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doc: 1.12 release notes for cmd/go

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Change-Id: I1a0bedc9fbd42e138eb68af8365115339e377856
Reviewed-on: https://go-review.googlesource.com/c/152742
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Bryan C. Mills 2018-12-05 16:33:56 -05:00
parent 9e0ec5ef59
commit 02a0827d79
1 changed files with 60 additions and 12 deletions
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doc/go1.12.html
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@ -54,6 +54,25 @@ Go 1.12 is the last release that will run on macOS 10.10 Yosemite.
Go 1.13 will require macOS 10.11 El Capitan or later.
</p>
<h3 id="windows">Windows</h3>
<p>
TODO: status of ARM32 port?
</p>
<h3 id="aix">AIX</h3>
<p>
TODO: status of AIX port?
</p>
<h3 id="hurd">Hurd</h3>
<p><!-- CL 146023 -->
<code>hurd</code> is now a recognized value for <code>GOOS</code>, reserved
for the GNU/Hurd system for use with <code>gccgo</code>.
</p>
<h2 id="tools">Tools</h2>
<h3 id="vet"><code>go tool vet</code> no longer supported</h3>
@ -79,6 +98,40 @@ Go 1.13 will require macOS 10.11 El Capitan or later.
has no effect in Go 1.12.
</p>
<h3 id="modules">Modules</h3>
<p><!-- CL 148517 -->
When <code>GO111MODULE</code> is set to <code>on</code>, the <code>go</code>
command now supports module-aware operations outside of a module directory,
provided that those operations do not need to resolve import paths relative to
the current directory or explicitly edit the <code>go.mod</code> file.
Commands such as <code>go</code> <code>get</code>,
<code>go</code> <code>list</code>, and
<code>go</code> <code>mod</code> <code>download</code> behave as if in a
module with initially-empty requirements.
In this mode, <code>go</code> <code>env</code> <code>GOMOD</code> reports
the system's null device (<code>/dev/null</code> or <code>NUL</code>).
</p>
<p><!-- CL 146382 -->
<code>go</code> commands that download and extract modules are now safe to
invoke concurrently.
The module cache (<code>GOPATH/pkg/mod</code>) must reside in a filesystem that
supports file locking.
</p>
<p><!-- CL 147282, 147281 -->
The <code>go</code> directive in a <code>go.mod</code> file now indicates the
version of the language used by the files within that module, and
<code>go</code> <code>mod</code> <code>tidy</code> sets it to the
current release (<code>go</code> <code>1.12</code>) if no existing
version is present.
If the <code>go</code> directive for a module specifies a
version <em>newer</em> than the toolchain in use, the <code>go</code> command
will attempt to build the packages regardless, and will note the mismatch only if
that build fails.
</p>
<h3 id="compiler">Compiler toolchain</h3>
<p><!-- CL 134155, 134156 -->
@ -121,6 +174,13 @@ for {
</pre>
</p>
<p><!-- CL 144340 -->
The compiler now accepts a <code>-lang</code> flag to set the Go language
version to use. For example, <code>-lang=go1.8</code> causes the compiler to
emit an error if the program uses type aliases, which were added in Go 1.9.
Language changes made before Go 1.12 are not consistently enforced.
</p>
<h3 id="godoc">Godoc</h3>
<p>
@ -146,12 +206,8 @@ for {
<!-- CL 147218: https://golang.org/cl/147218: cmd/asm: rename R18 to R18_PLATFORM on ARM64 -->
<!-- CL 116275: https://golang.org/cl/116275: cmd/compile: avoid string allocations when map key is struct or array literal -->
<!-- CL 142717: https://golang.org/cl/142717: cmd/compile: remove obsolete "safe" mode -->
<!-- CL 144340: https://golang.org/cl/144340: cmd/compile: add -lang flag to specify language version -->
<!-- CL 146058: https://golang.org/cl/146058: It is invalid to convert a nil unsafe.Pointer to uintptr and back, with arithmetic.: cmd/compile: assume unsafe pointer arithmetic generates non-nil results -->
<!-- CL 141977: https://golang.org/cl/141977: cmd/doc: add -all flag to print all documentation for package -->
<!-- CL 126656: https://golang.org/cl/126656: cmd/go: add $GOFLAGS environment variable -->
<!-- CL 147282: https://golang.org/cl/147282: cmd/go: add go mod edit -go flag -->
<!-- CL 148517: https://golang.org/cl/148517: cmd/go: enable module mode without a main module when GO111MODULE=on -->
<!-- CL 146898: https://golang.org/cl/146898: cmd/link, runtime: add initial cgo support for ppc64 -->
<!-- CL 60790: https://golang.org/cl/60790: The trace tool now supports plotting mutator utilization curves, including cross-references to the execution trace. These are useful for analyzing the impact of the garbage collector on application latency and throughput.: cmd/trace: add minimum mutator utilization (MMU) plot -->
<!-- CL 115677: https://golang.org/cl/115677: cmd/vet: check embedded field tags too -->
@ -259,14 +315,6 @@ for {
</dl><!-- fmt -->
<dl id="go/build, cmd/go"><dt><a href="/pkg/go/build, cmd/go/">go/build, cmd/go</a></dt>
<dd>
<p><!-- CL 146023 -->
TODO: <a href="https://golang.org/cl/146023">https://golang.org/cl/146023</a>: add &#34;hurd&#34; as a GOOS value
</p>
</dl><!-- go/build, cmd/go -->
<dl id="go/doc"><dt><a href="/pkg/go/doc/">go/doc</a></dt>
<dd>
<p><!-- CL 140958 -->