Mercurial > hg > xemacs-beta
view lisp/packages.el @ 665:fdefd0186b75
[xemacs-hg @ 2001-09-20 06:28:42 by ben]
The great integral types renaming.
The purpose of this is to rationalize the names used for various
integral types, so that they match their intended uses and follow
consist conventions, and eliminate types that were not semantically
different from each other.
The conventions are:
-- All integral types that measure quantities of anything are
signed. Some people disagree vociferously with this, but their
arguments are mostly theoretical, and are vastly outweighed by
the practical headaches of mixing signed and unsigned values,
and more importantly by the far increased likelihood of
inadvertent bugs: Because of the broken "viral" nature of
unsigned quantities in C (operations involving mixed
signed/unsigned are done unsigned, when exactly the opposite is
nearly always wanted), even a single error in declaring a
quantity unsigned that should be signed, or even the even more
subtle error of comparing signed and unsigned values and
forgetting the necessary cast, can be catastrophic, as
comparisons will yield wrong results. -Wsign-compare is turned
on specifically to catch this, but this tends to result in a
great number of warnings when mixing signed and unsigned, and
the casts are annoying. More has been written on this
elsewhere.
-- All such quantity types just mentioned boil down to EMACS_INT,
which is 32 bits on 32-bit machines and 64 bits on 64-bit
machines. This is guaranteed to be the same size as Lisp
objects of type `int', and (as far as I can tell) of size_t
(unsigned!) and ssize_t. The only type below that is not an
EMACS_INT is Hashcode, which is an unsigned value of the same
size as EMACS_INT.
-- Type names should be relatively short (no more than 10
characters or so), with the first letter capitalized and no
underscores if they can at all be avoided.
-- "count" == a zero-based measurement of some quantity. Includes
sizes, offsets, and indexes.
-- "bpos" == a one-based measurement of a position in a buffer.
"Charbpos" and "Bytebpos" count text in the buffer, rather than
bytes in memory; thus Bytebpos does not directly correspond to
the memory representation. Use "Membpos" for this.
-- "Char" refers to internal-format characters, not to the C type
"char", which is really a byte.
-- For the actual name changes, see the script below.
I ran the following script to do the conversion. (NOTE: This script
is idempotent. You can safely run it multiple times and it will
not screw up previous results -- in fact, it will do nothing if
nothing has changed. Thus, it can be run repeatedly as necessary
to handle patches coming in from old workspaces, or old branches.)
There are two tags, just before and just after the change:
`pre-integral-type-rename' and `post-integral-type-rename'. When
merging code from the main trunk into a branch, the best thing to
do is first merge up to `pre-integral-type-rename', then apply the
script and associated changes, then merge from
`post-integral-type-change' to the present. (Alternatively, just do
the merging in one operation; but you may then have a lot of
conflicts needing to be resolved by hand.)
Script `fixtypes.sh' follows:
----------------------------------- cut ------------------------------------
files="*.[ch] s/*.h m/*.h config.h.in ../configure.in Makefile.in.in ../lib-src/*.[ch] ../lwlib/*.[ch]"
gr Memory_Count Bytecount $files
gr Lstream_Data_Count Bytecount $files
gr Element_Count Elemcount $files
gr Hash_Code Hashcode $files
gr extcount bytecount $files
gr bufpos charbpos $files
gr bytind bytebpos $files
gr memind membpos $files
gr bufbyte intbyte $files
gr Extcount Bytecount $files
gr Bufpos Charbpos $files
gr Bytind Bytebpos $files
gr Memind Membpos $files
gr Bufbyte Intbyte $files
gr EXTCOUNT BYTECOUNT $files
gr BUFPOS CHARBPOS $files
gr BYTIND BYTEBPOS $files
gr MEMIND MEMBPOS $files
gr BUFBYTE INTBYTE $files
gr MEMORY_COUNT BYTECOUNT $files
gr LSTREAM_DATA_COUNT BYTECOUNT $files
gr ELEMENT_COUNT ELEMCOUNT $files
gr HASH_CODE HASHCODE $files
----------------------------------- cut ------------------------------------
`fixtypes.sh' is a Bourne-shell script; it uses 'gr':
----------------------------------- cut ------------------------------------
#!/bin/sh
# Usage is like this:
# gr FROM TO FILES ...
# globally replace FROM with TO in FILES. FROM and TO are regular expressions.
# backup files are stored in the `backup' directory.
from="$1"
to="$2"
shift 2
echo ${1+"$@"} | xargs global-replace "s/$from/$to/g"
----------------------------------- cut ------------------------------------
`gr' in turn uses a Perl script to do its real work,
`global-replace', which follows:
----------------------------------- cut ------------------------------------
: #-*- Perl -*-
### global-modify --- modify the contents of a file by a Perl expression
## Copyright (C) 1999 Martin Buchholz.
## Copyright (C) 2001 Ben Wing.
## Authors: Martin Buchholz <martin@xemacs.org>, Ben Wing <ben@xemacs.org>
## Maintainer: Ben Wing <ben@xemacs.org>
## Current Version: 1.0, May 5, 2001
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with XEmacs; see the file COPYING. If not, write to the Free
# Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
eval 'exec perl -w -S $0 ${1+"$@"}'
if 0;
use strict;
use FileHandle;
use Carp;
use Getopt::Long;
use File::Basename;
(my $myName = $0) =~ s@.*/@@; my $usage="
Usage: $myName [--help] [--backup-dir=DIR] [--line-mode] [--hunk-mode]
PERLEXPR FILE ...
Globally modify a file, either line by line or in one big hunk.
Typical usage is like this:
[with GNU print, GNU xargs: guaranteed to handle spaces, quotes, etc.
in file names]
find . -name '*.[ch]' -print0 | xargs -0 $0 's/\bCONST\b/const/g'\n
[with non-GNU print, xargs]
find . -name '*.[ch]' -print | xargs $0 's/\bCONST\b/const/g'\n
The file is read in, either line by line (with --line-mode specified)
or in one big hunk (with --hunk-mode specified; it's the default), and
the Perl expression is then evalled with \$_ set to the line or hunk of
text, including the terminating newline if there is one. It should
destructively modify the value there, storing the changed result in \$_.
Files in which any modifications are made are backed up to the directory
specified using --backup-dir, or to `backup' by default. To disable this,
use --backup-dir= with no argument.
Hunk mode is the default because it is MUCH MUCH faster than line-by-line.
Use line-by-line only when it matters, e.g. you want to do a replacement
only once per line (the default without the `g' argument). Conversely,
when using hunk mode, *ALWAYS* use `g'; otherwise, you will only make one
replacement in the entire file!
";
my %options = ();
$Getopt::Long::ignorecase = 0;
&GetOptions (
\%options,
'help', 'backup-dir=s', 'line-mode', 'hunk-mode',
);
die $usage if $options{"help"} or @ARGV <= 1;
my $code = shift;
die $usage if grep (-d || ! -w, @ARGV);
sub SafeOpen {
open ((my $fh = new FileHandle), $_[0]);
confess "Can't open $_[0]: $!" if ! defined $fh;
return $fh;
}
sub SafeClose {
close $_[0] or confess "Can't close $_[0]: $!";
}
sub FileContents {
my $fh = SafeOpen ("< $_[0]");
my $olddollarslash = $/;
local $/ = undef;
my $contents = <$fh>;
$/ = $olddollarslash;
return $contents;
}
sub WriteStringToFile {
my $fh = SafeOpen ("> $_[0]");
binmode $fh;
print $fh $_[1] or confess "$_[0]: $!\n";
SafeClose $fh;
}
foreach my $file (@ARGV) {
my $changed_p = 0;
my $new_contents = "";
if ($options{"line-mode"}) {
my $fh = SafeOpen $file;
while (<$fh>) {
my $save_line = $_;
eval $code;
$changed_p = 1 if $save_line ne $_;
$new_contents .= $_;
}
} else {
my $orig_contents = $_ = FileContents $file;
eval $code;
if ($_ ne $orig_contents) {
$changed_p = 1;
$new_contents = $_;
}
}
if ($changed_p) {
my $backdir = $options{"backup-dir"};
$backdir = "backup" if !defined ($backdir);
if ($backdir) {
my ($name, $path, $suffix) = fileparse ($file, "");
my $backfulldir = $path . $backdir;
my $backfile = "$backfulldir/$name";
mkdir $backfulldir, 0755 unless -d $backfulldir;
print "modifying $file (original saved in $backfile)\n";
rename $file, $backfile;
}
WriteStringToFile ($file, $new_contents);
}
}
----------------------------------- cut ------------------------------------
In addition to those programs, I needed to fix up a few other
things, particularly relating to the duplicate definitions of
types, now that some types merged with others. Specifically:
1. in lisp.h, removed duplicate declarations of Bytecount. The
changed code should now look like this: (In each code snippet
below, the first and last lines are the same as the original, as
are all lines outside of those lines. That allows you to locate
the section to be replaced, and replace the stuff in that
section, verifying that there isn't anything new added that
would need to be kept.)
--------------------------------- snip -------------------------------------
/* Counts of bytes or chars */
typedef EMACS_INT Bytecount;
typedef EMACS_INT Charcount;
/* Counts of elements */
typedef EMACS_INT Elemcount;
/* Hash codes */
typedef unsigned long Hashcode;
/* ------------------------ dynamic arrays ------------------- */
--------------------------------- snip -------------------------------------
2. in lstream.h, removed duplicate declaration of Bytecount.
Rewrote the comment about this type. The changed code should
now look like this:
--------------------------------- snip -------------------------------------
#endif
/* The have been some arguments over the what the type should be that
specifies a count of bytes in a data block to be written out or read in,
using Lstream_read(), Lstream_write(), and related functions.
Originally it was long, which worked fine; Martin "corrected" these to
size_t and ssize_t on the grounds that this is theoretically cleaner and
is in keeping with the C standards. Unfortunately, this practice is
horribly error-prone due to design flaws in the way that mixed
signed/unsigned arithmetic happens. In fact, by doing this change,
Martin introduced a subtle but fatal error that caused the operation of
sending large mail messages to the SMTP server under Windows to fail.
By putting all values back to be signed, avoiding any signed/unsigned
mixing, the bug immediately went away. The type then in use was
Lstream_Data_Count, so that it be reverted cleanly if a vote came to
that. Now it is Bytecount.
Some earlier comments about why the type must be signed: This MUST BE
SIGNED, since it also is used in functions that return the number of
bytes actually read to or written from in an operation, and these
functions can return -1 to signal error.
Note that the standard Unix read() and write() functions define the
count going in as a size_t, which is UNSIGNED, and the count going
out as an ssize_t, which is SIGNED. This is a horrible design
flaw. Not only is it highly likely to lead to logic errors when a
-1 gets interpreted as a large positive number, but operations are
bound to fail in all sorts of horrible ways when a number in the
upper-half of the size_t range is passed in -- this number is
unrepresentable as an ssize_t, so code that checks to see how many
bytes are actually written (which is mandatory if you are dealing
with certain types of devices) will get completely screwed up.
--ben
*/
typedef enum lstream_buffering
--------------------------------- snip -------------------------------------
3. in dumper.c, there are four places, all inside of switch()
statements, where XD_BYTECOUNT appears twice as a case tag. In
each case, the two case blocks contain identical code, and you
should *REMOVE THE SECOND* and leave the first.
| author | ben |
|---|---|
| date | Thu, 20 Sep 2001 06:31:11 +0000 |
| parents | 4bf478127536 |
| children | 6a0eecc6df0e |
line wrap: on
line source
;;; packages.el --- Low level support for XEmacs packages ;; Copyright (C) 1997 Free Software Foundation, Inc. ;; Author: Steven L Baur <steve@xemacs.org> ;; Maintainer: Steven L Baur <steve@xemacs.org> ;; Keywords: internal, lisp, dumped ;; This file is part of XEmacs. ;; XEmacs is free software; you can redistribute it and/or modify it ;; under the terms of the GNU General Public License as published by ;; the Free Software Foundation; either version 2, or (at your option) ;; any later version. ;; XEmacs is distributed in the hope that it will be useful, but ;; WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ;; General Public License for more details. ;; You should have received a copy of the GNU General Public License ;; along with XEmacs; see the file COPYING. If not, write to the Free ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA ;; 02111-1307, USA. ;;; Synched up with: Not in FSF ;;; Commentary: ;; This file is dumped with XEmacs. ;; This file provides low level facilities for XEmacs startup -- ;; particularly regarding the package setup. This code has to run in ;; what we call "bare temacs" -- i.e. XEmacs without the usual Lisp ;; environment. Pay special attention: ;; - not to use the `lambda' macro. Use #'(lambda ...) instead. ;; (this goes for any package loaded before `subr.el'.) ;; ;; - not to use macros, because they are not yet available (and this ;; file must be loadable uncompiled.) Built in macros, such as ;; `when' and `unless' are fine, of course. ;; ;; - not to use `defcustom'. If you must add user-customizable ;; variables here, use `defvar', and add the variable to ;; `cus-start.el'. ;; Because of all this, make sure that the stuff you put here really ;; belongs here. ;; This file requires find-paths.el. ;;; Code: ;;; Package versioning (defvar packages-package-list nil "Database of installed packages and version numbers") (defvar packages-hierarchy-depth 1 "Depth of package hierarchies.") (defvar packages-load-path-depth 1 "Depth of load-path search in package hierarchies.") (defvar packages-data-path-depth 1 "Depth of data-path search in package hierarchies.") (defvar early-packages nil "Packages early in the load path.") (defvar early-package-load-path nil "Load path for packages early in the load path.") (defvar late-packages nil "Packages late in the load path.") (defvar late-package-load-path nil "Load path for packages late in the load path.") (defvar last-packages nil "Packages last in the load path.") (defvar last-package-load-path nil "Load path for packages last in the load path.") (defun packages-compute-package-locations (user-init-directory) "Compute locations of the various package directories. This is a list each of whose elements describes one directory. A directory description is a three-element list. The first element is either an absolute path or a subdirectory in the XEmacs hierarchy. The second component is one of the symbols EARLY, LATE, LAST, depending on the load-path segment the hierarchy is supposed to show up in. The third component is a thunk which, if it returns NIL, causes the directory to be ignored." (list (list (paths-construct-path (list user-init-directory "mule-packages")) 'early #'(lambda () (featurep 'mule))) (list (paths-construct-path (list user-init-directory "xemacs-packages")) 'early #'(lambda () t)) (list "site-packages" 'late #'(lambda () t)) (list "infodock-packages" 'late #'(lambda () (featurep 'infodock))) (list "mule-packages" 'late #'(lambda () (featurep 'mule))) (list "xemacs-packages" 'late #'(lambda () t)))) (defun package-get-key-1 (info key) "Locate keyword `key' in list." (cond ((null info) nil) ((eq (car info) key) (nth 1 info)) (t (package-get-key-1 (cddr info) key)))) (defun package-get-key (name key) "Get info `key' from package `name'." (let ((info (assq name packages-package-list))) (when info (package-get-key-1 (cdr info) key)))) (defun package-provide (name &rest attributes) (let ((info (if (and attributes (floatp (car attributes))) (list :version (car attributes)) attributes))) (setq packages-package-list (cons (cons name info) (remassq name packages-package-list))))) (defun package-require (name version) (let ((pkg (assq name packages-package-list))) (cond ((null pkg) (error "Package %s has not been loaded into this XEmacsen" name)) ((< (package-get-key name :version) version) (error "Need version %g of package %s, got version %g" version name (cdr pkg))) (t t)))) (defun package-delete-name (name) (let (pkg) ;; Delete ALL versions of package. ;; This is pretty memory-intensive, as we use copy-alist when deleting ;; package entries, to prevent side-effects in functions that call this ;; one. (while (setq pkg (assq name packages-package-list)) (setq packages-package-list (delete pkg (copy-alist packages-package-list))) ) )) ;;; Build time stuff (defvar autoload-file-name "auto-autoloads.el" "Filename that autoloads are expected to be found in.") (defvar packages-hardcoded-lisp '( ;; Nothing at this time ) "Lisp packages that are always dumped with XEmacs. This includes every package that is loaded directly by a package listed in dumped-lisp.el and is not itself listed.") (defvar packages-useful-lisp '("bytecomp" "byte-optimize" "autoload" "shadow" "cl-macs") "Lisp packages that need early byte compilation.") (defvar packages-unbytecompiled-lisp '("paths.el" "dumped-lisp.el" "dumped-pkg-lisp.el" "version.el" "very-early-lisp.el") "Lisp packages that should not be byte compiled.") ;; Copied from help.el, could possibly move it to here permanently. ;; Unlike the FSF version, our `locate-library' uses the `locate-file' ;; primitive, which should make it lightning-fast. (defun locate-library (library &optional nosuffix path interactive-call) "Show the precise file name of Emacs library LIBRARY. This command searches the directories in `load-path' like `M-x load-library' to find the file that `M-x load-library RET LIBRARY RET' would load. Optional second arg NOSUFFIX non-nil means don't add suffixes `.elc' or `.el' to the specified name LIBRARY. If the optional third arg PATH is specified, that list of directories is used instead of `load-path'." (interactive (list (read-library-name "Locate library: ") nil nil t)) (let ((result (locate-file library (or path load-path) (cond ((or (rassq 'jka-compr-handler file-name-handler-alist) (and (boundp 'find-file-hooks) (member 'crypt-find-file-hook find-file-hooks))) ;; Compression involved. (if nosuffix '("" ".gz" ".Z" ".bz2") '(".elc" ".elc.gz" "elc.Z" ".elc.bz2" ".el" ".el.gz" ".el.Z" ".el.bz2" "" ".gz" ".Z" ".bz2"))) (t ;; No compression. (if nosuffix "" '(".elc" ".el" ""))))))) (and interactive-call (if result (message "Library is file %s" result) (message "No library %s in search path" library))) result)) (defun packages-add-suffix (str) (if (null (string-match "\\.el\\'" str)) (concat str ".elc") str)) (defun packages-list-autoloads-path () "List autoloads from precomputed load-path." (let ((path load-path) autoloads) (while path (if (file-exists-p (concat (car path) autoload-file-name)) (setq autoloads (cons (concat (car path) autoload-file-name) autoloads))) (setq path (cdr path))) autoloads)) (defun packages-list-autoloads (source-directory) "List autoload files in (what will be) the normal lisp search path. This function is used during build to find where the global symbol files so they can be perused for their useful information." (let ((files (directory-files (file-name-as-directory source-directory) t ".*")) file autolist) ;; (print (prin1-to-string source-directory)) ;; (print (prin1-to-string files)) (while (setq file (car-safe files)) (if (and (file-directory-p file) (file-exists-p (concat (file-name-as-directory file) autoload-file-name))) (setq autolist (cons (concat (file-name-as-directory file) autoload-file-name) autolist))) (setq files (cdr files))) autolist)) ;; The following function cannot be called from a bare temacs (defun packages-new-autoloads () "Return autoloads files that have been added or modified since XEmacs dump." (require 'loadhist) (let ((me (concat invocation-directory invocation-name)) (path load-path) result dir) (while path (setq dir (file-truename (car path))) (let ((autoload-file (file-name-sans-extension (concat dir autoload-file-name)))) ;; Check for: ;; 1. An auto-autoload file that hasn't provided a feature (because ;; it has been installed since XEmacs was dumped). ;; 2. auto-autoload.el being newer than the executable ;; 3. auto-autoload.elc being newer than the executable (the .el ;; could be missing or compressed) (when (or (and (null (file-provides autoload-file)) (or (file-exists-p (concat autoload-file ".elc")) (file-exists-p (concat autoload-file ".el")))) (and (file-newer-than-file-p (concat autoload-file ".el") me) (setq autoload-file (concat autoload-file ".el"))) (and (file-newer-than-file-p (concat autoload-file ".elc") me) (setq autoload-file (concat autoload-file ".elc")))) (push autoload-file result))) (setq path (cdr path))) result)) ;; The following function cannot be called from a bare temacs (defun packages-reload-autoloads () "Reload new or updated auto-autoloads files. This is an extremely dangerous function to call after the user-init-files is run. Don't call it or you'll be sorry." (let ((autoload-list (packages-new-autoloads))) (while autoload-list (let* ((autoload-file (car autoload-list)) (feature (car-safe (file-provides autoload-file)))) (when feature ;; (message "(unload-feature %S)" feature) (unload-feature feature)) (condition-case nil (load autoload-file) (t nil))) (setq autoload-list (cdr autoload-list))))) ;; Data-directory is really a list now. Provide something to search it for ;; directories. (defun locate-data-directory-list (name &optional dir-list) "Locate the matching list of directories in a search path DIR-LIST. If no DIR-LIST is supplied, it defaults to `data-directory-list'." (unless dir-list (setq dir-list data-directory-list)) (let (found found-dir found-dir-list) (while dir-list (setq found (file-name-as-directory (concat (car dir-list) name)) found-dir (file-directory-p found)) (and found-dir (setq found-dir-list (cons found found-dir-list))) (setq dir-list (cdr dir-list))) (nreverse found-dir-list))) ;; Data-directory is really a list now. Provide something to search it for ;; a directory. (defun locate-data-directory (name &optional dir-list) "Locate a directory in a search path DIR-LIST (a list of directories). If no DIR-LIST is supplied, it defaults to `data-directory-list'." (unless dir-list (setq dir-list data-directory-list)) (let (found found-dir) (while (and (null found-dir) dir-list) (setq found (file-name-as-directory (concat (car dir-list) name)) found-dir (file-directory-p found)) (or found-dir (setq found nil)) (setq dir-list (cdr dir-list))) found)) ;; Data-directory is really a list now. Provide something to search it for ;; files. (defun locate-data-file (name &optional dir-list) "Locate a file in a search path DIR-LIST (a list of directories). If no DIR-LIST is supplied, it defaults to `data-directory-list'. This function is basically a wrapper over `locate-file'." (locate-file name (or dir-list data-directory-list))) ;; Path setup (defun packages-find-package-directories (roots base) "Find a set of package directories." ;; make sure paths-find-version-directory and paths-find-site-directory ;; don't both pick up version-independent directories ... (let ((version-directory (paths-find-version-directory roots base nil nil t)) (site-directory (paths-find-site-directory roots base nil nil t))) (paths-uniq-append (and version-directory (list version-directory)) (and site-directory (list site-directory))))) (defvar packages-special-base-regexp "^\\(etc\\|info\\|man\\|lisp\\|lib-src\\|bin\\|pkginfo\\)$" "Special subdirectories of packages.") (defvar packages-no-package-hierarchy-regexp (concat "\\(" paths-version-control-filename-regexp "\\)" "\\|" "\\(" packages-special-base-regexp "\\)") "Directories which can't be the roots of package hierarchies.") (defun packages-find-packages-in-directories (directories) "Find all packages underneath directories in DIRECTORIES." (paths-find-recursive-path directories packages-hierarchy-depth packages-no-package-hierarchy-regexp)) (defun packages-split-path (path) "Split PATH at \"\", return pair with two components. The second component is shared with PATH." (let ((reverse-tail '()) (rest path)) (while (and rest (null (string-equal "" (car rest)))) (setq reverse-tail (cons (car rest) reverse-tail)) (setq rest (cdr rest))) (if (null rest) (cons path nil) (cons (nreverse reverse-tail) (cdr rest))))) (defun packages-split-package-path (package-path) "Split up PACKAGE-PATH into early, late and last components. The separation is by \"\" components. This returns (LIST EARLY-PACKAGES LATE-PACKAGES LAST-PACKAGES)." ;; When in doubt, it's late (let* ((stuff (packages-split-path package-path)) (early (and (cdr stuff) (car stuff))) (late+last (or (cdr stuff) (car stuff))) (stuff (packages-split-path late+last)) (late (car stuff)) (last (cdr stuff))) (list (packages-find-packages-in-directories early) (packages-find-packages-in-directories late) (packages-find-packages-in-directories last)))) (defun packages-deconstruct (list consumer) "Deconstruct LIST and feed it to CONSUMER." (apply consumer list)) (defun packages-find-packages-by-name (roots name) "Find a package hierarchy by its name." (packages-find-packages-in-directories (if (and (file-name-absolute-p name) (file-name-directory (expand-file-name name))) (list (file-name-as-directory (expand-file-name name))) (packages-find-package-directories roots name)))) (defun packages-find-packages-at-time (roots package-locations time &optional default) "Find packages at given time. For the format of PACKAGE-LOCATIONS, see the global variable of the same name. TIME is either 'EARLY, 'LATE, or 'LAST. DEFAULT is a default list of packages." (or default (let ((packages '())) (while package-locations (packages-deconstruct (car package-locations) #'(lambda (name a-time thunk) (if (and (eq time a-time) (funcall thunk)) (setq packages (nconc packages (packages-find-packages-by-name roots name)))))) (setq package-locations (cdr package-locations))) packages))) (defun packages-find-packages (roots package-locations) "Find the packages." (let ((envvar-value (getenv "EMACSPACKAGEPATH"))) (if envvar-value (packages-split-package-path (paths-decode-directory-path envvar-value)) (packages-deconstruct (packages-split-package-path configure-package-path) #'(lambda (configure-early-packages configure-late-packages configure-last-packages) (list (packages-find-packages-at-time roots package-locations 'early configure-early-packages) (packages-find-packages-at-time roots package-locations 'late configure-late-packages) (packages-find-packages-at-time roots package-locations 'last configure-last-packages))))))) (defun packages-find-package-library-path (packages suffixes) "Construct a path into a component of the packages hierarchy. PACKAGES is a list of package directories. SUFFIXES is a list of names of package subdirectories to look for." (let ((directories (apply #'nconc (mapcar #'(lambda (package) (mapcar #'(lambda (suffix) (file-name-as-directory (concat package suffix))) suffixes)) packages)))) (paths-directories-which-exist directories))) (defun packages-find-package-load-path (packages) "Construct the load-path component for packages. PACKAGES is a list of package directories." (paths-find-recursive-load-path (packages-find-package-library-path packages '("lisp")) packages-load-path-depth)) (defun packages-find-package-exec-path (packages) "Construct the exec-path component for packages. PACKAGES is a list of package directories." (packages-find-package-library-path packages (list (paths-construct-path (list "bin" system-configuration)) "lib-src"))) (defun packages-find-package-info-path (packages) "Construct the info-path component for packages. PACKAGES is a list of package directories." (packages-find-package-library-path packages '("info"))) (defun packages-find-package-data-path (packages) "Construct the data-path component for packages. PACKAGES is a list of package directories." (paths-find-recursive-load-path (packages-find-package-library-path packages '("etc")) packages-data-path-depth)) ;; Loading package initialization files (defun packages-load-package-lisps (package-load-path base) "Load all Lisp files of a certain name along a load path. BASE is the base name of the files." (mapcar #'(lambda (dir) (let ((file-name (expand-file-name base dir))) (condition-case error (load file-name t t) (error (warn (format "Autoload error in: %s:\n\t%s" file-name (with-output-to-string (display-error error nil)))))))) package-load-path)) (defun packages-load-package-auto-autoloads (package-load-path) "Load auto-autoload files along a load path." (packages-load-package-lisps package-load-path (file-name-sans-extension autoload-file-name))) (defun packages-handle-package-dumped-lisps (handle package-load-path) "Load dumped-lisp.el files along a load path. Call HANDLE on each file off definitions of PACKAGE-LISP there." (mapcar #'(lambda (dir) (let ((file-name (expand-file-name "dumped-lisp.el" dir))) (if (file-exists-p file-name) (let (package-lisp ;; 20.4 packages could set this preloaded-file-list) (load file-name) ;; dumped-lisp.el could have set this ... (if package-lisp (mapcar #'(lambda (base) (funcall handle base)) package-lisp)))))) package-load-path)) (defun packages-load-package-dumped-lisps (package-load-path) "Load dumped-lisp.el files along a load path. Also load files off PACKAGE-LISP definitions there." (packages-handle-package-dumped-lisps #'load package-load-path)) (defun packages-collect-package-dumped-lisps (package-load-path) "Load dumped-lisp.el files along a load path. Return list of files off PACKAGE-LISP definitions there." (let ((*files* '())) (packages-handle-package-dumped-lisps #'(lambda (file) (setq *files* (cons file *files*))) package-load-path) (reverse *files*))) (provide 'packages) ;;; packages.el ends here