[PATCH v3 2/4] ci: show error message of "p4 -V"

[Jiang Xin <worldhello.net@gmail.com>]

From: Jiang Xin <zhiyou.jx@alibaba-inc.com>

When installing p4 as a dependency, we used to pipe output of "p4 -V" to
validate the installation, but this would hide potential errors of p4.
E.g.: A broken p4 installation fails to run.

Add some instructions to show errors of command "p4 -V", so we can see
why the command output doesn't match.

Reviewed-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Jiang Xin <zhiyou.jx@alibaba-inc.com>
---
 ci/install-dependencies.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ci/install-dependencies.sh b/ci/install-dependencies.sh
index f639263a62..291e49bdde 100755
--- a/ci/install-dependencies.sh
+++ b/ci/install-dependencies.sh
@@ -83,9 +83,9 @@ esac
 if type p4d >/dev/null 2>&1 && type p4 >/dev/null 2>&1
 then
 	echo "$(tput setaf 6)Perforce Server Version$(tput sgr0)"
-	p4d -V | grep Rev.
+	p4d -V | grep Rev. || { echo >&2 "p4d: bad version"; p4d -V; exit 1; }
 	echo "$(tput setaf 6)Perforce Client Version$(tput sgr0)"
-	p4 -V | grep Rev.
+	p4 -V | grep Rev. || { echo >&2 "p4: bad version"; p4 -V; exit 1; }
 else
 	echo >&2 "WARNING: perforce wasn't installed, see above for clues why"
 fi
-- 
2.39.0.rc0