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114 lines
5.0 KiB
114 lines
5.0 KiB
Database Structure
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note: what's below was written for readability, not to
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indicate complex structures, all databases are normal hashes. stripped
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implies that the control field was removed, but the data afterwards kept.
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Structure of statusindex.deb
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1). Initially made in SWIM::DB_Init::database
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2). Updated in SWIM::DB::db
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3). $sb(packagename) = qw(packagename_version group priority
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status(separated with :));
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All fields stripped
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Structure of nstatusindex-arch-dists.deb
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1). Initally made in SWIM::NDB_Init::not_installed
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2). Updated in SWIM::NDB::update_packages_ndb
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3). $nsb(packagename) = qw(packagename_version group priority);
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$nsb{"/."} = qw(packagename_version ...);
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All fields stripped
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Structure of packages.deb
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1). Initally made in SWIM::DB_Init::database
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2). Updated in SWIM::DB::db
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3). %db = [ @name => (packagename packagename_version ...),
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@Tdescriptions => (packagename_version format_info ...),
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@conf => (packagename_versionCONF
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every_indented_line_after_Conffiles ...),
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@REPLACE => (packagename_version(with PRE, DEP, REC, SUG,
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CON, PRO, or REP appended)
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package_relationship_field (unstripped) ...)
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]
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Structure of npackages-arch-dists.deb
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1). Initially made in SWIM::NDB_Init::not_installed
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2). Updated in SWIM::NDB::update_packages_ndb
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3). %ndb = [ @name => (packagename packagename_version ...),
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@Tdescriptions => (packagename_version format_info ...),
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@conf => (empty),
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@REPLACE => (packagename_version(with PRE, DEP, REC, SUG,
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CON, PRO, REP, MD, and FN appended)
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package_relationship_field (unstripped) ...),
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@FILENAME => (packagename_versionFN Filename_field(stripped) ...),
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@MD5SUM => (packagename_versionMD
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package_MD5_checksum(stripped) ...),
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@revision => (packagename_versionMD(this comes from the
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Filename field) "packagename_versionMD REVISION"
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(this time the version comes from the Version
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field) ...)
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]
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The revision field is unusual and occurs in the experimental distribution.
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The hash is used by -p so that the version can be figured out. (check
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"revision: situation" in SWIM::Deb).
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Structure of groupindex.deb
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1). Initally made in SWIM::DB_Init::database
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2). Updated in SWIM::DB::db
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3). $gb(group) = qw(packagenames ......) group stripped from Section:
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Structure of ngroupindex-arch-dists.deb
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1). Initially made in SWIM::NDB_Init::not_installed
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2). Updated in SWIM::NDB::update_packages_ndb
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3). $ngb = qw(packagenames ......) group stripped from Section:
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Structure of searchindex.deb and dirindex.deb
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1). When SWIM::DB_Init::database finishes SWIM::DB_Init::md begins.
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This writes @dpackage to transfer.deb, which is processed by either
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fastswim (filedir -> big and long) or imswim (which is like longswim,
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which produces one large file - filedir.deb), and slowswim (big and
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long) into the two files big.debian and long.debian and then the
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databases are finished by SWIM::MD::process_md().
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2). Rebuilt by SWIM::DB::rebuildflatdb
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3). searchindex.deb = /path/filename\n ...... (1 package)
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dirindex.deb = /path/dir\n ...... (> 1 package)
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Structure of nsearchindex-arch-dists.deb and ndirindex-arch-dists.deb
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1). After SWIM::NDB_Init::initndb runs SWIM::NDB_Init::not_installed,
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SWIM::NDB_Init::nmd runs longswim which produces
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filedir.deb, then initndb runs slowswim producing big.debian and
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long.debian. Then the database(s) are finished by
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SWIM::MD::prcess_md.
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2).
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3). nsearchindex-arch-dists.deb = /path/filename\n ...... (1 package)
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ndirindex-arch-dists.deb = /path/dir\n ...... (> 1 package)
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Note: nsearch* includes elements which pertain to only one
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package, this generally implies files, not directories, however
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the ni often has more than one package sharing a file, so its
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placed into ndir* (this would be rare with an i system).
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SWIM::Search::search processes these two files differently,
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which is more effecient for the much larger nsearch*, for this
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reason you can't merge the two databases together.
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Structure of ncontentsindex-arch-dists.deb.
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1). A compressed Contents database, no alterations (originally the headers
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were removed, but this is a waste of time.) If the FDB (flat database
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option if given) SWIM::Library::compress_contents is called from
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initndb(), otherwise longswim called from SWIM::NDB_Init::nmd
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copies and compresses. The longswim method compresses, but
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compress_contents does a cp (not -a). In both cases the header
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removal has been depreciated. The important thing is that the utime
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remains the same.
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2). The new Contents database is copied (utime) and renamed via
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compress_contents called from SWIM::NDB.
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3). Contents format
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