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build: extexi: support out-of-order blocks.

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* examples/extexi (%file_output): Remove.
(&process): Accept "FILE: BLOCK-NUM" requests.
This commit is contained in:
Akim Demaille
2012-04-08 09:45:12 +02:00
parent 5aaad6c431
commit 830e733076
1 changed files with 30 additions and 14 deletions
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44
examples/extexi
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@@ -21,6 +21,18 @@
# Usage: extexi input-file.texi ... -- [FILES to extract]
# Look for @example environments preceded with lines such as:
#
# @comment file calc.y
# or
# @comment file calc.y: 3
#
# and output their content in that file (calc.y). When numbers are
# provided, use them to decide the output order (block numbered 1 is
# output before block 2, even if the latter appears before). The same
# number may be used several time, in which case the order of
# appearance is used.
use strict;
# normalize($block)
@@ -52,9 +64,6 @@ sub message($)
# basename => full file name for files we should extract.
my %file_wanted;
# Whether we already say that file (in which case, append instead of
# create).
my %file_output;
sub process ($)
{
@@ -62,16 +71,21 @@ sub process ($)
use IO::File;
my $f = new IO::File($in)
or die "$in: cannot open: $?";
# The latest "@comment file: " argument.
# FILE-NAME => { BLOCK-NUM => CODE }
my %file;
# The latest "@comment file: FILE [BLOCK-NUM]" arguments.
my $file;
my $block;
# The @example block currently read.
my $input;
local $_;
while (<$f>)
{
if (/^\@comment file: (.*)/)
if (/^\@comment file: ([^:\n]+)(?::\s*(\d+))?$/)
{
my $f = $1;
$block = $2 || 1;
if ($file_wanted{$f})
{
$file = $file_wanted{$f};
@@ -86,7 +100,6 @@ sub process ($)
{
if (/^\@(small)?example$/)
{
$input = $file_output{$file} ? "\n" : "";
# Bison supports synclines, but not Flex.
$input .= sprintf ("#line %s \"$in\"\n", $. + 1)
if $file =~ /\.[chy]*$/;
@@ -97,22 +110,25 @@ sub process ($)
die "no contents: $file"
if $input eq "";
$input = normalize($input);
# No spurious end of line: use printf.
my $o =
($file_output{$file}
? new IO::File(">>$file")
: new IO::File(">$file"));
print $o $input;
$file_output{$file} = 1;
$file{$file}{$block} .= normalize($input);
$file = $input = undef;
++$block;
}
else
{
$input .= $_;
}
}
}
# Output the files.
for my $file (keys %file)
{
# No spurious end of line: use printf.
my $o = new IO::File(">$file")
or die "$file: cannot create: $?";
print $o $file{$file}{$_}
for sort keys %{$file{$file}};
}
}