go/src/cmd/internal/script/scripttest, branch main

cmd/go/internal/doc: use internal go command logic to load packages

2026-03-31T18:40:13Z

We've been using go/build to load packages, and that doesn't always do the right thing, because it doesn't have the same context and settings that the go command uses to load packages. Use the go command's loader to load packages. This CL doesn't remove the logic for searching for matching packages in dirs.go. A next step would be to remove that so all the matching is also done with the go command's logic. Fixes #75976 Change-Id: I3c76d9a54dc88648bb7c76a17afad8cb6a6a6964 Reviewed-on: https://go-review.googlesource.com/c/go/+/733200 LUCI-TryBot-Result: Go LUCI Reviewed-by: Sean Liao Reviewed-by: Junyang Shao Reviewed-by: Michael Matloob

cmd/internal/test2json: generate and validate test artifacts

2026-03-09T18:02:12Z

Adds a mechanism for generating test2json test artifacts from and validating them against a real test. If a .test file has a corresponding .src file, TestGolden will now treat the .src file as a script test, executing it and verifying that the output matches the contents of the .test file. Running TestGolden with the -update flag will also regenerate .test files if they have a corresponding .src file. Capturing the output of the script test in this way required making minor changes to cmd/internal/script/scripttest. This was motivated by CL 601535 (golang/go#62728). Specifically, testing that CL required adding src/cmd/internal/test2json/testdata/frameescape.test which has a multitude of non-printing characters and thus must be generated by executing `go test`. Using a script test to generate the test file is more reliable than doing it by hand. Change-Id: I60456700e37e21a42d0514be2ce86dc6df2bccb0 Reviewed-on: https://go-review.googlesource.com/c/go/+/628615 Reviewed-by: Michael Matloob LUCI-TryBot-Result: Go LUCI Reviewed-by: Michael Matloob Reviewed-by: Damien Neil Auto-Submit: Damien Neil

cmd/internal/fuzztest: move fuzz tests out of cmd/go test suite

2025-12-04T23:05:53Z

They are very slow: taking them out of the cmd/go test suite makes the go command tests go from about 80 seconds to run on my system, to about 50 seconds to run. Change-Id: I19b5c252bd2b6e6d64821cada961ddaa6a6a6964 Reviewed-on: https://go-review.googlesource.com/c/go/+/726960 Auto-Submit: Michael Matloob Reviewed-by: Alan Donovan Reviewed-by: Michael Matloob LUCI-TryBot-Result: Go LUCI

all: replace calls to errors.As with errors.AsType

2025-10-13T17:12:48Z

This change replaces most occurrences (in code as well as in comments) of errors.As with errors.AsType. It leaves the errors package and vendored code untouched. Change-Id: I3bde73f318a0b408bdb8f5a251494af15a13118a GitHub-Last-Rev: 8aaaa36a5a12d2a6a90c6d51680464e1a3115139 GitHub-Pull-Request: golang/go#75698 Reviewed-on: https://go-review.googlesource.com/c/go/+/708495 Auto-Submit: Michael Pratt LUCI-TryBot-Result: Go LUCI Reviewed-by: Alan Donovan Reviewed-by: Michael Pratt

all: replace strings.Split with strings.SplitSeq

2025-09-16T00:34:45Z

In Go 1.25+, strings.SplitSeq offers better performance. Here are the benchmark results comparing strings.Split and strings.SplitSeq in a for-loop, with the benchmark code located in src/strings/iter_test.go: goos: darwin goarch: amd64 pkg: cmd/go/internal/auth cpu: Intel(R) Core(TM) i7-8569U CPU @ 2.80GHz │ old.txt │ new.txt │ │ sec/op │ sec/op vs base │ ParseGitAuth/standard-8 281.4n ± 1% 218.0n ± 11% -22.54% (p=0.000 n=10) ParseGitAuth/with_url-8 549.1n ± 1% 480.5n ± 13% -12.48% (p=0.002 n=10) ParseGitAuth/minimal-8 235.4n ± 1% 197.3n ± 7% -16.20% (p=0.000 n=10) ParseGitAuth/complex-8 797.6n ± 2% 805.2n ± 4% ~ (p=0.481 n=10) ParseGitAuth/empty-8 87.48n ± 3% 63.25n ± 6% -27.71% (p=0.000 n=10) ParseGitAuth/malformed-8 228.8n ± 1% 171.2n ± 3% -25.17% (p=0.000 n=10) geomean 288.9n 237.7n -17.72% │ old.txt │ new.txt │ │ B/op │ B/op vs base │ ParseGitAuth/standard-8 192.00 ± 0% 96.00 ± 0% -50.00% (p=0.000 n=10) ParseGitAuth/with_url-8 400.0 ± 0% 288.0 ± 0% -28.00% (p=0.000 n=10) ParseGitAuth/minimal-8 144.00 ± 0% 80.00 ± 0% -44.44% (p=0.000 n=10) ParseGitAuth/complex-8 528.0 ± 0% 400.0 ± 0% -24.24% (p=0.000 n=10) ParseGitAuth/empty-8 32.00 ± 0% 16.00 ± 0% -50.00% (p=0.000 n=10) ParseGitAuth/malformed-8 176.00 ± 0% 80.00 ± 0% -54.55% (p=0.000 n=10) geomean 179.0 102.1 -42.96% │ old.txt │ new.txt │ │ allocs/op │ allocs/op vs base │ ParseGitAuth/standard-8 3.000 ± 0% 2.000 ± 0% -33.33% (p=0.000 n=10) ParseGitAuth/with_url-8 4.000 ± 0% 3.000 ± 0% -25.00% (p=0.000 n=10) ParseGitAuth/minimal-8 3.000 ± 0% 2.000 ± 0% -33.33% (p=0.000 n=10) ParseGitAuth/complex-8 4.000 ± 0% 3.000 ± 0% -25.00% (p=0.000 n=10) ParseGitAuth/empty-8 2.000 ± 0% 1.000 ± 0% -50.00% (p=0.000 n=10) ParseGitAuth/malformed-8 3.000 ± 0% 2.000 ± 0% -33.33% (p=0.000 n=10) geomean 3.086 2.040 -33.91% Updates #69315. Change-Id: Id0219edea45d9658d527b863162ebe917e7821d9 GitHub-Last-Rev: 392b315e122f2c9ef8703ca2dbce8f82ec198556 GitHub-Pull-Request: golang/go#75259 Reviewed-on: https://go-review.googlesource.com/c/go/+/701015 Reviewed-by: Keith Randall LUCI-TryBot-Result: Go LUCI Reviewed-by: Michael Knyszek Reviewed-by: Emmanuel Odeke Reviewed-by: Keith Randall Auto-Submit: Emmanuel Odeke

cmd/internal/script: fix copying directory when symlink fails

2025-05-14T17:10:33Z

The change fixes `linkOrCopy` to work on systems wihtout symlinks, when copying directories. This was originally noticed on Windows systems when the user did not have admin privs. Fixes #73692 Change-Id: I8ca66d65e99433ad38e70314abfabafd43794b79 Reviewed-on: https://go-review.googlesource.com/c/go/+/672275 Reviewed-by: Michael Matloob Reviewed-by: Michael Matloob LUCI-TryBot-Result: Go LUCI

cmd/internal/script/scripttest: use GOHOSTARCH to find tool directory

2025-03-12T01:16:13Z

Fixes #72800 Change-Id: Idde7eae13d1c0098e5314935cf8ca823cbc7a7cc Reviewed-on: https://go-review.googlesource.com/c/go/+/656855 Auto-Submit: Ian Lance Taylor Reviewed-by: Keith Randall Reviewed-by: Keith Randall Reviewed-by: Ian Lance Taylor LUCI-TryBot-Result: Go LUCI

all: fix some function names and typos in comment

2024-11-21T22:16:20Z

Change-Id: I07e7c8eaa5bd4bac0d576b2f2f4cd3f81b0b77a4 Reviewed-on: https://go-review.googlesource.com/c/go/+/630055 LUCI-TryBot-Result: Go LUCI Commit-Queue: Ian Lance Taylor Reviewed-by: Ian Lance Taylor Reviewed-by: Russ Cox Auto-Submit: Ian Lance Taylor

cmd: add README generation for compiler + linker script tests

2024-07-31T13:21:20Z

Add in automatic README generation and README consistency checking for the cmd/compile and cmd/link script tests. This code is adapted from the similar facility in cmd/go (e.g. scriptreadme_test.go); the README helps folks writing new tests understand the mechanics. Updates #68606. Change-Id: I8ff7ff8e814abd4385bd670440511b2c60a4cef6 Reviewed-on: https://go-review.googlesource.com/c/go/+/601756 Reviewed-by: Cherry Mui LUCI-TryBot-Result: Go LUCI

cmd/internal/script: new hook for adding in toolchain script conditions

2024-07-31T13:21:14Z

Introduce a new function AddToolChainScriptConditions that augments a default "script.Cond" set with a collection of useful conditions, including godebug/goexperiment, cgo, race support, buildmode, asan, msan, and so on. Having these conditions available makes it easier to write script tests that deal with specific build-flavor corner cases. The functions backing the new conditions are helper functions migrated over from the Go command's script test setup. Updates #68606. Change-Id: I14def1115b54dc47529c983abcd2c5ea9326b9de Reviewed-on: https://go-review.googlesource.com/c/go/+/601715 LUCI-TryBot-Result: Go LUCI Reviewed-by: Cherry Mui