example, if the P4 ticket has expired, you get: Error: Cannot locate perforce checkout of <path> in client view This change checks whether git-p4 can talk to the Perforce server when the first P4 operation is attempted, and tries to print a meaningful error message if it fails. Signed-off-by: Luke Diamand <luke@diamand.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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