#Git annex documentation archive
#Git annex documentation code
#Git annex documentation download

You specify within the URL can be either an absolute or relative path toĪ file. This submodule handles URLs that begin with file://. Each submodule can support different URL parameters, whichĪre described in the following sections. Using references so that there is only one central copy of the GitĪs mentioned earlier, the URL prefix determines which fetcher submoduleīitBake uses. Basically, this method works byĬloning the tree into the final directory. “.bz2” extensions as well as various combinations of tarball extensions.Īs mentioned, the Git fetcher has its own unpack method that is The unpack call automatically decompresses and extracts files with “.Z”, Subdir: Unpacks the specific URL to the specified subdirectory Striplevel: Strip specified number of leading components (levels) To use DOS line ending conversion on text files.

#Git annex documentation archive

When you want an archive to be copied in and not be unpacked.ĭos: Applies to. “0”, the unpack stage leaves the file alone. “1”, which is the default, the components are unpacked. Unpack: Controls whether the URL components are unpacked. URLs except Git URLs, BitBake uses the common unpack method.Ī number of parameters exist that you can specify within the URL to The unpack process usually immediately follows the download. This variable defaults to 1 so SSL certificates are normally

If BB_CHECK_SSL_CERTS is set to 0 then SSL certificate checking willīe disabled. Make any attempted network access a fatal error, which is useful forĬhecking that mirrors are complete as well as other things. This were not the case, there would be bigger issues to worry about.ĭownload without a checksum triggers an error message. It is assumed that local storage is safe from data corruption. Specify these checksums by using the SRC_URI variable with the

#Git annex documentation code

Non-local archive downloads, the fetcher code can verify SHA-256 and MD5Ĭhecksums to ensure the archives have been downloaded correctly. Which is specified by the DL_DIR variable.įile integrity is of key importance for reproducing builds.

#Git annex documentation download

Any source files that are not local (i.e.ĭownloaded from the Internet) are placed into the download directory, Since network accesses are slow, BitBake maintains a cache of filesĭownloaded from the network. It is possible to mirror a Git repository on an Some confusion when you are providing URLs for the SRC_URI variable. Locations as defined by the MIRRORS variable.įor each URL passed to the fetcher, the fetcher calls the submodule that Mirror Sites: If fetch failures occur, BitBake next uses mirror Source URI: If pre-mirrors fail, BitBake uses the original URL (e.g Pre-mirror Sites: BitBake first uses pre-mirrors to try and find URLs by looking for source files in a specific search order: When the download() method is called, BitBake tries to resolve the (sstate) code uses the fetch module to fetch the sstate files. In OpenEmbedded for example, the shared state The SRC_URI and WORKDIR variables are not hardcoded into theįetcher, since those fetcher methods can be (and are) called withĭifferent variable names. If you want to see the above code in action,Įxamine the OpenEmbedded class file base.bbclass The code to execute the first part of this process, a fetch, looksįor convenience, the naming in these examples matches the variables Patching, however, is not covered by this module. GettingĪnd unpacking the files is often optionally followed by patching. The files from somewhere (cached or otherwise) and then unpacking thoseįiles into a specific location and perhaps in a specific way. Theįetcher codebase deals with two distinct processes in order: obtaining 4.1 The Download (Fetch) īitBake takes several steps when fetching source code or files. “fetch” refers to “fetch2” in this manual.

Obsolete and has been removed from the codebase.

It is the second major version of the API. The current fetch module is called “fetch2” and refers to the fact that As such, this module forms an important part of BitBake. Fetching source code is one of the cornerstones of building With the intricacies of downloading source code and files from remote BitBake’s fetch module is a standalone piece of library code that deals