autogenerated_exclude: increase scanner buffer

[ernado]

Some lines can be very long, so increase scanner
buffer to mitigate this.

Fix #954

[ernado]

I've checked for resource usage regressions on kubernetes sources with cold cache and disabled unused linter.

Patch:

golangci-lint has version SNAPSHOT-888446ba556b10a4f6012227c98664ce165c2d3f built from 888446b on 2020-02-03T09:38:08Z

Command exited with non-zero status 1
	Command being timed: "/src/golangci-lint/dist/golangci-lint_linux_amd64/golangci-lint run --disable unused --timeout 1h"
	User time (seconds): 472.43
	System time (seconds): 5.38
	Percent of CPU this job got: 702%
	Elapsed (wall clock) time (h:mm:ss or m:ss): 1:08.04
	Average shared text size (kbytes): 0
	Average unshared data size (kbytes): 0
	Average stack size (kbytes): 0
	Average total size (kbytes): 0
	Maximum resident set size (kbytes): 2956784
	Average resident set size (kbytes): 0
	Major (requiring I/O) page faults: 0
	Minor (reclaiming a frame) page faults: 636892
	Voluntary context switches: 244492
	Involuntary context switches: 74899
	Swaps: 0
	File system inputs: 0
	File system outputs: 124632
	Socket messages sent: 0
	Socket messages received: 0
	Signals delivered: 0
	Page size (bytes): 4096
	Exit status: 1

v1.23.2:

golangci-lint has version 1.23.2 built from fd621bd on 2020-02-02T22:12:01Z

Command exited with non-zero status 1
	Command being timed: "/src/golangci-lint/bin/golangci-lint run --disable unused --timeout 1h"
	User time (seconds): 473.22
	System time (seconds): 5.67
	Percent of CPU this job got: 698%
	Elapsed (wall clock) time (h:mm:ss or m:ss): 1:08.54
	Average shared text size (kbytes): 0
	Average unshared data size (kbytes): 0
	Average stack size (kbytes): 0
	Average total size (kbytes): 0
	Maximum resident set size (kbytes): 3011788
	Average resident set size (kbytes): 0
	Major (requiring I/O) page faults: 0
	Minor (reclaiming a frame) page faults: 653022
	Voluntary context switches: 221368
	Involuntary context switches: 94506
	Swaps: 0
	File system inputs: 0
	File system outputs: 124648
	Socket messages sent: 0
	Socket messages received: 0
	Signals delivered: 0
	Page size (bytes): 4096
	Exit status: 1

Looks like there are no regressions.

[ernado]

I've checked it with mattermost/mattermost@1a82e3e

Before fix:

$ /src/golangci-lint/bin/golangci-lint run
WARN [runner] Can't process result by autogenerated_exclude processor: can't filter issue result.Issue{FromLinter:"golint", Text:"exported var SystemEmojis should have comment or be unexported", SourceLines:[]string(nil), Replacement:(*result.Replacement)(nil), Pkg:(*packages.Package)(0xc0016c30e0), LineRange:(*result.Range)(nil), Pos:token.Position{Filename:"model/emoji_data.go", Offset:132, Line:6, Column:5}, HunkPos:0}: failed to get doc of file model/emoji_data.go: failed to scan file: bufio.Scanner: token too long 

After fix there is no warning.

[agnivade]

Are we going to have a new patch release soon ?

[ernado]

Yes, please expect binaries for v1.23.3 within ~15min, CI/CD is already in progress.