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(define-module (guix-qa-frontpage git-repository)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-19)
#:use-module (ice-9 popen)
#:use-module (ice-9 rdelim)
#:use-module (ice-9 threads)
#:use-module (ice-9 exceptions)
#:use-module (fibers scheduler)
#:use-module (git)
#:use-module (git rev-parse)
#:use-module (git object)
#:use-module (git oid)
#:use-module (git structs)
#:use-module (guix build utils)
#:use-module ((guix build utils) #:select (with-directory-excursion))
#:export (%git-repository-location
%git-repository-patches-remote-use-ssh?
ensure-repository-exists!
update-repository!
with-bare-git-repository
with-git-worktree
get-commit
get-git-branch-head-committer-date
get-git-merge-base
get-git-remote-branches))
(define %git-repository-location
(make-parameter #f))
(define %git-repository-patches-remote-use-ssh?
(make-parameter #f))
(define* (patches-repository-remote-url
#:key (use-ssh? (%git-repository-patches-remote-use-ssh?)))
(if use-ssh?
"git@git.qa.guix.gnu.org:guix-patches"
"https://git.qa.guix.gnu.org/git/guix-patches"))
(define* (guix.git-excursion thunk #:optional dir)
(when (current-scheduler)
(error "guix.git-excursion can't be used from fibers"))
(monitor
(with-directory-excursion (or dir (%git-repository-location))
(thunk))))
(define (ensure-repository-exists!)
(unless (file-exists? (%git-repository-location))
(when (current-scheduler)
(error "guix.git-excursion can't be used from fibers"))
(monitor
(unless (file-exists? (%git-repository-location))
(invoke "git" "init" "--bare"
(%git-repository-location))
(guix.git-excursion
(lambda ()
(invoke "git" "remote" "add" "origin"
"https://git.guix.gnu.org/guix.git")
(invoke "git" "remote" "add" "patches"
(patches-repository-remote-url))
(invoke "git" "config" "user.name" "Guix Patches Tester")
(invoke "git" "config" "user.email" "")))))))
(define (update-repository!)
(let* ((repo (repository-open (%git-repository-location)))
(patches-remote
(remote-lookup repo "patches"))
(current-patches-url
(remote-url patches-remote)))
(unless (string=?
(patches-repository-remote-url)
current-patches-url)
(remote-set-url! repo
"patches"
(patches-repository-remote-url))))
(with-bare-git-repository
(lambda ()
(invoke "git" "prune")
(invoke "git" "fetch" "--prune" "origin")
(invoke "git" "fetch" "--prune" "patches")
(invoke "git" "fetch" "--force" "--tags" "patches"))))
(define (with-bare-git-repository thunk)
(ensure-repository-exists!)
(guix.git-excursion thunk))
(define* (with-git-worktree name commit thunk
#:key remove-after?)
(with-bare-git-repository
(lambda ()
(invoke "git" "worktree" "add"
(string-append "../" name)
"-b" name
commit)))
(guix.git-excursion thunk name)
(when remove-after?
(with-bare-git-repository
(lambda ()
(system* "git" "worktree" "remove" "--force" name)
(system* "git" "branch" "-D" name)))))
(define (get-commit ref)
(ensure-repository-exists!)
(with-exception-handler
(lambda (exn)
(if (and (exception-with-irritants? exn)
(let ((irritant (first (exception-irritants exn))))
(and (git-error? irritant)
(= (git-error-code irritant) -3))))
#f
(raise-exception exn)))
(lambda ()
(let ((repo (repository-open (%git-repository-location))))
(oid->string (object-id (revparse-single repo ref)))))
#:unwind? #t))
(define (get-git-branch-head-committer-date branch)
(with-bare-git-repository
(lambda ()
(let ((pipe (open-pipe* OPEN_READ
"git" "show" "-s" "--format=%ci" branch "--")))
(let loop ((line (read-line pipe))
(lines '()))
(if (eof-object? line)
(let ((exit-val
(status:exit-val (close-pipe pipe))))
(unless (= 0 exit-val)
(raise-exception
(make-exception-with-message
(simple-format #f "error doing git show on ~A (exit-val: ~A)"
branch
exit-val))))
(if (null? lines)
#f
(string->date (first lines)
"~Y-~m-~d ~H:~M:~S ~z")))
(loop (read-line pipe)
(cons line lines))))))))
(define (get-git-merge-base a b)
(with-bare-git-repository
(lambda ()
(let ((pipe (open-pipe* OPEN_READ
"git" "merge-base" a b)))
(let loop ((line (read-line pipe))
(lines '()))
(if (eof-object? line)
(let ((exit-val
(status:exit-val (close-pipe pipe))))
(unless (= 0 exit-val)
(raise-exception
(make-exception-with-message
(simple-format #f "error doing merge-base on ~A ~A (exit-val: ~A)"
a
b
exit-val))))
(if (null? lines)
#f
(first lines)))
(loop (read-line pipe)
(cons line lines))))))))
(define (get-git-remote-branches remote)
(with-bare-git-repository
(lambda ()
(let ((pipe (open-pipe* OPEN_READ
"git" "ls-remote" "--heads" remote)))
(let loop ((line (read-line pipe))
(result '()))
(if (eof-object? line)
(let ((exit-val
(status:exit-val (close-pipe pipe))))
(unless (= 0 exit-val)
(raise-exception
(make-exception-with-message
(simple-format #f "error doing ls-remote on ~A (exit-val: ~A)"
remote
exit-val))))
result)
(let ((commit (string-take line 40))
(branch (string-drop line 52)))
(loop (read-line pipe)
(cons
`(("name" . ,branch)
("commit" . ,commit))
result)))))))))
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