diff options
Diffstat (limited to 'guix/hg-download.scm')
| -rw-r--r-- | guix/hg-download.scm | 127 |
1 files changed, 75 insertions, 52 deletions
diff --git a/guix/hg-download.scm b/guix/hg-download.scm index 55d908817f..df48ed6eb7 100644 --- a/guix/hg-download.scm +++ b/guix/hg-download.scm @@ -30,6 +30,7 @@ #:use-module (ice-9 match) #:use-module (ice-9 popen) #:use-module (ice-9 rdelim) + #:use-module (rnrs bytevectors) #:export (hg-reference hg-reference? hg-reference-url @@ -58,13 +59,7 @@ (let ((distro (resolve-interface '(gnu packages version-control)))) (module-ref distro 'mercurial))) -(define* (hg-fetch ref hash-algo hash - #:optional name - #:key (system (%current-system)) (guile (default-guile)) - (hg (hg-package))) - "Return a fixed-output derivation that fetches REF, a <hg-reference> -object. The output is expected to have recursive hash HASH of type -HASH-ALGO (a symbol). Use NAME as the file name, or a generic name if #f." +(define (hg-fetch-builder hg hash-algo) (define inputs ;; The 'swh-download' procedure requires tar and gzip. `(("gzip" ,(module-ref (resolve-interface '(gnu packages compression)) @@ -88,56 +83,84 @@ HASH-ALGO (a symbol). Use NAME as the file name, or a generic name if #f." (guix build download-nar) (guix swh))))) - (define build - (with-imported-modules modules - (with-extensions (list guile-json gnutls ;for (guix swh) - guile-lzlib) - #~(begin - (use-modules (guix build hg) - (guix build utils) ;for `set-path-environment-variable' - ((guix build download) - #:select (download-method-enabled?)) - (guix build download-nar) - (guix swh) - (ice-9 match)) - - (set-path-environment-variable "PATH" '("bin") - (match '#+inputs - (((names dirs outputs ...) ...) - dirs))) - - (setvbuf (current-output-port) 'line) - (setvbuf (current-error-port) 'line) - - (or (and (download-method-enabled? 'upstream) - (hg-fetch '#$(hg-reference-url ref) - '#$(hg-reference-changeset ref) - #$output - #:hg-command (string-append #+hg "/bin/hg"))) - (and (download-method-enabled? 'nar) - (download-nar #$output)) - ;; As a last resort, attempt to download from Software Heritage. - ;; Disable X.509 certificate verification to avoid depending - ;; on nss-certs--we're authenticating the checkout anyway. - (and (download-method-enabled? 'swh) - (parameterize ((%verify-swh-certificate? #f)) - (format (current-error-port) - "Trying to download from Software Heritage...~%") - (or (swh-download-directory-by-nar-hash - #$hash '#$hash-algo #$output) - (swh-download #$(hg-reference-url ref) - #$(hg-reference-changeset ref) - #$output))))))))) + (with-imported-modules modules + (with-extensions (list guile-json gnutls ;for (guix swh) + guile-lzlib) + #~(begin + (use-modules (guix build hg) + (guix build utils) ;for `set-path-environment-variable' + ((guix build download) + #:select (download-method-enabled?)) + (guix build download-nar) + (guix swh) + (ice-9 match) + (rnrs bytevectors)) + + (set-path-environment-variable "PATH" '("bin") + (match '#+inputs + (((names dirs outputs ...) ...) + dirs))) + + (setvbuf (current-output-port) 'line) + (setvbuf (current-error-port) 'line) + + (or (and (download-method-enabled? 'upstream) + (hg-fetch (getenv "hg ref url") + (getenv "hg ref changeset") + #$output + #:hg-command (string-append #+hg "/bin/hg"))) + (and (download-method-enabled? 'nar) + (download-nar #$output)) + ;; As a last resort, attempt to download from Software Heritage. + ;; Disable X.509 certificate verification to avoid depending + ;; on nss-certs--we're authenticating the checkout anyway. + (and (download-method-enabled? 'swh) + (parameterize ((%verify-swh-certificate? #f)) + (format (current-error-port) + "Trying to download from Software Heritage...~%") + (or (swh-download-directory-by-nar-hash + (u8-list->bytevector + (map string->number + (string-split (getenv "hash") #\,))) + '#$hash-algo + #$output) + (swh-download (getenv "hg ref url") + (getenv "hg ref changeset") + #$output))))))))) +(define* (hg-fetch ref hash-algo hash + #:optional name + #:key (system (%current-system)) (guile (default-guile)) + (hg (hg-package))) + "Return a fixed-output derivation that fetches REF, a <hg-reference> +object. The output is expected to have recursive hash HASH of type +HASH-ALGO (a symbol). Use NAME as the file name, or a generic name if #f." (mlet %store-monad ((guile (package->derivation guile system))) - (gexp->derivation (or name "hg-checkout") build + (gexp->derivation (or name "hg-checkout") + ;; Avoid the builder differing for every single use as + ;; having less builder is more efficient for computing + ;; derivations. + ;; + ;; Don't pass package specific data in to the following + ;; procedure, use #:env-vars below instead. + (hg-fetch-builder hg hash-algo) #:leaked-env-vars '("http_proxy" "https_proxy" "LC_ALL" "LC_MESSAGES" "LANG" "COLUMNS") - #:env-vars (match (getenv "GUIX_DOWNLOAD_METHODS") - (#f '()) - (value - `(("GUIX_DOWNLOAD_METHODS" . ,value)))) + #:env-vars + `(("hg ref url" . ,(hg-reference-url ref)) + ("hg ref changeset" . ,(hg-reference-changeset ref)) + ;; To avoid pulling in (guix base32) in the builder + ;; script, use bytevector->u8-list from (rnrs + ;; bytevectors) + ("hash" . ,(string-join + (map number->string + (bytevector->u8-list hash)) + ",")) + ,@(match (getenv "GUIX_DOWNLOAD_METHODS") + (#f '()) + (value + `(("GUIX_DOWNLOAD_METHODS" . ,value))))) #:system system #:local-build? #t ;don't offload repo cloning #:hash-algo hash-algo |