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cmd/dist: add doc comments to some functions

I keep having to reconstruct how dist test's command system works.
This CL documents the main functions to help with this.

Change-Id: Ic1102496d3c7f356e73f3fa2ea76498251f525d4
Reviewed-on: https://go-review.googlesource.com/c/go/+/448799
Run-TryBot: Austin Clements <austin@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
This commit is contained in:
Austin Clements 2022-10-13 10:54:11 -04:00
parent 8c17505da7
commit 9c40230517

View File

@ -921,6 +921,9 @@ func (t *tester) registerSeqTest(name, dirBanner string, cmdline ...interface{})
t.registerTest1(true, name, dirBanner, cmdline...) t.registerTest1(true, name, dirBanner, cmdline...)
} }
// bgDirCmd constructs a Cmd intended to be run in the background as
// part of the worklist. The worklist runner will buffer its output
// and replay it sequentially. The command will be run in dir.
func (t *tester) bgDirCmd(dir, bin string, args ...string) *exec.Cmd { func (t *tester) bgDirCmd(dir, bin string, args ...string) *exec.Cmd {
cmd := exec.Command(bin, args...) cmd := exec.Command(bin, args...)
if filepath.IsAbs(dir) { if filepath.IsAbs(dir) {
@ -931,6 +934,9 @@ func (t *tester) bgDirCmd(dir, bin string, args ...string) *exec.Cmd {
return cmd return cmd
} }
// dirCmd constructs a Cmd intended to be run in the foreground.
// The command will be run in dir, and Stdout and Stderr will go to os.Stdout
// and os.Stderr.
func (t *tester) dirCmd(dir string, cmdline ...interface{}) *exec.Cmd { func (t *tester) dirCmd(dir string, cmdline ...interface{}) *exec.Cmd {
bin, args := flattenCmdline(cmdline) bin, args := flattenCmdline(cmdline)
cmd := t.bgDirCmd(dir, bin, args...) cmd := t.bgDirCmd(dir, bin, args...)
@ -990,6 +996,9 @@ func flattenCmdline(cmdline []interface{}) (bin string, args []string) {
return bin, list[1:] return bin, list[1:]
} }
// addCmd adds a command to the worklist. Commands can be run in
// parallel, but their output will be buffered and replayed in the
// order they were added to worklist.
func (t *tester) addCmd(dt *distTest, dir string, cmdline ...interface{}) *exec.Cmd { func (t *tester) addCmd(dt *distTest, dir string, cmdline ...interface{}) *exec.Cmd {
bin, args := flattenCmdline(cmdline) bin, args := flattenCmdline(cmdline)
w := &work{ w := &work{