diff options
| -rw-r--r-- | guix/git.scm | 87 |
1 files changed, 48 insertions, 39 deletions
diff --git a/guix/git.scm b/guix/git.scm index 103749d0e2..9e89cc0062 100644 --- a/guix/git.scm +++ b/guix/git.scm @@ -28,9 +28,11 @@ #:use-module (rnrs bytevectors) #:use-module (ice-9 match) #:use-module (srfi srfi-1) + #:use-module (srfi srfi-11) #:use-module (srfi srfi-34) #:use-module (srfi srfi-35) #:export (%repository-cache-directory + update-cached-checkout latest-repository-commit)) (define %repository-cache-directory @@ -68,11 +70,6 @@ make sure no empty directory is left behind." (lambda _ (false-if-exception (rmdir directory))))) -(define (repository->head-sha1 repo) - "Return the sha1 of the HEAD commit in REPOSITORY as a string." - (let ((oid (reference-target (repository-head repo)))) - (oid->string (commit-id (commit-lookup repo oid))))) - (define (url+commit->name url sha1) "Return the string \"<REPO-NAME>-<SHA1:7>\" where REPO-NAME is the name of the git repository, extracted from URL and SHA1:7 the seven first digits @@ -82,21 +79,9 @@ of SHA1 string." (last (string-split url #\/)) ".git" "") "-" (string-take sha1 7))) -(define* (copy-to-store store cache-directory #:key url repository) - "Copy CACHE-DIRECTORY recursively to STORE. URL and REPOSITORY are used to -create the store directory name." - (define (dot-git? file stat) - (and (string=? (basename file) ".git") - (eq? 'directory (stat:type stat)))) - - (let* ((commit (repository->head-sha1 repository)) - (name (url+commit->name url commit))) - (values (add-to-store store name #t "sha256" cache-directory - #:select? (negate dot-git?)) - commit))) - (define (switch-to-ref repository ref) - "Switch to REPOSITORY's branch, commit or tag specified by REF." + "Switch to REPOSITORY's branch, commit or tag specified by REF. Return the +OID (roughly the commit hash) corresponding to REF." (define obj (match ref (('branch . branch) @@ -122,7 +107,38 @@ create the store directory name." (string-append "refs/tags/" tag)))) (object-lookup repository oid))))) - (reset repository obj RESET_HARD)) + (reset repository obj RESET_HARD) + (object-id obj)) + +(define* (update-cached-checkout url + #:key + (ref '(branch . "origin/master")) + (cache-directory + (%repository-cache-directory))) + "Update the cached checkout of URL to REF in CACHE-DIRECTORY. Return two +values: the cache directory name, and the SHA1 commit (a string) corresponding +to REF. + +REF is pair whose key is [branch | commit | tag] and value the associated +data, respectively [<branch name> | <sha1> | <tag name>]." + (with-libgit2 + (let* ((cache-dir (url-cache-directory url cache-directory)) + (cache-exists? (openable-repository? cache-dir)) + (repository (if cache-exists? + (repository-open cache-dir) + (clone* url cache-dir)))) + ;; 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))) + + ;; Reclaim file descriptors and memory mappings associated with + ;; REPOSITORY as soon as possible. + (when (module-defined? (resolve-interface '(git repository)) + 'repository-close!) + (repository-close! repository)) + + (values cache-dir (oid->string oid)))))) (define* (latest-repository-commit store url #:key @@ -137,23 +153,16 @@ data, respectively [<branch name> | <sha1> | <tag name>]. Git repositories are kept in the cache directory specified by %repository-cache-directory parameter." - (with-libgit2 - (let* ((cache-dir (url-cache-directory url cache-directory)) - (cache-exists? (openable-repository? cache-dir)) - (repository (if cache-exists? - (repository-open cache-dir) - (clone* url cache-dir)))) - ;; Only fetch remote if it has not been cloned just before. - (when cache-exists? - (remote-fetch (remote-lookup repository "origin"))) - (switch-to-ref repository ref) - - ;; Reclaim file descriptors and memory mappings associated with - ;; REPOSITORY as soon as possible. - (when (module-defined? (resolve-interface '(git repository)) - 'repository-close!) - (repository-close! repository)) + (define (dot-git? file stat) + (and (string=? (basename file) ".git") + (eq? 'directory (stat:type stat)))) - (copy-to-store store cache-dir - #:url url - #:repository repository)))) + (let*-values (((checkout commit) + (update-cached-checkout url + #:ref ref + #:cache-directory cache-directory)) + ((name) + (url+commit->name url commit))) + (values (add-to-store store name #t "sha256" checkout + #:select? (negate dot-git?)) + commit))) |