* guix-jupyter-kernel.scm (pin-channels): New procedure, with code
formerly in ‘reply-execute-request’.
(handle-channel-selection): New procedure.
(reply-execute-request): Use ‘pin-channels’.
Add support for “;;guix channels” and call ‘handle-channel-selection’.
(%magic-commands): Add “channels”.
* README.org (Pinning): Document it.

* modules/guix/jupyter/magic.scm (delete-magic, magic-run?)
(magic-exec?, magic-kernel?, magic-html?, magic-get-kernel-name):
Remove.
* tests/magic.scm (magic-run, magic-exec, magic-kernel): Remove.
Remove the corresponding tests.

* guix-jupyter-kernel.scm (manifest->shtml): Add #:ready? and honor it.
(reply-for-environment): Add #:display-id and #:ready? and honor them.
Send ‘display_data’ or ‘update_display_data’ instead of using
‘reply-shtml’.
(create-environment): Define ‘display-id’ and pass it to
‘reply-for-environment’.  Add second call to ‘reply-for-environment’.
* modules/guix/jupyter/kernel.scm (call-with-build-progress-report):
Change last message from “Done!” to “Ready.”

* modules/jupyter/guile.scm (%scheme-symbol-char-set): New variable.
(symbol-at-point, bindings-with-prefix, reply-complete-request): New
procedures.
(dispatch-route): Add ‘complete_request’.
* tests/guile.scm ("complete_request"): New test.

* guix-jupyter-kernel.scm (reply-complete-request): Use
the <complete-request> and <complete-reply> types.

* modules/jupyter/messages.scm (<complete-request>, <complete-reply>):
New data types.

This avoids potential conflicts between the (guix) module and the
top-level ‘guix.scm’ file.

* guix, jupyter: Move to…
* modules: … here.
* Makefile.am (guixmoddir, jupytermoddir)
(guixgodir, jupytergodir, guixmod_DATA, jupytermod_DATA)
(mod_DATA, nodist_go_DATA, nodist_guixgo_DATA, nodist_jupytergo_DATA):
New variables.
(SOURCES): Redefine in terms of these.
(SCM_LOG_DRIVER): Use ‘pre-inst-env’.
* guile.am (nobase_mod_DATA, nobase_go_DATA, EXTRA_DIST): Remove.
(.scm.go): Adjust ‘-L’ flags.
* pre-inst-env.in (GUILE_LOAD_PATH, GUILE_LOAD_COMPILED_PATH): Add
‘/modules’.
(JUPYTER_PATH): Add $kernel_dir to the front of $JUPYTER_PATH rather
than overriding it.

* guix.scm: Remove input labels.  Rewrite ‘sed-kernel-json’ phase.

This follows current upstream recommendations.

* environment.scm: Rename to…
* guix.scm: … this.  Mention ‘guix shell’ rather than ‘guix environment’.
* Makefile.am (EXTRA_DIST): Add it.
* README.org: Update instructions to use ‘guix shell’ rather than ‘guix
environment’.
* .gitlab-ci.yml (build): Update.

This captures the output and error ports while evaluating user codes and
forwards them to Jupyter as “stream” messages.

Fixes #7.

* jupyter/guile.scm (reply-execute-request)[forward-output]
[call-with-output-capture]: New procedures.
[with-output-capture]: New macro.
Wrap ‘code->execute-reply’ in ‘with-output-capture’.
* tests/guile.scm ("execute_request, stdout/stderr"): New test.

Reported-by: George McNinch <gmcninch@gmail.com>

* tests/guile.scm (type-predicate): New procedure.
("execute_request", "execute_request, exception"): Remove
‘type-predicate’.

* jupyter/messages.scm (<stream>): New record type.

* guix-jupyter-kernel.scm (channels->shtml): Add table heading.  Use
‘td’, not ‘tc’.
(reply-channel-description): Remove introductory sentence.

* jupyter/guile.scm (%user-module): Change module name.

* guix-jupyter-kernel.scm (link/copy): Gracefully handle EPERM.

* VERSION: Bump to 0.2.2.

Fixes #4.

* guix-jupyter-kernel.scm (handle-download): Handle the case where
'url-fetch' returns a plain file.

Fixes #3.

* jupyter/kernels.scm (call-with-busy-section): New procedure.
(with-busy-section): New macro.
* guix/jupyter/proxy.scm (proxy-request-handler): Wrap HANDLER call in
'with-busy-section'.

This is a followup to bc81615c.

* guix-jupyter-kernel.scm (reply-kernel-info-request): Call 'pub-idle'
instead of 'send-message' when sending a message to IOpub.

Fixes <https://issues.guix.gnu.org/49355>.
Reported by Domagoj Stolfa <ds815@gmx.com>.

* guix-jupyter-kernel.scm (reply-kernel-info-request): Send a reply on
'kernel-iopub' too.

* jupyter/servers.scm: Fix typos in docstrings and comments.

* guix-jupyter-kernel.scm <top level>: Add 'setvbuf' calls.

* VERSION: Bump to 0.2.1.

* guix/jupyter/kernel.scm (make-container-directory): Use 'mkdtemp!' to
create temporary as /tmp/guix-jupyter.XXXXXX.  This works around a bug
preventing multiple users from using Guix-Jupyter on the same machine at
the same time.
* jupyter/kernels.scm (exec-kernel): Likewise.

* VERSION: Bump to 0.2.0.

* README.org: Tweak.

* NEWS: New file.

This fixes "make distcheck".

* Makefile.am (EXTRA_DIST): Add $(TESTS) and 'test-driver.scm'.

* configure.ac: Adjust Guile error message.

* guix-jupyter-kernel.scm (reply-execute-request): Add 'guard' clause
for 'store-protocol-error?'.

* guix-jupyter-kernel.scm (create-environment): In the case where
several kernels are provided, rename formal parameter from 'file' to
'specs'.

This fixes a bug whereby ";;guix pin" would sometimes hang in the
'close-inferior' call in 'set-proxy-state-inferior'.

* guix-jupyter-kernel.scm (set-proxy-state-inferior):
Send (primitive-exit 0) to PREVIOUS.

* jupyter/guile.scm (picture?, picture->ssvg): New procedures.
(reply-execute-request): Return SVG if RESULT matches 'picture?'.

* jupyter/kernels.scm (sxml->html-string): Rename to...
(sxml->xml-string): ... this.
(reply-shtml): Adjust accordingly.
* guix-jupyter-kernel.scm (reply-for-environment-kernel): Likewise.
* guix/jupyter/kernel.scm (build-event-reporter)
(call-with-build-progress-report): Likewise.

* jupyter/kernels.scm (sxml->html-string): New procedure.
(reply-html): Rename to...
(reply-shtml): ... this.  Expect SHTML instead of HTML and adjust
accordingly.  Adjust all callers.
* guix/jupyter/kernel.scm (sxml->html-string): Remove.
* guix-jupyter-kernel.scm (sxml->html-string): Remove.

* guix/jupyter/environment.scm (%vcs-web-views): Change URL for Savannah
commit logs.

* guix-jupyter-kernel.scm (reply-execute-request): Wrap
'create-environment' calls in 'guard' and send a proper HTML reply upon
'package-not-found-error?' and 'output-not-found-error?'.
* guix/jupyter/environment.scm (&environment-error)
(&package-not-found-error, &output-not-found-error): Export accessors.