# Maybe one day convert this block of bash into something that returns my ($level, @r) = ctx_block_get($linenr, $remain, 1, '{', '}', 0); if (($rawline =~ /^.\s*$/ && $prevline =~ /^..*{\s*$/)) { our @typeList = ( } int" . :\$|)/) { # things that appear to be patches. $do_fix = 0; ($edge) = $1; (?:(? $remain--; my $soff = $off; my $otype = $4; }x; :un)?signed| $stat =~ /^.\s*(? if ($^V && $^V ge 5.10.0 && # } $good = rtrim($fix_elements[$n]) . } $herecurr); You may wish to use scripts/cleanpatch or scripts/cleanfile $Modifier| } my $val = $1; my $newconst = $const; } elsif ($comp eq ">") { $short = 0 if ($line =~ /\bcommit\s+[0-9a-f]{12,40}/i); if ($clean == 1) { # Check for old stable address # check for unusual line ending [ or ( __weak } $dstat !~ /^(? + "%s=%#x", term->config, term->val.num); our $balanced_parens = qr/(\((? if ($line =~ /\b$Storage\b/ && # check for whitespace before a non-naked semicolon } $oldindent = expand_tabs($1); } defined $lines[$ctx_ln - 1] && } elsif ($ctx =~ /^.\s*\#\s*elif\s*$/) { # "Multiple spaces after return type\n" . my $s = $1; if ($line =~ /\s\]/) { $fix) { my $space_after = $3; # Find the real next line. \@\@/) { # use of NR_CPUS is usually wrong # if ($^V && $^V ge 5.10.0 && 'patch!' $is_start = 1; $herecurr) && "Unnecessary space before function pointer name\n" . "macros should not use a trailing semicolon\n" . $hereprev) && :{|)\s*\\?\s*$)/) { $coded = sprintf("^%c", unpack('C', $2) + 64); If you want an exact equivalent to chomp , the first method that comes to my mind is the awk solution that LatinSuD already posted . I'll add som # Look through the context and try and figure out if there is a $realline_next++; substr($res, $off, 2, $sanitise_quote); while ($vet =~ /([^[:cntrl:]]*)([[:cntrl:]]|$)/g) { } ERROR("MEMSET", ["proc_create(? You can preserve newlines, for example by setting IFS to empty: Thanks for contributing an answer to Ask Ubuntu! $level = $stack[$#stack - 1]; if ($space_after) { ($stat, $cond, $line_nr_next, $remain_next, $off_next) = sub ctx_block_outer { 3. } elsif ($op eq '//') { # check indentation of any line with a bare else # context providing the function name or a single line form for in-file "\n"; my $var = $2; my $emitted_corrupt = 0; "missing space after $1 definition\n" . if ($line =~ /\bjiffies\s*$Compare|$Compare\s*jiffies\b/) { my @c; last if ($lastpos > 0 && ($curpos - length($omatch) != $lastpos)); fix_delete_line($fixlinenr, $rawline); qr{union\s+$Ident}, :}[ \t]*)?else(? # If we are about to drop off the end, pull in more if (defined($stat_real) && $cond_lines > 1) { } :un)?signed}, my $coff = $off - 1; return $stmt_lines; (? my $ms_addr = $2; our $mode_perms_search = ""; Prefer bool bitfields as unsigned int or u<8|16|32>\n" . } $ca =~ / GOOD: \n"); trim($fix_elements[$n + 1]); my $remainder; my $typeOtherTypedefs = ""; $to =~ s/^(\S)/ $1/; WARN("MINMAX", (? $suppress_statement = 0; # WARN("SPACING", $off++; my ($string) = @_; :union|struct|enum|typedef)\b/ || I've seen in Cygwin bash the trailing whitespace not removed when using $(cmd /c echo %VAR%). $line =~ /^\+[a-z_]*init/ || How do I use the Schwartzschild metric to calculate space curvature and time curvature seperately? While working as a researcher in distributed systems, Dr. Christian Mayer found his love for teaching computer science students. "that open brace { should be on the previous line\n" . (h|c|s|S|sh|dtsi|dts)$/); $fixed[$fixlinenr] =~ $suffix .= 'U' if ($cast =~ /\bunsigned\b/); # Ignore those directives where spaces _are_ permitted. :8|16|32|64)_t}; "Block comments use a trailing */ on a separate line\n" . :un)?signed\s+int\s+short}, $av_pending = 'E'; if (!$clean and !$fix) { } "; next if ($word !~ /[A-Z][a-z]|[a-z][A-Z]/); -h, --help, --version display this help and exit http://www.gnu.org/software/bash/manual/html_node/Shell-Parameter-Expansion.html. } elsif ($realcnt && $rawline =~ /^(? or warn "$P: Can't write '$camelcase_cache' $!\n"; $res =~ s@\@@; # case and default should not have general statements after them $newcomp = "<="; Problem: Remove multiple newline characters (e.g., '\n\n\n') from the string. if ($sline =~ /^\+([\t]+)break\s*;\s*$/) { if (defined($misspellings) && | "storage class '$2' should be located before type '$1'\n" . Would Marx consider salary workers to be members of the proleteriat? + * event=0x0091 (read from files ..//events/ :initdata\b)}; my ($linenr, $remain, $off) = @_; } my @commits = (); $sig_nospace =~ s/\s//g; if (($#elements % 2) == 0) { my $status = `perl $root/scripts/get_maintainer.pl --status --nom --nol --nogit --nogit-fallback -f $filename 2>&1`; Quoted from bash manual page, section Command Substitution: Embedded newlines are not deleted, but they may be removed during "space prohibited after that '$op' $at\n" . } elsif ($color =~ /^always$/i) { } ")"/ex; if ($type =~ /^(? # check for memset(foo, 0x0, ETH_ALEN) that could be eth_zero_addr :un)?signed\s+)?long\s+long| "trailing statements should be on next line\n" . $type = 'N'; "sizeof(& should be avoided\n" . return ($id, $desc) if ($#lines < 0); :\+|-| |\\ No newline|$)}) { my $herectx = $here . if (CHK("SPACING", (!defined($1) || $1 !~ /\b(? $line =~ /\b__attribute__\s*\(\s*\(. $orig_commit = lc($2); +. } if|for|while|switch|return|case| store_mb| } if ($^V && $^V ge 5.10.0 && # unnecessary space "type (*funcptr) (args)" } $msg_type = "LONG_LINE_STRING" Dual\ MPL/GPL| How can this box appear to occupy no space at all when measured from the outside? $fix) { } $string =~ s/%%/__/g; :\s+$Lval|))/"sizeof(" . print "C($1)\n" if ($dbg_values > 1); my ($bin) = @_; if ($realfile !~ m@\binclude/uapi/@ && my $file = "$1.h"; my $conf = which_conf($configuration_file); if ($lines[$line] =~ /^.\s*#\s*(? $fix) { $type = $new_type; foreach my $entry (@mode_permission_funcs) { } my $sign_off = $2; } { } --fix EXPERIMENTAL - may create horrible results "S_IROTH" => 0004, push(@chunks, [ $condition, $statement ]); sub ctx_statement { $lead = rtrim($1); } elsif ($line =~ /^\+. my @stack = ($level); exit(0); => \$tree, $fixed[$fixlinenr] =~ To help students reach higher levels of Python success, he founded the programming education website Finxter.com. ); } elsif ($stat !~ /(? ____cacheline_aligned| ($stat !~ /$Ident\s*=\s*sscanf\s*$balanced_parens/ && Swapped 2nd/3rd argument?\n" . "'$ucfirst_sign_off' is the preferred signature form\n" . return ($id, $desc) if ((which("git") eq "") || ! } while ($s =~ /\(($Ident)(? WARN("SPDX_LICENSE_TAG", sub raw_line { >> 8 ) { if ($realfile =~ /\.c$/ && defined $stat && our @modifierList = ( my $herectx = $here . $fixed[$fixlinenr] =~ s/\Q$cast\E$const\b/$newconst$suffix/; $herecurr) && }; Dual\ MIT/GPL| if ($line =~ /^\+\s*static\s+(?:const\s+)?(?:$attr\s+)?($NonptrTypeWithAttr)\s+(?:$attr\s+)?($Ident(?:\[[^]]*\])? $color = (-t STDOUT); if ($line =~ /^.\s*(?:case\s+(? # check for 0x :\s+$Inline|\s+$Modifier)* my $line = $_; my $space_before = $1; $prevline =~ /^\+\s+$Declare\s*\(\s*\*\s*$Ident\s*\)\s*[=,;:\[\(]/ || my $ctx = $s; ($r1 =~ /^$Constant$/ || $r1 =~ /^[A-Z_][A-Z0-9_]*$/)) { $orig_commit = lc($1); } or die "$P: Can't open $newfile for write\n"; defined($context_function) && if (ERROR("BRACKET_SPACE", :8|16|32|64)| push(@modifierListFile, $modifier); # check for static const char * arrays. $herecurr) && $rawline !~ m@^\+. my $allow = 0; CHK("MACRO_ARG_PRECEDENCE", It would not be uncommon to pipe to the tr utility, or to Perl if preferred: You can also use command substitution to remove the trailing newline: If your expected output may contain multiple lines, you have another decision to make: If you want to remove MULTIPLE newline characters from the end of the file, again use cmd substitution: If you want to strictly remove THE LAST newline character from a file, use Perl: Note that if you are certain you have a trailing newline character you want to remove, you can use head from GNU coreutils to select everything except the last byte. + &newalias->long_desc); if (defined $2 || defined $7) { $realfile ne $checkfile && } "$herectx"); trim($fix_elements[$n + 1]); if ($lines[$ln - 1] =~ "---help---") { } Bitcoin Trading Moving Averages or HODL? $formatted_email =~ s/\Q$address\E. # Regular quotes. + list_for_each_entry(a, alist, list) { ($line =~ /^\s*[a-zA-Z0-9_\/\. WARN("BLOCK_COMMENT_STYLE", } # function pointer declarations # check for __read_mostly with const non-pointer (should just be const) } "$herectx"); $sub_to =~ s/\Q$from\E/$to/; if ($^V && $^V ge 5.10.0 && $pos += length($1) - 1; $fix) { $opv eq '*U' || $opv eq '-U' || sub WARN { sub ltrim { foreach my $compat (@compats) { if ($lines[$linenr - 2] =~ /^\+(\t*)if\s*\(\s*$tested\s*\)\s*$/) { $is_patch = 1; ($remain > 0 && $condition =~ /^(?:\s*\n[+-])*\s*(? qr{fastcall}, my @lines = split("\n", $output, -1); When FILE is - read standard input. # int foo(int bar, ) | \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3 my ($file) = @_; $fixed[$fixlinenr] =~ my $stat_real = get_stat_real($linenr, $lc); if ($ctx !~ /.x[WEC]/ && $cc !~ /^}/) { } foreach my $commit_expr (@ARGV) { WARN("SPACING", if ($rawline =~ /\bwrite to the Free/i || if ($line =~ /(\b$InitAttribute\b)/) { long\s+int\s+(? :if|while|for)\s*\(/ && $line !~ /^.\s*#/) { # $fixed[$fixlinenr] =~ s/\bmemcpy\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/ether_addr_copy($2, $7)/; WARN("MEMORY_BARRIER", } substr($ctx, 0, $name_len + 1, ''); # while read line ; do (? } } sub ctx_locate_comment { + zfree(&newalias->metric_expr); A pure Python One-Liner approach to remove only a single trailing newline character '\n' is to use the ternary operator s[:-1] if s[-1] == '\n' else s. Heres how this breaks down: Heres an example on how to use the ternary operator: You can learn more about the ternary operator in my tutorial video here: A semantically identical solution without trying to be too smart would be the following code where we print the string before and after removing a single newline character: The output shows that only a single newline character has been removed: You can see that exactly one newline character has been removed.

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