diff options
Diffstat (limited to 'guix/profiles.scm')
-rw-r--r-- | guix/profiles.scm | 139 |
1 files changed, 114 insertions, 25 deletions
diff --git a/guix/profiles.scm b/guix/profiles.scm index bf50c00a1e..701852ae98 100644 --- a/guix/profiles.scm +++ b/guix/profiles.scm @@ -454,32 +454,58 @@ denoting a specific output of a package." (define (manifest->gexp manifest) "Return a representation of MANIFEST as a gexp." + (define (optional name value) + (if (null? value) + #~() + #~((#$name #$value)))) + (define (entry->gexp entry) - (match entry - (($ <manifest-entry> name version output (? string? path) - (deps ...) (search-paths ...) _ (properties ...)) - #~(#$name #$version #$output #$path - (propagated-inputs #$(map entry->gexp deps)) - (search-paths #$(map search-path-specification->sexp - search-paths)) - #$@(if (null? properties) - #~() - #~((properties . #$properties))))) - (($ <manifest-entry> name version output package - (deps ...) (search-paths ...) _ (properties ...)) - #~(#$name #$version #$output - (ungexp package (or output "out")) - (propagated-inputs #$(map entry->gexp deps)) - (search-paths #$(map search-path-specification->sexp - search-paths)) - #$@(if (null? properties) - #~() - #~((properties . #$properties))))))) + ;; Maintain in state monad a vhash of visited entries, indexed by their + ;; item, usually package objects (we cannot use the entry itself as an + ;; index since identical entries are usually not 'eq?'). Use that vhash + ;; to avoid repeating duplicate entries. This is particularly useful in + ;; the presence of propagated inputs, where we could otherwise end up + ;; repeating large trees. + (mlet %state-monad ((visited (current-state))) + (if (match (vhash-assq (manifest-entry-item entry) visited) + ((_ . previous-entry) + (manifest-entry=? previous-entry entry)) + (#f #f)) + (return #~(repeated #$(manifest-entry-name entry) + #$(manifest-entry-version entry) + (ungexp (manifest-entry-item entry) + (manifest-entry-output entry)))) + (mbegin %state-monad + (set-current-state (vhash-consq (manifest-entry-item entry) + entry visited)) + (mlet %state-monad ((deps (mapm %state-monad entry->gexp + (manifest-entry-dependencies entry)))) + (return + (match entry + (($ <manifest-entry> name version output (? string? path) + (_ ...) (search-paths ...) _ (properties ...)) + #~(#$name #$version #$output #$path + #$@(optional 'propagated-inputs deps) + #$@(optional 'search-paths + (map search-path-specification->sexp + search-paths)) + #$@(optional 'properties properties))) + (($ <manifest-entry> name version output package + (_deps ...) (search-paths ...) _ (properties ...)) + #~(#$name #$version #$output + (ungexp package (or output "out")) + #$@(optional 'propagated-inputs deps) + #$@(optional 'search-paths + (map search-path-specification->sexp + search-paths)) + #$@(optional 'properties properties)))))))))) (match manifest (($ <manifest> (entries ...)) - #~(manifest (version 3) - (packages #$(map entry->gexp entries)))))) + #~(manifest (version 4) + (packages #$(run-with-state + (mapm %state-monad entry->gexp entries) + vlist-null)))))) (define (find-package name version) "Return a package from the distro matching NAME and possibly VERSION. This @@ -520,14 +546,15 @@ procedure is here for backward-compatibility and will eventually vanish." (item item) (parent parent)))) - (define* (sexp->manifest-entry sexp #:optional (parent (delay #f))) + (define* (sexp->manifest-entry/v3 sexp #:optional (parent (delay #f))) + ;; Read SEXP as a version 3 manifest entry. (match sexp ((name version output path ('propagated-inputs deps) ('search-paths search-paths) extra-stuff ...) ;; For each of DEPS, keep a promise pointing to ENTRY. - (letrec* ((deps* (map (cut sexp->manifest-entry <> (delay entry)) + (letrec* ((deps* (map (cut sexp->manifest-entry/v3 <> (delay entry)) deps)) (entry (manifest-entry (name name) @@ -542,6 +569,56 @@ procedure is here for backward-compatibility and will eventually vanish." '()))))) entry)))) + (define-syntax let-fields + (syntax-rules () + ;; Bind the fields NAME of LST to same-named variables in the lexical + ;; scope of BODY. + ((_ lst (name rest ...) body ...) + (let ((name (match (assq 'name lst) + ((_ value) value) + (#f '())))) + (let-fields lst (rest ...) body ...))) + ((_ lst () body ...) + (begin body ...)))) + + (define* (sexp->manifest-entry sexp #:optional (parent (delay #f))) + (match sexp + (('repeated name version path) + ;; This entry is the same as another one encountered earlier; look it + ;; up and return it. + (mlet %state-monad ((visited (current-state)) + (key -> (list name version path))) + (match (vhash-assoc key visited) + (#f + (raise (formatted-message + (G_ "invalid repeated entry in profile: ~s") + sexp))) + ((_ . entry) + (return entry))))) + ((name version output path fields ...) + (let-fields fields (propagated-inputs search-paths properties) + (mlet* %state-monad + ((entry -> #f) + (deps (mapm %state-monad + (cut sexp->manifest-entry <> (delay entry)) + propagated-inputs)) + (visited (current-state)) + (key -> (list name version path))) + (set! entry ;XXX: emulate 'letrec*' + (manifest-entry + (name name) + (version version) + (output output) + (item path) + (dependencies deps) + (search-paths (map sexp->search-path-specification + search-paths)) + (parent parent) + (properties properties))) + (mbegin %state-monad + (set-current-state (vhash-cons key entry visited)) + (return entry))))))) + (match sexp (('manifest ('version 0) ('packages ((name version output path) ...))) @@ -608,7 +685,15 @@ procedure is here for backward-compatibility and will eventually vanish." ;; Version 3 represents DEPS as full-blown manifest entries. (('manifest ('version 3 minor-version ...) ('packages (entries ...))) - (manifest (map sexp->manifest-entry entries))) + (manifest (map sexp->manifest-entry/v3 entries))) + + ;; Version 4 deduplicates repeated entries and makes manifest entry fields + ;; such as 'propagated-inputs' and 'search-paths' optional. + (('manifest ('version 4 minor-version ...) + ('packages (entries ...))) + (manifest (run-with-state + (mapm %state-monad sexp->manifest-entry entries) + vlist-null))) (_ (raise (condition (&message (message "unsupported manifest format"))))))) @@ -2317,4 +2402,8 @@ PROFILE refers to, directly or indirectly, or PROFILE." %known-shorthand-profiles) profile)) +;;; Local Variables: +;;; eval: (put 'let-fields 'scheme-indent-function 2) +;;; End: + ;;; profiles.scm ends here |