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;;; GNU Guix --- Check load average on a remote computer via SSH.
;;; Copyright © Oleg Pykhalov <go.wigust@gmail.com>
(use-modules ((guix licenses) #:prefix license:)
(gnu packages autotools)
(gnu packages bash)
(gnu packages gnupg)
(gnu packages guile)
(gnu packages package-management)
(gnu packages pkg-config)
(gnu packages ssh)
(gnu packages tls)
(guix build utils)
(guix build-system gnu)
(guix build-system python)
(guix gexp)
(guix git-download)
(guix packages)
(ice-9 popen)
(ice-9 rdelim))
(define %source-dir (dirname (current-filename)))
(define (git-output . args)
"Execute 'git ARGS ...' command and return its output without trailing
newspace."
(with-directory-excursion %source-dir
(let* ((port (apply open-pipe* OPEN_READ "git" args))
(output (read-string port)))
(close-port port)
(string-trim-right output #\newline))))
(define (current-commit)
(git-output "log" "-n" "1" "--pretty=format:%H"))
(let ((commit (current-commit)))
(package
(home-page "https://gitlab.com/wigust/guile-loadavg/")
(name "guile-loadavg")
(version (string-append "0.0.1" "-" (string-take commit 7)))
(source (local-file %source-dir
#:recursive? #t
#:select? (git-predicate %source-dir)))
(build-system gnu-build-system)
(arguments
`(#:tests? #f
#:modules ((guix build gnu-build-system)
(guix build utils)
(srfi srfi-26)
(ice-9 popen)
(ice-9 rdelim))
#:phases
(modify-phases %standard-phases
(add-after 'install 'wrap-program
(lambda* (#:key inputs outputs #:allow-other-keys)
(let* ((out (assoc-ref outputs "out"))
(guile (assoc-ref inputs "guile"))
(gcrypt (assoc-ref inputs "guile-gcrypt"))
(gnutls (assoc-ref inputs "gnutls"))
(guix (assoc-ref inputs "guix"))
(ssh (assoc-ref inputs "guile-ssh"))
(deps (list gcrypt gnutls guix ssh out))
(effective
(read-line
(open-pipe* OPEN_READ
(string-append guile "/bin/guile")
"-c" "(display (effective-version))")))
(path (string-join
(map (cut string-append <>
"/share/guile/site/"
effective)
deps)
":"))
(gopath (string-join
(map (cut string-append <>
"/lib/guile/" effective
"/site-ccache")
deps)
":")))
(wrap-program (string-append out "/bin/loadavg")
`("GUILE_LOAD_PATH" ":" prefix (,path))
`("GUILE_LOAD_COMPILED_PATH" ":" prefix (,gopath)))
#t)
(let* ((guile (assoc-ref inputs "guile"))
(effective
(read-line
(open-pipe* OPEN_READ
(string-append guile "/bin/guile")
"-c" "(display (effective-version))")))
(path (cut string-append <>
"/share/guile/site/"
effective
"/loadavg")))
(with-directory-excursion "loadavg"
(copy-file "config.scm.in" "config.scm")
(substitute* "config.scm"
(("@PACKAGE_NAME@") ,name)
(("@PACKAGE_VERSION@") ,version)
(("@PACKAGE_URL@") ,home-page))
(install-file "config.scm"
(path (assoc-ref outputs "out"))))
#t))))))
(native-inputs
`(("autoconf" ,autoconf)
("automake" ,automake)
("pkg-config" ,pkg-config)))
(inputs
`(("gnutls" ,gnutls)
("guile" ,guile-2.2)
("guile-gcrypt" ,guile-gcrypt)
("guile-ssh" ,guile-ssh)
("guix" ,guix)))
(synopsis "Guile interface to Linux loadavg")
(description
"This package provides a Guile interface to Linux loadavg")
(license license:gpl3+)))
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