diff options
Diffstat (limited to 'guix/git.scm')
| -rw-r--r-- | guix/git.scm | 90 |
1 files changed, 83 insertions, 7 deletions
diff --git a/guix/git.scm b/guix/git.scm index 193e2df111..0666f0c0a9 100644 --- a/guix/git.scm +++ b/guix/git.scm @@ -20,11 +20,14 @@ (define-module (guix git) #:use-module (git) #:use-module (git object) + #:use-module (guix i18n) #:use-module (guix base32) - #:use-module (guix hash) + #:use-module (gcrypt hash) #:use-module ((guix build utils) #:select (mkdir-p)) #:use-module (guix store) #:use-module (guix utils) + #:use-module (guix records) + #:use-module (guix gexp) #:use-module (rnrs bytevectors) #:use-module (ice-9 match) #:use-module (srfi srfi-1) @@ -33,10 +36,16 @@ #:use-module (srfi srfi-35) #:export (%repository-cache-directory update-cached-checkout - latest-repository-commit)) + latest-repository-commit + + git-checkout + git-checkout? + git-checkout-url + git-checkout-branch)) (define %repository-cache-directory - (make-parameter "/var/cache/guix/checkouts")) + (make-parameter (string-append (cache-directory #:ensure? #f) + "/checkouts"))) (define-syntax-rule (with-libgit2 thunk ...) (begin @@ -112,7 +121,7 @@ OID (roughly the commit hash) corresponding to REF." (define* (update-cached-checkout url #:key - (ref '(branch . "origin/master")) + (ref '(branch . "master")) (cache-directory (url-cache-directory url (%repository-cache-directory)))) @@ -122,6 +131,17 @@ to REF. REF is pair whose key is [branch | commit | tag] and value the associated data, respectively [<branch name> | <sha1> | <tag name>]." + (define canonical-ref + ;; We used to require callers to specify "origin/" for each branch, which + ;; made little sense since the cache should be transparent to them. So + ;; here we append "origin/" if it's missing and otherwise keep it. + (match ref + (('branch . branch) + `(branch . ,(if (string-prefix? "origin/" branch) + branch + (string-append "origin/" branch)))) + (_ ref))) + (with-libgit2 (let* ((cache-exists? (openable-repository? cache-directory)) (repository (if cache-exists? @@ -130,7 +150,7 @@ data, respectively [<branch name> | <sha1> | <tag name>]." ;; Only fetch remote if it has not been cloned just before. (when cache-exists? (remote-fetch (remote-lookup repository "origin"))) - (let ((oid (switch-to-ref repository ref))) + (let ((oid (switch-to-ref repository canonical-ref))) ;; Reclaim file descriptors and memory mappings associated with ;; REPOSITORY as soon as possible. @@ -142,9 +162,10 @@ data, respectively [<branch name> | <sha1> | <tag name>]." (define* (latest-repository-commit store url #:key + (log-port (%make-void-port "w")) (cache-directory (%repository-cache-directory)) - (ref '(branch . "origin/master"))) + (ref '(branch . "master"))) "Return two values: the content of the git repository at URL copied into a store directory and the sha1 of the top level commit in this directory. The reference to be checkout, once the repository is fetched, is specified by REF. @@ -152,11 +173,14 @@ REF is pair whose key is [branch | commit | tag] and value the associated data, respectively [<branch name> | <sha1> | <tag name>]. Git repositories are kept in the cache directory specified by -%repository-cache-directory parameter." +%repository-cache-directory parameter. + +Log progress and checkout info to LOG-PORT." (define (dot-git? file stat) (and (string=? (basename file) ".git") (eq? 'directory (stat:type stat)))) + (format log-port "updating checkout of '~a'...~%" url) (let*-values (((checkout commit) (update-cached-checkout url @@ -165,6 +189,58 @@ Git repositories are kept in the cache directory specified by (url-cache-directory url cache-directory))) ((name) (url+commit->name url commit))) + (format log-port "retrieved commit ~a~%" commit) (values (add-to-store store name #t "sha256" checkout #:select? (negate dot-git?)) commit))) + + +;;; +;;; Checkouts. +;;; + +;; Representation of the "latest" checkout of a branch or a specific commit. +(define-record-type* <git-checkout> + git-checkout make-git-checkout + git-checkout? + (url git-checkout-url) + (branch git-checkout-branch (default "master")) + (commit git-checkout-commit (default #f))) + +(define* (latest-repository-commit* url #:key ref log-port) + ;; Monadic variant of 'latest-repository-commit'. + (lambda (store) + ;; The caller--e.g., (guix scripts build)--may not handle 'git-error' so + ;; translate it into '&message' conditions that we know will be properly + ;; handled. + (catch 'git-error + (lambda () + (values (latest-repository-commit store url + #:ref ref #:log-port log-port) + store)) + (lambda (key error . _) + (raise (condition + (&message + (message + (match ref + (('commit . commit) + (format #f (G_ "cannot fetch commit ~a from ~a: ~a") + commit url (git-error-message error))) + (('branch . branch) + (format #f (G_ "cannot fetch branch '~a' from ~a: ~a") + branch url (git-error-message error))) + (_ + (format #f (G_ "Git failure while fetching ~a: ~a") + url (git-error-message error)))))))))))) + +(define-gexp-compiler (git-checkout-compiler (checkout <git-checkout>) + system target) + ;; "Compile" CHECKOUT by updating the local checkout and adding it to the + ;; store. + (match checkout + (($ <git-checkout> url branch commit) + (latest-repository-commit* url + #:ref (if commit + `(commit . ,commit) + `(branch . ,branch)) + #:log-port (current-error-port))))) |