diff options
| -rw-r--r-- | .dir-locals.el | 1 | ||||
| -rw-r--r-- | Makefile.am | 6 | ||||
| -rw-r--r-- | guix/git.scm | 40 | ||||
| -rw-r--r-- | guix/tests/git.scm | 97 | ||||
| -rw-r--r-- | tests/git.scm | 99 |
5 files changed, 242 insertions, 1 deletions
diff --git a/.dir-locals.el b/.dir-locals.el index 228685a69f..22aac2c402 100644 --- a/.dir-locals.el +++ b/.dir-locals.el @@ -90,6 +90,7 @@ (eval . (put 'eventually 'scheme-indent-function 1)) (eval . (put 'call-with-progress-reporter 'scheme-indent-function 1)) + (eval . (put 'with-temporary-git-repository 'scheme-indent-function 2)) ;; This notably allows '(' in Paredit to not insert a space when the ;; preceding symbol is one of these. diff --git a/Makefile.am b/Makefile.am index f71ea77671..658f03bd54 100644 --- a/Makefile.am +++ b/Makefile.am @@ -307,7 +307,10 @@ STORE_MODULES = \ MODULES += $(STORE_MODULES) # Internal modules with test suite support. -dist_noinst_DATA = guix/tests.scm guix/tests/http.scm +dist_noinst_DATA = \ + guix/tests.scm \ + guix/tests/http.scm \ + guix/tests/git.scm # Auxiliary files for packages. AUX_FILES = \ @@ -391,6 +394,7 @@ SCM_TESTS = \ tests/file-systems.scm \ tests/gem.scm \ tests/gexp.scm \ + tests/git.scm \ tests/glob.scm \ tests/gnu-maintenance.scm \ tests/grafts.scm \ diff --git a/guix/git.scm b/guix/git.scm index 92a7353b5a..d7dddde3a7 100644 --- a/guix/git.scm +++ b/guix/git.scm @@ -28,6 +28,7 @@ #:use-module (guix utils) #:use-module (guix records) #:use-module (guix gexp) + #:use-module (guix sets) #:use-module (rnrs bytevectors) #:use-module (ice-9 match) #:use-module (srfi srfi-1) @@ -37,8 +38,10 @@ #:export (%repository-cache-directory honor-system-x509-certificates! + with-repository update-cached-checkout latest-repository-commit + commit-difference git-checkout git-checkout? @@ -341,6 +344,43 @@ Log progress and checkout info to LOG-PORT." ;;; +;;; Commit difference. +;;; + +(define (commit-closure commit) + "Return the closure of COMMIT as a set." + (let loop ((commits (list commit)) + (visited (setq))) + (match commits + (() + visited) + ((head . tail) + (if (set-contains? visited head) + (loop tail visited) + (loop (append (commit-parents head) tail) + (set-insert head visited))))))) + +(define (commit-difference new old) + "Return the list of commits between NEW and OLD, where OLD is assumed to be +an ancestor of NEW. + +Essentially, this computes the set difference between the closure of NEW and +that of OLD." + (let loop ((commits (list new)) + (result '()) + (visited (commit-closure old))) + (match commits + (() + (reverse result)) + ((head . tail) + (if (set-contains? visited head) + (loop tail result visited) + (loop (append (commit-parents head) tail) + (cons head result) + (set-insert head visited))))))) + + +;;; ;;; Checkouts. ;;; diff --git a/guix/tests/git.scm b/guix/tests/git.scm new file mode 100644 index 0000000000..52abe77c83 --- /dev/null +++ b/guix/tests/git.scm @@ -0,0 +1,97 @@ +;;; GNU Guix --- Functional package management for GNU +;;; Copyright © 2019 Ludovic Courtès <ludo@gnu.org> +;;; +;;; This file is part of GNU Guix. +;;; +;;; GNU Guix is free software; you can redistribute it and/or modify it +;;; under the terms of the GNU General Public License as published by +;;; the Free Software Foundation; either version 3 of the License, or (at +;;; your option) any later version. +;;; +;;; GNU Guix is distributed in the hope that it will be useful, but +;;; WITHOUT ANY WARRANTY; without even the implied warranty of +;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;;; GNU General Public License for more details. +;;; +;;; You should have received a copy of the GNU General Public License +;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. + +(define-module (guix tests git) + #:use-module (git) + #:use-module (guix utils) + #:use-module (guix build utils) + #:use-module (ice-9 match) + #:use-module (ice-9 control) + #:export (git-command + with-temporary-git-repository + find-commit)) + +(define git-command + (make-parameter "git")) + +(define (populate-git-repository directory directives) + "Initialize a new Git checkout and repository in DIRECTORY and apply +DIRECTIVES. Each element of DIRECTIVES is an sexp like: + + (add \"foo.txt\" \"hi!\") + +Return DIRECTORY on success." + + ;; Note: As of version 0.2.0, Guile-Git lacks the necessary bindings to do + ;; all this, so resort to the "git" command. + (define (git command . args) + (apply invoke (git-command) "-C" directory + command args)) + + (mkdir-p directory) + (git "init") + + (let loop ((directives directives)) + (match directives + (() + directory) + ((('add file contents) rest ...) + (let ((file (string-append directory "/" file))) + (mkdir-p (dirname file)) + (call-with-output-file file + (lambda (port) + (display contents port))) + (git "add" file) + (loop rest))) + ((('commit text) rest ...) + (git "commit" "-m" text) + (loop rest)) + ((('branch name) rest ...) + (git "branch" name) + (loop rest)) + ((('checkout branch) rest ...) + (git "checkout" branch) + (loop rest)) + ((('merge branch message) rest ...) + (git "merge" branch "-m" message) + (loop rest))))) + +(define (call-with-temporary-git-repository directives proc) + (call-with-temporary-directory + (lambda (directory) + (populate-git-repository directory directives) + (proc directory)))) + +(define-syntax-rule (with-temporary-git-repository directory + directives exp ...) + "Evaluate EXP in a context where DIRECTORY contains a checkout populated as +per DIRECTIVES." + (call-with-temporary-git-repository directives + (lambda (directory) + exp ...))) + +(define (find-commit repository message) + "Return the commit in REPOSITORY whose message includes MESSAGE, a string." + (let/ec return + (fold-commits (lambda (commit _) + (and (string-contains (commit-message commit) + message) + (return commit))) + #f + repository) + (error "commit not found" message))) diff --git a/tests/git.scm b/tests/git.scm new file mode 100644 index 0000000000..8ba10ece51 --- /dev/null +++ b/tests/git.scm @@ -0,0 +1,99 @@ +;;; GNU Guix --- Functional package management for GNU +;;; Copyright © 2019 Ludovic Courtès <ludo@gnu.org> +;;; +;;; This file is part of GNU Guix. +;;; +;;; GNU Guix is free software; you can redistribute it and/or modify it +;;; under the terms of the GNU General Public License as published by +;;; the Free Software Foundation; either version 3 of the License, or (at +;;; your option) any later version. +;;; +;;; GNU Guix is distributed in the hope that it will be useful, but +;;; WITHOUT ANY WARRANTY; without even the implied warranty of +;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;;; GNU General Public License for more details. +;;; +;;; You should have received a copy of the GNU General Public License +;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. + +(define-module (test-git) + #:use-module (git) + #:use-module (guix git) + #:use-module (guix tests git) + #:use-module (guix build utils) + #:use-module (srfi srfi-1) + #:use-module (srfi srfi-64)) + +;; Test the (guix git) tools. + +(test-begin "git") + +;; 'with-temporary-git-repository' relies on the 'git' command. +(unless (which (git-command)) (test-skip 1)) +(test-assert "commit-difference, linear history" + (with-temporary-git-repository directory + '((add "a.txt" "A") + (commit "first commit") + (add "b.txt" "B") + (commit "second commit") + (add "c.txt" "C") + (commit "third commit") + (add "d.txt" "D") + (commit "fourth commit")) + (with-repository directory repository + (let ((commit1 (find-commit repository "first")) + (commit2 (find-commit repository "second")) + (commit3 (find-commit repository "third")) + (commit4 (find-commit repository "fourth"))) + (and (lset= eq? (commit-difference commit4 commit1) + (list commit2 commit3 commit4)) + (lset= eq? (commit-difference commit4 commit2) + (list commit3 commit4)) + (equal? (commit-difference commit3 commit2) + (list commit3)) + + ;; COMMIT4 is not an ancestor of COMMIT1 so we should get the + ;; empty list. + (null? (commit-difference commit1 commit4))))))) + +(unless (which (git-command)) (test-skip 1)) +(test-assert "commit-difference, fork" + (with-temporary-git-repository directory + '((add "a.txt" "A") + (commit "first commit") + (branch "devel") + (checkout "devel") + (add "devel/1.txt" "1") + (commit "first devel commit") + (add "devel/2.txt" "2") + (commit "second devel commit") + (checkout "master") + (add "b.txt" "B") + (commit "second commit") + (add "c.txt" "C") + (commit "third commit") + (merge "devel" "merge") + (add "d.txt" "D") + (commit "fourth commit")) + (with-repository directory repository + (let ((master1 (find-commit repository "first commit")) + (master2 (find-commit repository "second commit")) + (master3 (find-commit repository "third commit")) + (master4 (find-commit repository "fourth commit")) + (devel1 (find-commit repository "first devel")) + (devel2 (find-commit repository "second devel")) + (merge (find-commit repository "merge"))) + (and (equal? (commit-difference master4 merge) + (list master4)) + (lset= eq? (commit-difference master3 master1) + (list master3 master2)) + (lset= eq? (commit-difference devel2 master1) + (list devel2 devel1)) + + ;; The merge occurred between MASTER2 and MASTER4 so here we + ;; expect to see all the commits from the "devel" branch in + ;; addition to those on "master". + (lset= eq? (commit-difference master4 master2) + (list master4 merge master3 devel1 devel2))))))) + +(test-end "git") |