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extract: support the extraction of raw xz files

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This commit is contained in:
Norman Feske 2019-02-21 12:11:53 +01:00 committed by Christian Helmuth
parent edef2df21b
commit db8b054fa4
2 changed files with 35 additions and 9 deletions
repos/libports
run
extract.run
src/app/extract
main.cc

7
repos/libports/run/extract.run

@ -20,17 +20,22 @@ install_config {
<config verbose="yes">
<libc stdout="/dev/log" stderr="/dev/log" rtc="/dev/null"/>
<vfs>
<dir name="archived"> <rom name="test.tar.xz"/> </dir>
<dir name="archived">
<rom name="test.tar.xz"/>
<rom name="LICENSE.xz"/>
</dir>
<dir name="extracted"> <ram/> </dir>
<dir name="dev"> <log/> <null/> </dir>
</vfs>
<extract archive="/archived/test.tar.xz" to="/extracted"/>
<extract archive="/archived/LICENSE.xz" to="/extracted" name="LICENSE"/>
</config>
</start>
</config>
}
exec tar cJf [run_dir]/genode/test.tar.xz -C [genode_dir] tool/depot
exec xz < [genode_dir]/LICENSE > [run_dir]/genode/LICENSE.xz
build { app/extract }

37
repos/libports/src/app/extract/main.cc

@ -97,6 +97,7 @@ struct Extract::Extracted_archive : Noncopyable
} dst { };
typedef String<256> Path;
typedef String<80> Raw_name;
struct Exception : Genode::Exception { };
struct Open_failed : Exception { };
@ -108,15 +109,21 @@ struct Extract::Extracted_archive : Noncopyable
/**
* Constructor
*
* \param strip number of leading path elements to strip
* \param strip number of leading path elements to strip
* \param raw_name destination file name when uncompressing raw file
*
* \throw Open_failed
* \throw Read_failed
* \throw Write_failed
*
* The 'raw_name' is unused when extracting an archive.
*/
explicit Extracted_archive(Path const &path, Strip const strip)
explicit Extracted_archive(Path const &path,
Strip const strip,
Raw_name const &raw_name)
{
archive_read_support_format_all(src.ptr);
archive_read_support_format_raw(src.ptr);
archive_read_support_filter_all(src.ptr);
size_t const block_size = 10240;
@ -138,8 +145,20 @@ struct Extract::Extracted_archive : Noncopyable
throw Read_failed();
}
/* strip leading path elements */
{
bool const raw = archive_format(src.ptr) == ARCHIVE_FORMAT_RAW;
/* set destination file name when uncompressing a raw file */
if (raw) {
if (!raw_name.valid()) {
error("name of uncompressed file for ", path, " not specified");
throw Write_failed();
}
archive_entry_copy_pathname(entry, raw_name.string());
}
/* strip leading path elements when extracting an archive */
if (!raw) {
auto stripped = [] (char const *name, unsigned const n)
{
char const *s = name;
@ -204,7 +223,8 @@ struct Extract::Main
{
Env &_env;
typedef Extracted_archive::Path Path;
typedef Extracted_archive::Path Path;
typedef Extracted_archive::Raw_name Raw_name;
Attached_rom_dataspace _config { _env, "config" };
@ -218,8 +238,9 @@ struct Extract::Main
config.for_each_sub_node("extract", [&] (Xml_node node) {
Path const src_path = node.attribute_value("archive", Path());
Path const dst_path = node.attribute_value("to", Path());
Path const src_path = node.attribute_value("archive", Path());
Path const dst_path = node.attribute_value("to", Path());
Raw_name const raw_name = node.attribute_value("name", Raw_name());
Extracted_archive::Strip const strip { node.attribute_value("strip", 0U) };
@ -234,7 +255,7 @@ struct Extract::Main
chdir("/");
chdir(dst_path.string());
Extracted_archive extracted_archive(src_path, strip);
Extracted_archive extracted_archive(src_path, strip, raw_name);
success = true;
}