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shell: By default load the local 'manifest.scm' or 'guix.scm' file.
* guix/scripts/shell.scm (parse-args): Add call to 'auto-detect-manifest'. (authorized-directory-file, authorized-shell-directory?) (find-file-in-parent-directories, auto-detect-manifest): New procedures. * tests/guix-shell.sh: Add test. * doc/guix.texi (Invoking guix shell): Document it.
This commit is contained in:
Ludovic Courtès
parent
80edb7df65
commit
746584e0ca
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@ -5621,6 +5621,20 @@ before @command{guix shell} was invoked. The next garbage collection
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(@pxref{Invoking guix gc}) may clean up packages that were installed in
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the environment and that are no longer used outside of it.
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As an added convenience, when running from a directory that contains a
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@file{manifest.scm} or a @file{guix.scm} file (in this order), possibly
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in a parent directory, @command{guix shell} automatically loads the
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file---provided the directory is listed in
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@file{~/.config/guix/shell-authorized-directories}, and only for
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interactive use:
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@example
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guix shell
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@end example
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This provides an easy way to define, share, and enter development
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environments.
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By default, the shell session or command runs in an @emph{augmented}
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environment, where the new packages are added to search path environment
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variables such as @code{PATH}. You can, instead, choose to create an
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@ -18,15 +18,20 @@
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(define-module (guix scripts shell)
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#:use-module (guix ui)
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#:use-module ((guix diagnostics) #:select (location))
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#:use-module (guix scripts environment)
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#:autoload (guix scripts build) (show-build-options-help)
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#:autoload (guix transformations) (show-transformation-options-help)
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#:use-module (guix scripts)
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#:use-module (guix packages)
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#:use-module (guix profiles)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-26)
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#:use-module (srfi srfi-37)
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#:use-module (srfi srfi-71)
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#:use-module (ice-9 match)
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#:autoload (ice-9 rdelim) (read-line)
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#:autoload (guix utils) (config-directory)
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#:export (guix-shell))
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(define (show-help)
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@ -41,6 +46,8 @@ interactive shell in that environment.\n"))
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(display (G_ "
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-f, --file=FILE create environment for the package that the code within
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FILE evaluates to"))
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(display (G_ "
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-q inhibit loading of 'guix.scm' and 'manifest.scm'"))
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(show-environment-options-help)
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(newline)
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@ -99,7 +106,10 @@ interactive shell in that environment.\n"))
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(option '(#\f "file") #t #f
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(lambda (opt name arg result)
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(alist-cons 'load (tag-package-arg result arg)
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result))))
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result)))
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(option '(#\q) #f #f
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(lambda (opt name arg result)
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(alist-cons 'explicit-loading? #t result))))
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(filter-map (lambda (opt)
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(and (not (any (lambda (name)
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(member name to-remove))
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@ -122,10 +132,109 @@ interactive shell in that environment.\n"))
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(let ((args command (break (cut string=? "--" <>) args)))
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(let ((opts (parse-command-line args %options (list %default-options)
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#:argument-handler handle-argument)))
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(match command
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(() opts)
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(("--") opts)
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(("--" command ...) (alist-cons 'exec command opts))))))
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(auto-detect-manifest
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(match command
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(() opts)
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(("--") opts)
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(("--" command ...) (alist-cons 'exec command opts)))))))
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(define (find-file-in-parent-directories candidates)
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"Find one of CANDIDATES in the current directory or one of its ancestors."
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(define start (getcwd))
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(define device (stat:dev (stat start)))
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(let loop ((directory start))
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(let ((stat (stat directory)))
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(and (= (stat:uid stat) (getuid))
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(= (stat:dev stat) device)
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(or (any (lambda (candidate)
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(let ((candidate (string-append directory "/" candidate)))
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(and (file-exists? candidate) candidate)))
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candidates)
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(and (not (string=? directory "/"))
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(loop (dirname directory)))))))) ;lexical ".." resolution
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(define (authorized-directory-file)
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"Return the name of the file listing directories for which 'guix shell' may
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automatically load 'guix.scm' or 'manifest.scm' files."
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(string-append (config-directory) "/shell-authorized-directories"))
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(define (authorized-shell-directory? directory)
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"Return true if DIRECTORY is among the authorized directories for automatic
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loading. The list of authorized directories is read from
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'authorized-directory-file'; each line must be either: an absolute file name,
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a hash-prefixed comment, or a blank line."
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(catch 'system-error
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(lambda ()
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(call-with-input-file (authorized-directory-file)
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(lambda (port)
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(let loop ()
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(match (read-line port)
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((? eof-object?) #f)
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((= string-trim line)
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(cond ((string-prefix? "#" line) ;comment
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(loop))
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((string-prefix? "/" line) ;absolute file name
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(or (string=? line directory)
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(loop)))
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((string-null? (string-trim-right line)) ;blank line
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(loop))
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(else ;bogus line
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(let ((loc (location (port-filename port)
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(port-line port)
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(port-column port))))
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(warning loc (G_ "ignoring invalid file name: '~a'~%")
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line))))))))))
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(const #f)))
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(define (auto-detect-manifest opts)
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"If OPTS do not specify packages or a manifest, load a \"guix.scm\" or
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\"manifest.scm\" file from the current directory or one of its ancestors.
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Return the modified OPTS."
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(define (options-contain-payload? opts)
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(match opts
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(() #f)
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((('package . _) . _) #t)
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((('load . _) . _) #t)
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((('manifest . _) . _) #t)
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((('expression . _) . _) #t)
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((_ . rest) (options-contain-payload? rest))))
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(define interactive?
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(not (assoc-ref opts 'exec)))
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(define disallow-implicit-load?
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(assoc-ref opts 'explicit-loading?))
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(if (or (not interactive?)
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disallow-implicit-load?
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(options-contain-payload? opts))
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opts
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(match (find-file-in-parent-directories '("manifest.scm" "guix.scm"))
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(#f
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(warning (G_ "no packages specified; creating an empty environment~%"))
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opts)
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(file
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(if (authorized-shell-directory? (dirname file))
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(begin
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(info (G_ "loading environment from '~a'...~%") file)
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(match (basename file)
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("guix.scm" (alist-cons 'load `(package ,file) opts))
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("manifest.scm" (alist-cons 'manifest file opts))))
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(begin
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(warning (G_ "not loading '~a' because not authorized to do so~%")
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file)
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(display-hint (format #f (G_ "To allow automatic loading of
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@file{~a} when running @command{guix shell}, you must explicitly authorize its
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directory, like so:
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@example
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echo ~a >> ~a
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@end example\n")
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file
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(dirname file)
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(authorized-directory-file)))
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opts))))))
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(define-command (guix-shell . args)
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@ -22,15 +22,55 @@
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guix shell --version
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configdir="t-guix-shell-config-$$"
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tmpdir="t-guix-shell-$$"
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trap 'rm -r "$tmpdir"' EXIT
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mkdir "$tmpdir"
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trap 'rm -r "$tmpdir" "$configdir"' EXIT
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mkdir "$tmpdir" "$configdir" "$configdir/guix"
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XDG_CONFIG_HOME="$(realpath $configdir)"
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export XDG_CONFIG_HOME
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guix shell --bootstrap --pure guile-bootstrap -- guile --version
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# '--ad-hoc' is a thing of the past.
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! guix shell --ad-hoc guile-bootstrap
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# Ignoring unauthorized files.
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cat > "$tmpdir/guix.scm" <<EOF
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This is a broken guix.scm file.
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EOF
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(cd "$tmpdir"; SHELL="$(type -P true)" guix shell --bootstrap)
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# Authorize the directory.
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echo "$(realpath "$tmpdir")" > "$configdir/guix/shell-authorized-directories"
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# Ignoring 'manifest.scm' and 'guix.scm' in non-interactive use.
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(cd "$tmpdir"; guix shell --bootstrap -- true)
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mv "$tmpdir/guix.scm" "$tmpdir/manifest.scm"
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(cd "$tmpdir"; guix shell --bootstrap -- true)
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rm "$tmpdir/manifest.scm"
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# Honoring the local 'manifest.scm' file.
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cat > "$tmpdir/manifest.scm" <<EOF
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(specifications->manifest '("guile-bootstrap"))
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EOF
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cat > "$tmpdir/fake-shell.sh" <<EOF
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#!$SHELL
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# This fake shell allows us to test interactive use.
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exec echo "\$GUIX_ENVIRONMENT"
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EOF
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chmod +x "$tmpdir/fake-shell.sh"
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profile1="$(cd "$tmpdir"; SHELL="$(realpath fake-shell.sh)" guix shell --bootstrap)"
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profile2="$(guix shell --bootstrap guile-bootstrap -- "$SHELL" -c 'echo $GUIX_ENVIRONMENT')"
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test -n "$profile1"
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test "$profile1" = "$profile2"
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rm "$tmpdir/manifest.scm"
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# Do not read manifest when passed '-q'.
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echo "Broken manifest." > "$tmpdir/manifest.scm"
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(cd "$tmpdir"; SHELL="$(realpath fake-shell.sh)" guix shell --bootstrap -q)
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rm "$tmpdir/manifest.scm"
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if guile -c '(getaddrinfo "www.gnu.org" "80" AI_NUMERICSERV)' 2> /dev/null
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then
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# Compute the build environment for the initial GNU Make.
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@ -51,4 +91,10 @@ then
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# 'make-boot0' itself must not be listed.
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! guix gc --references "$profile" | grep make-boot0
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# Honoring the local 'guix.scm' file.
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echo '(@ (guix tests) gnu-make-for-tests)' > "$tmpdir/guix.scm"
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(cd "$tmpdir"; guix shell --bootstrap --search-paths --pure > "b")
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cmp "$tmpdir/a" "$tmpdir/b"
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rm "$tmpdir/guix.scm"
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fi
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