<!ELEMENT unpack (digest?, reference*, archive, destination)> |
This element occurs in the elements : Element : <alfs> | Element: <stage>
See also : Element : <archive> | Element: <destination> | Element: <digest> | Element: <reference>
The element unpack is one of the many main operation elements. It is used to unpack an archive into a destination directory
The sub-element reference gives the URL of the archive, which is used if the archive file is not available locally.
The sub-element digest gives the digest of the archive, as computed by openssl, using the digest type specified in the attribute type.
The sub-element archive gives the name of the archive, and the sub-element destination given the name of the directory in which the archive is unpacked
The choice of the program performing the unpacking is based on the extension of the archive file. The supported extensions are :
.tar.gz
.tar.bz2
.Z
.tgz
.gz
.bz2
.tar
.zip
Note: The use of the sub-elements digest and reference is deprecated. You should use the element download instead.
<unpack> <digest>cbe9f79450aeecfb06d5e856af16c2cf</digest> <reference>ftp://ftp.gnu.org/gnu/gzip/gzip.1.2.4a.tar.gz</reference> <archive>/usr/src/lfs-packages/gzip.1.2.4a.tar.gz</archive> <destination>/usr/src</destination> </unpack> |
The equivalent bash script is :
echo Unpacking /usr/src/lfs-packages/gzip.1.2.4a.tar.gz into /usr/src [[ ! -f /usr/src/lfs-packages/gzip.1.2.4a.tar.gz ]] && echo Retrieving ftp://ftp.gnu.org/gnu/gzip/gzip.1.2.4a.tar.gz [[ ! -f /usr/src/lfs-packages/gzip.1.2.4a.tar.gz ]] && wget -O /usr/src/lfs-packages/gzip.1.2.4a.tar.gz ftp://ftp.gnu.org/gnu/gzip/gzip.1.2.4a.tar.gz [[ ! -f /usr/src/lfs-packages/gzip.1.2.4a.tar.gz ]] && echo Archive does not exist && exit 3 cd /usr/src tar xzvf /usr/src/lfs-packages/gzip.1.2.4a.tar.gz |