Fixed bug #42725: csh with \n in variables

doc/release_new_version

@@ -220,13 +220,15 @@ Subject: GNU Parallel 20140722 ('Eyal Gilad Naftali') released
 
 GNU Parallel 20140722 ('Eyal Gilad Naftali') has been released. It is available for download at: http://ftp.gnu.org/gnu/parallel/
 
-This release contains a major change in central parts of the code and should be considered alpha quality. As always it passes the testsuite, so most functionality clearly works.
+This release contains a major change in central parts of the code and should be considered beta quality. As always it passes the testsuite, so most functionality clearly works.
+
+Thanks to Malcolm Cook for the brilliant idea to use a general perl expression as a replacement string.
 
 Haiku of the month:
 
-  Programs very slow.
-  Multiple can run at once.
-  Use GNU Parallel.
+  Are you tired of
+  inflexible replacements?
+  Use Perl expressions.
          -- Ole Tange
 
 New in this release:

src/parallel

@@ -1006,6 +1006,7 @@ sub parse_env_var {
     # Parse --env and set $Global::envvar
     # Returns: N/A
     $Global::envvar = "";
+    $Global::envwarn = "";
     my @vars = ();
     for my $varstring (@opt::env) {
         # Split up --env VAR1,VAR2
@@ -1039,10 +1040,16 @@ sub parse_env_var {
     }
     push @qbash, map { my $a=$_; "eval $a\"\$$a\"" } @bash_functions;
 
+    # Check if any variables contain \n
+    if(grep /\n/, @ENV{@vars}) {
+	# \n is bad for csh and will cause it to fail.
+	$Global::envwarn .= ::shell_quote_scalar(q{echo $SHELL | egrep "/t?csh" > /dev/null && echo CSH/TCSH DO NOT SUPPORT newlines IN VARIABLES/FUNCTIONS && exec false;}."\n");
+    }
+
     # Create lines like:
     # echo $SHELL | grep "/t\\{0,1\\}csh" >/dev/null && setenv V1 val1 && setenv V2 val2 || export V1=val1 && export V2=val2 ; echo "$V1$V2"
     if(@vars) {
-	$Global::envvar = 
+	$Global::envvar .= 
 	    join"", 
 	    (q{echo $SHELL | grep "/t\\{0,1\\}csh" > /dev/null && }
 	     . join(" && ", @qcsh)
@@ -1787,7 +1794,8 @@ sub progress {
 		my $rev = '';
 		my $reset = '';
 		my $terminal_width = terminal_columns();
-		my $s = sprintf("%-${terminal_width}s",$bar_text);
+		my $s = sprintf("%-${terminal_width}s",
+				substr($bar_text,0,$terminal_width));
 		my $width = int($terminal_width * $pctcomplete);
 		$s =~ s/^(.{$width})/$1$reset/;
 		$s = "\r#   ".int($this_eta)." sec $arg" . "\r". $pctcomplete*100 # Prefix with zenity header
@@ -4880,7 +4888,8 @@ sub sshlogin_wrap {
 	    # We cannot use parse_env_var(), as PARALLEL_SEQ changes
 	    # for each command
 	    my $parallel_env =
-		(q{ 'eval `echo $SHELL | grep "/t\\{0,1\\}csh" > /dev/null }
+		($Global::envwarn
+		 . q{ 'eval `echo $SHELL | grep "/t\\{0,1\\}csh" > /dev/null }
 		 . q{ && echo setenv PARALLEL_SEQ '$PARALLEL_SEQ'\; }
 		 . q{ setenv PARALLEL_PID '$PARALLEL_PID' }
 		 . q{ || echo PARALLEL_SEQ='$PARALLEL_SEQ'\;export PARALLEL_SEQ\; }

src/parallel.pod

@@ -1338,6 +1338,15 @@ used as a positional replacement string (like B<{2.}>).
 It is recommended to only change $_ but you have full access to all
 of GNU B<parallel>'s internal functions and data structures.
 
+Here are a few examples:
+
+  Remove 2 extensions (e.g. .tar.gz)
+  --rpl '{..} s:\.[^/.]+$::;s:\.[^/.]+$::;'
+  Keep only the extension
+  --rpl '{ext} s:.*\.::'
+  Is the job sequence even or odd?
+  --rpl '{odd} $_=$job->seq()%2?"odd":"even"'
+
 See also: B<{= perl expression =}> B<--parens>
 
 

src/parallel.texi

@@ -1494,6 +1494,17 @@ used as a positional replacement string (like @strong{@{2.@}}).
 It is recommended to only change $_ but you have full access to all
 of GNU @strong{parallel}'s internal functions and data structures.
 
+Here are a few examples:
+
+@verbatim
+  Remove 2 extensions (e.g. .tar.gz)
+  --rpl '{..} s:\.[^/.]+$::;s:\.[^/.]+$::;'
+  Keep only the extension
+  --rpl '{ext} s:.*\.::'
+  Is the job sequence even or odd?
+  --rpl '{odd} $_=$job->seq()%2?"odd":"even"'
+@end verbatim
+
 See also: @strong{@{= perl expression =@}} @strong{--parens}
 
 @item @strong{--max-chars}=@emph{max-chars}
@@ -2653,7 +2664,8 @@ these chunks. To parallelize both reading of bigfile and regexp.txt
 combine the two using --fifo:
 
 @verbatim
-    parallel --pipepart --block 100M -a bigfile --fifo cat regexp.txt \| parallel --pipe -L1000 --round-robin grep -f - {}
+    parallel --pipepart --block 100M -a bigfile --fifo cat regexp.txt \
+    \| parallel --pipe -L1000 --round-robin grep -f - {}
 @end verbatim
 
 @node EXAMPLE: Using remote computers

testsuite/Makefile

@@ -58,7 +58,7 @@ installparallel: ../src/parallel
 
 startdb:
 	#echo shutdown abort | sudo su - oracle -c "sqlplus / as sysdba"
-	sudo parallel /etc/init.d/{} restart ::: postgresql mysql oracle-xe
+	sudo parallel /etc/init.d/{} restart ::: postgresql mysql # oracle-xe
 	VBoxManage startvm OracleXE || true
 
 clean:

testsuite/tests-to-run/parallel-local-ssh2.sh

@@ -10,4 +10,13 @@ echo '### --wd no-such-dir - tcsh'
   stdout parallel --wd /no-such-dir -S tcsh@localhost echo ::: "ERROR IF PRINTED"; echo Exit code $?
 echo '### --wd no-such-dir - bash'
   stdout parallel --wd /no-such-dir -S parallel@localhost echo ::: "ERROR IF PRINTED"; echo Exit code $?
+
+echo '### bug #42725: csh with \n in variables'
+  not_csh() { echo This is not csh/tcsh; }; 
+  export -f not_csh; 
+  parallel --env not_csh -S csh@lo not_csh ::: 1; 
+  parallel --env not_csh -S tcsh@lo not_csh ::: 1; 
+  parallel --env not_csh -S parallel@lo not_csh ::: 1; 
+
+
 EOF

testsuite/tests-to-run/parallel-local8.sh

@@ -14,8 +14,8 @@ done
 
 echo "### Test if --load blocks. Bug.";
   seq 1 1000 | parallel -kj2 --load 300% --recend "\n" --spreadstdin gzip -1 | zcat | sort -n | md5sum
-  seq 1 1000 | parallel -kj0 --load 300% --recend "\n" --spreadstdin gzip -1 | zcat | sort -n | md5sum
+  seq 1 1000 | parallel -kj240 --load 300% --recend "\n" --spreadstdin gzip -1 | zcat | sort -n | md5sum
 
 echo "### Test reading load from PARALLEL"
-  seq 1 1000000 | parallel -kj0 --recend "\n" --spreadstdin gzip -1 | zcat | sort -n | md5sum
+  seq 1 1000000 | parallel -kj240 --recend "\n" --spreadstdin gzip -1 | zcat | sort -n | md5sum
   seq 1 1000000 | parallel -kj20 --recend "\n" --spreadstdin gzip -1 | zcat | sort -n | md5sum

testsuite/wanted-results/parallel-local-ssh2

@@ -20,3 +20,9 @@ echo '### --wd no-such-dir - bash'
 mkdir: cannot create directory ‘/no-such-dir’: Permission denied
 bash: line 0: cd: /no-such-dir: No such file or directory
 Exit code 1
+echo '### bug #42725: csh with \n in variables'
+### bug #42725: csh with \n in variables
+  not_csh() { echo This is not csh/tcsh; };   export -f not_csh;   parallel --env not_csh -S csh@lo not_csh ::: 1;   parallel --env not_csh -S tcsh@lo not_csh ::: 1;   parallel --env not_csh -S parallel@lo not_csh ::: 1; 
+CSH/TCSH DO NOT SUPPORT newlines IN VARIABLES/FUNCTIONS
+CSH/TCSH DO NOT SUPPORT newlines IN VARIABLES/FUNCTIONS
+This is not csh/tcsh