fix: Preserve case in user template data

.golangci.yml

@@ -113,18 +113,19 @@ linters-settings:
     - anon
     - empty
     - error
-    - github.com/charmbracelet/bubbletea\.Model
-    - github.com/charmbracelet/bubbletea\.Msg
-    - github.com/go-git/go-git/v5/plumbing/format/diff\.File
-    - github.com/go-git/go-git/v5/plumbing/format/diff\.Patch
-    - github.com/mitchellh/mapstructure\.DecodeHookFunc
-    - github.com/twpayne/chezmoi/v2/pkg/chezmoi\.ActualStateEntry
-    - github.com/twpayne/chezmoi/v2/pkg/chezmoi\.Encryption
-    - github.com/twpayne/chezmoi/v2/pkg/chezmoi\.SourceStateOrigin
-    - github.com/twpayne/chezmoi/v2/pkg/chezmoi\.SourceStateEntry
-    - github.com/twpayne/chezmoi/v2/pkg/chezmoi\.System
-    - github.com/twpayne/chezmoi/v2/pkg/chezmoi\.TargetStateEntry
-    - github.com/twpayne/go-vfs/v4\.FS
+    - github\.com/charmbracelet/bubbletea\.Model
+    - github\.com/charmbracelet/bubbletea\.Msg
+    - github\.com/go-git/go-git/v5/plumbing/format/diff\.File
+    - github\.com/go-git/go-git/v5/plumbing/format/diff\.Patch
+    - github\.com/mitchellh/mapstructure\.DecodeHookFunc
+    - github\.com/twpayne/chezmoi/v2/pkg/chezmoi\.ActualStateEntry
+    - github\.com/twpayne/chezmoi/v2/pkg/chezmoi\.Encryption
+    - github\.com/twpayne/chezmoi/v2/pkg/chezmoi\.Format
+    - github\.com/twpayne/chezmoi/v2/pkg/chezmoi\.SourceStateOrigin
+    - github\.com/twpayne/chezmoi/v2/pkg/chezmoi\.SourceStateEntry
+    - github\.com/twpayne/chezmoi/v2/pkg/chezmoi\.System
+    - github\.com/twpayne/chezmoi/v2/pkg/chezmoi\.TargetStateEntry
+    - github\.com/twpayne/go-vfs/v4\.FS
     - stdlib
   misspell:
     locale: US

assets/chezmoi.io/docs/reference/templates/variables.md

@@ -45,8 +45,3 @@ NT\CurrentVersion`.
 Additional variables can be defined in the config file in the `data` section.
 Variable names must consist of a letter and be followed by zero or more letters
 and/or digits.
-
-!!! hint
-
-    Until [#463](https://github.com/twpayne/chezmoi/issues/463) is resolved, custom
-    data fields from the `data` section appear as all lowercase strings.

assets/chezmoi.io/docs/user-guide/frequently-asked-questions/design.md

@@ -191,13 +191,6 @@ but must meet the following criteria, in order of importance:
 4. Not add significant extra complexity to the user interface or underlying
    implementation.
 
-## Why does chezmoi convert all my template variables to lowercase?
-
-This is due to a feature in
-[`github.com/spf13/viper`](https://github.com/spf13/viper), the library that
-chezmoi uses to read its configuration file. For more information see [this
-GitHub issue](https://github.com/twpayne/chezmoi/issues/463).
-
 ## Why does `chezmoi cd` spawn a shell instead of just changing directory?
 
 `chezmoi cd` spawns a shell because it is not possible for a program to change

assets/chezmoi.io/docs/user-guide/manage-machine-to-machine-differences.md

@@ -33,19 +33,12 @@ machine to machine. For example, for your home machine:
     email = "me@home.org"
 ```
 
-!!! note
-
-    All variable names will be converted to lowercase. This is due to a feature
-    of a library used by chezmoi. See [this GitHub
-    issue](https://github.com/twpayne/chezmoi/issues/463) for more information.
-
 If you intend to store private data (e.g. access tokens) in
 `~/.config/chezmoi/chezmoi.toml`, make sure it has permissions `0600`.
 
-If you prefer, you can use any format supported by
-[Viper](https://github.com/spf13/viper) for your configuration file. This
-includes JSON, YAML, and TOML. Variable names must start with a letter and be
-followed by zero or more letters or digits.
+If you prefer, you can use JSON or YAML for your configuration file. Variable
+names must start with a letter and be followed by zero or more letters or
+digits.
 
 Then, add `~/.gitconfig` to chezmoi using the `--autotemplate` flag to turn it
 into a template and automatically detect variables from the `data` section of

go.mod

@@ -27,9 +27,8 @@ require (
 	github.com/rogpeppe/go-internal v1.9.0
 	github.com/rs/zerolog v1.28.0
 	github.com/sergi/go-diff v1.1.0
-	github.com/spf13/afero v1.9.2
 	github.com/spf13/cobra v1.5.0
-	github.com/spf13/viper v1.13.0
+	github.com/spf13/pflag v1.0.5
 	github.com/stretchr/testify v1.8.0
 	github.com/twpayne/go-pinentry v0.2.0
 	github.com/twpayne/go-shell v0.3.1
@@ -89,14 +88,12 @@ require (
 	github.com/google/go-querystring v1.1.0 // indirect
 	github.com/google/uuid v1.3.0 // indirect
 	github.com/gorilla/css v1.0.0 // indirect
-	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/huandu/xstrings v1.3.2 // indirect
 	github.com/imdario/mergo v0.3.13 // indirect
 	github.com/inconshreveable/mousetrap v1.0.1 // indirect
 	github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 // indirect
 	github.com/kevinburke/ssh_config v1.2.0 // indirect
 	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
-	github.com/magiconair/properties v1.8.6 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.16 // indirect
 	github.com/mattn/go-localereader v0.0.1 // indirect
@@ -109,17 +106,13 @@ require (
 	github.com/muesli/cancelreader v0.2.2 // indirect
 	github.com/muesli/reflow v0.3.0 // indirect
 	github.com/olekukonko/tablewriter v0.0.5 // indirect
-	github.com/pelletier/go-toml v1.9.5 // indirect
 	github.com/peterbourgon/diskv v2.0.1+incompatible // indirect
 	github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/rivo/uniseg v0.4.2 // indirect
 	github.com/shopspring/decimal v1.3.1 // indirect
 	github.com/spf13/cast v1.5.0 // indirect
-	github.com/spf13/jwalterweatherman v1.1.0 // indirect
-	github.com/spf13/pflag v1.0.5 // indirect
-	github.com/subosito/gotenv v1.4.1 // indirect
 	github.com/xanzy/ssh-agent v0.3.2 // indirect
 	github.com/yuin/goldmark v1.4.15 // indirect
 	github.com/yuin/goldmark-emoji v1.0.1 // indirect
@@ -130,7 +123,6 @@ require (
 	google.golang.org/appengine v1.6.7 // indirect
 	google.golang.org/protobuf v1.28.1 // indirect
 	gopkg.in/warnings.v0 v0.1.2 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
 )
 
 exclude github.com/sergi/go-diff v1.2.0 // https://github.com/sergi/go-diff/issues/123