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downloader.rb: Add --help option

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Nobuyoshi Nakada 2024-03-15 14:11:16 +09:00
parent f082605735
commit eceb36c7b9
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1 changed files with 18 additions and 2 deletions
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20
tool/downloader.rb
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@ -407,26 +407,42 @@ if $0 == __FILE__
case ARGV[0] case ARGV[0]
when '-d', '--destdir' when '-d', '--destdir'
## -d, --destdir DIRECTORY Download into the directory
destdir = ARGV[1] destdir = ARGV[1]
ARGV.shift ARGV.shift
when '-p', '--prefix' when '-p', '--prefix'
# strip directory names from the name to download, and add the ## -p, --prefix Strip directory names from the name to download,
# prefix instead. ## and add the prefix instead.
prefix = ARGV[1] prefix = ARGV[1]
ARGV.shift ARGV.shift
when '-e', '--exist', '--non-existent-only' when '-e', '--exist', '--non-existent-only'
## -e, --exist, --non-existent-only Skip already existent files.
since = nil since = nil
when '-a', '--always' when '-a', '--always'
## -a, --always Download all files.
since = false since = false
when '-u', '--update', '--if-modified' when '-u', '--update', '--if-modified'
## -u, --update, --if-modified Download newer files only.
since = true since = true
when '-n', '--dryrun' when '-n', '--dryrun'
## -n, --dryrun Do not download actually.
options[:dryrun] = true options[:dryrun] = true
when '--cache-dir' when '--cache-dir'
## --cache-dir DIRECTORY Cache downloaded files in the directory.
options[:cache_dir] = ARGV[1] options[:cache_dir] = ARGV[1]
ARGV.shift ARGV.shift
when /\A--cache-dir=(.*)/m when /\A--cache-dir=(.*)/m
options[:cache_dir] = $1 options[:cache_dir] = $1
when /\A--help\z/
## --help Print this message
puts "Usage: #$0 [options] relative-url..."
File.foreach(__FILE__) do |line|
line.sub!(/^ *## /, "") or next
break if line.chomp!.empty?
opt, desc = line.split(/ {2,}/, 2)
printf " %-28s %s\n", opt, desc
end
exit
when /\A-/ when /\A-/
abort "#{$0}: unknown option #{ARGV[0]}" abort "#{$0}: unknown option #{ARGV[0]}"
else else