824 lines
40 KiB
XML
824 lines
40 KiB
XML
<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<chapter>
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<title>File Download Support</title>
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<para>
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BitBake's fetch module is a standalone piece of library code
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that deals with the intricacies of downloading source code
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and files from remote systems.
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Fetching source code is one of the cornerstones of building software.
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As such, this module forms an important part of BitBake.
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</para>
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<para>
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The current fetch module is called "fetch2" and refers to the
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fact that it is the second major version of the API.
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The original version is obsolete and has been removed from the codebase.
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Thus, in all cases, "fetch" refers to "fetch2" in this
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manual.
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</para>
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<section id='the-download-fetch'>
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<title>The Download (Fetch)</title>
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<para>
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BitBake takes several steps when fetching source code or files.
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The fetcher codebase deals with two distinct processes in order:
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obtaining the files from somewhere (cached or otherwise)
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and then unpacking those files into a specific location and
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perhaps in a specific way.
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Getting and unpacking the files is often optionally followed
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by patching.
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Patching, however, is not covered by this module.
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</para>
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<para>
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The code to execute the first part of this process, a fetch,
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looks something like the following:
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<literallayout class='monospaced'>
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src_uri = (d.getVar('SRC_URI') or "").split()
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fetcher = bb.fetch2.Fetch(src_uri, d)
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fetcher.download()
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</literallayout>
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This code sets up an instance of the fetch class.
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The instance uses a space-separated list of URLs from the
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<link linkend='var-SRC_URI'><filename>SRC_URI</filename></link>
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variable and then calls the <filename>download</filename>
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method to download the files.
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</para>
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<para>
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The instantiation of the fetch class is usually followed by:
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<literallayout class='monospaced'>
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rootdir = l.getVar('WORKDIR')
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fetcher.unpack(rootdir)
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</literallayout>
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This code unpacks the downloaded files to the
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specified by <filename>WORKDIR</filename>.
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<note>
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For convenience, the naming in these examples matches
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the variables used by OpenEmbedded.
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If you want to see the above code in action, examine
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the OpenEmbedded class file <filename>base.bbclass</filename>.
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</note>
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The <filename>SRC_URI</filename> and <filename>WORKDIR</filename>
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variables are not hardcoded into the fetcher, since those fetcher
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methods can be (and are) called with different variable names.
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In OpenEmbedded for example, the shared state (sstate) code uses
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the fetch module to fetch the sstate files.
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</para>
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<para>
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When the <filename>download()</filename> method is called,
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BitBake tries to resolve the URLs by looking for source files
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in a specific search order:
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<itemizedlist>
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<listitem><para><emphasis>Pre-mirror Sites:</emphasis>
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BitBake first uses pre-mirrors to try and find source files.
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These locations are defined using the
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<link linkend='var-PREMIRRORS'><filename>PREMIRRORS</filename></link>
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variable.
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</para></listitem>
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<listitem><para><emphasis>Source URI:</emphasis>
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If pre-mirrors fail, BitBake uses the original URL (e.g from
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<filename>SRC_URI</filename>).
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</para></listitem>
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<listitem><para><emphasis>Mirror Sites:</emphasis>
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If fetch failures occur, BitBake next uses mirror locations as
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defined by the
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<link linkend='var-MIRRORS'><filename>MIRRORS</filename></link>
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variable.
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</para></listitem>
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</itemizedlist>
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</para>
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<para>
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For each URL passed to the fetcher, the fetcher
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calls the submodule that handles that particular URL type.
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This behavior can be the source of some confusion when you
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are providing URLs for the <filename>SRC_URI</filename>
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variable.
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Consider the following two URLs:
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<literallayout class='monospaced'>
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http://git.yoctoproject.org/git/poky;protocol=git
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git://git.yoctoproject.org/git/poky;protocol=http
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</literallayout>
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In the former case, the URL is passed to the
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<filename>wget</filename> fetcher, which does not
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understand "git".
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Therefore, the latter case is the correct form since the
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Git fetcher does know how to use HTTP as a transport.
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</para>
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<para>
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Here are some examples that show commonly used mirror
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definitions:
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<literallayout class='monospaced'>
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PREMIRRORS ?= "\
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bzr://.*/.* http://somemirror.org/sources/ \n \
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cvs://.*/.* http://somemirror.org/sources/ \n \
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git://.*/.* http://somemirror.org/sources/ \n \
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hg://.*/.* http://somemirror.org/sources/ \n \
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osc://.*/.* http://somemirror.org/sources/ \n \
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p4://.*/.* http://somemirror.org/sources/ \n \
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svn://.*/.* http://somemirror.org/sources/ \n"
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MIRRORS =+ "\
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ftp://.*/.* http://somemirror.org/sources/ \n \
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http://.*/.* http://somemirror.org/sources/ \n \
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https://.*/.* http://somemirror.org/sources/ \n"
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</literallayout>
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It is useful to note that BitBake supports
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cross-URLs.
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It is possible to mirror a Git repository on an HTTP
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server as a tarball.
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This is what the <filename>git://</filename> mapping in
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the previous example does.
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</para>
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<para>
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Since network accesses are slow, Bitbake maintains a
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cache of files downloaded from the network.
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Any source files that are not local (i.e.
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downloaded from the Internet) are placed into the download
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directory, which is specified by the
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<link linkend='var-DL_DIR'><filename>DL_DIR</filename></link>
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variable.
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</para>
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<para>
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File integrity is of key importance for reproducing builds.
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For non-local archive downloads, the fetcher code can verify
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SHA-256 and MD5 checksums to ensure the archives have been
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downloaded correctly.
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You can specify these checksums by using the
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<filename>SRC_URI</filename> variable with the appropriate
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varflags as follows:
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<literallayout class='monospaced'>
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SRC_URI[md5sum] = "<replaceable>value</replaceable>"
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SRC_URI[sha256sum] = "<replaceable>value</replaceable>"
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</literallayout>
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You can also specify the checksums as parameters on the
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<filename>SRC_URI</filename> as shown below:
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<literallayout class='monospaced'>
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SRC_URI = "http://example.com/foobar.tar.bz2;md5sum=4a8e0f237e961fd7785d19d07fdb994d"
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</literallayout>
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If multiple URIs exist, you can specify the checksums either
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directly as in the previous example, or you can name the URLs.
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The following syntax shows how you name the URIs:
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<literallayout class='monospaced'>
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SRC_URI = "http://example.com/foobar.tar.bz2;name=foo"
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SRC_URI[foo.md5sum] = 4a8e0f237e961fd7785d19d07fdb994d
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</literallayout>
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After a file has been downloaded and has had its checksum checked,
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a ".done" stamp is placed in <filename>DL_DIR</filename>.
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BitBake uses this stamp during subsequent builds to avoid
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downloading or comparing a checksum for the file again.
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<note>
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It is assumed that local storage is safe from data corruption.
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If this were not the case, there would be bigger issues to worry about.
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</note>
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</para>
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<para>
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If
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<link linkend='var-BB_STRICT_CHECKSUM'><filename>BB_STRICT_CHECKSUM</filename></link>
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is set, any download without a checksum triggers an
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error message.
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The
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<link linkend='var-BB_NO_NETWORK'><filename>BB_NO_NETWORK</filename></link>
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variable can be used to make any attempted network access a fatal
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error, which is useful for checking that mirrors are complete
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as well as other things.
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</para>
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</section>
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<section id='bb-the-unpack'>
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<title>The Unpack</title>
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<para>
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The unpack process usually immediately follows the download.
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For all URLs except Git URLs, BitBake uses the common
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<filename>unpack</filename> method.
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</para>
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<para>
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A number of parameters exist that you can specify within the
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URL to govern the behavior of the unpack stage:
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<itemizedlist>
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<listitem><para><emphasis>unpack:</emphasis>
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Controls whether the URL components are unpacked.
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If set to "1", which is the default, the components
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are unpacked.
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If set to "0", the unpack stage leaves the file alone.
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This parameter is useful when you want an archive to be
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copied in and not be unpacked.
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</para></listitem>
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<listitem><para><emphasis>dos:</emphasis>
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Applies to <filename>.zip</filename> and
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<filename>.jar</filename> files and specifies whether to
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use DOS line ending conversion on text files.
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</para></listitem>
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<listitem><para><emphasis>basepath:</emphasis>
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Instructs the unpack stage to strip the specified
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directories from the source path when unpacking.
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</para></listitem>
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<listitem><para><emphasis>subdir:</emphasis>
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Unpacks the specific URL to the specified subdirectory
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within the root directory.
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</para></listitem>
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</itemizedlist>
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The unpack call automatically decompresses and extracts files
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with ".Z", ".z", ".gz", ".xz", ".zip", ".jar", ".ipk", ".rpm".
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".srpm", ".deb" and ".bz2" extensions as well as various combinations
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of tarball extensions.
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</para>
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<para>
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As mentioned, the Git fetcher has its own unpack method that
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is optimized to work with Git trees.
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Basically, this method works by cloning the tree into the final
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directory.
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The process is completed using references so that there is
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only one central copy of the Git metadata needed.
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</para>
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</section>
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<section id='bb-fetchers'>
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<title>Fetchers</title>
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<para>
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As mentioned earlier, the URL prefix determines which
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fetcher submodule BitBake uses.
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Each submodule can support different URL parameters,
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which are described in the following sections.
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</para>
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<section id='local-file-fetcher'>
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<title>Local file fetcher (<filename>file://</filename>)</title>
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<para>
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This submodule handles URLs that begin with
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<filename>file://</filename>.
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The filename you specify within the URL can be
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either an absolute or relative path to a file.
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If the filename is relative, the contents of the
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<link linkend='var-FILESPATH'><filename>FILESPATH</filename></link>
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variable is used in the same way
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<filename>PATH</filename> is used to find executables.
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If the file cannot be found, it is assumed that it is available in
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<link linkend='var-DL_DIR'><filename>DL_DIR</filename></link>
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by the time the <filename>download()</filename> method is called.
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</para>
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<para>
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If you specify a directory, the entire directory is
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unpacked.
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</para>
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<para>
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Here are a couple of example URLs, the first relative and
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the second absolute:
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<literallayout class='monospaced'>
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SRC_URI = "file://relativefile.patch"
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SRC_URI = "file:///Users/ich/very_important_software"
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</literallayout>
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</para>
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</section>
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<section id='http-ftp-fetcher'>
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<title>HTTP/FTP wget fetcher (<filename>http://</filename>, <filename>ftp://</filename>, <filename>https://</filename>)</title>
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<para>
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This fetcher obtains files from web and FTP servers.
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Internally, the fetcher uses the wget utility.
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</para>
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<para>
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The executable and parameters used are specified by the
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<filename>FETCHCMD_wget</filename> variable, which defaults
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to sensible values.
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The fetcher supports a parameter "downloadfilename" that
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allows the name of the downloaded file to be specified.
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Specifying the name of the downloaded file is useful
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for avoiding collisions in
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<link linkend='var-DL_DIR'><filename>DL_DIR</filename></link>
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when dealing with multiple files that have the same name.
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</para>
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<para>
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Some example URLs are as follows:
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<literallayout class='monospaced'>
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SRC_URI = "http://oe.handhelds.org/not_there.aac"
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SRC_URI = "ftp://oe.handhelds.org/not_there_as_well.aac"
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SRC_URI = "ftp://you@oe.handhelds.org/home/you/secret.plan"
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</literallayout>
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</para>
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<note>
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Because URL parameters are delimited by semi-colons, this can
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introduce ambiguity when parsing URLs that also contain semi-colons,
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for example:
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<literallayout class='monospaced'>
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SRC_URI = "http://abc123.org/git/?p=gcc/gcc.git;a=snapshot;h=a5dd47"
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</literallayout>
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Such URLs should should be modified by replacing semi-colons with '&' characters:
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<literallayout class='monospaced'>
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SRC_URI = "http://abc123.org/git/?p=gcc/gcc.git&a=snapshot&h=a5dd47"
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</literallayout>
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In most cases this should work. Treating semi-colons and '&' in queries
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identically is recommended by the World Wide Web Consortium (W3C).
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Note that due to the nature of the URL, you may have to specify the name
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of the downloaded file as well:
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<literallayout class='monospaced'>
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SRC_URI = "http://abc123.org/git/?p=gcc/gcc.git&a=snapshot&h=a5dd47;downloadfilename=myfile.bz2"
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</literallayout>
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</note>
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</section>
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<section id='cvs-fetcher'>
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<title>CVS fetcher (<filename>(cvs://</filename>)</title>
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<para>
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This submodule handles checking out files from the
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CVS version control system.
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You can configure it using a number of different variables:
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<itemizedlist>
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<listitem><para><emphasis><filename>FETCHCMD_cvs</filename>:</emphasis>
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The name of the executable to use when running
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the <filename>cvs</filename> command.
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This name is usually "cvs".
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</para></listitem>
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<listitem><para><emphasis><filename>SRCDATE</filename>:</emphasis>
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The date to use when fetching the CVS source code.
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A special value of "now" causes the checkout to
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be updated on every build.
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</para></listitem>
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<listitem><para><emphasis><link linkend='var-CVSDIR'><filename>CVSDIR</filename></link>:</emphasis>
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Specifies where a temporary checkout is saved.
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The location is often <filename>DL_DIR/cvs</filename>.
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</para></listitem>
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<listitem><para><emphasis><filename>CVS_PROXY_HOST</filename>:</emphasis>
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The name to use as a "proxy=" parameter to the
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<filename>cvs</filename> command.
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</para></listitem>
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<listitem><para><emphasis><filename>CVS_PROXY_PORT</filename>:</emphasis>
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The port number to use as a "proxyport=" parameter to
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the <filename>cvs</filename> command.
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</para></listitem>
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</itemizedlist>
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As well as the standard username and password URL syntax,
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you can also configure the fetcher with various URL parameters:
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</para>
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<para>
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The supported parameters are as follows:
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<itemizedlist>
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<listitem><para><emphasis>"method":</emphasis>
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The protocol over which to communicate with the CVS
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server.
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By default, this protocol is "pserver".
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If "method" is set to "ext", BitBake examines the
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"rsh" parameter and sets <filename>CVS_RSH</filename>.
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You can use "dir" for local directories.
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</para></listitem>
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<listitem><para><emphasis>"module":</emphasis>
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Specifies the module to check out.
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You must supply this parameter.
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</para></listitem>
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<listitem><para><emphasis>"tag":</emphasis>
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Describes which CVS TAG should be used for
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the checkout.
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By default, the TAG is empty.
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</para></listitem>
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<listitem><para><emphasis>"date":</emphasis>
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Specifies a date.
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If no "date" is specified, the
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<link linkend='var-SRCDATE'><filename>SRCDATE</filename></link>
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of the configuration is used to checkout a specific date.
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The special value of "now" causes the checkout to be
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updated on every build.
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</para></listitem>
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<listitem><para><emphasis>"localdir":</emphasis>
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Used to rename the module.
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Effectively, you are renaming the output directory
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to which the module is unpacked.
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You are forcing the module into a special
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directory relative to
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<link linkend='var-CVSDIR'><filename>CVSDIR</filename></link>.
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</para></listitem>
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<listitem><para><emphasis>"rsh"</emphasis>
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Used in conjunction with the "method" parameter.
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</para></listitem>
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<listitem><para><emphasis>"scmdata":</emphasis>
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Causes the CVS metadata to be maintained in the tarball
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the fetcher creates when set to "keep".
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The tarball is expanded into the work directory.
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By default, the CVS metadata is removed.
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</para></listitem>
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<listitem><para><emphasis>"fullpath":</emphasis>
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Controls whether the resulting checkout is at the
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module level, which is the default, or is at deeper
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paths.
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</para></listitem>
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<listitem><para><emphasis>"norecurse":</emphasis>
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Causes the fetcher to only checkout the specified
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directory with no recurse into any subdirectories.
|
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</para></listitem>
|
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<listitem><para><emphasis>"port":</emphasis>
|
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The port to which the CVS server connects.
|
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</para></listitem>
|
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</itemizedlist>
|
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Some example URLs are as follows:
|
|
<literallayout class='monospaced'>
|
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SRC_URI = "cvs://CVSROOT;module=mymodule;tag=some-version;method=ext"
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SRC_URI = "cvs://CVSROOT;module=mymodule;date=20060126;localdir=usethat"
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</literallayout>
|
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</para>
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</section>
|
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|
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<section id='svn-fetcher'>
|
|
<title>Subversion (SVN) Fetcher (<filename>svn://</filename>)</title>
|
|
|
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<para>
|
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This fetcher submodule fetches code from the
|
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Subversion source control system.
|
|
The executable used is specified by
|
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<filename>FETCHCMD_svn</filename>, which defaults
|
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to "svn".
|
|
The fetcher's temporary working directory is set by
|
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<link linkend='var-SVNDIR'><filename>SVNDIR</filename></link>,
|
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which is usually <filename>DL_DIR/svn</filename>.
|
|
</para>
|
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|
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<para>
|
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The supported parameters are as follows:
|
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<itemizedlist>
|
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<listitem><para><emphasis>"module":</emphasis>
|
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The name of the svn module to checkout.
|
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You must provide this parameter.
|
|
You can think of this parameter as the top-level
|
|
directory of the repository data you want.
|
|
</para></listitem>
|
|
<listitem><para><emphasis>"path_spec":</emphasis>
|
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A specific directory in which to checkout the
|
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specified svn module.
|
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</para></listitem>
|
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<listitem><para><emphasis>"protocol":</emphasis>
|
|
The protocol to use, which defaults to "svn".
|
|
If "protocol" is set to "svn+ssh", the "ssh"
|
|
parameter is also used.
|
|
</para></listitem>
|
|
<listitem><para><emphasis>"rev":</emphasis>
|
|
The revision of the source code to checkout.
|
|
</para></listitem>
|
|
<listitem><para><emphasis>"scmdata":</emphasis>
|
|
Causes the “.svn” directories to be available during
|
|
compile-time when set to "keep".
|
|
By default, these directories are removed.
|
|
</para></listitem>
|
|
<listitem><para><emphasis>"ssh":</emphasis>
|
|
An optional parameter used when "protocol" is set
|
|
to "svn+ssh".
|
|
You can use this parameter to specify the ssh
|
|
program used by svn.
|
|
</para></listitem>
|
|
<listitem><para><emphasis>"transportuser":</emphasis>
|
|
When required, sets the username for the transport.
|
|
By default, this parameter is empty.
|
|
The transport username is different than the username
|
|
used in the main URL, which is passed to the subversion
|
|
command.
|
|
</para></listitem>
|
|
</itemizedlist>
|
|
Following are three examples using svn:
|
|
<literallayout class='monospaced'>
|
|
SRC_URI = "svn://myrepos/proj1;module=vip;protocol=http;rev=667"
|
|
SRC_URI = "svn://myrepos/proj1;module=opie;protocol=svn+ssh"
|
|
SRC_URI = "svn://myrepos/proj1;module=trunk;protocol=http;path_spec=${MY_DIR}/proj1"
|
|
</literallayout>
|
|
</para>
|
|
</section>
|
|
|
|
<section id='git-fetcher'>
|
|
<title>Git Fetcher (<filename>git://</filename>)</title>
|
|
|
|
<para>
|
|
This fetcher submodule fetches code from the Git
|
|
source control system.
|
|
The fetcher works by creating a bare clone of the
|
|
remote into
|
|
<link linkend='var-GITDIR'><filename>GITDIR</filename></link>,
|
|
which is usually <filename>DL_DIR/git2</filename>.
|
|
This bare clone is then cloned into the work directory during the
|
|
unpack stage when a specific tree is checked out.
|
|
This is done using alternates and by reference to
|
|
minimize the amount of duplicate data on the disk and
|
|
make the unpack process fast.
|
|
The executable used can be set with
|
|
<filename>FETCHCMD_git</filename>.
|
|
</para>
|
|
|
|
<para>
|
|
This fetcher supports the following parameters:
|
|
<itemizedlist>
|
|
<listitem><para><emphasis>"protocol":</emphasis>
|
|
The protocol used to fetch the files.
|
|
The default is "git" when a hostname is set.
|
|
If a hostname is not set, the Git protocol is "file".
|
|
You can also use "http", "https", "ssh" and "rsync".
|
|
</para></listitem>
|
|
<listitem><para><emphasis>"nocheckout":</emphasis>
|
|
Tells the fetcher to not checkout source code when
|
|
unpacking when set to "1".
|
|
Set this option for the URL where there is a custom
|
|
routine to checkout code.
|
|
The default is "0".
|
|
</para></listitem>
|
|
<listitem><para><emphasis>"rebaseable":</emphasis>
|
|
Indicates that the upstream Git repository can be rebased.
|
|
You should set this parameter to "1" if
|
|
revisions can become detached from branches.
|
|
In this case, the source mirror tarball is done per
|
|
revision, which has a loss of efficiency.
|
|
Rebasing the upstream Git repository could cause the
|
|
current revision to disappear from the upstream repository.
|
|
This option reminds the fetcher to preserve the local cache
|
|
carefully for future use.
|
|
The default value for this parameter is "0".
|
|
</para></listitem>
|
|
<listitem><para><emphasis>"nobranch":</emphasis>
|
|
Tells the fetcher to not check the SHA validation
|
|
for the branch when set to "1".
|
|
The default is "0".
|
|
Set this option for the recipe that refers to
|
|
the commit that is valid for a tag instead of
|
|
the branch.
|
|
</para></listitem>
|
|
<listitem><para><emphasis>"bareclone":</emphasis>
|
|
Tells the fetcher to clone a bare clone into the
|
|
destination directory without checking out a working tree.
|
|
Only the raw Git metadata is provided.
|
|
This parameter implies the "nocheckout" parameter as well.
|
|
</para></listitem>
|
|
<listitem><para><emphasis>"branch":</emphasis>
|
|
The branch(es) of the Git tree to clone.
|
|
If unset, this is assumed to be "master".
|
|
The number of branch parameters much match the number of
|
|
name parameters.
|
|
</para></listitem>
|
|
<listitem><para><emphasis>"rev":</emphasis>
|
|
The revision to use for the checkout.
|
|
The default is "master".
|
|
</para></listitem>
|
|
<listitem><para><emphasis>"tag":</emphasis>
|
|
Specifies a tag to use for the checkout.
|
|
To correctly resolve tags, BitBake must access the
|
|
network.
|
|
For that reason, tags are often not used.
|
|
As far as Git is concerned, the "tag" parameter behaves
|
|
effectively the same as the "rev" parameter.
|
|
</para></listitem>
|
|
<listitem><para><emphasis>"subpath":</emphasis>
|
|
Limits the checkout to a specific subpath of the tree.
|
|
By default, the whole tree is checked out.
|
|
</para></listitem>
|
|
<listitem><para><emphasis>"destsuffix":</emphasis>
|
|
The name of the path in which to place the checkout.
|
|
By default, the path is <filename>git/</filename>.
|
|
</para></listitem>
|
|
</itemizedlist>
|
|
Here are some example URLs:
|
|
<literallayout class='monospaced'>
|
|
SRC_URI = "git://git.oe.handhelds.org/git/vip.git;tag=version-1"
|
|
SRC_URI = "git://git.oe.handhelds.org/git/vip.git;protocol=http"
|
|
</literallayout>
|
|
</para>
|
|
</section>
|
|
|
|
<section id='gitsm-fetcher'>
|
|
<title>Git Submodule Fetcher (<filename>gitsm://</filename>)</title>
|
|
|
|
<para>
|
|
This fetcher submodule inherits from the
|
|
<link linkend='git-fetcher'>Git fetcher</link> and extends
|
|
that fetcher's behavior by fetching a repository's submodules.
|
|
<link linkend='var-SRC_URI'><filename>SRC_URI</filename></link>
|
|
is passed to the Git fetcher as described in the
|
|
"<link linkend='git-fetcher'>Git Fetcher (<filename>git://</filename>)</link>"
|
|
section.
|
|
<note>
|
|
<title>Notes and Warnings</title>
|
|
<para>
|
|
You must clean a recipe when switching between
|
|
'<filename>git://</filename>' and
|
|
'<filename>gitsm://</filename>' URLs.
|
|
</para>
|
|
|
|
<para>
|
|
The Git Submodules fetcher is not a complete fetcher
|
|
implementation.
|
|
The fetcher has known issues where it does not use the
|
|
normal source mirroring infrastructure properly. Further,
|
|
the submodule sources it fetches are not visible to the
|
|
licensing and source archiving infrastructures.
|
|
</para>
|
|
</note>
|
|
</para>
|
|
</section>
|
|
|
|
<section id='clearcase-fetcher'>
|
|
<title>ClearCase Fetcher (<filename>ccrc://</filename>)</title>
|
|
|
|
<para>
|
|
This fetcher submodule fetches code from a
|
|
<ulink url='http://en.wikipedia.org/wiki/Rational_ClearCase'>ClearCase</ulink>
|
|
repository.
|
|
</para>
|
|
|
|
<para>
|
|
To use this fetcher, make sure your recipe has proper
|
|
<link linkend='var-SRC_URI'><filename>SRC_URI</filename></link>,
|
|
<link linkend='var-SRCREV'><filename>SRCREV</filename></link>, and
|
|
<link linkend='var-PV'><filename>PV</filename></link> settings.
|
|
Here is an example:
|
|
<literallayout class='monospaced'>
|
|
SRC_URI = "ccrc://cc.example.org/ccrc;vob=/example_vob;module=/example_module"
|
|
SRCREV = "EXAMPLE_CLEARCASE_TAG"
|
|
PV = "${@d.getVar("SRCREV", False).replace("/", "+")}"
|
|
</literallayout>
|
|
The fetcher uses the <filename>rcleartool</filename> or
|
|
<filename>cleartool</filename> remote client, depending on
|
|
which one is available.
|
|
</para>
|
|
|
|
<para>
|
|
Following are options for the <filename>SRC_URI</filename>
|
|
statement:
|
|
<itemizedlist>
|
|
<listitem><para><emphasis><filename>vob</filename></emphasis>:
|
|
The name, which must include the
|
|
prepending "/" character, of the ClearCase VOB.
|
|
This option is required.
|
|
</para></listitem>
|
|
<listitem><para><emphasis><filename>module</filename></emphasis>:
|
|
The module, which must include the
|
|
prepending "/" character, in the selected VOB.
|
|
<note>
|
|
The <filename>module</filename> and <filename>vob</filename>
|
|
options are combined to create the <filename>load</filename> rule in
|
|
the view config spec.
|
|
As an example, consider the <filename>vob</filename> and
|
|
<filename>module</filename> values from the
|
|
<filename>SRC_URI</filename> statement at the start of this section.
|
|
Combining those values results in the following:
|
|
<literallayout class='monospaced'>
|
|
load /example_vob/example_module
|
|
</literallayout>
|
|
</note>
|
|
</para></listitem>
|
|
<listitem><para><emphasis><filename>proto</filename></emphasis>:
|
|
The protocol, which can be either <filename>http</filename> or
|
|
<filename>https</filename>.
|
|
</para></listitem>
|
|
</itemizedlist>
|
|
</para>
|
|
|
|
<para>
|
|
By default, the fetcher creates a configuration specification.
|
|
If you want this specification written to an area other than the default,
|
|
use the <filename>CCASE_CUSTOM_CONFIG_SPEC</filename> variable
|
|
in your recipe to define where the specification is written.
|
|
<note>
|
|
the <filename>SRCREV</filename> loses its functionality if you
|
|
specify this variable.
|
|
However, <filename>SRCREV</filename> is still used to label the
|
|
archive after a fetch even though it does not define what is
|
|
fetched.
|
|
</note>
|
|
</para>
|
|
|
|
<para>
|
|
Here are a couple of other behaviors worth mentioning:
|
|
<itemizedlist>
|
|
<listitem><para>
|
|
When using <filename>cleartool</filename>, the login of
|
|
<filename>cleartool</filename> is handled by the system.
|
|
The login require no special steps.
|
|
</para></listitem>
|
|
<listitem><para>
|
|
In order to use <filename>rcleartool</filename> with authenticated
|
|
users, an "rcleartool login" is necessary before using the fetcher.
|
|
</para></listitem>
|
|
</itemizedlist>
|
|
</para>
|
|
</section>
|
|
|
|
<section id='perforce-fetcher'>
|
|
<title>Perforce Fetcher (<filename>p4://</filename>)</title>
|
|
|
|
<para>
|
|
This fetcher submodule fetches code from the
|
|
<ulink url='https://www.perforce.com/'>Perforce</ulink>
|
|
source control system.
|
|
The executable used is specified by
|
|
<filename>FETCHCMD_p4</filename>, which defaults
|
|
to "p4".
|
|
The fetcher's temporary working directory is set by
|
|
<link linkend='var-P4DIR'><filename>P4DIR</filename></link>,
|
|
which defaults to "DL_DIR/p4".
|
|
</para>
|
|
|
|
<para>
|
|
To use this fetcher, make sure your recipe has proper
|
|
<link linkend='var-SRC_URI'><filename>SRC_URI</filename></link>,
|
|
<link linkend='var-SRCREV'><filename>SRCREV</filename></link>, and
|
|
<link linkend='var-PV'><filename>PV</filename></link> values.
|
|
The p4 executable is able to use the config file defined by your
|
|
system's <filename>P4CONFIG</filename> environment variable in
|
|
order to define the Perforce server URL and port, username, and
|
|
password if you do not wish to keep those values in a recipe
|
|
itself.
|
|
If you choose not to use <filename>P4CONFIG</filename>,
|
|
or to explicitly set variables that <filename>P4CONFIG</filename>
|
|
can contain, you can specify the <filename>P4PORT</filename> value,
|
|
which is the server's URL and port number, and you can
|
|
specify a username and password directly in your recipe within
|
|
<filename>SRC_URI</filename>.
|
|
</para>
|
|
|
|
<para>
|
|
Here is an example that relies on <filename>P4CONFIG</filename>
|
|
to specify the server URL and port, username, and password, and
|
|
fetches the Head Revision:
|
|
<literallayout class='monospaced'>
|
|
SRC_URI = "p4://example-depot/main/source/..."
|
|
SRCREV = "${AUTOREV}"
|
|
PV = "p4-${SRCPV}"
|
|
S = "${WORKDIR}/p4"
|
|
</literallayout>
|
|
</para>
|
|
|
|
<para>
|
|
Here is an example that specifies the server URL and port,
|
|
username, and password, and fetches a Revision based on a Label:
|
|
<literallayout class='monospaced'>
|
|
P4PORT = "tcp:p4server.example.net:1666"
|
|
SRC_URI = "p4://user:passwd@example-depot/main/source/..."
|
|
SRCREV = "release-1.0"
|
|
PV = "p4-${SRCPV}"
|
|
S = "${WORKDIR}/p4"
|
|
</literallayout>
|
|
<note>
|
|
You should always set <filename>S</filename>
|
|
to <filename>"${WORKDIR}/p4"</filename> in your recipe.
|
|
</note>
|
|
</para>
|
|
</section>
|
|
|
|
<section id='other-fetchers'>
|
|
<title>Other Fetchers</title>
|
|
|
|
<para>
|
|
Fetch submodules also exist for the following:
|
|
<itemizedlist>
|
|
<listitem><para>
|
|
Bazaar (<filename>bzr://</filename>)
|
|
</para></listitem>
|
|
<listitem><para>
|
|
Trees using Git Annex (<filename>gitannex://</filename>)
|
|
</para></listitem>
|
|
<listitem><para>
|
|
Secure FTP (<filename>sftp://</filename>)
|
|
</para></listitem>
|
|
<listitem><para>
|
|
Secure Shell (<filename>ssh://</filename>)
|
|
</para></listitem>
|
|
<listitem><para>
|
|
Repo (<filename>repo://</filename>)
|
|
</para></listitem>
|
|
<listitem><para>
|
|
OSC (<filename>osc://</filename>)
|
|
</para></listitem>
|
|
<listitem><para>
|
|
Mercurial (<filename>hg://</filename>)
|
|
</para></listitem>
|
|
</itemizedlist>
|
|
No documentation currently exists for these lesser used
|
|
fetcher submodules.
|
|
However, you might find the code helpful and readable.
|
|
</para>
|
|
</section>
|
|
</section>
|
|
|
|
<section id='auto-revisions'>
|
|
<title>Auto Revisions</title>
|
|
|
|
<para>
|
|
We need to document <filename>AUTOREV</filename> and
|
|
<filename>SRCREV_FORMAT</filename> here.
|
|
</para>
|
|
</section>
|
|
</chapter>
|