Commit Graph

1739 Commits

Author SHA1 Message Date
Christopher Baines
20c08a8a45
substitute: Rework connection error handling.
This is part of trying to reduce the interdependency of code within the
substitute module.

This commit addresses some of the error handling that was performed through
open-connection-for-uri/maybe. The new approach is to use
call-with-connection-error-handling, and wrap calls to http-multiple-get and
http-fetch with that procedure, which takes care of handling connection
errors.

I think this is even slightly more rigerous than the previous setup, because
this approach handles connection errors that occur when http-multiple-get
reconnects to a host.

* guix/scripts/substitute.scm (open-connection-for-uri/maybe): Transform in to
call-with-connection-error-handling.
(fetch-narinfos): Use call-with-connection-error-handling.
(process-query): Replace open-connection-for-uri/maybe with
open-connection-for-uri/cached.
(open-connection-for-uri/cached): Set a default timeout, matching the
behaviour in open-connection-for-uri/maybe.
(process-substitution): Use call-with-connection-error-handling.
2021-02-22 20:43:12 +00:00
Christopher Baines
187e970968
substitute: Remove fetch-narinfos use open-connection-for-uri/maybe.
At least by default.  Instead, make the open-connection procedure a parameter,
and make the default guix:open-connection-for-uri.  Do so similarly for
lookup-narinfos and lookup-narinfos/diverse which work towards calling
fetch-narinfos.

This means this code can be moved to a different module, without having
use/move the connection caching code.

* guix/scripts/substitute.scm (fetch-narinfos): Add #:open-connection
argument, and call http-multiple-get with it.
(lookup-narinfos) Add #:open-connection argument, and call fetch-narinfos with
it.
(lookup-narinfos/diverse): Add #:open-connection argument, and call
lookup-narinfos with it.
(process-query): Call lookup-narinfos/diverse with #:open-connection
open-connection-for-uri/maybe.
2021-02-22 20:43:12 +00:00
Christopher Baines
8116cc6673
substitute: Inline fetch in to process-substitutes.
As it's only called in one place, and this should make the code easier to
read.

* guix/scripts/substitute.scm (fetch): Move procedure inside…
(process-substitution): …here.
2021-02-22 20:43:11 +00:00
Christopher Baines
b9d058e3f7
substitute: Remove redundant fetch arguments.
It's just called in one place, with hardcoded argument values, so just inline
them.

* guix/scripts/substitute.scm (fetch): Remove arguments that don't vary, copy
the values from the call site in process-substitution.
(process-substitution): Remove unnecessary argument values from fetch call.
2021-02-22 20:43:11 +00:00
Christopher Baines
7c85877fdf
substitute: Remove now redundant connection caching helpers.
Failures now should be handled where they occur, and if there's a problem
that's symptomatic of an issue with the connection, the port should be closed.

* guix/scripts/substitute.scm (call-with-cached-connection): Remove procedure.
(with-cached-connection): Remove syntax rule.
2021-02-22 20:43:11 +00:00
Christopher Baines
f50f5751ff
substitute: Change connection cache handling in process-substitution.
Just pass open-connection-for-uri/maybe to http-fetch, this removes the need
for with-cached-connection and passing the port in.

* guix/scripts/substitute.scm (fetch): Don't take a port as an argument, and
pass open-connection-for-uri/maybe to http-fetch.
(process-substitution): Don't call fetch with with-cached-connection.
2021-02-22 20:43:11 +00:00
Christopher Baines
7b812f7c84
substitute: Stop using call-with-cached-connection in fetch-narinfos.
Instead, just pass open-connection-for-uri/maybe to http-multiple-get. This
code should be functionaly similar to the previous code. The eventual aim of
this is to make the connection caching not mandatory in fetch-narinfos.

* guix/scripts/substitute.scm (fetch-narinfos): Remove use of
call-with-cached-connection.
2021-02-22 20:43:10 +00:00
Christopher Baines
f50b501a74
substitute: open-connection-for-uri/maybe add #:verify-certificate?.
As this is used by http-fetch and http-multiple-get when they call the
specified open connection procedure.

* guix/scripts/substitute.scm (open-connection-for-uri/maybe): Support
 #:verify-certificate?.
2021-02-22 20:43:10 +00:00
Christopher Baines
e2e853ddb0
guix: Move http-multiple-get to (guix http-client).
From (guix scripts substitute). This will make it easier to reuse this code.

* guix/scripts/substitute.scm (http-multiple-get): Remove, and move to…
* guix/http-client.scm (http-multiple-get): …here.
2021-02-22 20:43:09 +00:00
Christopher Baines
87734503a4
substitute: Remove redundant let block from fetch.
* guix/scripts/substitute.scm (fetch): Remove redundant let block.
2021-02-22 20:43:09 +00:00
Christopher Baines
08acee2f98
substitute: Remove connection handling from fetch.
http-fetch does this, so just use that code instead.

* guix/scripts/substitute.scm (fetch): Remove connection handling when the
port is closed.
2021-02-22 20:43:09 +00:00
Christopher Baines
fbd61b5d3d
substitute: Remove buffer handling from fetch.
http-fetch does this, so just set the right option.

* guix/scripts/substitute.scm (fetch): Remove buffering code, and pass
 #:buffered? to http-fetch.
2021-02-22 20:43:09 +00:00
Mathieu Othacehe
6e8cdf1d26
scripts: system: Accept <image> records as input.
* guix/scripts/system.scm (system-derivation-for-action): Replace "os"
argument by "image". Remove "image-size", "image-type", "label" and
"volatile-root?"  arguments.
(perform-action): Ditto.
(process-action): Construct the <image> record and pass it to "perform-action"
procedure.
* tests/guix-system.sh: Adapt accordingly.
* gnu/system/images/hurd.scm: Return the default image.
* gnu/system/images/novena.scm: Ditto.
* gnu/system/images/pine64.scm: Ditto.
* gnu/system/images/pinebook-pro.scm Ditto.
2021-02-17 10:57:02 +01:00
Mathieu Othacehe
ee2a5da80a
scripts: system: Remove 'vm-image' command.
Remove the 'vm-image' command that has been superseded by the 'image'
command.

* gnu/system/vm.scm (system-qemu-image): Remove it.
* guix/scripts/system.scm (system-derivation-for-action): Mark 'vm-image'
command as deprecated and use the image API to produce the VM image.
(perform-action, show-help): Adapt accordingly.
* tests/guix-system.sh: Ditto.
* doc/guix.texi (Invoking guix system,
Running Guix in a VM): Ditto.
* etc/completion/fish/guix.fish: Ditto.
* etc/completion/zsh/_guix: Ditto.
2021-02-17 10:52:28 +01:00
宋文武
5207c5eb55
pull: Create the "${XDG_CONFIG_HOME}/guix" directory when needed.
This fixes <https://bugs.gnu.org/46269>.

* guix/scripts/pull.scm (ensure-default-profile): Add a 'mkdir-p' call before
'symlink'.
2021-02-12 20:54:33 +08:00
Lars-Dominik Braun
a643deac2d
environment: Allow starting from existing profile.
* guix/scripts/environment.scm (%options): Add -p/--profile switch.
(show-help): Document new switch.
(guix-environment): Handle new 'profile switch.

Signed-off-by: 宋文武 <iyzsong@member.fsf.org>
2021-02-11 17:59:07 +08:00
Ludovic Courtès
fada92bb80
guix describe: 'display-profile-content' checks the right generation.
Fixes a regression introduced in
316fc2acbb, whereby 'guix pull -l' would
always display channel information corresponding to the latest profile
generation.

Reported by Vagrant Cascadian.

* guix/scripts/describe.scm (profile-generation-channels): New
procedure.
(display-profile-content): Change default value of 'channels'.
2021-02-05 23:15:36 +01:00
Ludovic Courtès
316fc2acbb
channels: Record 'guix' channel metadata in (guix config).
Partially fixes <https://bugs.gnu.org/45896>.

* guix/config.scm.in (%channel-metadata): New variable.
* guix/describe.scm (channel-metadata): Use it.
(current-channels): New procedure.
(current-profile-entries): Clarify docstring.
* guix/self.scm (compiled-guix): Add #:channel-metadata and pass it to
'make-config.scm'.
(make-config.scm): Add #:channel-metadata and define '%channel-metadata'
in the generated file.
(guix-derivation): Add #:channel-metadata and pass it to 'compiled-guix'.
* guix/channels.scm (build-from-source): Replace 'name', 'source', and
'commit' parameters with 'instance'.  Pass #:channel-metadata to BUILD.
(build-channel-instance): Adjust accordingly.
* build-aux/build-self.scm (build-program): Add #:channel-metadata
and pass it to 'guix-derivation'.
(build): Add #:channel-metadata and pass it to 'build-program'.
* guix/scripts/describe.scm (display-profile-info): Add optional
'channels' parameter.  Pass it to 'display-profile-content'.
(display-profile-content): Add optional 'channels' parameter and honor
it.  Iterate on CHANNELS rather than on the manifest entries of
PROFILE.
(guix-describe): When PROFILE is #f, call 'current-channels' and pass it
to 'display-profile-info', unless it returns the empty list.
2021-02-04 09:23:39 +01:00
Ludovic Courtès
aedbc5ff32
guix package: Add '--export-channels'.
* guix/channels.scm (sexp->channel): Export.
* guix/describe.scm: Use (guix channels).
(manifest-entry-provenance): New procedure.
* guix/scripts/package.scm (channel=?, export-channels): New
procedures.
(show-help, %options): Add '--export-channels'.
(process-query): Honor it.
* build-aux/build-self.scm (build-program)[select?]: Exclude (guix
channels) to account for the (guix describe) change above.
* doc/guix.texi (Invoking guix package): Document it.
2021-02-01 17:32:35 +01:00
Ludovic Courtès
60d72f5364
channels: Add 'channel->code'.
* guix/channels.scm (channel->code): New procedure, taken from...
* guix/scripts/describe.scm (channel->sexp): ... here.
Adjust callers accordingly.
2021-02-01 17:32:35 +01:00
Ludovic Courtès
1b88b7bad2
guix describe: Use 'manifest-entry-channel'.
* guix/channels.scm (manifest-entry-channel): Export.
* guix/scripts/describe.scm (display-profile-content): Use it.
2021-02-01 17:32:35 +01:00
Ludovic Courtès
9fd7b050e2
guix package: Add '--export-manifest'.
* guix/scripts/package.scm (export-manifest): New procedure.
(show-help, %options): Add '--export-manifest'.
(process-query): Honor it.
* guix/build/profiles.scm (build-profile): Mention it.
* tests/guix-package.sh: Test it.
* doc/guix.texi (Invoking guix package): Document it.
2021-02-01 17:32:35 +01:00
zimoun
60947257ae
scripts: import: json: Fix error handling.
Fixes partially <https://bugs.gnu.org/44115>.

* guix/scripts/import/json.scm (guix-import-json): Handle error.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>
2021-01-31 21:49:59 +01:00
Mathieu Othacehe
041a9466ea
guix: channels: Introduce "channel-with-substitutes-available".
* guix/channels.scm (find-latest-commit-with-substitutes,
channel-with-substitutes-available): New procedures.
* guix/scripts/pull.scm (guix-pull): Move "channel-list" call inside the
%current-system parameter scope.
* doc/guix.texi (Channels with substitutes): New section.
2021-01-31 18:36:42 +01:00
Ludovic Courtès
ede4a81947
guix system: Adjust 'upgrade-shepherd-services' to shepherd service change.
Fixes a regression introduced in 95f72dcd7a.

* guix/scripts/system/reconfigure.scm (upgrade-shepherd-services)[target-services]:
Add call to 'shepherd-configuration-services'.
2021-01-30 18:23:52 +01:00
Maxime Devos
95f72dcd7a
services: shepherd: Allow custom 'shepherd' package.
* gnu/services/shepherd.scm (<shepherd-configuration>): New record.
(shepherd-boot-gexp, shepherd-root-service-type): Use it.
(scm->go, shepherd-configuration-file): Allow passing custom
shepherd package.
* gnu/system.scm (operating-system-shepherd-service-names): Use the new
record.
* guix/scripts/system.scm (export-shepherd-graph): Adjust accordingly.
* doc/guix.texi (Shepherd Services). Document it.

Co-authored-by: Ludovic Courtès <ludo@gnu.org>
2021-01-30 15:36:57 +01:00
Ludovic Courtès
d4a562ba7a
Revert "substitute: Remove extra 'newline' call."
This reverts commit d5a1b0e86f.

This change turned out to be misguided; it would lead to "substitute:"
lines being printed on the client side, without anything beyond the
colon sign.
2021-01-21 00:14:38 +01:00
Tobias Geerinckx-Rice
166ccaefe8
archive: Note service type in ACL hint.
* guix/scripts/archive.scm (authorize-key): Mention guix-service-type.
2021-01-20 18:49:29 +01:00
JOULAUD François
4d79f072cc
environment: Fix '--root' option with relative file name.
The path normalization of `--root` option of `guix environment` was
buggy as it appended full argument after normalized directory. This
patch fixes it.

* guix/scripts/environment.scm (register-gc-root): Fix gc-root path
normalization.
* tests/guix-environment.sh: Add test.

Co-authored-by: Ludovic Courtès <ludo@gnu.org>
2021-01-19 17:45:38 +01:00
Mathieu Othacehe
e74baa1245
system: Rename 'disk-image' command 'image'.
* guix/scripts/system.scm (system-derivation-for-action): Rename 'disk-image'
command 'image'. Warn when using the now deprecated 'disk-image' command.
(show-help): Adapt accordingly.
(guix-system): Ditto.
* tests/guix-system.sh: Ditto.
* gnu/system/examples/bare-hurd.tmpl: Ditto.
* doc/guix.texi (Building the Installation Image,
Building the Installation Image for ARM Boards,
Invoking guix pack,
Invoking guix system): Adapt documentation.
2021-01-19 17:16:56 +01:00
Mathieu Othacehe
2f497d94e7
image: Rename "raw" image-type to "efi-raw".
* gnu/system/image.scm (raw-image-type): Rename to "efi-raw-image-type".
* guix/scripts/system.scm (%default-options): Adapt accordingly.
* doc/guix.texi: Ditto.

Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>
2021-01-17 11:04:25 +01:00
Christopher Baines
681af17460
guix: Move narinfo code from substitute script to module.
This separation between the code for dealing with narinfos from the code doing
that for a purpose should make things clearer, and better support components
other that the substitute script in using this code.

This is just moving the code around, no code should have been significantly
changed.

* guix/scripts/substitute.scm (<narinfo>): Move record type to (guix narinfo).
(fields->alist, narinfo-hash-algorithm+value, narinfo-hash->sha256,
narinfo-signature->canonical-sexp, narinfo-maker, read-narinfo,
narinfo-sha256, valid-narinfo?, write-narinfo, narinfo->string,
string->narinfo, equivalent-narinfo?, supported-compression?,
compresses-better?, narinfo-best-uri): Move procedures to (guix narinfo).
(%compression-methods): Move variable to (guix narinfo).
* guix/narinfo.scm: New file.
* Makefile.am (MODULES): Add it.
* po/guix/POTFILES.in: Add 'guix/narinfo.scm'.
2021-01-16 11:51:03 +00:00
Christopher Baines
35e0c0cf1d
substitute: Untangle skipping authentication from valid-narinfo?.
Rather than having valid-narinfo? evaluate to #t if
%allow-unauthenticated-substitutes? is set to #t, just use (const #t) for
valid-narinfo? when %allow-unauthenticated-substitutes? is set to #t.  This
will allow moving valid-narinfo? in to a (guix substitutes) module.

* guix/scripts/substitute.scm (process-query, process-substitution): Change
the authorized? argument to lookup-narinfo and lookup-narinfos/diverse based
on %allow-unauthenticated-substitutes?.
(valid-narinfo?): Remove use of %allow-unauthenticated-substitutes?.
2021-01-16 11:49:36 +00:00
Ludovic Courtès
016299d859
substitute: Add zstd support.
* guix/scripts/substitute.scm (%compression-methods): Add zstd.
(compresses-better?): "lzip" always wins.
2021-01-13 22:24:19 +01:00
Ludovic Courtès
d288a4de7d
publish: Add support for zstd compression.
* guix/scripts/publish.scm (compress-nar)[write-compressed-file]: New
procedure.
Use it for 'gzip' and 'lzip'.  Add 'zstd.
(nar-response-port, string->compression-type): Add case for 'zstd'.
* tests/publish.scm (zstd-supported?): New procedure.
("/nar/zstd/*"): New test.
* doc/guix.texi (Invoking guix publish): Document zstd compression.
(Base Services): Add cross-reference to the above node.
2021-01-13 22:24:19 +01:00
Ludovic Courtès
d5a1b0e86f
substitute: Remove extra 'newline' call.
This led to extra "substitute:" lines since commit
79c6614f58 or thereabouts.

* guix/scripts/substitute.scm (fetch-narinfos): Remove extra 'newline'
call, which can be traced back to
d3a652037e (2015).
2021-01-13 16:26:58 +01:00
Ludovic Courtès
6c3690fc57
guix system: Add '--graph-backend'.
* guix/scripts/system.scm (lookup-backend): New procedure.
(export-extension-graph, export-shepherd-graph): Add #:backend parameter
and honor it.
(show-help, %options): Add "--graph-backend".
(%default-options): Add 'graph-backend'.
(process-action): Pass #:backend to 'export-extension-graph' and
'export-shepherd-graph'.
* doc/guix.texi (Invoking guix system): Document '--graph-backend'.
2021-01-04 23:54:15 +01:00
guy fleury iteriteka
0aed31be66
environment: Remove unused modules.
* guix/scripts/environment.scm: Do not use (ice-9 format) and (ice-9
rdelim).

Signed-off-by: Ludovic Courtès <ludo@gnu.org>
2021-01-04 11:51:48 +01:00
Ludovic Courtès
9158020d78
substitute: Handle "invalid session" GnuTLS errors on reused connections.
Reported by Christopher Baines <mail@cbaines.net>
at <https://issues.guix.gnu.org/45323#2>.

* guix/scripts/substitute.scm (call-with-cached-connection): Handle
'gnutls-error and ERROR/INVALID-SESSION.
2021-01-04 11:51:48 +01:00
Ludovic Courtès
ed63b7f87e
guix hash: Honor '-H' when used alongside '-r'.
* guix/scripts/hash.scm (guix-hash): When 'recursive? is true, use
'open-hash-port' instead of 'open-sha256-port'.
* tests/guix-hash.sh: Add test for 'guix hash -r -H sha512'.
2021-01-04 11:51:48 +01:00
Ricardo Wurmus
f249af3086
import/elpa: Abort early on failure to fetch meta data.
* guix/import/elpa.scm (elpa->guix-package): Raise condition instead of
returning #FALSE.
* guix/scripts/import/elpa.scm (guix-import-elpa): Handle conditions when
importing recursively.
2020-12-31 15:50:48 +01:00
Ludovic Courtès
7624ebbae3
ssh: Use 'guix repl' instead of 'guile'.
This simplifies setup of build machines: no need to install Guile in
addition to Guix, no need to set 'GUILE_LOAD_PATH' & co., leading to
fewer failure modes.

* guix/ssh.scm (remote-run): New procedure.
(remote-daemon-channel): Use it instead of 'open-remote-pipe*'.
(store-import-channel)[import]: Remove check for module availability.
Add call to 'primitive-exit'.
Use 'remote-run' instead of 'open-remote-pipe'.
(store-export-channel)[export]: Remove check for module availability.
Add calls to 'primitive-exit'.
Use 'remote-run' instead of 'open-remote-pipe'.
(handle-import/export-channel-error): Remove 'module-error' clause.
(report-module-error): Remove.
* guix/scripts/offload.scm (assert-node-has-guix): Replace call to
'report-module-error' by 'leave'.
* doc/guix.texi (Daemon Offload Setup): Remove mention of Guile.
2020-12-23 16:03:32 +01:00
Ludovic Courtès
be5a75ebb5
substitute: Reuse connections for '--query'.
This significantly speeds up things like substituting the closure of a
.drv.  This is a followup to 5ff521452b.

* guix/scripts/substitute.scm (http-multiple-get): Add #:open-connection
and #:keep-alive? and honor them.
(open-connection-for-uri/maybe): Use 'open-connection-for-uri/cached'
instead of 'guix:open-connection-for-uri'.  Call 'http-multiple-get'
within 'call-with-cached-connection'.
(open-connection-for-uri/cached): Add #:timeout and #:verify-certificate?
and honor them.
(call-with-cached-connection): Add 'open-connection'  parameter and
honor it.
2020-12-23 16:03:32 +01:00
Nicolas Goaziou
9f813f2505
scripts: Fix typo in crate importer help message.
Fixes <https://issues.guix.gnu.org/45351>.

* guix/scripts/import/crate.scm (show-help): Fix URL.
2020-12-23 10:05:07 +01:00
Ricardo Wurmus
5f5e3873d7
import/cran: Add input style "specification".
* guix/import/cran.scm (%input-style): New parameter.
(format-inputs): Use it.
* guix/scripts/import/cran.scm (guix-import-cran): Set the %input-style
parameter.
 (%options): Add "--style" option.
* doc/guix.texi (Invoking guix import): Document it.
2020-12-22 14:18:34 +01:00
Miguel Ángel Arruga Vivas
f00e68ace0
system: Allow separated /boot and encrypted root.
* gnu/bootloader/grub.scm (grub-configuration-file): New parameter
store-crypto-devices.
[crypto-devices]: New helper function.
[builder]: Use crypto-devices.
* gnu/machine/ssh.scm (roll-back-managed-host): Use
boot-parameters-store-crypto-devices to provide its contents to the
bootloader configuration generation process.
* gnu/tests/install.scm (%encrypted-root-not-boot-os,
%encrypted-root-not-boot-os): New os declaration.
(%encrypted-root-not-boot-installation-script): New script, whose contents
were initially taken from %encrypted-root-installation-script.
(%test-encrypted-root-not-boot-os): New test.
* gnu/system.scm (define-module): Export
operating-system-bootoader-crypto-devices and
boot-parameters-store-crypto-devices.
(<boot-parameters>): Add field store-crypto-devices.
(read-boot-parameters): Parse store-crypto-devices field.
[uuid-sexp->uuid]: New helper function extracted from
device-sexp->device.
(operating-system-bootloader-crypto-devices): New function.
(operating-system-bootcfg): Use
operating-system-bootloader-crypto-devices to provide its contents to
the bootloader configuration generation process.
(operating-system-boot-parameters): Add store-crypto-devices to the
generated boot-parameters.
(operating-system-boot-parameters-file): Likewise to the file with
the serialized structure.
* guix/scripts/system.scm (reinstall-bootloader): Use
boot-parameters-store-crypto-devices to provide its contents to the
bootloader configuration generation process.
* tests/boot-parameters.scm (%default-store-crypto-devices): New
variable.
(%grub-boot-parameters, test-read-boot-parameters): Use
%default-store-crypto-devices.
(tests store-crypto-devices): New tests.
2020-12-21 18:41:11 +01:00
Mathieu Othacehe
ee94cd265e
scripts: discover: Remove previous cache file.
Partially fixes <https://issues.guix.gnu.org/45302>.

* guix/scripts/discover.scm (guix-discover): Remove previous cache files.
2020-12-20 10:56:45 +01:00
Ludovic Courtès
4f621a2b00
maint: Require Guile >= 2.2.6.
* configure.ac: For Guile 2.2, require 2.2.6 or later.
* guix/gexp.scm (define-syntax-parameter-once): Remove.
Use 'define-syntax-parameter' instead.
* guix/mnoads.scm: Likewise.
* guix/inferior.scm (proxy)[select*]: Remove.
* guix/scripts/publish.scm <top level>: Remove replacement for (@@ (web
http) read-header-line).
* guix/store/deduplication.scm (counting-wrapper-port): Remove.
(nar-sha256): Call 'port-position' on PORT to compute SIZE.
2020-12-19 23:25:01 +01:00
Ludovic Courtès
c7c7f068c1
daemon: Delegate deduplication to 'guix substitute'.
This removes the main source of latency between subsequent downloads.

* nix/libstore/build.cc (SubstitutionGoal::tryToRun): Add a
"deduplicate" key to ENV.
(SubstitutionGoal::finished): Remove call to 'optimisePath'.
* guix/scripts/substitute.scm (process-substitution)[destination-in-store?]
[dump-file/deduplicate*]: New variables.
Pass #:dump-file to 'restore-file'.
* guix/scripts/substitute.scm (guix-substitute)[deduplicate?]: New
variable.
Pass #:deduplicate? to 'process-substitution'.
* guix/serialization.scm (dump-file): Export and augment 'dump-file'.
2020-12-19 23:25:01 +01:00
Ludovic Courtès
9dfa20a22a
daemon: Let 'guix substitute' perform hash checks.
This way, the hash of the store item can be computed as it is restored,
thereby avoiding an additional file tree traversal ('hashPath' call)
later on in the daemon.  Consequently, it should reduce latency between
subsequent substitute downloads.

This is a followup to 5ff521452b.

* guix/scripts/substitute.scm (narinfo-hash-algorithm+value): New
procedure.
(process-substitution): Wrap INPUT into a hash input port, 'hashed', and
read from it.  Compare the actual and expected hashes, and print a
"hash-mismatch" status line when they differ.  When they match, print
not just "success" but also the nar hash and size.
* nix/libstore/build.cc (class SubstitutionGoal)[expectedHashStr]:
Remove.
(SubstitutionGoal::finished): Tokenize 'status'.  Parse it and handle
"success" and "hash-mismatch" accordingly.  Call 'hashPath' only when
the returned hash is not SHA256.
(SubstitutionGoal::handleChildOutput): Remove 'expectedHashStr'
handling.
* tests/substitute.scm ("substitute, invalid hash"): Rename to...
("substitute, invalid narinfo hash"): ... this.
("substitute, invalid hash"): New test.
2020-12-19 23:25:00 +01:00