Commit graph

11 commits

Author SHA1 Message Date
Sebastiaan van Stijn
3b391d3290
replace strings.Split(N) for strings.Cut() or alternatives
Go 1.18 and up now provides a strings.Cut() which is better suited for
splitting key/value pairs (and similar constructs), and performs better:

```go
func BenchmarkSplit(b *testing.B) {
	b.ReportAllocs()
	data := []string{"12hello=world", "12hello=", "12=hello", "12hello"}
	for i := 0; i < b.N; i++ {
		for _, s := range data {
			_ = strings.SplitN(s, "=", 2)[0]
		}
	}
}

func BenchmarkCut(b *testing.B) {
	b.ReportAllocs()
	data := []string{"12hello=world", "12hello=", "12=hello", "12hello"}
	for i := 0; i < b.N; i++ {
		for _, s := range data {
			_, _, _ = strings.Cut(s, "=")
		}
	}
}
```

    BenchmarkSplit
    BenchmarkSplit-10    	 8244206	       128.0 ns/op	     128 B/op	       4 allocs/op
    BenchmarkCut
    BenchmarkCut-10      	54411998	        21.80 ns/op	       0 B/op	       0 allocs/op

While looking at occurrences of `strings.Split()`, I also updated some for alternatives,
or added some constraints;

- for cases where an specific number of items is expected, I used `strings.SplitN()`
  with a suitable limit. This prevents (theoretical) unlimited splits.
- in some cases it we were using `strings.Split()`, but _actually_ were trying to match
  a prefix; for those I replaced the code to just match (and/or strip) the prefix.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2022-11-10 22:38:12 +01:00
James Hewitt
d5b2f94c7c
Say when a config error is caused by an env var
Without this, the log message for the user indicates a problem with the
yaml file, so identifying the actual error is hard. This change fixes
the output so that the incorrect environment variable is easy to spot.

Fixes #3653

Signed-off-by: James Hewitt <james.hewitt@uk.ibm.com>
2022-07-08 17:42:19 +01:00
Rober Morales-Chaparro
4f173262e4 patch-1 - adding more info to the error message
Signed-off-by: Rober Morales-Chaparro <rober.morales@rstor.io>
Signed-off-by: Rober Morales-Chaparro <rober.morales@ebury.com>
2021-11-24 15:55:22 +01:00
Rober Morales-Chaparro
579107cf2e Improve error message in case invalid env var found
If you set an env var with non-yaml content but accidentally collides with a possible configuration env var,...

The current error is

```configuration error: error parsing /etc/docker/registry/config.yml: yaml: unmarshal errors:
  line 1: cannot unmarshal !!str `tcp://1...` into configuration.Parameters```

With this change we can see at least which is the problematic env var.

Some orchestrators such as docker-compose set env vars on top on user env vars, so debugging can be tricky if you are not passing vars, and the error is pointing you to a problably valid config file.

Signed-off-by: Rober Morales-Chaparro <rober@rstor.io>
Signed-off-by: Rober Morales-Chaparro <rober.morales@ebury.com>
2021-11-24 15:55:22 +01:00
Derek McGowan
f593b8d975
Merge pull request #2446 from legionus/docker-configuration-ptr
Fix the pointer initialization
2020-02-22 16:42:17 -08:00
Manish Tomar
da8db4666b Fix gometalint errors
Signed-off-by: Manish Tomar <manish.tomar@docker.com>
2019-02-04 16:01:04 -08:00
Gladkov Alexey
c9eba1a5bb Fix the pointer initialization
If the overwriteStruct() finds an uninitialized pointer, it tries to initialize it,
but does it incorrectly. It tries to assign a pointer to pointer, instead of pointer.

Signed-off-by: Gladkov Alexey <agladkov@redhat.com>
2017-11-14 15:32:05 +01:00
Igor Morozov
a97d7c0c15 moved Sirupsen to sirupsen on a case sensitive system
Signed-off-by: Igor Morozov <igor@adhoc05-sjc1.prod.uber.internal>
2017-06-23 20:28:48 +00:00
Aaron Lehmann
a49bf24abe More flexible environment variable overrides
Overriding configuration parameters with environment variables used to
work by walking the configuration structure and checking for a
corresponding environment variable for each item. This was very limiting
because only variables corresponding to items that already existed in
the configuration structure would be checked. For example, an
environment variable corresponding to nested maps would only be noticed
if the outer map's key already existed.

This commit changes environment variable overriding to iterate over the
environment instead. For environment variables beginning with the
REGISTRY_ prefix, it splits the rest of their names on "_", and
interprets that as a path to the variable to unmarshal into. Map keys
are created as necessary. If we encounter an empty interface partway
through following the path, it becomes an implicit
map[string]interface{}.

With the new unit tests added here, parser.go now has 89.2% test
coverage.

TestParseWithExtraneousEnvStorageParams was removed, because the limit
of one storage driver is no longer enforced while parsing environment
variables. Now, Storage.Type will panic if multiple drivers are
specified.

Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
2015-09-03 16:11:53 -07:00
Brian Bland
24155c0431 Remove dependency on BrianBland/yaml fork
Switched back to only using the go-yaml/yaml mainline repo.
Fixes #69
2015-01-16 11:36:25 -08:00
Brian Bland
f9b119974d Genericizes the yaml+environment versioned configuration parser
Registry configuration parsing uses the new parser with a single version
declaration and an environment prefix of "REGISTRY"
2014-12-17 14:22:02 -08:00