Piping curl followed by an echo some times truncates the output when using tail
Given the following 2 lines in a bash script,
LOCATION=$(curl -i -H "Windmill-Name: $APPLICATION_NAME" -H "Windmill-Identifier: $CFBundleIdentifier" -F "ipa=@$IPA" -F "plist=@$PLIST" $WINDMILL_BASE_URL/windmill/rest/windmill/$USER | grep ^Location | awk '{print $2}')
echo "[windmill] Use $LOCATION for accessing '$APPLICATION_NAME'"
In some cases, the echo string appears like below.
for accessing 'MultiPartIOSDemo' [a truncated $LOCATION]
The behaviour is not consistent but when it reproduces, the malformed output is consistent (ie a truncated $LOCATION at some range).
It looks like echo outputs the string to the buffer but the piping of curl isn't yet done and ends up writing its output on top.
Can't quite tell.
Update
Tried all of your suggestions, but the same problem occurs.
Have now dropped grep and the script looks like so
LOCATION=$(curl -i -H "Windmill-Name: $APPLICATION_NAME" -H "Windmill-Identifier: $CFBundleIdentifier" -F "ipa=@$IPA" -F "plist=@$PLIST" "$WINDMILL_BASE_URL/windmill/rest/windmill/$USER" | awk -W '/^Location/ {print $2}')
echo "[windmill] Use $LOCATION for accessing '$APPLICATION_NAME'"
Here are some more details.
The script that includes the above lines is wrapped in a
(
(
# bash script
) 2>&1 | tee $HOME/.windmill/$PROJECT_NAME.log
) 2>&1 | tee $HOME/.windmill/windmill.log
Hence the output of the echo is on both logs.
Just noticed that the above behaviour occurs while tailing , eg
tail -fn 20 ~/.windmill/windmill.log
However if I do a
more ~/.windmill/windmill.log
I can see that the echo message appears correctly. Notice the newline character "^M". Wondering if it has anything to do with the way tail parses the log.
[windmill] Use [correct $LOCATION] ^M for accessing 'MultiPartIOSDemo'
Clarified Question
Guess after all the above, there are really 2 questions.
I would (1) change
$WINDMILL_BASE_URL/windmill/rest/windmill/$USER
to
"$WINDMILL_BASE_URL/windmill/rest/windmill/$USER"
(2) use tee to debug and (3) use awk to match "^location" instead of grep
LOCATION=$(curl -i -H "Windmill-Name: $APPLICATION_NAME" -H "Windmill-Identifier: $CFBundleIdentifier" -F "ipa=@$IPA" -F "plist=@$PLIST" "$WINDMILL_BASE_URL/windmill/rest/windmill/$USER" | tee /tmp/debug.$$ | awk ' /^Location/ {print $2}')
echo "[windmill] Use $LOCATION for accessing '$APPLICATION_NAME'"
Perhaps curl is returing an error. You can check the results and only parse it if no error occured
# Create a trace file
tfile=/tmp/trace.$$
# uncomment this line if you want to delete the trace file at the end of the script
#trap "/bin/rm $tfile" 0 1 15
curl -i -H "Windmill-Name: $APPLICATION_NAME" -H "Windmill-Identifier: $CFBundleIdentifier" -F "ipa=@$IPA" -F "plist=@$PLIST" "$WINDMILL_BASE_URL/windmill/rest/windmill/$USER" >$tfile
status=$?
if [ $status -eg 0 ]
then
echo curl was successful
LOCATION=$(awk '/^Location/ {print $2}' <$tfile)
echo "[windmill] Use $LOCATION for accessing '$APPLICATION_NAME'"
else
echo curl exited with status $status
fi
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