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This change adds the outline of the implementation of the workspace mode.
The go command will now locate go.work files, and read them to determine
which modules are in the workspace. It will then put those modules in
the root of the workspace when building the build list. It supports
building, running, testing, and listing in workspaces. There are still
many TODOs for undone work and other changes to fix certain cases. Some
of these undone parts include: replaces and go.work.sum files, as well
as go mod {test,why,verify}, excludes in workspaces, updating work files
to include module names in comments and setting the GOWORK variable.
For #45713
Change-Id: I72716af7a300a2896087fc8a79c04e951d248278
Reviewed-on: https://go-review.googlesource.com/c/go/+/334934
Trust: Michael Matloob <matloob@golang.org>
Run-TryBot: Michael Matloob <matloob@golang.org>
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For #46366
Change-Id: I8417e6e4dbb8cb56ff7afc16893a01b7bb938217
Reviewed-on: https://go-review.googlesource.com/c/go/+/329529
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
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requirements
This is intended to be a pure-refactoring change, with very little
observable change in the behavior of the 'go' command. A few error
messages have prefixes changed (by virtue of being attached to
packages or modules instead of the build list overall), and
'go list -m' (without arguments) no longer loads the complete module
graph in order to provide the name of the (local) main module.
The previous modload.buildList variable contained a flattened build
list, from which the go.mod file was reconstructed using various
heuristics and metadata cobbled together from the original go.mod
file, the package loader (which was occasionally constructed without
actually loading packages, for the sole purpose of populating
otherwise-unrelated metadata!), and the updated build list.
This change replaces that variable with a new package-level variable,
named "requirements". The new variable is structured to match the
structure of the go.mod file: it explicitly specifies the roots of the
module graph, from which the complete module graph and complete build
list can be reconstructed (and cached) on demand. Similarly, the
"direct" markings on the go.mod requirements are now stored alongside
the requirements themselves, rather than side-channeled through the
loader.
The requirements are now plumbed explicitly though the modload
package, with accesses to the package-level variable occurring only
within top-level exported functions. The structured requirements are
logically immutable, so a new copy of the requirements is constructed
whenever the requirements are changed, substantially reducing implicit
communication-by-sharing in the package.
For #36460
Updates #40775
Change-Id: I97bb0381708f9d3e42af385b5c88a7038e1f0556
Reviewed-on: https://go-review.googlesource.com/c/go/+/293689
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
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Module-related help pages now contain a brief summary and point to the
reference documentation at golang.org/ref/mod for details.
Help pages for commands like 'go get' still describe the basic usage
and summarize flags but don't provide as much background detail.
Fixes #41427
Fixes #43419
Change-Id: Icacd38e0f33c352c447cc5a496c99674493abde2
Reviewed-on: https://go-review.googlesource.com/c/go/+/282615
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Jay Conrod <jayconrod@google.com>
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As part of #42026, these helpers from io/ioutil were moved to os.
(ioutil.TempFile and TempDir became os.CreateTemp and MkdirTemp.)
Update the Go tree to use the preferred names.
As usual, code compiled with the Go 1.4 bootstrap toolchain
and code vendored from other sources is excluded.
ReadDir changes are in a separate CL, because they are not a
simple search and replace.
For #42026.
Change-Id: If318df0216d57e95ea0c4093b89f65e5b0ababb3
Reviewed-on: https://go-review.googlesource.com/c/go/+/266365
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
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The old os references are still valid, but update our code
to reflect best practices and get used to the new locations.
Code compiled with the bootstrap toolchain
(cmd/asm, cmd/dist, cmd/compile, debug/elf)
must remain Go 1.4-compatible and is excluded.
For #41190.
Change-Id: I8f9526977867c10a221e2f392f78d7dec073f1bd
Reviewed-on: https://go-review.googlesource.com/c/go/+/243907
Trust: Russ Cox <rsc@golang.org>
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Reviewed-by: Rob Pike <r@golang.org>
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This makes error reporting a bit more consistent for 'go mod'
subcommands. Most of these commands only work in module mode when a
go.mod file is present.
Setting modload.ForceUseModules reports an error when GO111MODULE=off.
Setting modload.RootMode to modload.NeedRoot reports an error when no
go.mod file is present.
Change-Id: I1daa8d2971cb8658e0c804765839d903734a412e
Reviewed-on: https://go-review.googlesource.com/c/go/+/254369
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
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Keep track of whether the -mod flag was set explicitly. When
-mod=readonly is the default, we'll want to adjust our error messages
if it's set explicitly.
Also, register the -mod, -modcacherw, and -modfile flags in functions
in internal/base instead of internal/work. 'go mod' commands that
don't load packages shouldn't depend on internal/work.
For #40728
Change-Id: I272aea9e19908ba37e151baac4ea8630e90f241f
Reviewed-on: https://go-review.googlesource.com/c/go/+/253744
Run-TryBot: Jay Conrod <jayconrod@google.com>
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With lazy loading, the “build list” can be refined as packages are loaded.
Rename functions that return the build list to more precisely describe
the set of modules returned by the call.
Also eliminate a redundant call to LoadBuildList (right before
ListModules, which itself begins with the same call).
For #36460
Change-Id: I0fc4f9dd7602e0df5e166e329ee5d516d810ca53
Reviewed-on: https://go-review.googlesource.com/c/go/+/249878
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
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This change adds context, and a span to modload.LoadBuildList and
propagates context into modload.BuildList. It's the start
of a run of CLs to add trace spans for module operations.
Updates #38714
Change-Id: I0d58dd394051526338092dc9a5ec29a9e087e4e4
Reviewed-on: https://go-review.googlesource.com/c/go/+/248325
Run-TryBot: Michael Matloob <matloob@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
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One small step to start propagating the context in
cmd/go for tracing purposes.
Updates #38714
Change-Id: Ibb6debeb9233f84d55f0e81244487355cbe7b82c
Reviewed-on: https://go-review.googlesource.com/c/go/+/237684
Run-TryBot: Michael Matloob <matloob@golang.org>
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'go mod verify' checksums one module zip at a time, which is
CPU-intensive on most modern machines with fast disks. As a result, one
can see a CPU bottleneck when running the command on, for example, a
module where 'go list -m all' lists ~440 modules:
$ /usr/bin/time go mod verify
all modules verified
11.47user 0.77system 0:09.41elapsed 130%CPU (0avgtext+0avgdata 24284maxresident)k
0inputs+0outputs (0major+4156minor)pagefaults 0swaps
Instead, verify up to GOMAXPROCS zips at once, which should line up
pretty well with the amount of processors we can use on a machine. The
results below are obtained via 'benchcmd -n 5 GoModVerify go mod verify'
on the same large module.
name old time/op new time/op delta
GoModVerify 9.35s ± 1% 3.03s ± 2% -67.60% (p=0.008 n=5+5)
name old user-time/op new user-time/op delta
GoModVerify 11.2s ± 1% 16.3s ± 3% +45.38% (p=0.008 n=5+5)
name old sys-time/op new sys-time/op delta
GoModVerify 841ms ± 9% 865ms ± 8% ~ (p=0.548 n=5+5)
name old peak-RSS-bytes new peak-RSS-bytes delta
GoModVerify 27.8MB ±13% 50.7MB ±27% +82.01% (p=0.008 n=5+5)
The peak memory usage nearly doubles, and there is some extra overhead,
but it seems clearly worth the tradeoff given that we see a ~3x speedup
on my laptop with 4 physical cores. The vast majority of developer
machines nowadays should have 2-4 cores at least.
No test or benchmark is included; one can benchmark 'go mod verify'
directly, as I did above. The existing tests also cover correctness,
including any data races via -race.
Fixes #38623.
Change-Id: I45d8154687a6f3a6a9fb0e2b13da4190f321246c
Reviewed-on: https://go-review.googlesource.com/c/go/+/229817
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
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Currently, we extract module zip files to temporary directories, then
atomically rename them into place. On Windows, this can fail with
ERROR_ACCESS_DENIED if another process (antivirus) has files open
before the rename. In CL 220978, we repeated the rename operation in a
loop over 500 ms, but this didn't solve the problem for everyone.
A better solution will extract module zip files to their permanent
locations in the cache and will keep a ".partial" marker file,
indicating when a module hasn't been fully extracted (CL 221157).
This approach is not safe if current versions of Go access the module
cache concurrently, since the module directory is detected with a
single os.Stat.
In the interim, this CL makes two changes:
1. Flaky file system operations are repeated over 2000 ms to reduce
the chance of this error occurring.
2. cmd/go will now check for .partial files created by future
versions. If a .partial file is found, it will lock the lock file,
then remove the .partial file and directory if needed.
After some time has passed and Go versions lacking this CL are no
longer supported, we can start extracting module zip files in place.
Updates #36568
Change-Id: I467ee11aa59a90b63cf0e3e761c4fec89d57d3b6
Reviewed-on: https://go-review.googlesource.com/c/go/+/221820
Run-TryBot: Jay Conrod <jayconrod@google.com>
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Reviewed-by: Michael Matloob <matloob@golang.org>
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This change deletes several internal packages, replaces imports to
them with the equivalent golang.org/x/mod packages, updates x/mod, and
re-runs 'go mod vendor'.
Packages are replaced as follows:
cmd/go/internal/modfile → golang.org/x/mod/modfile
cmd/go/internal/module → golang.org/x/mod/module
cmd/go/internal/semver → golang.org/x/mod/semver
cmd/go/internal/sumdb → golang.org/x/mod/sumdb
cmd/go/internal/dirhash → golang.org/x/mod/sumdb/dirhash
cmd/go/internal/note → golang.org/x/mod/sumdb/note
cmd/go/internal/tlog → golang.org/x/mod/sumdb/tlog
Updates #31761
Fixes #34924
Change-Id: Ie3bf677bb0be49af969f654a0214243a6547eb57
Reviewed-on: https://go-review.googlesource.com/c/go/+/202698
Run-TryBot: Jay Conrod <jayconrod@google.com>
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Also, test that 'go mod download' without arguments reports an error.
Fixes #32027
Change-Id: I873fc59fba4c78ee2b4f49f0d846ee2ac0eee4db
Reviewed-on: https://go-review.googlesource.com/c/go/+/202697
Run-TryBot: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
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The -modcacherw flag is now registered in work.AddModCommonFlags,
which is called from work.AddBuildFlags, where it was registered
before. 'go mod' subcommands register the flag by calling
work.AddModCommonFlags directly.
Also, build commands now exit with an error if -modcacherw is set
explicitly (not in GOFLAGS) in GOPATH mode.
Updates #31481
Change-Id: I461e59a51ed31b006fff4d5c57c2a866be0bbf38
Reviewed-on: https://go-review.googlesource.com/c/go/+/202563
Run-TryBot: Jay Conrod <jayconrod@google.com>
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Checks if modules are enabled in GOPATH mode for go mod [graph, verify].
Added tests for GO111MODULE=[auto, off].
Fixes: #31237
Change-Id: I91efccfa10d0b2385ec2af1ea133deaa8234ba37
Reviewed-on: https://go-review.googlesource.com/c/go/+/174697
Run-TryBot: Jay Conrod <jayconrod@google.com>
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The current "go mod" command does too many things.
The design is unclear.
It looks like "everything you might want to do with modules"
which causes people to think all module operations go through
"go mod", which is the opposite of the seamless integration we're
going for. In particular too many people think "go mod -require"
and "go get" are the same.
It does make sense to put the module-specific functionality
under "go mod", but not as flags. Instead, split "go mod" into
multiple subcommands:
go mod edit # old go mod -require ...
go mod fix # old go mod -fix
go mod graph # old go mod -graph
go mod init # old go mod -init
go mod tidy # old go mod -sync
go mod vendor # old go mod -vendor
go mod verify # old go mod -verify
Splitting out the individual commands makes both the docs
and the implementations dramatically easier to read.
It simplifies the command lines
(go mod -init -module m is now 'go mod init m')
and allows command-specific flags.
We've avoided subcommands in the go command to date, and we
should continue to avoid adding them unless it really makes
the experience significantly better. In this case, it does.
Creating subcommands required some changes in the core
command-parsing and help logic to generalize from one
level to multiple levels.
As part of having "go mod init" be a separate command,
this CL changes the failure behavior during module initialization
to be delayed until modules are actually needed.
Initialization can still happen early, but the base.Fatalf
is delayed until something needs to use modules.
This fixes a bunch of commands like 'go env' that were
unhelpfully failing with GO111MODULE=on when not in a
module directory.
Fixes #26432.
Fixes #26581.
Fixes #26596.
Fixes #26639.
Change-Id: I868db0babe8c288e8af684b29d4a5ae4825d6407
Reviewed-on: https://go-review.googlesource.com/126655
Run-TryBot: Russ Cox <rsc@golang.org>
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Over time there may exist two modules with names that differ only in case.
On systems with case-insensitive file systems, we need to make sure those
modules do not collide in the download cache.
Do this by using the new "safe encoding" for file system paths as well as
proxy paths.
Fixes #25992.
Change-Id: I717a9987a87ad5c6927d063bf30d10d9229498c9
Reviewed-on: https://go-review.googlesource.com/124379
Run-TryBot: Russ Cox <rsc@golang.org>
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This CL corresponds to CL 123361, the final manual CL in that repo,
making this the final manual sync.
All future commits will happen in this repo (the main Go repo),
and we'll update x/vgo automatically with a fixed patch+script.
Change-Id: I572243309c1809727604fd704705a23c30e85d1a
Reviewed-on: https://go-review.googlesource.com/123576
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
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