Migrate null keybindings to <disabled>, and remove our yaml fork (#3459)

- **PR Description**

Migrate users' config files to change all `null` keybindings to
`"<disabled>"`. Then remove our yaml fork, since that was the only
reason we were using it.

Fixes #3458.

24 files changed, 205 insertions, 9877 deletions

diff --git a/go.mod b/go.mod
index 58ad19c3c..8993d7504 100644
--- a/go.mod
+++ b/go.mod
@@ -20,7 +20,6 @@ require (
 	github.com/jesseduffield/kill v0.0.0-20220618033138-bfbe04675d10
 	github.com/jesseduffield/lazycore v0.0.0-20221012050358-03d2e40243c5
 	github.com/jesseduffield/minimal/gitignore v0.3.3-0.20211018110810-9cde264e6b1e
-	github.com/jesseduffield/yaml v2.1.0+incompatible
 	github.com/kardianos/osext v0.0.0-20190222173326-2bc1f35cddc0
 	github.com/karimkhaleel/jsonschema v0.0.0-20231001195015-d933f0d94ea3
 	github.com/kyokomi/emoji/v2 v2.2.8
diff --git a/go.sum b/go.sum
index 0e728ff52..ee6c9cfbb 100644
--- a/go.sum
+++ b/go.sum
@@ -195,8 +195,6 @@ github.com/jesseduffield/lazycore v0.0.0-20221012050358-03d2e40243c5 h1:CDuQmfOj
 github.com/jesseduffield/lazycore v0.0.0-20221012050358-03d2e40243c5/go.mod h1:qxN4mHOAyeIDLP7IK7defgPClM/z1Kze8VVQiaEjzsQ=
 github.com/jesseduffield/minimal/gitignore v0.3.3-0.20211018110810-9cde264e6b1e h1:uw/oo+kg7t/oeMs6sqlAwr85ND/9cpO3up3VxphxY0U=
 github.com/jesseduffield/minimal/gitignore v0.3.3-0.20211018110810-9cde264e6b1e/go.mod h1:u60qdFGXRd36jyEXxetz0vQceQIxzI13lIo3EFUDf4I=
-github.com/jesseduffield/yaml v2.1.0+incompatible h1:HWQJ1gIv2zHKbDYNp0Jwjlj24K8aqpFHnMCynY1EpmE=
-github.com/jesseduffield/yaml v2.1.0+incompatible/go.mod h1:w0xGhOSIJCGYYW+hnFPTutCy5aACpkcwbmORt5axGqk=
 github.com/jessevdk/go-flags v1.4.0/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
 github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
 github.com/jstemmer/go-junit-report v0.0.0-20190106144839-af01ea7f8024/go.mod h1:6v2b51hI/fHJwM22ozAgKL4VKDeJcHhJFhtBdhmNjmU=
diff --git a/pkg/config/app_config.go b/pkg/config/app_config.go
index 7f5757447..cd0d3e316 100644
--- a/pkg/config/app_config.go
+++ b/pkg/config/app_config.go
@@ -8,7 +8,7 @@ import (
 
 	"github.com/adrg/xdg"
 	"github.com/jesseduffield/lazygit/pkg/utils/yaml_utils"
-	yaml "github.com/jesseduffield/yaml"
+	"gopkg.in/yaml.v3"
 )
 
 // AppConfig contains the base configuration fields required for lazygit.
@@ -180,6 +180,11 @@ func migrateUserConfig(path string, content []byte) ([]byte, error) {
 		return nil, fmt.Errorf("Couldn't migrate config file at `%s`: %s", path, err)
 	}
 
+	changedContent, err = changeNullKeybindingsToDisabled(changedContent)
+	if err != nil {
+		return nil, fmt.Errorf("Couldn't migrate config file at `%s`: %s", path, err)
+	}
+
 	// Add more migrations here...
 
 	// Write config back if changed
@@ -193,6 +198,17 @@ func migrateUserConfig(path string, content []byte) ([]byte, error) {
 	return content, nil
 }
 
+func changeNullKeybindingsToDisabled(changedContent []byte) ([]byte, error) {
+	return yaml_utils.Walk(changedContent, func(node *yaml.Node, path string) bool {
+		if strings.HasPrefix(path, "keybinding.") && node.Kind == yaml.ScalarNode && node.Tag == "!!null" {
+			node.Value = "<disabled>"
+			node.Tag = "!!str"
+			return true
+		}
+		return false
+	})
+}
+
 func (c *AppConfig) GetDebug() bool {
 	return c.Debug
 }
diff --git a/pkg/config/dummies.go b/pkg/config/dummies.go
index 08150c765..077c93c57 100644
--- a/pkg/config/dummies.go
+++ b/pkg/config/dummies.go
@@ -1,7 +1,7 @@
 package config
 
 import (
-	yaml "github.com/jesseduffield/yaml"
+	"gopkg.in/yaml.v3"
 )
 
 // NewDummyAppConfig creates a new dummy AppConfig for testing
diff --git a/pkg/utils/yaml_utils/yaml_utils.go b/pkg/utils/yaml_utils/yaml_utils.go
index 9d96fa7a7..48f70fff0 100644
--- a/pkg/utils/yaml_utils/yaml_utils.go
+++ b/pkg/utils/yaml_utils/yaml_utils.go
@@ -153,3 +153,74 @@ func renameYamlKey(node *yaml.Node, path []string, newKey string) (bool, error)
 
 	return renameYamlKey(valueNode, path[1:], newKey)
 }
+
+// Traverses a yaml document, calling the callback function for each node. The
+// callback is allowed to modify the node in place, in which case it should
+// return true. The function returns the original yaml document if none of the
+// callbacks returned true, and the modified document otherwise.
+func Walk(yamlBytes []byte, callback func(node *yaml.Node, path string) bool) ([]byte, error) {
+	// Parse the YAML file.
+	var node yaml.Node
+	err := yaml.Unmarshal(yamlBytes, &node)
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse YAML: %w", err)
+	}
+
+	// Empty document: nothing to do.
+	if len(node.Content) == 0 {
+		return yamlBytes, nil
+	}
+
+	body := node.Content[0]
+
+	if didChange, err := walk(body, "", callback); err != nil || !didChange {
+		return yamlBytes, err
+	}
+
+	// Convert the updated YAML node back to YAML bytes.
+	updatedYAMLBytes, err := yaml.Marshal(body)
+	if err != nil {
+		return nil, fmt.Errorf("failed to convert YAML node to bytes: %w", err)
+	}
+
+	return updatedYAMLBytes, nil
+}
+
+func walk(node *yaml.Node, path string, callback func(*yaml.Node, string) bool) (bool, error) {
+	didChange := callback(node, path)
+	switch node.Kind {
+	case yaml.DocumentNode:
+		return false, fmt.Errorf("Unexpected document node in the middle of a yaml tree")
+	case yaml.MappingNode:
+		for i := 0; i < len(node.Content); i += 2 {
+			name := node.Content[i].Value
+			childNode := node.Content[i+1]
+			var childPath string
+			if path == "" {
+				childPath = name
+			} else {
+				childPath = fmt.Sprintf("%s.%s", path, name)
+			}
+			didChangeChild, err := walk(childNode, childPath, callback)
+			if err != nil {
+				return false, err
+			}
+			didChange = didChange || didChangeChild
+		}
+	case yaml.SequenceNode:
+		for i := 0; i < len(node.Content); i++ {
+			childPath := fmt.Sprintf("%s[%d]", path, i)
+			didChangeChild, err := walk(node.Content[i], childPath, callback)
+			if err != nil {
+				return false, err
+			}
+			didChange = didChange || didChangeChild
+		}
+	case yaml.ScalarNode:
+		// nothing to do
+	case yaml.AliasNode:
+		return false, fmt.Errorf("Alias nodes are not supported")
+	}
+
+	return didChange, nil
+}
diff --git a/pkg/utils/yaml_utils/yaml_utils_test.go b/pkg/utils/yaml_utils/yaml_utils_test.go
index 7f9dc20f7..78e181d85 100644
--- a/pkg/utils/yaml_utils/yaml_utils_test.go
+++ b/pkg/utils/yaml_utils/yaml_utils_test.go
@@ -4,6 +4,7 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v3"
 )
 
 func TestUpdateYamlValue(t *testing.T) {
@@ -199,3 +200,118 @@ func TestRenameYamlKey(t *testing.T) {
 		})
 	}
 }
+
+func TestWalk_paths(t *testing.T) {
+	tests := []struct {
+		name          string
+		document      string
+		expectedPaths []string
+	}{
+		{
+			name:          "empty document",
+			document:      "",
+			expectedPaths: []string{},
+		},
+		{
+			name:          "scalar",
+			document:      "x: 5",
+			expectedPaths: []string{"", "x"}, // called with an empty path for the root node
+		},
+		{
+			name:          "nested",
+			document:      "foo:\n  x: 5",
+			expectedPaths: []string{"", "foo", "foo.x"},
+		},
+		{
+			name:          "deeply nested",
+			document:      "foo:\n  bar:\n    baz: 5",
+			expectedPaths: []string{"", "foo", "foo.bar", "foo.bar.baz"},
+		},
+		{
+			name:          "array",
+			document:      "foo:\n  bar: [3, 7]",
+			expectedPaths: []string{"", "foo", "foo.bar", "foo.bar[0]", "foo.bar[1]"},
+		},
+		{
+			name:          "nested arrays",
+			document:      "foo:\n  bar: [[3, 7], [8, 9]]",
+			expectedPaths: []string{"", "foo", "foo.bar", "foo.bar[0]", "foo.bar[0][0]", "foo.bar[0][1]", "foo.bar[1]", "foo.bar[1][0]", "foo.bar[1][1]"},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			paths := []string{}
+			_, err := Walk([]byte(test.document), func(node *yaml.Node, path string) bool {
+				paths = append(paths, path)
+				return true
+			})
+
+			assert.NoError(t, err)
+			assert.Equal(t, test.expectedPaths, paths)
+		})
+	}
+}
+
+func TestWalk_inPlaceChanges(t *testing.T) {
+	tests := []struct {
+		name        string
+		in          string
+		callback    func(node *yaml.Node, path string) bool
+		expectedOut string
+	}{
+		{
+			name:        "no change",
+			in:          "x: 5",
+			callback:    func(node *yaml.Node, path string) bool { return false },
+			expectedOut: "x: 5",
+		},
+		{
+			name: "change value",
+			in:   "x: 5\ny: 3",
+			callback: func(node *yaml.Node, path string) bool {
+				if path == "x" {
+					node.Value = "7"
+					return true
+				}
+				return false
+			},
+			expectedOut: "x: 7\ny: 3\n",
+		},
+		{
+			name: "change nested value",
+			in:   "x:\n  y: 5",
+			callback: func(node *yaml.Node, path string) bool {
+				if path == "x.y" {
+					node.Value = "7"
+					return true
+				}
+				return false
+			},
+			// indentation is not preserved. See https://github.com/go-yaml/yaml/issues/899
+			expectedOut: "x:\n    y: 7\n",
+		},
+		{
+			name: "change array value",
+			in:   "x:\n  - y: 5",
+			callback: func(node *yaml.Node, path string) bool {
+				if path == "x[0].y" {
+					node.Value = "7"
+					return true
+				}
+				return false
+			},
+			// indentation is not preserved. See https://github.com/go-yaml/yaml/issues/899
+			expectedOut: "x:\n    - y: 7\n",
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			result, err := Walk([]byte(test.in), test.callback)
+
+			assert.NoError(t, err)
+			assert.Equal(t, test.expectedOut, string(result))
+		})
+	}
+}
diff --git a/vendor/github.com/jesseduffield/yaml/LICENSE b/vendor/github.com/jesseduffield/yaml/LICENSE
deleted file mode 100644
index 8dada3eda..000000000
--- a/vendor/github.com/jesseduffield/yaml/LICENSE
+++ /dev/null
@@ -1,201 +0,0 @@
-                                 Apache License
-                           Version 2.0, January 2004
-                        http://www.apache.org/licenses/
-
-   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
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-      of this License, Derivative Works shall not include works that remain
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-      the Work and Derivative Works thereof.
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-      "Contribution" shall mean any work of authorship, including
-      the original version of the Work and any modifications or additions
-      to that Work or Derivative Works thereof, that is intentionally
-      submitted to Licensor for inclusion in the Work by the copyright owner
-      or by an individual or Legal Entity authorized to submit on behalf of
-      the copyright owner. For the purposes of this definition, "submitted"
-      means any form of electronic, verbal, or written communication sent
-      to the Licensor or its representatives, including but not limited to
-      communication on electronic mailing lists, source code control systems,
-      and issue tracking systems that are managed by, or on behalf of, the
-      Licensor for the purpose of discussing and improving the Work, but
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-      designated in writing by the copyright owner as "Not a Contribution."
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-      on behalf of whom a Contribution has been received by Licensor and
-      subsequently incorporated within the Work.
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-   2. Grant of Copyright License. Subject to the terms and conditions of
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-      where such license applies only to those patent claims licensable
-      by such Contributor that are necessarily infringed by their
-      Contribution(s) alone or by combination of their Contribution(s)
-      with the Work to which such Contribution(s) was submitted. If You
-      institute patent litigation against any entity (including a
-      cross-claim or counterclaim in a lawsuit) alleging that the Work
-      or a Contribution incorporated within the Work constitutes direct
-      or contributory patent infringement, then any patent licenses
-      granted to You under this License for that Work shall terminate
-      as of the date such litigation is filed.
-
-   4. Redistribution. You may reproduce and distribute copies of the
-      Work or Derivative Works thereof in any medium, with or without
-      modifications, and in Source or Object form, provided that You
-      meet the following conditions:
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-      (a) You must give any other recipients of the Work or
-          Derivative Works a copy of this License; and
-
-      (b) You must cause any modified files to carry prominent notices
-          stating that You changed the files; and
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-      (c) You must retain, in the Source form of any Derivative Works
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-      (d) If the Work includes a "NOTICE" text file as part of its
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-          of the NOTICE file are for informational purposes only and
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-          that such additional attribution notices cannot be construed
-          as modifying the License.
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-      You may add Your own copyright statement to Your modifications and
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-      the conditions stated in this License.
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-   5. Submission of Contributions. Unless You explicitly state otherwise,
-      any Contribution intentionally submitted for inclusion in the Work
-      by You to the Licensor shall be under the terms and conditions of
-      this License, without any additional terms or conditions.
-      Notwithstanding the above, nothing herein shall supersede or modify
-      the terms of any separate license agreement you may have executed
-      with Licensor regarding such Contributions.
-
-   6. Trademarks. This License does not grant permission to use the trade
-      names, trademarks, service marks, or product names of the Licensor,
-      except as required for reasonable and customary use in describing the
-      origin of the Work and reproducing the content of the NOTICE file.
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-   7. Disclaimer of Warranty. Unless required by applicable law or
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diff --git a/vendor/github.com/jesseduffield/yaml/LICENSE.libyaml b/vendor/github.com/jesseduffield/yaml/LICENSE.libyaml
deleted file mode 100644
index 8da58fbf6..000000000
--- a/vendor/github.com/jesseduffield/yaml/LICENSE.libyaml
+++ /dev/null
@@ -1,31 +0,0 @@
-The following files were ported to Go from C files of libyaml, and thus
-are still covered by their original copyright and license:
-
-    apic.go
-    emitterc.go
-    parserc.go
-    readerc.go
-    scannerc.go
-    writerc.go
-    yamlh.go
-    yamlprivateh.go
-
-Copyright (c) 2006 Kirill Simonov
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal in
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
-of the Software, and to permit persons to whom the Software is furnished to do
-so, subject to the following conditions:
-
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-copies or substantial portions of the Software.
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-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
diff --git a/vendor/github.com/jesseduffield/yaml/NOTICE b/vendor/github.com/jesseduffield/yaml/NOTICE
deleted file mode 100644
index 866d74a7a..000000000
--- a/vendor/github.com/jesseduffield/yaml/NOTICE
+++ /dev/null
@@ -1,13 +0,0 @@
-Copyright 2011-2016 Canonical Ltd.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
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diff --git a/vendor/github.com/jesseduffield/yaml/README.md b/vendor/github.com/jesseduffield/yaml/README.md
deleted file mode 100644
index 2ed3314c7..000000000
--- a/vendor/github.com/jesseduffield/yaml/README.md
+++ /dev/null
@@ -1,135 +0,0 @@
-# YAML support for the Go language
-
-Introduction
-------------
-
-The yaml package enables Go programs to comfortably encode and decode YAML
-values. It was developed within [Canonical](https://www.canonical.com) as
-part of the [juju](https://juju.ubuntu.com) project, and is based on a
-pure Go port of the well-known [libyaml](http://pyyaml.org/wiki/LibYAML)
-C library to parse and generate YAML data quickly and reliably.
-
-Compatibility
--------------
-
-The yaml package supports most of YAML 1.1 and 1.2, including support for
-anchors, tags, map merging, etc. Multi-document unmarshalling is not yet
-implemented, and base-60 floats from YAML 1.1 are purposefully not
-supported since they're a poor design and are gone in YAML 1.2.
-
-Installation and usage
-----------------------
-
-The import path for the package is *gopkg.in/yaml.v2*.
-
-To install it, run:
-
-    go get gopkg.in/yaml.v2
-
-API documentation
------------------
-
-If opened in a browser, the import path itself leads to the API documentation:
-
-  * [https://gopkg.in/yaml.v2](https://gopkg.in/yaml.v2)
-
-API stability
--------------
-
-The package API for yaml v2 will remain stable as described in [gopkg.in](https://gopkg.in).
-
-
-License
--------
-
-The yaml package is licensed under the Apache License 2.0. Please see the LICENSE file for details.
-
-
-Example
--------
-
-Some more examples can be found in the "examples" folder.
-
-```Go
-package main
-
-import (
-        "fmt"
-        "log"
-
-        "gopkg.in/yaml.v2"
-)
-
-var data = `
-a: Easy!
-b:
-  c: 2
-  d: [3, 4]
-`
-
-// Note: struct fields must be public in order for unmarshal to
-// correctly populate the data.
-type T struct {
-        A string
-        B struct {
-                RenamedC int   `yaml:"c"`
-                D        []int `yaml:",flow"`
-        }
-}
-
-func main() {
-        t := T{}
-    
-        err := yaml.Unmarshal([]byte(data), &t)
-        if err != nil {
-                log.Fatalf("error: %v", err)
-        }
-        fmt.Printf("--- t:\n%v\n\n", t)
-    
-        d, err := yaml.Marshal(&t)
-        if err != nil {
-                log.Fatalf("error: %v", err)
-        }
-        fmt.Printf("--- t dump:\n%s\n\n", string(d))
-    
-        m := make(map[interface{}]interface{})
-    
-        err = yaml.Unmarshal([]byte(data), &m)
-        if err != nil {
-                log.Fatalf("error: %v", err)
-        }
-        fmt.Printf("--- m:\n%v\n\n", m)
-    
-        d, err = yaml.Marshal(&m)
-        if err != nil {
-                log.Fatalf("error: %v", err)
-        }
-        fmt.Printf("--- m dump:\n%s\n\n", string(d))
-}
-```
-
-This example will generate the following output:
-
-```
---- t:
-{Easy! {2 [3 4]}}
-
---- t dump:
-a: Easy!
-b:
-  c: 2
-  d: [3, 4]
-
-
---- m:
-map[a:Easy! b:map[c:2 d:[3 4]]]
-
---- m dump:
-a: Easy!
-b:
-  c: 2
-  d:
-  - 3
-  - 4
-```
-
diff --git a/vendor/github.com/jesseduffield/yaml/apic.go b/vendor/github.com/jesseduffield/yaml/apic.go
deleted file mode 100644
index 3e24a0d7d..000000000
--- a/vendor/github.com/jesseduffield/yaml/apic.go
+++ /dev/null
@@ -1,739 +0,0 @@
-package yaml
-
-import (
-	"io"
-)
-
-func yaml_insert_token(parser *yaml_parser_t, pos int, token *yaml_token_t) {
-	//fmt.Println("yaml_insert_token", "pos:", pos, "typ:", token.typ, "head:", parser.tokens_head, "len:", len(parser.tokens))
-
-	// Check if we can move the queue at the beginning of the buffer.
-	if parser.tokens_head > 0 && len(parser.tokens) == cap(parser.tokens) {
-		if parser.tokens_head != len(parser.tokens) {
-			copy(parser.tokens, parser.tokens[parser.tokens_head:])
-		}
-		parser.tokens = parser.tokens[:len(parser.tokens)-parser.tokens_head]
-		parser.tokens_head = 0
-	}
-	parser.tokens = append(parser.tokens, *token)
-	if pos < 0 {
-		return
-	}
-	copy(parser.tokens[parser.tokens_head+pos+1:], parser.tokens[parser.tokens_head+pos:])
-	parser.tokens[parser.tokens_head+pos] = *token
-}
-
-// Create a new parser object.
-func yaml_parser_initialize(parser *yaml_parser_t) bool {
-	*parser = yaml_parser_t{
-		raw_buffer: make([]byte, 0, input_raw_buffer_size),
-		buffer:     make([]byte, 0, input_buffer_size),
-	}
-	return true
-}
-
-// Destroy a parser object.
-func yaml_parser_delete(parser *yaml_parser_t) {
-	*parser = yaml_parser_t{}
-}
-
-// String read handler.
-func yaml_string_read_handler(parser *yaml_parser_t, buffer []byte) (n int, err error) {
-	if parser.input_pos == len(parser.input) {
-		return 0, io.EOF
-	}
-	n = copy(buffer, parser.input[parser.input_pos:])
-	parser.input_pos += n
-	return n, nil