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(define-module (gitto main)
#:use-module (ice-9 format)
#:use-module (ice-9 getopt-long)
#:use-module (ice-9 popen)
#:use-module (ice-9 rdelim)
#:export (main))
(define data-dir
(let ((xdg (getenv "XGD_DATA_HOME"))
(name "gitto"))
(if xdg
(string-append xdg "/" name)
(string-append (getenv "HOME") "/." name))))
(define repositories-file
(string-append data-dir "/repos.scm"))
(define repositories
(if (file-exists? repositories-file)
(let* ((port (open-input-file repositories-file))
(result (read port)))
(close-port port)
result)
'()))
(define (version)
"Display version information"
(display "gitto version 0.1\n"))
(define (help)
"Display some help."
(display "\
gitto [options]
-r, --register REPO Register a new repository directory
-R, --remove REPO Repmove a repository directory
-l, --repositories List all registered repositories' locations
-v, --version Display version
-h, --help Display this help
"))
(define (git-dir? dir)
"Check whether or not DIR/.git exists"
(let ((dir (string-append dir "/.git")))
(if (file-exists? dir)
(let ((dirstat (stat dir)))
(eq? (stat:type dirstat) 'directory))
#f)))
(define (save-repositories-list)
"Save the list of repositories."
(if (not (file-exists? data-dir))
(mkdir data-dir))
;; Sort first
(set! repositories
(sort repositories
(lambda (s1 s2)
(string<? (basename s1) (basename s2)))))
(let ((port (open-output-file repositories-file)))
(write repositories port)
(close-port port)))
(define (register-repository repository)
(if (not (member repository repositories))
(begin
(set! repositories (append `(,repository) repositories))
(save-repositories-list)
(simple-format #t "Repository ~A registered." repository))
(display "Repository already registered."))
(newline))
(define (remove-repository repository)
(if (member repository repositories)
(begin
(set! repositories (delete repository repositories))
(save-repositories-list)
(simple-format #t "Repository ~A removed." repository))
(display "Not a registered repository."))
(newline))
(define (git-revs-to-push)
(let* ((pipe (open-input-pipe
"git log --pretty=oneline @{u}.. 2>/dev/null | wc -l"))
(num (string->number (read-line pipe))))
(close-pipe pipe)
num))
(define (git-revs-to-pull)
(let* ((pipe (open-input-pipe
"git log --pretty=oneline ..@{u} 2>/dev/null | wc -l"))
(num (string->number (read-line pipe))))
(close-pipe pipe)
num))
(define (git-clean?)
(let* ((pipe (open-input-pipe "git status -suno 2>/dev/null"))
(clean? (eof-object? (read-delimited "" pipe))))
(close-pipe pipe)
clean?))
(define (git-last-update)
(let* ((pipe (open-input-pipe
"git log -1 --format=%ar @{u} 2>/dev/null"))
(relative-last-update (read-line pipe)))
(close-pipe pipe)
(if (eof-object? relative-last-update)
"never"
relative-last-update)))
(define (list-repositories)
(for-each
(lambda (repo)
(chdir repo)
(let ((numup (git-revs-to-push))
(numdown (git-revs-to-pull))
(clean? (git-clean?))
(lastupdate (git-last-update)))
(format #t
"~a:~15t~d to push, ~d to pull and is ~adirty. Last update: ~a\n"
(basename repo) numup numdown (if clean? "not " "") lastupdate)))
repositories))
(define (list-repository-locations)
(for-each (lambda (repo)
(display repo)
(newline))
(sort repositories string<?)))
(define option-spec
`((version (single-char #\v))
(help (single-char #\h))
(register (single-char #\r) (value #t) (predicate ,git-dir?))
(remove (single-char #\R) (value #t) (predicate ,git-dir?))
(repositories (single-char #\l))))
(define (main args)
(let* ((options (getopt-long args option-spec))
(help-wanted (option-ref options 'help #f))
(version-wanted (option-ref options 'version #f))
(registration-needed (option-ref options 'register #f))
(removal (option-ref options 'remove #f))
(list (option-ref options 'repositories #f)))
(cond (version-wanted (version))
(help-wanted (help))
(registration-needed => register-repository)
(removal => remove-repository)
(list (list-repository-locations))
(#t (list-repositories)))))
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