racket/collects/planet/util.rkt
Robby Findler 94eb2277b7 adjust 'raco planet structure's implementation so it matches
recent changes to the fold-plt-archive function
2012-08-11 09:55:15 -05:00

828 lines
34 KiB
Racket

#lang racket/base
(require "config.rkt"
"planet-archives.rkt"
"private/planet-shared.rkt"
"private/linkage.rkt"
"private/resolver.rkt"
"private/version.rkt"
net/url
xml/xml
racket/file
racket/list
racket/contract/base
racket/port
racket/path
racket/class
racket/match
setup/pack
setup/plt-single-installer
setup/getinfo
setup/unpack
(for-syntax racket/base)
(prefix-in srfi1: srfi/1)
)
#| The util collection provides a number of useful functions for interacting with the PLaneT system. |#
(provide
current-cache-contents
current-linkage
make-planet-archive
unpack-planet-archive
force-package-building?
build-scribble-docs?
get-installed-planet-archives
get-hard-linked-packages
unlink-all
lookup-package-by-keys
resolve-planet-path
display-plt-file-structure
display-plt-archived-file
get-package-from-cache
pkg->download-url
(struct-out exn:fail:planet)
pkg-spec?
pkg?)
(provide/contract
[get-package-spec
(->* (string? string?) (natural-number/c any/c) pkg-spec?)]
[download-package
(-> pkg-spec?
(or/c string?
(list/c #t path? natural-number/c natural-number/c)
(list/c #f string?)))]
[download/install-pkg
(-> string? (and/c string? #rx"[.]plt$") natural-number/c any/c (or/c pkg? #f))]
[install-pkg
(-> pkg-spec? path-string? natural-number/c any/c (or/c pkg? #f))]
[add-hard-link
(-> string? (and/c string? #rx"[.]plt$") natural-number/c natural-number/c path? void?)]
[remove-hard-link
(->* (string? (and/c string? #rx"[.]plt$") natural-number/c natural-number/c)
(#:quiet? boolean?)
void?)]
[remove-pkg
(-> string? (and/c string? #rx"[.]plt$") natural-number/c natural-number/c void?)]
[erase-pkg
(-> string? (and/c string? #rx"[.]plt$") natural-number/c natural-number/c void?)])
;; get-package-spec : string string [nat | #f] [min-ver-spec | #f] -> pkg?
;; gets the package that corresponds to the given arguments, which are
;; values corresponding to the four parts of a package specifier in require syntax
(define (get-package-spec owner pkg [maj #f] [min #f])
(define arg
(cond
[(not maj) (list owner pkg)]
[(not min) (list owner pkg maj)]
[else (list owner pkg maj min)]))
(pkg-spec->full-pkg-spec arg #f))
;; download/install-pkg : string string nat nat -> pkg | #f
(define (download/install-pkg owner name maj min)
(let* ([pspec (pkg-spec->full-pkg-spec (list owner name maj min) #f)]
[upkg (get-package-from-server pspec)])
(cond
[(uninstalled-pkg? upkg)
(pkg-promise->pkg upkg)]
[else #f])))
;; current-cache-contents : -> ((string ((string ((nat (nat ...)) ...)) ...)) ...)
;; returns the packages installed in the local PLaneT cache
(define (current-cache-contents)
(cdr (tree->list (repository-tree))))
;; just so it will be provided
(define unlink-all remove-all-linkage!)
;; to remove:
;; -- setup-plt -c the package
;; -- remove relevant infodomain cache entries
;; -- delete files from cache directory
;; -- remove any existing linkage for package
;; returns void if the removal worked; raises an exception if no package existed.
(define (remove-pkg owner name maj min)
(let ((p (get-installed-package owner name maj min)))
(unless p
(raise (make-exn:fail:planet "Could not find package" (current-continuation-marks))))
(unless (normally-installed-pkg? p)
(raise (make-exn:fail:planet "Not a normally-installed package, can't remove" (current-continuation-marks))))
(let ((path (pkg-path p)))
(with-logging
(LOG-FILE)
(lambda ()
(printf "\n============= Removing ~a =============\n" (list owner name maj min))
(clean-planet-package path (list owner name '() maj min))))
(planet-log "Erasing metadata")
(erase-metadata p)
(planet-log "Deleting metadata and files in ~a" (path->string path))
(for ([file (in-list (dir->metadata-files path))])
(with-handlers ((exn:fail:filesystem? void))
(delete-file file)))
(delete-directory/files path)
(planet-log "Trimming empty directories")
(trim-directory (CACHE-DIR) path)
(planet-log "Rebuilding documentation index")
(reindex-user-documentation)
(void))))
;; erase-metadata : pkg -> void
;; clears out any references to the given package in planet's metadata files
;; (i.e., linkage and info.rkt cache; not hard links which are not considered metadata)
(define (erase-metadata p)
(remove-infodomain-entries (pkg-path p))
(remove-linkage-to! p))
;; this really should go somewhere else. But what should setup's behavior be
;; when a package is cleaned? should it clear info-domain entries out? I think
;; no; an uncompiled package isn't necessarily not to be indexed and so on.
;; remove-infodomain-entries : path -> void
(define (remove-infodomain-entries path)
(let* ([pathbytes (path->bytes path)]
[cache-file (build-path (PLANET-DIR) "cache.rktd")])
(when (file-exists? cache-file)
(let ([cache-lines (with-input-from-file cache-file read)])
(call-with-output-file cache-file
(λ (op)
(if (pair? cache-lines)
(write (filter
(λ (line)
(not
(and
(pair? line)
(or (not (directory-exists? (bytes->path (car line))))
(subpath? path (bytes->path (car line)))))))
cache-lines)
op)
(fprintf op "\n")))
#:exists 'truncate/replace)))))
;; subpath? : path path -> boolean
;; determines if p1 is a subpath of p2.
(define (subpath? p1 p2)
(let ([full-p1 (explode-path (simple-form-path p1))]
[full-p2 (explode-path (simple-form-path p2))])
(sublist? full-p1 full-p2 (o2 bytes=? path->bytes))))
;; o2 : (X X -> Y) (Z -> X) -> (Z Z -> Y)
;; "compose-two"
(define (o2 a b) (λ (x y) (a (b x) (b y))))
;; sublist? : (listof X) (listof X) (X X -> boolean) -> boolean
;; determine if l1 is a sublist of l2, using = as the comparison operator for elements
(define (sublist? l1 l2 =)
(cond
[(null? l1) #t]
[(null? l2) #f]
[(= (car l1) (car l2)) (sublist? (cdr l1) (cdr l2) =)]
[else #f]))
(define (erase-pkg owner name maj min)
(let* ([uninstalled-pkg-dir
(build-path (UNINSTALLED-PACKAGE-CACHE) owner name (number->string maj) (number->string min))]
[uninstalled-pkg-file (build-path uninstalled-pkg-dir name)]
[uninstalled-file-exists? (file-exists? uninstalled-pkg-file)])
(when uninstalled-file-exists?
(delete-file uninstalled-pkg-file)
(trim-directory (UNINSTALLED-PACKAGE-CACHE) uninstalled-pkg-dir))
(with-handlers ([exn:fail:planet?
(λ (e) (if uninstalled-file-exists?
;; not really a failure, just return
(void)
(raise e)))])
(remove-pkg owner name maj min))))
;; listof X * listof X -> nonempty listof X
;; returns de-prefixed version of l2 if l1 is a proper prefix of l2;
;; signals an error otherwise.
(define (drop-common-base list1 list2)
(let loop ((l1 list1) (l2 list2))
(cond
[(null? l2)
(error 'drop-common-base "root ~s is not a prefix of stem ~s" list1 list2)]
[(null? l1) l2]
[(not (equal? (car l1) (car l2)))
(error 'drop-common-base "root ~s is not a prefix of stem ~s" list1 list2)]
[else (loop (cdr l1) (cdr l2))])))
;; pathify-list : path (listof path) -> listof path
;; given a base and a list of names, interprets each name as a subdirectory
;; of the previous, starting with base, and returns a list. (This list
;; is in reverse order, so the deepest subdirectory is returned first)
(define (pathify-list root dirs)
(let loop ((base root) (dirs dirs) (acc '()))
(cond
[(null? dirs) acc]
[else
(let ((new (build-path base (car dirs))))
(loop new (cdr dirs) (cons new acc)))])))
;; directory-empty? path -> bool
;; #t iff the given directory contains no subdirectories of files
(define (directory-empty? dir)
(null? (directory-list dir)))
;; trim-directory: path path -> void
;; deletes empty directories starting with stem and working down to root
(define (trim-directory root stem)
(let* ([rootl (explode-path root)]
[steml (explode-path stem)]
[extras (cdr (pathify-list root (drop-common-base rootl steml)))])
(let loop ((dirs extras))
(cond
[(null? dirs) (void)]
[(directory-empty? (car dirs))
(delete-directory (car dirs))
(loop (cdr dirs))]
[else (void)]))))
;; regexp->filter : (string | regexp) -> (path -> bool)
;; computes a filter that accepts paths that match the given regexps and rejects other paths
(define (regexp->filter re-s)
(let ([re (cond
[(string? re-s) (regexp re-s)]
[(regexp? re-s) re-s]
[else (error 'regexp->filter "not a regular expression")])])
(lambda (p) (regexp-match re (path->bytes p)))))
(define force-package-building? (make-parameter #f))
(define build-scribble-docs? (make-parameter #t))
;; ---
;; documentation stuff --- loaded on demand so that setup/scribble can be
;; omitted in the Racket distribution
(define-namespace-anchor anchor)
;; render : path[fully-expanded scribble file path] path[fully expanded directory] boolean? -> xref?
;; renders the given scribble doc file (in src dir) into the directory
;; dir as a real scribble document
(define (render src-file dest-dir multi-page?)
(parameterize ([current-namespace (namespace-anchor->empty-namespace anchor)])
(make-directory* dest-dir)
(let* ([index-dir (if multi-page?
(let-values ([(base name dir?) (split-path dest-dir)]) base)
dest-dir)]
[renderer (new ((if multi-page?
(dynamic-require 'scribble/html-render 'render-multi-mixin)
values)
((dynamic-require 'scribble/html-render 'render-mixin)
(dynamic-require 'scribble/base-render 'render%)))
[dest-dir index-dir]
[root-path dest-dir])]
[doc (dynamic-require `(file ,(path->string src-file)) 'doc)]
[fp (send renderer traverse (list doc) (list dest-dir))]
[ci (send renderer collect (list doc) (list dest-dir) fp)]
[xref ((dynamic-require 'setup/xref 'load-collections-xref))]
[_ ((dynamic-require 'scribble/xref 'xref-transfer-info) renderer ci xref)]
[ri (send renderer resolve (list doc) (list dest-dir) ci)])
(send renderer set-external-tag-path
"/servlets/doc-search.rkt")
(send renderer render
(list doc)
(list (if multi-page?
dest-dir
(build-path dest-dir "index.html")))
ri)
;; return cross-reference info:
(send renderer serialize-info ri))))
;; this MUST BE a syntactic directory (with the trailing slash)
;; or the scribble renderer gets very confused
(define SCRIBBLE-DOCUMENT-DIR "planet-docs/")
;; scribble-entry? : Any -> Boolean
;; Recognizes valid list entries in info.rkt's scribblings field.
(define scribble-entry?
(match-lambda
[(or (list (? string?))
(list (? string?) (? scribble-flags?))
(list (? string?) (? scribble-flags?) (? scribble-category?))
(list (? string?) (? scribble-flags?) (? scribble-category?) (? string?)))
#t]
[_ #f]))
;; scribble-flags? : Any -> Boolean
;; Recognizes a list of flags from an info.rkt scribblings entry.
(define scribble-flags?
(match-lambda
[(list (? symbol?) ...) #t]
[_ #f]))
;; scribble-category : Any -> Boolean
;; Recognizes a category descriptor from an info.rkt scribblings entry.
(define scribble-category?
(match-lambda
[(or (list (? symbol?))
(list (? symbol?) (? real?))) #t]
[_ #f]))
;; scribble-entry-file : ScribbleEntry -> String
;; Produces the filename of an info.rkt scribblings entry.
(define scribble-entry-file
(match-lambda [(list file _ ...) file]))
;; scribble-entry-flags : ScribbleEntry -> (Listof Symbol)
;; Produces the list of flags from an info.rkt scribblings entry.
(define scribble-entry-flags
(match-lambda
[(list _) null]
[(list _ flags _ ...) flags]))
;; make-planet-archive: path<directory> [path<file>] -> path<file>
;; Makes a .plt archive file suitable for PLaneT whose contents are
;; all files in the given directory and returns that file's name.
;; If the optional filename argument is provided, that filename will
;; be used as the output file's name.
(define make-planet-archive
(case-lambda
[(dir)
(let-values ([(path name must-be-dir?) (split-path dir)])
(make-planet-archive
dir
(build-path (current-directory)
(string-append (path->string name) ".plt"))))]
[(dir archive-name)
(let ([abs-dir (simple-form-path dir)])
(parameterize ((current-directory abs-dir))
(let ([announcements '()]
[warnings '()]
[critical-errors '()])
(define info.rkt
(let ([real-info
(check-info.rkt-sanity
dir
(λ (msg . args) (set! announcements (cons (apply format msg args) announcements)))
(λ (bad) (set! warnings (cons bad warnings)))
(λ (err) (set! critical-errors (cons err critical-errors))))])
(or real-info (λ (x [y (λ () (error 'info.rkt (format "undefined field: ~a" x)))]) (y)))))
(let ([scribble-files (info.rkt 'scribblings (λ () '()))])
(define (outdir file-str)
(let* ([filename (file-name-from-path file-str)]
[pathname (regexp-match #rx"(.*)\\.scrbl$" (path->bytes filename))])
(build-path SCRIBBLE-DOCUMENT-DIR (bytes->path (cadr pathname)))))
(when (and (build-scribble-docs?)
(file-exists? (build-path (collection-path "setup") "scribble.rkt")))
(with-handlers ([exn:fail?
(lambda (e)
(set! critical-errors
(cons (format "Error generating scribble documentation: ~a" (render-exn e))
critical-errors)))])
(unless (list? scribble-files)
(error (format (string-append
"malformed scribblings field; expected"
" (listof (list string (listof symbol))), received ~e")
scribble-files)))
(for ([entry scribble-files])
(unless (scribble-entry? entry)
(error "malformed scribblings entry"))
(let* ([filename (scribble-entry-file entry)]
[flags (scribble-entry-flags entry)])
(unless (and (relative-path? filename)
(subpath? abs-dir filename)
(bytes=? (filename-extension filename) #"scrbl"))
(error (string-append
"illegal scribblings file ~a (must be a file with"
" extension .scrbl in the package directory or a subdirectory")))
(unless (file-exists? (build-path abs-dir filename))
(error (format "scribblings file ~a not found" filename)))
(printf "Building: ~a\n" filename)
(let* ([name.scrbl (file-name-from-path filename)]
[name (path-replace-suffix name.scrbl #"")])
(render (build-path filename)
(build-path SCRIBBLE-DOCUMENT-DIR name)
(memq 'multi-page flags))))))))
(unless (or (null? critical-errors)
(force-package-building?))
(raise-user-error '|PLaneT packager| "~a\nRefusing to continue packaging."
(if (pair? critical-errors)
(car critical-errors)
"")))
(pack archive-name
"archive"
(list ".") ;; if this changes, the filter (just below) must also change
null
(let ([p-a-f (PLANET-ARCHIVE-FILTER)])
(if p-a-f
(regexp->filter p-a-f)
(λ (p)
(or (for/and ([always-in (list 'same (string->path "planet-docs"))]
[this-one (explode-path p)])
(equal? always-in this-one))
(std-filter p)))))
#t
'file
#f
#f)
(for-each display (reverse announcements))
(newline)
(for-each (λ (s) (eprintf "WARNING:\n\t~a\n" s))
(reverse warnings))))
(simple-form-path archive-name))]))
(define (unpack-planet-archive plt-file target)
(parameterize ([current-directory target])
(unpack plt-file)))
(define (foreach-planet-archive plt-file on-dir on-file)
(fold-plt-archive plt-file
void
void
(λ (l _) (on-dir l))
(λ (l fip _) (on-file l fip))
(void)))
;; hash-tree ::= (hash-table [string -o> (union string hash-tree)])
;; chop-path : path -> (listof (union path symbol))
;; fully chops up the given path into directory list, without
;; accessing the filesystem
(define (chop-path path)
(let loop ([p path] [acc '()])
(cond
[(not (path? p)) acc]
[else
(let-values ([(base name _) (split-path p)])
(loop base (cons name acc)))])))
;; ============================================================
;; hash trees
(define (new-hash-tree)
(make-hash))
(define (hash-tree-get htree pth)
(let loop ([pth pth]
[htree htree]
[route '()])
(cond
[(null? pth) htree]
[(not (hash? htree))
(error (format "subpath ~s maps to a value" (reverse route)))]
[else
(let* ([head (car pth)]
[next (hash-ref htree
head
(λ ()
(let ([extension (new-hash-tree)])
(hash-set! htree head extension)
extension)))])
(loop (cdr pth) next (cons (car pth) route)))])))
(define (hash-tree-put-value htree pth val)
(let-values ([(where key) (split-last pth)])
(let ([ht (hash-tree-get htree where)])
(unless (hash? ht)
(error "subpath ~s maps to a value" where))
(hash-set! ht key val))))
(define (split-last l)
(let loop ([l l]
[front '()])
(cond
[(null? (cdr l)) (values (reverse front) (car l))]
[else
(loop (cdr l)
(cons (car l) front))])))
(define (hash-tree->list ht)
(let ([lst (hash-map ht
(λ (k v)
(cons k
(if (hash? v)
(hash-tree->list v)
(list v)))))])
(sort lst (λ (a b) (string<? (car a) (car b))))))
;; a 'a treelist is ::= (list string 'a) | (list string ('a treelist) ...)
;; ============================================================
;; print out file treelists (treelists where 'file is the only non-structure
;; element)
(define (print-tree t depth)
(cond
[(and (not (null? (cdr t)))
(not (pair? (cadr t))))
(printf "~a~a\n" (padding depth) (car t))]
[else
(printf "~a~a:\n" (padding depth) (car t))
(print-tree-list (cdr t) (add1 depth))]))
(define (print-tree-list ts depth)
(for-each (λ (t) (print-tree t depth)) ts))
(define (padding n)
(apply string-append (build-list n (λ (_) " "))))
;; list-plt-file-contents : path-string[.plt-file] -> void
;; prints out a manifest of the given plt file
(define (display-plt-file-structure plt-file)
(define root (new-hash-tree))
(define (gen-put f)
(λ (path) (f (chop-path (simplify-path path #f)))))
(define put-directory
(gen-put
(λ (ps)
(cond
[(equal? ps '(same)) (void)]
[else (hash-tree-get root (map path->string ps))]))))
(define put-file
(gen-put
(λ (ps)
(hash-tree-put-value root (map path->string ps) 'file))))
(foreach-planet-archive
plt-file
put-directory
(λ (p _) (put-file p)))
(print-tree-list (hash-tree->list root) 0))
;; display-plt-archived-file : path-string[.plt-file] string -> void
(define (display-plt-archived-file plt-file file-to-print)
(let/ec finished
(let ([target (simplify-path file-to-print #f)])
(foreach-planet-archive
plt-file
void
(λ (path fip)
(when (equal? (simplify-path path #f) target)
(copy-port fip (current-output-port))
(finished (void))))))
(error 'display-archived-plt-file "The given file was not found in the given package")))
;; check-info.rkt-sanity : path (string -> void) (string -> void) (string -> void) -> info.rkt-fn | #f
;; gets all the info.rkt fields that planet will use (using the info.rkt file
;; from the current directory) and calls the announce, warn, and fail functions with strings
;; that describe how PLaneT sees the info.rkt file. NOTA BENE: if this function calls fail, it may
;; also warn on the same field, and the warning may not make sense. This is based on the
;; assumption that errors will be turned into some kind of critical failure that obliterates
;; all the other information produced.
(define (check-info.rkt-sanity dir announce warn fail)
(with-handlers ([exn:fail:read?
(λ (e)
(fail (format "Package has an unreadable info.rkt file. ~a" (render-exn e)))
#f)]
[exn:fail:syntax?
(λ (e)
(fail (format "Package's info.rkt has an syntactically ill-formed info.rkt file: ~a" (render-exn e)))
#f)])
(let ([i* (get-info/full dir)])
(cond
[(not i*)
(warn (string-append
"Package has no info.rkt file. This means it will not have"
" a description or documentation on the PLaneT web site."))]
[else
(let ([i (λ (field) (i* field (λ () #f)))])
(checkinfo i fail
[name ; field name
string? ; check
(announce "Name: ~a\n" name) ; success action
(warn "Package's info.rkt file has no name field.") ;failure action
]
[blurb
(λ (b) (and (list? b) (andmap xexpr? b)))
(announce "Package blurb: ~s\n" blurb)
(unless blurb
(warn
(string-append
"Package's info.rkt does not contain a blurb field."
" Without a blurb field, the package will have no description on planet.racket-lang.org.")))]
[release-notes
(λ (b) (and (list? b) (andmap xexpr? b)))
(announce "Release notes: ~s\n" release-notes)
(unless release-notes
(warn
(string-append
"Package's info.rkt does not contain a release-notes field. Without a release-notes"
" field, the package will not have any listed release information on"
" planet.racket-lang.org beyond the contents of the blurb field.")))]
[categories
(λ (s) (and (list? s) (andmap symbol? s)))
(cond
[(ormap illegal-category categories)
=>
(λ (bad-cat)
(fail (format (string-append
"Package's info.rkt file contains illegal category \"~a\"."
" The legal categories are: ~a\n")
bad-cat
legal-categories)))]
[else (announce "Categories: ~a\n" categories)])
(unless categories
(warn (string-append
"Package's info.rkt file does not contain a category listing."
" It will be placed in the Miscellaneous category.")))]
[doc.txt
string?
(announce "doc.txt file: ~a\n" doc.txt)
(when doc.txt
(warn
(string-append
"Package's info.rkt contains a doc.txt entry, which is now considered deprecated."
" The preferred method of documentation for PLaneT packages is now Scribble"
" (see the Scribble documentation included in the Racket distribution for"
" more information).")))]
[html-docs
(lambda (s) (and (list? s) (andmap string? s)))
(warn (string-append
"Package specifies an html-docs entry. The preferred method of documentation"
" for PLaneT packages is now Scribble (see the Scribble documentation included"
" in the Racket distribution for more information)."))]
[scribblings
(lambda (s)
(and (list? s)
(andmap scribble-entry? s)))
(void)
(unless scribblings
(warn (string-append
"Package does not specify a scribblings field. Without a scribblings field,"
" the package will not have browsable online documentation.")))]
[homepage
string?
(cond
[(url-string? homepage)
(announce "Home page: ~a\n" homepage)]
[else
(fail (format (string-append
"The value of the package's info.rkt homepage field, ~s, "
"does not appear to be a legal URL.")
homepage))])]
[primary-file
(λ (x) (or (string? x) (and (list? x) (andmap string? x))))
(begin
(cond
[(string? primary-file)
(unless (file-in-current-directory? primary-file)
(warn (format (string-append
"Package's info.rkt primary-file field is ~s, a file that"
" does not exist in the package.")
primary-file)))]
[(pair? primary-file)
(let ([bad-files (filter (λ (f) (not (file-in-current-directory? f))) primary-file)])
(unless (null? bad-files)
(warn (format (string-append
"Package's info.rkt primary-file field is ~s, which contains"
" non-existant files ~s.")
primary-file bad-files))))])
(announce "Primary file: ~a\n" primary-file))
(unless primary-file
(warn
(string-append
"Package's info.rkt does not contain a primary-file field."
" The package's listing on planet.racket-lang.org will not have a"
" valid require line for your package.")))]
[required-core-version
core-version?
(announce "Required racket version: ~a\n" required-core-version)]
[repositories
(λ (x) (and (list? x)
(srfi1:lset<= equal? x '("3xx" "4.x"))))
(announce "Repositories: ~s\n" repositories)
(unless repositories
(warn (string-append
"Package's info.rkt does not contain a repositories field."
" The package will be listed in all repositories by default.")))]
[version
string?
(announce "Version description: ~a\n" version)]))])
i*)))
(define (render-exn e)
(let ([sp (open-output-string)])
(parameterize ([current-output-port sp]
[current-error-port sp])
((error-display-handler) (exn-message e) e))
(get-output-string sp)))
;; legal-categories : (listof symbol)
(define legal-categories
'(devtools net media xml datastructures io scientific
system ui metaprogramming planet misc))
;; legal-category : symbol -> boolean
;; determine if the given symbol is a legal category
(define (legal-category? x) (memq x legal-categories))
;; illegal-category : symbol -> (union symbol false)
;; returns #f if the symbol is a legal category, or the symbol itself if it isn't
(define (illegal-category s) (if (legal-category? s) #f s))
;; url-string? : string -> boolean
;; determines if the given string is a reasonable homepage url
(define (url-string? s)
(and (string? s)
(let ([u (string->url s)])
(and (url-scheme u)
(url-host u)))))
;; file-in-current-directory? : string -> boolean
;; determines if the given string represents a file in the current directory
(define (file-in-current-directory? f)
(and (string? f) (file-exists? f)))
;; core-version : string -> boolean
;; determines if the given string is something that (version) could've produced
(define (core-version? s)
(and (string? s)
(string->mz-version s)))
;; checkinfo: syntax
;; given an info.rkt function, a failure function, and a bunch of fields to check,
;; goes through the checklist calling either the success or the failure branch
;; of each check as appropriate
(define-syntax checkinfo
(syntax-rules ()
[(checkinfo fn fail clauses ...)
(let ([fn* fn] [fail* fail])
(checkinfo* () fn* fail* clauses ...))]))
(define-syntax checkinfo*
(syntax-rules ()
[(checkinfo* () fn fail) (void)]
[(checkinfo* (handler1 handler ...) fn fail) (begin handler1 handler ...)]
[(checkinfo* (handler ...) fn fail [id check on-success] clauses ...)
(checkinfo* (handler ...) fn fail [id check on-success void] clauses ...)]
[(checkinfo* (handler ...) fn fail [id check on-success on-fail] clauses ...)
(checkinfo*
(handler ...
(let ([id (fn 'id)])
(cond
[id
(let ([checked (check id)])
(unless checked
on-fail
(fail (format "Package's info.rkt contained a malformed ~a field." 'id)))
on-success)]
[else on-fail])))
fn fail clauses ...)]))
;; ============================================================
;; HARD LINKS (aka development links)
;; add-hard-link : string string num num path -> void
;; adds an entry in the hard-links table associating the given
;; require spec to the given path
(define (add-hard-link owner pkg-name maj min path)
(unless (directory-exists? path)
(if (file-exists? path)
(error 'add-hard-link "Hard links must point to directories, not files")
(eprintf "Warning: directory ~a does not exist\n"
(path->string path))))
(add-hard-link! pkg-name (list owner) maj min path))
;; remove-hard-link : string string num num (#:quiet boolean) -> void
;; removes any development association from the given package spec
(define (remove-hard-link owner pkg-name maj min #:quiet? [quiet? #false])
(define (matching-link? row)
(points-to? row pkg-name (list owner) maj min))
(when (and (empty? (filter matching-link? (get-hard-link-table)))
(not quiet?))
(error "no existing links match the given specification"))
(filter-link-table!
(lambda (row) (not (matching-link? row)))
(lambda (row)
(let ([p (row->package row)])
(when p
(erase-metadata p))))))
;; ============================================================
;; VERSION INFO
;; re-provided here for backwards compatibility (no idea
;; why it was here in the first place, actually)
(provide this-package-version
this-package-version-name
this-package-version-owner
this-package-version-maj
this-package-version-min
this-package-version-symbol
package-version->symbol
make-planet-symbol
path->package-version)