Update dependencies (#1521)

9 files changed, 841 insertions, 283 deletions

diff --git a/vendor/github.com/spf13/viper/.golangci.yml b/vendor/github.com/spf13/viper/.golangci.yml
index a0755ce7..4f970acb 100644
--- a/vendor/github.com/spf13/viper/.golangci.yml
+++ b/vendor/github.com/spf13/viper/.golangci.yml
@@ -1,27 +1,93 @@
+run:
+    timeout: 5m
+
 linters-settings:
+    gci:
+        local-prefixes: github.com/spf13/viper
     golint:
-        min-confidence: 0.1
+        min-confidence: 0
     goimports:
         local-prefixes: github.com/spf13/viper
 
 linters:
-    enable-all: true
-    disable:
-        - funlen
-        - maligned
+    disable-all: true
+    enable:
+        - bodyclose
+        - deadcode
+        - dogsled
+        - dupl
+        - durationcheck
+        - exhaustive
+        - exportloopref
+        - gci
+        - goconst
+        - gofmt
+        - gofumpt
+        - goimports
+        - gomoddirectives
+        - goprintffuncname
+        - govet
+        - importas
+        - ineffassign
+        - makezero
+        - misspell
+        - nakedret
+        - nilerr
+        - noctx
+        - nolintlint
+        - prealloc
+        - predeclared
+        - revive
+        - rowserrcheck
+        - sqlclosecheck
+        - staticcheck
+        - structcheck
+        - stylecheck
+        - tparallel
+        - typecheck
+        - unconvert
+        - unparam
+        - unused
+        - varcheck
+        - wastedassign
+        - whitespace
+
+        # fixme
+        # - cyclop
+        # - errcheck
+        # - errorlint
+        # - exhaustivestruct
+        # - forbidigo
+        # - forcetypeassert
+        # - gochecknoglobals
+        # - gochecknoinits
+        # - gocognit
+        # - gocritic
+        # - gocyclo
+        # - godot
+        # - gosec
+        # - gosimple
+        # - ifshort
+        # - lll
+        # - nlreturn
+        # - paralleltest
+        # - scopelint
+        # - thelper
+        # - wrapcheck
 
-        # TODO: fix me
-        - wsl
-        - gochecknoinits
-        - gosimple
-        - gochecknoglobals
-        - errcheck
-        - lll
-        - godox
-        - scopelint
-        - gocyclo
-        - gocognit
-        - gocritic
+        # unused
+        # - depguard
+        # - goheader
+        # - gomodguard
 
-service:
-    golangci-lint-version: 1.21.x
+        # don't enable:
+        # - asciicheck
+        # - funlen
+        # - godox
+        # - goerr113
+        # - gomnd
+        # - interfacer
+        # - maligned
+        # - nestif
+        # - testpackage
+        # - wsl
diff --git a/vendor/github.com/spf13/viper/Makefile b/vendor/github.com/spf13/viper/Makefile
index 1c2cab03..b0f9acf2 100644
--- a/vendor/github.com/spf13/viper/Makefile
+++ b/vendor/github.com/spf13/viper/Makefile
@@ -15,8 +15,8 @@ TEST_FORMAT = short-verbose
 endif
 
 # Dependency versions
-GOTESTSUM_VERSION = 0.4.0
-GOLANGCI_VERSION = 1.21.0
+GOTESTSUM_VERSION = 1.6.4
+GOLANGCI_VERSION = 1.40.1
 
 # Add the ability to override some variables
 # Use with care
@@ -49,7 +49,7 @@ bin/golangci-lint: bin/golangci-lint-${GOLANGCI_VERSION}
 bin/golangci-lint-${GOLANGCI_VERSION}:
 	@mkdir -p bin
 	curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | bash -s -- -b ./bin/ v${GOLANGCI_VERSION}
-	@mv bin/golangci-lint $@
+	@mv bin/golangci-lint "$@"
 
 .PHONY: lint
 lint: bin/golangci-lint ## Run linter
diff --git a/vendor/github.com/spf13/viper/README.md b/vendor/github.com/spf13/viper/README.md
index dfd8034f..82bff12e 100644
--- a/vendor/github.com/spf13/viper/README.md
+++ b/vendor/github.com/spf13/viper/README.md
@@ -1,11 +1,18 @@
+> ## Viper v2 feedback
+> Viper is heading towards v2 and we would love to hear what _**you**_ would like to see in it. Share your thoughts here: https://forms.gle/R6faU74qPRPAzchZ9
+>
+> **Thank you!**
+
 ![Viper](.github/logo.png?raw=true)
 
 [![Mentioned in Awesome Go](https://awesome.re/mentioned-badge-flat.svg)](https://github.com/avelino/awesome-go#configuration)
+[![run on repl.it](https://repl.it/badge/github/sagikazarmark/Viper-example)](https://repl.it/@sagikazarmark/Viper-example#main.go)
 
 [![GitHub Workflow Status](https://img.shields.io/github/workflow/status/spf13/viper/CI?style=flat-square)](https://github.com/spf13/viper/actions?query=workflow%3ACI)
 [![Join the chat at https://gitter.im/spf13/viper](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/spf13/viper?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 [![Go Report Card](https://goreportcard.com/badge/github.com/spf13/viper?style=flat-square)](https://goreportcard.com/report/github.com/spf13/viper)
-[![go.dev reference](https://img.shields.io/badge/go.dev-reference-007d9c?logo=go&logoColor=white&style=flat-square)](https://pkg.go.dev/mod/github.com/spf13/viper)
+![Go Version](https://img.shields.io/badge/go%20version-%3E=1.14-61CFDD.svg?style=flat-square)
+[![PkgGoDev](https://pkg.go.dev/badge/mod/github.com/spf13/viper)](https://pkg.go.dev/mod/github.com/spf13/viper)
 
 **Go configuration with fangs!**
 
@@ -24,10 +31,12 @@ Many Go projects are built using Viper including:
 
 ## Install
 
-```console
+```shell
 go get github.com/spf13/viper
 ```
 
+**Note:** Viper uses [Go Modules](https://github.com/golang/go/wiki/Modules) to manage dependencies.
+
 
 ## What is Viper?
 
@@ -245,9 +254,10 @@ using `SetEnvPrefix`, you can tell Viper to use a prefix while reading from
 the environment variables. Both `BindEnv` and `AutomaticEnv` will use this
 prefix.
 
-`BindEnv` takes one or two parameters. The first parameter is the key name, the
-second is the name of the environment variable. The name of the environment
-variable is case sensitive. If the ENV variable name is not provided, then
+`BindEnv` takes one or more parameters. The first parameter is the key name, the
+rest are the name of the environment variables to bind to this key. If more than
+one are provided, they will take precedence in the specified order. The name of
+the environment variable is case sensitive. If the ENV variable name is not provided, then
 Viper will automatically assume that the ENV variable matches the following format: prefix + "_" + the key name in ALL CAPS. When you explicitly provide the ENV variable name (the second parameter),
 it **does not** automatically add the prefix. For example if the second parameter is "id",
 Viper will look for the ENV variable "ID".
@@ -259,7 +269,7 @@ the `BindEnv` is called.
 `AutomaticEnv` is a powerful helper especially when combined with
 `SetEnvPrefix`. When called, Viper will check for an environment variable any
 time a `viper.Get` request is made. It will apply the following rules. It will
-check for a environment variable with a name matching the key uppercased and
+check for an environment variable with a name matching the key uppercased and
 prefixed with the `EnvPrefix` if set.
 
 `SetEnvKeyReplacer` allows you to use a `strings.Replacer` object to rewrite Env
@@ -582,6 +592,33 @@ the `Set()` method, …) with an immediate value, then all sub-keys of
 `datastore.metric` become undefined, they are “shadowed” by the higher-priority
 configuration level.
 
+Viper can access array indices by using numbers in the path. For example:
+
+```json
+{
+    "host": {
+        "address": "localhost",
+        "ports": [
+            5799,
+            6029
+        ]
+    },
+    "datastore": {
+        "metric": {
+            "host": "127.0.0.1",
+            "port": 3099
+        },
+        "warehouse": {
+            "host": "198.0.0.1",
+            "port": 2112
+        }
+    }
+}
+
+GetInt("host.ports.1") // returns 6029
+
+```
+
 Lastly, if there exists a key that matches the delimited key path, its value
 will be returned instead. E.g.
 
@@ -607,14 +644,15 @@ will be returned instead. E.g.
 GetString("datastore.metric.host") // returns "0.0.0.0"
 ```
 
-### Extract sub-tree
+### Extracting a sub-tree
 
-Extract sub-tree from Viper.
+When developing reusable modules, it's often useful to extract a subset of the configuration
+and pass it to a module. This way the module can be instantiated more than once, with different configurations.
 
-For example, `viper` represents:
+For example, an application might use multiple different cache stores for different purposes:
 
-```json
-app:
+```yaml
+cache:
   cache1:
     max-items: 100
     item-size: 64
@@ -623,35 +661,36 @@ app:
     item-size: 80
 ```
 
-After executing:
+We could pass the cache name to a module (eg. `NewCache("cache1")`),
+but it would require weird concatenation for accessing config keys and would be less separated from the global config.
 
-```go
-subv := viper.Sub("app.cache1")
-```
+So instead of doing that let's pass a Viper instance to the constructor that represents a subset of the configuration:
 
-`subv` represents:
+```go
+cache1Config := viper.Sub("cache.cache1")
+if cache1Config == nil { // Sub returns nil if the key cannot be found
+    panic("cache configuration not found")
+}
 
-```json
-max-items: 100
-item-size: 64
+cache1 := NewCache(cache1Config)
 ```
 
-Suppose we have:
+**Note:** Always check the return value of `Sub`. It returns `nil` if a key cannot be found.
+
+Internally, the `NewCache` function can address `max-items` and `item-size` keys directly:
 
 ```go
-func NewCache(cfg *Viper) *Cache {...}
+func NewCache(v *Viper) *Cache {
+    return &Cache{
+        MaxItems: v.GetInt("max-items"),
+        ItemSize: v.GetInt("item-size"),
+    }
+}
 ```
 
-which creates a cache based on config information formatted as `subv`.
-Now it’s easy to create these 2 caches separately as:
-
-```go
-cfg1 := viper.Sub("app.cache1")
-cache1 := NewCache(cfg1)
+The resulting code is easy to test, since it's decoupled from the main config structure,
+and easier to reuse (for the same reason).
 
-cfg2 := viper.Sub("app.cache2")
-cache2 := NewCache(cfg2)
-```
 
 ### Unmarshaling
 
@@ -792,15 +831,35 @@ y.SetDefault("ContentDir", "foobar")
 When working with multiple vipers, it is up to the user to keep track of the
 different vipers.
 
+
 ## Q & A
 
-Q: Why is it called “Viper”?
+### Why is it called “Viper”?
 
 A: Viper is designed to be a [companion](http://en.wikipedia.org/wiki/Viper_(G.I._Joe))
 to [Cobra](https://github.com/spf13/cobra). While both can operate completely
 independently, together they make a powerful pair to handle much of your
 application foundation needs.
 
-Q: Why is it called “Cobra”?
+### Why is it called “Cobra”?
+
+Is there a better name for a [commander](http://en.wikipedia.org/wiki/Cobra_Commander)?
+
+### Does Viper support case sensitive keys?
+
+**tl;dr:** No.
+
+Viper merges configuration from various sources, many of which are either case insensitive or uses different casing than the rest of the sources (eg. env vars).
+In order to provide the best experience when using multiple sources, the decision has been made to make all keys case insensitive.
+
+There has been several attempts to implement case sensitivity, but unfortunately it's not that trivial. We might take a stab at implementing it in [Viper v2](https://github.com/spf13/viper/issues/772), but despite the initial noise, it does not seem to be requested that much.
+
+You can vote for case sensitivity by filling out this feedback form: https://forms.gle/R6faU74qPRPAzchZ9
+
+### Is it safe to concurrently read and write to a viper?
+
+No, you will need to synchronize access to the viper yourself (for example by using the `sync` package). Concurrent reads and writes can cause a panic.
+
+## Troubleshooting
 
-A: Is there a better name for a [commander](http://en.wikipedia.org/wiki/Cobra_Commander)?
+See [TROUBLESHOOTING.md](TROUBLESHOOTING.md).
diff --git a/vendor/github.com/spf13/viper/TROUBLESHOOTING.md b/vendor/github.com/spf13/viper/TROUBLESHOOTING.md
new file mode 100644
index 00000000..096277af
--- /dev/null
+++ b/vendor/github.com/spf13/viper/TROUBLESHOOTING.md
@@ -0,0 +1,23 @@
+# Troubleshooting
+
+## Unmarshaling doesn't work
+
+The most common reason for this issue is improper use of struct tags (eg. `yaml` or `json`). Viper uses [github.com/mitchellh/mapstructure](https://github.com/mitchellh/mapstructure) under the hood for unmarshaling values which uses `mapstructure` tags by default. Please refer to the library's documentation for using other struct tags.
+
+## Cannot find package
+
+Viper installation seems to fail a lot lately with the following (or a similar) error:
+
+```
+cannot find package "github.com/hashicorp/hcl/tree/hcl1" in any of:
+/usr/local/Cellar/go/1.15.7_1/libexec/src/github.com/hashicorp/hcl/tree/hcl1 (from $GOROOT)
+/Users/user/go/src/github.com/hashicorp/hcl/tree/hcl1 (from $GOPATH)
+```
+
+As the error message suggests, Go tries to look up dependencies in `GOPATH` mode (as it's commonly called) from the `GOPATH`.
+Viper opted to use [Go Modules](https://github.com/golang/go/wiki/Modules) to manage its dependencies. While in many cases the two methods are interchangeable, once a dependency releases new (major) versions, `GOPATH` mode is no longer able to decide which version to use, so it'll either use one that's already present or pick a version (usually the `master` branch).
+
+The solution is easy: switch to using Go Modules.
+Please refer to the [wiki](https://github.com/golang/go/wiki/Modules) on how to do that.
+
+**tl;dr* `export GO111MODULE=on`
diff --git a/vendor/github.com/spf13/viper/go.mod b/vendor/github.com/spf13/viper/go.mod
index 7d108dcc..145e0a10 100644
--- a/vendor/github.com/spf13/viper/go.mod
+++ b/vendor/github.com/spf13/viper/go.mod
@@ -3,38 +3,19 @@ module github.com/spf13/viper
 go 1.12
 
 require (
-	github.com/bketelsen/crypt v0.0.3-0.20200106085610-5cbc8cc4026c
-	github.com/coreos/bbolt v1.3.2 // indirect
-	github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e // indirect
-	github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f // indirect
-	github.com/dgrijalva/jwt-go v3.2.0+incompatible // indirect
-	github.com/fsnotify/fsnotify v1.4.7
-	github.com/gogo/protobuf v1.2.1 // indirect
-	github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef // indirect
-	github.com/gorilla/websocket v1.4.2 // indirect
-	github.com/grpc-ecosystem/go-grpc-middleware v1.0.0 // indirect
-	github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0 // indirect
-	github.com/grpc-ecosystem/grpc-gateway v1.9.0 // indirect
+	github.com/bketelsen/crypt v0.0.4
+	github.com/fsnotify/fsnotify v1.4.9
 	github.com/hashicorp/hcl v1.0.0
-	github.com/jonboulle/clockwork v0.1.0 // indirect
-	github.com/magiconair/properties v1.8.1
-	github.com/mitchellh/mapstructure v1.1.2
-	github.com/pelletier/go-toml v1.2.0
-	github.com/prometheus/client_golang v0.9.3 // indirect
+	github.com/magiconair/properties v1.8.5
+	github.com/mitchellh/mapstructure v1.4.1
+	github.com/pelletier/go-toml v1.9.3
 	github.com/smartystreets/goconvey v1.6.4 // indirect
-	github.com/soheilhy/cmux v0.1.4 // indirect
-	github.com/spf13/afero v1.1.2
-	github.com/spf13/cast v1.3.0
-	github.com/spf13/jwalterweatherman v1.0.0
-	github.com/spf13/pflag v1.0.3
-	github.com/stretchr/testify v1.3.0
+	github.com/spf13/afero v1.6.0
+	github.com/spf13/cast v1.3.1
+	github.com/spf13/jwalterweatherman v1.1.0
+	github.com/spf13/pflag v1.0.5
+	github.com/stretchr/testify v1.7.0
 	github.com/subosito/gotenv v1.2.0
-	github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5 // indirect
-	github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2 // indirect
-	go.etcd.io/bbolt v1.3.2 // indirect
-	go.uber.org/atomic v1.4.0 // indirect
-	go.uber.org/multierr v1.1.0 // indirect
-	go.uber.org/zap v1.10.0 // indirect
-	gopkg.in/ini.v1 v1.51.0
-	gopkg.in/yaml.v2 v2.2.4
+	gopkg.in/ini.v1 v1.62.0
+	gopkg.in/yaml.v2 v2.4.0
 )
diff --git a/vendor/github.com/spf13/viper/go.sum b/vendor/github.com/spf13/viper/go.sum
index 463aa7db..27730e2a 100644
--- a/vendor/github.com/spf13/viper/go.sum
+++ b/vendor/github.com/spf13/viper/go.sum
@@ -4,102 +4,150 @@ cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSR
 cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
 cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
 cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
-cloud.google.com/go v0.46.3 h1:AVXDdKsrtX33oR9fbCMu/+c1o8Ofjq6Ku/MInaLVg5Y=
 cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
-cloud.google.com/go/bigquery v1.0.1 h1:hL+ycaJpVE9M7nLoiXb/Pn10ENE2u+oddxbD8uu0ZVU=
+cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
+cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
+cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
+cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
+cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
+cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
+cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
+cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
+cloud.google.com/go v0.72.0/go.mod h1:M+5Vjvlc2wnp6tjzE102Dw08nGShTscUx2nZMufOKPI=
+cloud.google.com/go v0.74.0/go.mod h1:VV1xSbzvo+9QJOxLDaJfTjx5e+MePCpCWwvftOeQmWk=
+cloud.google.com/go v0.78.0/go.mod h1:QjdrLG0uq+YwhjoVOLsS1t7TW8fs36kLs4XO5R5ECHg=
+cloud.google.com/go v0.79.0/go.mod h1:3bzgcEeQlzbuEAYu4mrWhKqWjmpprinYgKJLgKHnbb8=
+cloud.google.com/go v0.81.0 h1:at8Tk2zUz63cLPR0JPWm5vp77pEZmzxEQBEfRKn1VV8=
+cloud.google.com/go v0.81.0/go.mod h1:mk/AM35KwGk/Nm2YSeZbxXdrNK3KZOYHmLkOqC2V6E0=
 cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
-cloud.google.com/go/datastore v1.0.0 h1:Kt+gOPPp2LEPWp8CSfxhsM8ik9CcyE/gYu+0r+RnZvM=
+cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
+cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
+cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
+cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
+cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
 cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
 cloud.google.com/go/firestore v1.1.0 h1:9x7Bx0A9R5/M9jibeJeZWqjeVEIxYW9fZYqB9a70/bY=
 cloud.google.com/go/firestore v1.1.0/go.mod h1:ulACoGHTpvq5r8rxGJ4ddJZBZqakUQqClKRT5SZwBmk=
-cloud.google.com/go/pubsub v1.0.1 h1:W9tAK3E57P75u0XLLR82LZyw8VpAnhmyTOxW9qzmyj8=
 cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
-cloud.google.com/go/storage v1.0.0 h1:VV2nUM3wwLLGh9lSABFgZMjInyUbJeaRSE64WuAIQ+4=
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diff --git a/vendor/github.com/spf13/viper/viper.go b/vendor/github.com/spf13/viper/viper.go
index 405dc20f..60f9868b 100644
--- a/vendor/github.com/spf13/viper/viper.go
+++ b/vendor/github.com/spf13/viper/viper.go
@@ -30,6 +30,7 @@ import (
 	"os"
 	"path/filepath"
 	"reflect"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -175,6 +176,8 @@ func DecodeHook(hook mapstructure.DecodeHookFunc) DecoderConfigOption {
 //		"user": "root",
 //		"endpoint": "https://localhost"
 //	}
+//
+// Note: Vipers are not safe for concurrent Get() and Set() operations.
 type Viper struct {
 	// Delimiter that separates a list of keys
 	// used to access a nested value in one go
@@ -196,6 +199,9 @@ type Viper struct {
 	configPermissions os.FileMode
 	envPrefix         string
 
+	// Specific commands for ini parsing
+	iniLoadOptions ini.LoadOptions
+
 	automaticEnvApplied bool
 	envKeyReplacer      StringReplacer
 	allowEmptyEnv       bool
@@ -205,7 +211,7 @@ type Viper struct {
 	defaults       map[string]interface{}
 	kvstore        map[string]interface{}
 	pflags         map[string]FlagValue
-	env            map[string]string
+	env            map[string][]string
 	aliases        map[string]string
 	typeByDefValue bool
 
@@ -228,7 +234,7 @@ func New() *Viper {
 	v.defaults = make(map[string]interface{})
 	v.kvstore = make(map[string]interface{})
 	v.pflags = make(map[string]FlagValue)
-	v.env = make(map[string]string)
+	v.env = make(map[string][]string)
 	v.aliases = make(map[string]string)
 	v.typeByDefValue = false
 
@@ -341,7 +347,7 @@ func (v *Viper) WatchConfig() {
 	initWG := sync.WaitGroup{}
 	initWG.Add(1)
 	go func() {
-		watcher, err := fsnotify.NewWatcher()
+		watcher, err := newWatcher()
 		if err != nil {
 			log.Fatal(err)
 		}
@@ -409,6 +415,7 @@ func (v *Viper) WatchConfig() {
 // SetConfigFile explicitly defines the path, name and extension of the config file.
 // Viper will use this and not check any of the config paths.
 func SetConfigFile(in string) { v.SetConfigFile(in) }
+
 func (v *Viper) SetConfigFile(in string) {
 	if in != "" {
 		v.configFile = in
@@ -419,6 +426,7 @@ func (v *Viper) SetConfigFile(in string) {
 // E.g. if your prefix is "spf", the env registry will look for env
 // variables that start with "SPF_".
 func SetEnvPrefix(in string) { v.SetEnvPrefix(in) }
+
 func (v *Viper) SetEnvPrefix(in string) {
 	if in != "" {
 		v.envPrefix = in
@@ -437,6 +445,7 @@ func (v *Viper) mergeWithEnvPrefix(in string) string {
 // but empty environment variables as valid values instead of falling back.
 // For backward compatibility reasons this is false by default.
 func AllowEmptyEnv(allowEmptyEnv bool) { v.AllowEmptyEnv(allowEmptyEnv) }
+
 func (v *Viper) AllowEmptyEnv(allowEmptyEnv bool) {
 	v.allowEmptyEnv = allowEmptyEnv
 }
@@ -465,6 +474,7 @@ func (v *Viper) ConfigFileUsed() string { return v.configFile }
 // AddConfigPath adds a path for Viper to search for the config file in.
 // Can be called multiple times to define multiple search paths.
 func AddConfigPath(in string) { v.AddConfigPath(in) }
+
 func (v *Viper) AddConfigPath(in string) {
 	if in != "" {
 		absin := absPathify(in)
@@ -486,6 +496,7 @@ func (v *Viper) AddConfigPath(in string) {
 func AddRemoteProvider(provider, endpoint, path string) error {
 	return v.AddRemoteProvider(provider, endpoint, path)
 }
+
 func (v *Viper) AddRemoteProvider(provider, endpoint, path string) error {
 	if !stringInSlice(provider, SupportedRemoteProviders) {
 		return UnsupportedRemoteProviderError(provider)
@@ -577,9 +588,9 @@ func (v *Viper) searchMap(source map[string]interface{}, path []string) interfac
 	return nil
 }
 
-// searchMapWithPathPrefixes recursively searches for a value for path in source map.
+// searchIndexableWithPathPrefixes recursively searches for a value for path in source map/slice.
 //
-// While searchMap() considers each path element as a single map key, this
+// While searchMap() considers each path element as a single map key or slice index, this
 // function searches for, and prioritizes, merged path elements.
 // e.g., if in the source, "foo" is defined with a sub-key "bar", and "foo.bar"
 // is also defined, this latter value is returned for path ["foo", "bar"].
@@ -588,7 +599,7 @@ func (v *Viper) searchMap(source map[string]interface{}, path []string) interfac
 // in their keys).
 //
 // Note: This assumes that the path entries and map keys are lower cased.
-func (v *Viper) searchMapWithPathPrefixes(source map[string]interface{}, path []string) interface{} {
+func (v *Viper) searchIndexableWithPathPrefixes(source interface{}, path []string) interface{} {
 	if len(path) == 0 {
 		return source
 	}
@@ -597,28 +608,15 @@ func (v *Viper) searchMapWithPathPrefixes(source map[string]interface{}, path []
 	for i := len(path); i > 0; i-- {
 		prefixKey := strings.ToLower(strings.Join(path[0:i], v.keyDelim))
 
-		next, ok := source[prefixKey]
-		if ok {
-			// Fast path
-			if i == len(path) {
-				return next
-			}
-
-			// Nested case
-			var val interface{}
-			switch next.(type) {
-			case map[interface{}]interface{}:
-				val = v.searchMapWithPathPrefixes(cast.ToStringMap(next), path[i:])
-			case map[string]interface{}:
-				// Type assertion is safe here since it is only reached
-				// if the type of `next` is the same as the type being asserted
-				val = v.searchMapWithPathPrefixes(next.(map[string]interface{}), path[i:])
-			default:
-				// got a value but nested key expected, do nothing and look for next prefix
-			}
-			if val != nil {
-				return val
-			}
+		var val interface{}
+		switch sourceIndexable := source.(type) {
+		case []interface{}:
+			val = v.searchSliceWithPathPrefixes(sourceIndexable, prefixKey, i, path)
+		case map[string]interface{}:
+			val = v.searchMapWithPathPrefixes(sourceIndexable, prefixKey, i, path)
+		}
+		if val != nil {
+			return val
 		}
 	}
 
@@ -626,6 +624,76 @@ func (v *Viper) searchMapWithPathPrefixes(source map[string]interface{}, path []
 	return nil
 }
 
+// searchSliceWithPathPrefixes searches for a value for path in sourceSlice
+//
+// This function is part of the searchIndexableWithPathPrefixes recurring search and
+// should not be called directly from functions other than searchIndexableWithPathPrefixes.
+func (v *Viper) searchSliceWithPathPrefixes(
+	sourceSlice []interface{},
+	prefixKey string,
+	pathIndex int,
+	path []string,
+) interface{} {
+	// if the prefixKey is not a number or it is out of bounds of the slice
+	index, err := strconv.Atoi(prefixKey)
+	if err != nil || len(sourceSlice) <= index {
+		return nil
+	}
+
+	next := sourceSlice[index]
+
+	// Fast path
+	if pathIndex == len(path) {
+		return next
+	}
+
+	switch n := next.(type) {
+	case map[interface{}]interface{}:
+		return v.searchIndexableWithPathPrefixes(cast.ToStringMap(n), path[pathIndex:])
+	case map[string]interface{}, []interface{}:
+		return v.searchIndexableWithPathPrefixes(n, path[pathIndex:])
+	default:
+		// got a value but nested key expected, do nothing and look for next prefix
+	}
+
+	// not found
+	return nil
+}
+
+// searchMapWithPathPrefixes searches for a value for path in sourceMap
+//
+// This function is part of the searchIndexableWithPathPrefixes recurring search and
+// should not be called directly from functions other than searchIndexableWithPathPrefixes.
+func (v *Viper) searchMapWithPathPrefixes(
+	sourceMap map[string]interface{},
+	prefixKey string,
+	pathIndex int,
+	path []string,
+) interface{} {
+	next, ok := sourceMap[prefixKey]
+	if !ok {
+		return nil
+	}
+
+	// Fast path
+	if pathIndex == len(path) {
+		return next
+	}
+
+	// Nested case
+	switch n := next.(type) {
+	case map[interface{}]interface{}:
+		return v.searchIndexableWithPathPrefixes(cast.ToStringMap(n), path[pathIndex:])
+	case map[string]interface{}, []interface{}:
+		return v.searchIndexableWithPathPrefixes(n, path[pathIndex:])
+	default:
+		// got a value but nested key expected, do nothing and look for next prefix
+	}
+
+	// not found
+	return nil
+}
+
 // isPathShadowedInDeepMap makes sure the given path is not shadowed somewhere
 // on its path in the map.
 // e.g., if "foo.bar" has a value in the given map, it “shadows”
@@ -706,6 +774,7 @@ func (v *Viper) isPathShadowedInAutoEnv(path []string) string {
 //
 //   "a b c"
 func SetTypeByDefaultValue(enable bool) { v.SetTypeByDefaultValue(enable) }
+
 func (v *Viper) SetTypeByDefaultValue(enable bool) {
 	v.typeByDefValue = enable
 }
@@ -723,6 +792,7 @@ func GetViper() *Viper {
 //
 // Get returns an interface. For a specific value use one of the Get____ methods.
 func Get(key string) interface{} { return v.Get(key) }
+
 func (v *Viper) Get(key string) interface{} {
 	lcaseKey := strings.ToLower(key)
 	val := v.find(lcaseKey, true)
@@ -773,6 +843,7 @@ func (v *Viper) Get(key string) interface{} {
 // Sub returns new Viper instance representing a sub tree of this instance.
 // Sub is case-insensitive for a key.
 func Sub(key string) *Viper { return v.Sub(key) }
+
 func (v *Viper) Sub(key string) *Viper {
 	subv := New()
 	data := v.Get(key)
@@ -789,96 +860,112 @@ func (v *Viper) Sub(key string) *Viper {
 
 // GetString returns the value associated with the key as a string.
 func GetString(key string) string { return v.GetString(key) }
+
 func (v *Viper) GetString(key string) string {
 	return cast.ToString(v.Get(key))
 }
 
 // GetBool returns the value associated with the key as a boolean.
 func GetBool(key string) bool { return v.GetBool(key) }
+
 func (v *Viper) GetBool(key string) bool {
 	return cast.ToBool(v.Get(key))
 }
 
 // GetInt returns the value associated with the key as an integer.
 func GetInt(key string) int { return v.GetInt(key) }
+
 func (v *Viper) GetInt(key string) int {
 	return cast.ToInt(v.Get(key))
 }
 
 // GetInt32 returns the value associated with the key as an integer.
 func GetInt32(key string) int32 { return v.GetInt32(key) }
+
 func (v *Viper) GetInt32(key string) int32 {
 	return cast.ToInt32(v.Get(key))
 }
 
 // GetInt64 returns the value associated with the key as an integer.
 func GetInt64(key string) int64 { return v.GetInt64(key) }
+
 func (v *Viper) GetInt64(key string) int64 {
 	return cast.ToInt64(v.Get(key))
 }
 
 // GetUint returns the value associated with the key as an unsigned integer.
 func GetUint(key string) uint { return v.GetUint(key) }
+
 func (v *Viper) GetUint(key string) uint {
 	return cast.ToUint(v.Get(key))
 }
 
 // GetUint32 returns the value associated with the key as an unsigned integer.
 func GetUint32(key string) uint32 { return v.GetUint32(key) }
+
 func (v *Viper) GetUint32(key string) uint32 {
 	return cast.ToUint32(v.Get(key))
 }
 
 // GetUint64 returns the value associated with the key as an unsigned integer.
 func GetUint64(key string) uint64 { return v.GetUint64(key) }
+
 func (v *Viper) GetUint64(key string) uint64 {
 	return cast.ToUint64(v.Get(key))
 }
 
 // GetFloat64 returns the value associated with the key as a float64.
 func GetFloat64(key string) float64 { return v.GetFloat64(key) }
+
 func (v *Viper) GetFloat64(key string) float64 {
 	return cast.ToFloat64(v.Get(key))
 }
 
 // GetTime returns the value associated with the key as time.
 func GetTime(key string) time.Time { return v.GetTime(key) }
+
 func (v *Viper) GetTime(key string) time.Time {
 	return cast.ToTime(v.Get(key))
 }
 
 // GetDuration returns the value associated with the key as a duration.
 func GetDuration(key string) time.Duration { return v.GetDuration(key) }
+
 func (v *Viper) GetDuration(key string) time.Duration {
 	return cast.ToDuration(v.Get(key))
 }
 
 // GetIntSlice returns the value associated with the key as a slice of int values.
 func GetIntSlice(key string) []int { return v.GetIntSlice(key) }
+
 func (v *Viper) GetIntSlice(key string) []int {
 	return cast.ToIntSlice(v.Get(key))
 }
 
 // GetStringSlice returns the value associated with the key as a slice of strings.
 func GetStringSlice(key string) []string { return v.GetStringSlice(key) }
+
 func (v *Viper) GetStringSlice(key string) []string {
 	return cast.ToStringSlice(v.Get(key))
 }
 
 // GetStringMap returns the value associated with the key as a map of interfaces.
 func GetStringMap(key string) map[string]interface{} { return v.GetStringMap(key) }
+
 func (v *Viper) GetStringMap(key string) map[string]interface{} {
 	return cast.ToStringMap(v.Get(key))
 }
 
 // GetStringMapString returns the value associated with the key as a map of strings.
 func GetStringMapString(key string) map[string]string { return v.GetStringMapString(key) }
+
 func (v *Viper) GetStringMapString(key string) map[string]string {
 	return cast.ToStringMapString(v.Get(key))
 }
 
 // GetStringMapStringSlice returns the value associated with the key as a map to a slice of strings.
 func GetStringMapStringSlice(key string) map[string][]string { return v.GetStringMapStringSlice(key) }
+
 func (v *Viper) GetStringMapStringSlice(key string) map[string][]string {
 	return cast.ToStringMapStringSlice(v.Get(key))
 }
@@ -886,6 +973,7 @@ func (v *Viper) GetStringMapStringSlice(key string) map[string][]string {
 // GetSizeInBytes returns the size of the value associated with the given key
 // in bytes.
 func GetSizeInBytes(key string) uint { return v.GetSizeInBytes(key) }
+
 func (v *Viper) GetSizeInBytes(key string) uint {
 	sizeStr := cast.ToString(v.Get(key))
 	return parseSizeInBytes(sizeStr)
@@ -895,6 +983,7 @@ func (v *Viper) GetSizeInBytes(key string) uint {
 func UnmarshalKey(key string, rawVal interface{}, opts ...DecoderConfigOption) error {
 	return v.UnmarshalKey(key, rawVal, opts...)
 }
+
 func (v *Viper) UnmarshalKey(key string, rawVal interface{}, opts ...DecoderConfigOption) error {
 	return decode(v.Get(key), defaultDecoderConfig(rawVal, opts...))
 }
@@ -904,6 +993,7 @@ func (v *Viper) UnmarshalKey(key string, rawVal interface{}, opts ...DecoderConf
 func Unmarshal(rawVal interface{}, opts ...DecoderConfigOption) error {
 	return v.Unmarshal(rawVal, opts...)
 }
+
 func (v *Viper) Unmarshal(rawVal interface{}, opts ...DecoderConfigOption) error {
 	return decode(v.AllSettings(), defaultDecoderConfig(rawVal, opts...))
 }
@@ -940,6 +1030,7 @@ func decode(input interface{}, config *mapstructure.DecoderConfig) error {
 func UnmarshalExact(rawVal interface{}, opts ...DecoderConfigOption) error {
 	return v.UnmarshalExact(rawVal, opts...)
 }
+
 func (v *Viper) UnmarshalExact(rawVal interface{}, opts ...DecoderConfigOption) error {
 	config := defaultDecoderConfig(rawVal, opts...)
 	config.ErrorUnused = true
@@ -950,6 +1041,7 @@ func (v *Viper) UnmarshalExact(rawVal interface{}, opts ...DecoderConfigOption)
 // BindPFlags binds a full flag set to the configuration, using each flag's long
 // name as the config key.
 func BindPFlags(flags *pflag.FlagSet) error { return v.BindPFlags(flags) }
+
 func (v *Viper) BindPFlags(flags *pflag.FlagSet) error {
 	return v.BindFlagValues(pflagValueSet{flags})
 }
@@ -961,13 +1053,18 @@ func (v *Viper) BindPFlags(flags *pflag.FlagSet) error {
 //	 Viper.BindPFlag("port", serverCmd.Flags().Lookup("port"))
 //
 func BindPFlag(key string, flag *pflag.Flag) error { return v.BindPFlag(key, flag) }
+
 func (v *Viper) BindPFlag(key string, flag *pflag.Flag) error {
+	if flag == nil {
+		return fmt.Errorf("flag for %q is nil", key)
+	}
 	return v.BindFlagValue(key, pflagValue{flag})
 }
 
 // BindFlagValues binds a full FlagValue set to the configuration, using each flag's long
 // name as the config key.
 func BindFlagValues(flags FlagValueSet) error { return v.BindFlagValues(flags) }
+
 func (v *Viper) BindFlagValues(flags FlagValueSet) (err error) {
 	flags.VisitAll(func(flag FlagValue) {
 		if err = v.BindFlagValue(flag.Name(), flag); err != nil {
@@ -979,6 +1076,7 @@ func (v *Viper) BindFlagValues(flags FlagValueSet) (err error) {
 
 // BindFlagValue binds a specific key to a FlagValue.
 func BindFlagValue(key string, flag FlagValue) error { return v.BindFlagValue(key, flag) }
+
 func (v *Viper) BindFlagValue(key string, flag FlagValue) error {
 	if flag == nil {
 		return fmt.Errorf("flag for %q is nil", key)
@@ -990,24 +1088,24 @@ func (v *Viper) BindFlagValue(key string, flag FlagValue) error {
 // BindEnv binds a Viper key to a ENV variable.
 // ENV variables are case sensitive.
 // If only a key is provided, it will use the env key matching the key, uppercased.
+// If more arguments are provided, they will represent the env variable names that
+// should bind to this key and will be taken in the specified order.
 // EnvPrefix will be used when set when env name is not provided.
 func BindEnv(input ...string) error { return v.BindEnv(input...) }
+
 func (v *Viper) BindEnv(input ...string) error {
-	var key, envkey string
 	if len(input) == 0 {
 		return fmt.Errorf("missing key to bind to")
 	}
 
-	key = strings.ToLower(input[0])
+	key := strings.ToLower(input[0])
 
 	if len(input) == 1 {
-		envkey = v.mergeWithEnvPrefix(key)
+		v.env[key] = append(v.env[key], v.mergeWithEnvPrefix(key))
 	} else {
-		envkey = input[1]
+		v.env[key] = append(v.env[key], input[1:]...)
 	}
 
-	v.env[key] = envkey
-
 	return nil
 }
 
@@ -1086,10 +1184,12 @@ func (v *Viper) find(lcaseKey string, flagDefault bool) interface{} {
 			return nil
 		}
 	}
-	envkey, exists := v.env[lcaseKey]
+	envkeys, exists := v.env[lcaseKey]
 	if exists {
-		if val, ok := v.getEnv(envkey); ok {
-			return val
+		for _, envkey := range envkeys {
+			if val, ok := v.getEnv(envkey); ok {
+				return val
+			}
 		}
 	}
 	if nested && v.isPathShadowedInFlatMap(path, v.env) != "" {
@@ -1097,7 +1197,7 @@ func (v *Viper) find(lcaseKey string, flagDefault bool) interface{} {
 	}
 
 	// Config file next
-	val = v.searchMapWithPathPrefixes(v.config, path)
+	val = v.searchIndexableWithPathPrefixes(v.config, path)
 	if val != nil {
 		return val
 	}
@@ -1190,15 +1290,17 @@ func stringToStringConv(val string) interface{} {
 // IsSet checks to see if the key has been set in any of the data locations.
 // IsSet is case-insensitive for a key.
 func IsSet(key string) bool { return v.IsSet(key) }
+
 func (v *Viper) IsSet(key string) bool {
 	lcaseKey := strings.ToLower(key)
 	val := v.find(lcaseKey, false)
 	return val != nil
 }
 
-// AutomaticEnv has Viper check ENV variables for all.
-// keys set in config, default & flags
+// AutomaticEnv makes Viper check if environment variables match any of the existing keys
+// (config, default or flags). If matching env vars are found, they are loaded into Viper.
 func AutomaticEnv() { v.AutomaticEnv() }
+
 func (v *Viper) AutomaticEnv() {
 	v.automaticEnvApplied = true
 }
@@ -1207,6 +1309,7 @@ func (v *Viper) AutomaticEnv() {
 // Useful for mapping an environmental variable to a key that does
 // not match it.
 func SetEnvKeyReplacer(r *strings.Replacer) { v.SetEnvKeyReplacer(r) }
+
 func (v *Viper) SetEnvKeyReplacer(r *strings.Replacer) {
 	v.envKeyReplacer = r
 }
@@ -1214,6 +1317,7 @@ func (v *Viper) SetEnvKeyReplacer(r *strings.Replacer) {
 // RegisterAlias creates an alias that provides another accessor for the same key.
 // This enables one to change a name without breaking the application.
 func RegisterAlias(alias string, key string) { v.RegisterAlias(alias, key) }
+
 func (v *Viper) RegisterAlias(alias string, key string) {
 	v.registerAlias(alias, strings.ToLower(key))
 }
@@ -1261,6 +1365,7 @@ func (v *Viper) realKey(key string) string {
 
 // InConfig checks to see if the given key (or an alias) is in the config file.
 func InConfig(key string) bool { return v.InConfig(key) }
+
 func (v *Viper) InConfig(key string) bool {
 	// if the requested key is an alias, then return the proper key
 	key = v.realKey(key)
@@ -1273,6 +1378,7 @@ func (v *Viper) InConfig(key string) bool {
 // SetDefault is case-insensitive for a key.
 // Default only used when no value is provided by the user via flag, config or ENV.
 func SetDefault(key string, value interface{}) { v.SetDefault(key, value) }
+
 func (v *Viper) SetDefault(key string, value interface{}) {
 	// If alias passed in, then set the proper default
 	key = v.realKey(strings.ToLower(key))
@@ -1291,6 +1397,7 @@ func (v *Viper) SetDefault(key string, value interface{}) {
 // Will be used instead of values obtained via
 // flags, config file, ENV, default, or key/value store.
 func Set(key string, value interface{}) { v.Set(key, value) }
+
 func (v *Viper) Set(key string, value interface{}) {
 	// If alias passed in, then set the proper override
 	key = v.realKey(strings.ToLower(key))
@@ -1307,6 +1414,7 @@ func (v *Viper) Set(key string, value interface{}) {
 // ReadInConfig will discover and load the configuration file from disk
 // and key/value stores, searching in one of the defined paths.
 func ReadInConfig() error { return v.ReadInConfig() }
+
 func (v *Viper) ReadInConfig() error {
 	jww.INFO.Println("Attempting to read in config file")
 	filename, err := v.getConfigFile()
@@ -1337,6 +1445,7 @@ func (v *Viper) ReadInConfig() error {
 
 // MergeInConfig merges a new configuration with an existing config.
 func MergeInConfig() error { return v.MergeInConfig() }
+
 func (v *Viper) MergeInConfig() error {
 	jww.INFO.Println("Attempting to merge in config file")
 	filename, err := v.getConfigFile()
@@ -1359,6 +1468,7 @@ func (v *Viper) MergeInConfig() error {
 // ReadConfig will read a configuration file, setting existing keys to nil if the
 // key does not exist in the file.
 func ReadConfig(in io.Reader) error { return v.ReadConfig(in) }
+
 func (v *Viper) ReadConfig(in io.Reader) error {
 	v.config = make(map[string]interface{})
 	return v.unmarshalReader(in, v.config)
@@ -1366,6 +1476,7 @@ func (v *Viper) ReadConfig(in io.Reader) error {
 
 // MergeConfig merges a new configuration with an existing config.
 func MergeConfig(in io.Reader) error { return v.MergeConfig(in) }
+
 func (v *Viper) MergeConfig(in io.Reader) error {
 	cfg := make(map[string]interface{})
 	if err := v.unmarshalReader(in, cfg); err != nil {
@@ -1377,6 +1488,7 @@ func (v *Viper) MergeConfig(in io.Reader) error {
 // MergeConfigMap merges the configuration from the map given with an existing config.
 // Note that the map given may be modified.
 func MergeConfigMap(cfg map[string]interface{}) error { return v.MergeConfigMap(cfg) }
+
 func (v *Viper) MergeConfigMap(cfg map[string]interface{}) error {
 	if v.config == nil {
 		v.config = make(map[string]interface{})
@@ -1388,6 +1500,7 @@ func (v *Viper) MergeConfigMap(cfg map[string]interface{}) error {
 
 // WriteConfig writes the current configuration to a file.
 func WriteConfig() error { return v.WriteConfig() }
+
 func (v *Viper) WriteConfig() error {
 	filename, err := v.getConfigFile()
 	if err != nil {
@@ -1398,6 +1511,7 @@ func (v *Viper) WriteConfig() error {
 
 // SafeWriteConfig writes current configuration to file only if the file does not exist.
 func SafeWriteConfig() error { return v.SafeWriteConfig() }
+
 func (v *Viper) SafeWriteConfig() error {
 	if len(v.configPaths) < 1 {
 		return errors.New("missing configuration for 'configPath'")
@@ -1407,12 +1521,14 @@ func (v *Viper) SafeWriteConfig() error {
 
 // WriteConfigAs writes current configuration to a given filename.
 func WriteConfigAs(filename string) error { return v.WriteConfigAs(filename) }
+
 func (v *Viper) WriteConfigAs(filename string) error {
 	return v.writeConfig(filename, true)
 }
 
 // SafeWriteConfigAs writes current configuration to a given filename if it does not exist.
 func SafeWriteConfigAs(filename string) error { return v.SafeWriteConfigAs(filename) }
+
 func (v *Viper) SafeWriteConfigAs(filename string) error {
 	alreadyExists, err := afero.Exists(v.fs, filename)
 	if alreadyExists && err == nil {
@@ -1463,6 +1579,7 @@ func (v *Viper) writeConfig(filename string, force bool) error {
 func unmarshalReader(in io.Reader, c map[string]interface{}) error {
 	return v.unmarshalReader(in, c)
 }
+
 func (v *Viper) unmarshalReader(in io.Reader, c map[string]interface{}) error {
 	buf := new(bytes.Buffer)
 	buf.ReadFrom(in)
@@ -1523,7 +1640,7 @@ func (v *Viper) unmarshalReader(in io.Reader, c map[string]interface{}) error {
 		}
 
 	case "ini":
-		cfg := ini.Empty()
+		cfg := ini.Empty(v.iniLoadOptions)
 		err := cfg.Append(buf.Bytes())
 		if err != nil {
 			return ConfigParseError{err}
@@ -1631,7 +1748,7 @@ func (v *Viper) marshalWriter(f afero.File, configType string) error {
 			if sectionName == "default" {
 				sectionName = ""
 			}
-			cfg.Section(sectionName).Key(keyName).SetValue(v.Get(key).(string))
+			cfg.Section(sectionName).Key(keyName).SetValue(v.GetString(key))
 		}
 		cfg.WriteTo(f)
 	}
@@ -1658,6 +1775,14 @@ func castToMapStringInterface(
 	return tgt
 }
 
+func castMapStringSliceToMapInterface(src map[string][]string) map[string]interface{} {
+	tgt := map[string]interface{}{}
+	for k, v := range src {
+		tgt[k] = v
+	}
+	return tgt
+}
+
 func castMapStringToMapInterface(src map[string]string) map[string]interface{} {
 	tgt := map[string]interface{}{}
 	for k, v := range src {
@@ -1704,7 +1829,7 @@ func mergeMaps(
 
 		svType := reflect.TypeOf(sv)
 		tvType := reflect.TypeOf(tv)
-		if svType != tvType {
+		if tvType != nil && svType != tvType { // Allow for the target to be nil
 			jww.ERROR.Printf(
 				"svType != tvType; key=%s, st=%v, tt=%v, sv=%v, tv=%v",
 				sk, svType, tvType, sv, tv)
@@ -1737,6 +1862,7 @@ func mergeMaps(
 // ReadRemoteConfig attempts to get configuration from a remote source
 // and read it in the remote configuration registry.
 func ReadRemoteConfig() error { return v.ReadRemoteConfig() }
+
 func (v *Viper) ReadRemoteConfig() error {
 	return v.getKeyValueConfig()
 }
@@ -1759,9 +1885,13 @@ func (v *Viper) getKeyValueConfig() error {
 	for _, rp := range v.remoteProviders {
 		val, err := v.getRemoteConfig(rp)
 		if err != nil {
+			jww.ERROR.Printf("get remote config: %s", err)
+
 			continue
 		}
+
 		v.kvstore = val
+
 		return nil
 	}
 	return RemoteConfigError("No Files Found")
@@ -1818,13 +1948,14 @@ func (v *Viper) watchRemoteConfig(provider RemoteProvider) (map[string]interface
 // AllKeys returns all keys holding a value, regardless of where they are set.
 // Nested keys are returned with a v.keyDelim separator
 func AllKeys() []string { return v.AllKeys() }
+
 func (v *Viper) AllKeys() []string {
 	m := map[string]bool{}
 	// add all paths, by order of descending priority to ensure correct shadowing
 	m = v.flattenAndMergeMap(m, castMapStringToMapInterface(v.aliases), "")
 	m = v.flattenAndMergeMap(m, v.override, "")
 	m = v.mergeFlatMap(m, castMapFlagToMapInterface(v.pflags))
-	m = v.mergeFlatMap(m, castMapStringToMapInterface(v.env))
+	m = v.mergeFlatMap(m, castMapStringSliceToMapInterface(v.env))
 	m = v.flattenAndMergeMap(m, v.config, "")
 	m = v.flattenAndMergeMap(m, v.kvstore, "")
 	m = v.flattenAndMergeMap(m, v.defaults, "")
@@ -1898,6 +2029,7 @@ outer:
 
 // AllSettings merges all settings and returns them as a map[string]interface{}.
 func AllSettings() map[string]interface{} { return v.AllSettings() }
+
 func (v *Viper) AllSettings() map[string]interface{} {
 	m := map[string]interface{}{}
 	// start from the list of keys, and construct the map one value at a time
@@ -1919,6 +2051,7 @@ func (v *Viper) AllSettings() map[string]interface{} {
 
 // SetFs sets the filesystem to use to read configuration.
 func SetFs(fs afero.Fs) { v.SetFs(fs) }
+
 func (v *Viper) SetFs(fs afero.Fs) {
 	v.fs = fs
 }
@@ -1926,6 +2059,7 @@ func (v *Viper) SetFs(fs afero.Fs) {
 // SetConfigName sets name for the config file.
 // Does not include extension.
 func SetConfigName(in string) { v.SetConfigName(in) }
+
 func (v *Viper) SetConfigName(in string) {
 	if in != "" {
 		v.configName = in
@@ -1936,6 +2070,7 @@ func (v *Viper) SetConfigName(in string) {
 // SetConfigType sets the type of the configuration returned by the
 // remote source, e.g. "json".
 func SetConfigType(in string) { v.SetConfigType(in) }
+
 func (v *Viper) SetConfigType(in string) {
 	if in != "" {
 		v.configType = in
@@ -1944,10 +2079,18 @@ func (v *Viper) SetConfigType(in string) {
 
 // SetConfigPermissions sets the permissions for the config file.
 func SetConfigPermissions(perm os.FileMode) { v.SetConfigPermissions(perm) }
+
 func (v *Viper) SetConfigPermissions(perm os.FileMode) {
 	v.configPermissions = perm.Perm()
 }
 
+// IniLoadOptions sets the load options for ini parsing.
+func IniLoadOptions(in ini.LoadOptions) Option {
+	return optionFunc(func(v *Viper) {
+		v.iniLoadOptions = in
+	})
+}
+
 func (v *Viper) getConfigType() string {
 	if v.configType != "" {
 		return v.configType
@@ -2014,6 +2157,7 @@ func (v *Viper) findConfigFile() (string, error) {
 // Debug prints all configuration registries for debugging
 // purposes.
 func Debug() { v.Debug() }
+
 func (v *Viper) Debug() {
 	fmt.Printf("Aliases:\n%#v\n", v.aliases)
 	fmt.Printf("Override:\n%#v\n", v.override)
diff --git a/vendor/github.com/spf13/viper/watch.go b/vendor/github.com/spf13/viper/watch.go
new file mode 100644
index 00000000..c433a8fa
--- /dev/null
+++ b/vendor/github.com/spf13/viper/watch.go
@@ -0,0 +1,11 @@
+// +build !js
+
+package viper
+
+import "github.com/fsnotify/fsnotify"
+
+type watcher = fsnotify.Watcher
+
+func newWatcher() (*watcher, error) {
+	return fsnotify.NewWatcher()
+}
diff --git a/vendor/github.com/spf13/viper/watch_wasm.go b/vendor/github.com/spf13/viper/watch_wasm.go
new file mode 100644
index 00000000..8e47e6a9
--- /dev/null
+++ b/vendor/github.com/spf13/viper/watch_wasm.go
@@ -0,0 +1,30 @@
+// +build js,wasm
+
+package viper
+
+import (
+	"errors"
+
+	"github.com/fsnotify/fsnotify"
+)
+
+type watcher struct {
+	Events chan fsnotify.Event
+	Errors chan error
+}
+
+func (*watcher) Close() error {
+	return nil
+}
+
+func (*watcher) Add(name string) error {
+	return nil
+}
+
+func (*watcher) Remove(name string) error {
+	return nil
+}
+
+func newWatcher() (*watcher, error) {
+	return &watcher{}, errors.New("fsnotify is not supported on WASM")
+}