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#!/usr/bin/perl -w
# ================================================================
# === ==> -------- HISTORY -------- <== ===
# ================================================================
#
# Version Date Maintainer Changes, Additions, Fixes
# 0.0.1 2017-03-12 sed, PrydeWorX First basic design
#
# ========================
# === Little TODO list ===
# ========================
#
use strict;
use warnings;
use Cwd qw(getcwd abs_path);
use File::Basename;
use File::Find;
use Readonly;
# ================================================================
# === ==> ------ Help Text and Version ----- <== ===
# ================================================================
Readonly my $VERSION => "0.0.1"; ## Please keep this current!
Readonly my $VERSMIN => "-" x length($VERSION);
Readonly my $PROGDIR => dirname($0);
Readonly my $PROGNAME => basename($0);
Readonly my $WORKDIR => getcwd();
Readonly my $USAGE_SHORT => "$PROGNAME <--help|path to po directory>";
Readonly my $USAGE_LONG => qq#
elogind po file cleaner V$VERSION
-------------------------$VERSMIN
Check all .po files in the given directory and comment out all lines
that refer to non-existent files.
Usage :
-------
$USAGE_SHORT
Options :
---------
-h|--help | Print this help text and exit.
#;
# ================================================================
# === ==> -------- Global variables -------- <== ===
# ================================================================
my $file_fmt = ""; ## Format string built from the longest file name in generate_file_list().
my $main_result = 1; ## Used for parse_args() only, as simple $result is local everywhere.
my $po_file_path = ""; ## Path to where the .po files are to be found.
my $show_help = 0;
my @source_files = (); ## File list generated by generate_file_list()
# ================================================================
# === ==> -------- Function list -------- <== ===
# ================================================================
sub generate_file_list; ## Find all relevant files and store them in @wanted_files
sub parse_args; ## Parse ARGV for the options we support
sub wanted; ## Callback function for File::Find
# ================================================================
# === ==> -------- Prechecks -------- <== ==
# ================================================================
$main_result = parse_args(@ARGV);
( (!$main_result) ## Note: Error or --help given, then exit.
or ( $show_help and print "$USAGE_LONG" ) )
and exit(!$main_result);
generate_file_list or exit 1;
# ================================================================
# === ==> -------- = MAIN PROGRAM = -------- <== ===
# ================================================================
for my $pofile (@source_files) {
printf("$file_fmt: ", $pofile);
# --- 1) Load the file ---
# ------------------------
my @lIn = ();
if (open(my $fIn, "<", $pofile)) {
@lIn = <$fIn>;
close($fIn);
} else {
print "ERROR READING: $!\n";
next;
}
# --- 2) Copy @lIn to @lOut, commenting out all parts ---
# --- belonging to files that do not exist. ---
# -------------------------------------------------------
my $count = 0;
my $in_block = 0; ## 1 if in commented out block
my @lOut = ();
my $was_block = 0; ## save in_block, so we know when to add elogind masks
for my $line (@lIn) {
chomp $line;
# in_block switches are done on file identifications lines, which look like
# this : "#: ../src/import/org.freedesktop.import1.policy.in.h:2"
if ($line =~ m/^#:\s+([^:]+):\d+/) {
# Note: There might be two file references, if the transalted text spans
# more than one line. The second path is the same as the first, so
# it is sufficient not to end the regex with '$' here.
my $altfile = substr($1, 0, -2); ## .in files have an extra '.h' attached
$was_block = $in_block;
$in_block = (-f $po_file_path . "/" . $1) || (-f $po_file_path . "/" . $altfile) ? 0 : 1;
$in_block and ++$count;
}
# If the in_block switches, add elogind mask start or end
if ($was_block != $in_block) {
$was_block
and push(@lOut, "#endif // 0\n")
or push(@lOut, "#if 0 /// UNNEEDED by elgoind");
$was_block = $in_block;
}
# If we are in block, comment out the line:
$in_block and $line = "# $line";
# Now push the line, it is ready.
push(@lOut, $line);
} ## End of line copying
# Make sure to end the last block
$in_block and push(@lOut, "#endif // 0\n");
# --- 3) Overwrite the input file with the adapted text. ---
# ----------------------------------------------------------
if (open(my $fOut, ">", $pofile)) {
for my $line (@lOut) {
print $fOut "$line\n";
}
close($fOut);
print "$count blocks masked\n";
} else {
print "ERROR WRITING: $!\n";
}
} ## End of main loop
# ===========================
# === END OF MAIN PROGRAM ===
# ===========================
# ================================================================
# === ==> ---- Function Implementations ---- <== ===
# ================================================================
# -----------------------------------------------------------------------
# --- Finds all relevant files and store them in @wanted_files ---
# --- Returns 1 on success, 0 otherwise. ---
# -----------------------------------------------------------------------
sub generate_file_list {
# Use File::Find to search for .po files:
find(\&wanted, "$po_file_path");
# Just to be sure...
scalar @source_files
or print("ERROR: No source files found? Where the hell are we?\n")
and return 0;
# Get the maximum file length and build $file_fmt
my $mlen = 0;
for my $f (@source_files) {
length($f) > $mlen and $mlen = length($f);
}
$file_fmt = sprintf("%%-%d%s", $mlen, "s");
return 1;
}
# -----------------------------------------------------------------------
# --- parse the given list for arguments. ---
# --- returns 1 on success, 0 otherwise. ---
# --- sets global $show_help to 1 if the long help should be printed. ---
# -----------------------------------------------------------------------
sub parse_args {
my @args = @_;
my $result = 1;
for (my $i = 0; $i < @args; ++$i) {
# Check for -h|--help option
# -------------------------------------------------------------------------------
if ($args[$i] =~ m/^-(?:h|-help)$/) {
$show_help = 1;
}
# Check for unknown options:
# -------------------------------------------------------------------------------
elsif ($args[$i] =~ m/^-/) {
print "ERROR: Unknown option \"$args[$1]\" encountered!\n\nUsage: $USAGE_SHORT\n";
$result = 0;
}
# Everything else is considered to the path to the .po files
# -------------------------------------------------------------------------------
else {
# But only if it is not set, yet:
if (length($po_file_path)) {
print "ERROR: Superfluous po file path \"$args[$i]\" found!\n\nUsage: $USAGE_SHORT\n";
$result = 0;
next;
}
if ( ! -d "$args[$i]") {
print "ERROR: po file path \"$args[$i]\" does not exist!\n\nUsage: $USAGE_SHORT\n";
$result = 0;
next;
}
$po_file_path = $args[$i];
}
} ## End looping arguments
# If we have no upstream path now, show short help.
if ($result && !$show_help && !length($po_file_path)) {
print "ERROR: Please provide a path to the po files!\n\nUsage: $USAGE_SHORT\n";
$result = 0;
}
return $result;
} ## parse_srgs() end
# Callback function for File::Find
sub wanted {
-f $_ and ($_ =~ m/\.po$/ )
and push @source_files, $File::Find::name;
return 1;
}
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