Add Git commit diff source for tracking code changes

.gitignore

@@ -10,4 +10,4 @@ vendor
 node_modules
 .php-cs-fixer.cache
 .context
-runtime
+runtime/*

README.md

@@ -17,6 +17,7 @@ It automates the process of building context files from various sources:
 
 - code files,
 - GitHub repositories,
+- Git commit changes and diffs
 - Web pages (URLs) with CSS selectors,
 - and plain text.
 
@@ -186,6 +187,25 @@ Create a `context.json` file in your project root:
           ]
         }
       ]
+    },
+    {
+      "description": "Recent Git Changes",
+      "outputPath": "docs/recent-changes.md",
+      "sources": [
+        {
+          "type": "text",
+          "description": "Documentation Header",
+          "content": "# Recent Git Changes\nThis document contains recent changes from the git repository."
+        },
+        {
+          "type": "git_diff",
+          "description": "Recent Commits (Last 1)",
+          "repository": ".",
+          "commit": "last",
+          "filePattern": "*.php",
+          "showStats": true
+        }
+      ]
     }
   ]
 }
@@ -494,6 +514,113 @@ Pull files directly from a GitHub repository:
 }
 ```
 
+### Git Diff Source
+
+The source allows you to include changes from Git commits, providing a streamlined way to show recent code changes:
+
+```json
+{
+  "type": "git_diff",
+  "description": "Recent Git Changes",
+  "commit": "last",
+  "filePattern": "*.php",
+  "notPath": [
+    "tests",
+    "vendor"
+  ],
+  "path": "src",
+  "contains": "class",
+  "notContains": "@deprecated",
+  "showStats": true
+}
+```
+
+#### Commit Range Presets
+
+The Git diff source supports many convenient presets for `commit` parameter:
+
+
+```json
+{
+  "type": "git_diff",
+  "repository": ".",
+  "commit": "last-week", 
+  "filePattern": "*.php"
+}
+```
+
+Available presets include:
+
+- **Basic ranges**:
+  - `last`: Last commit (HEAD~1..HEAD)
+  - `last-2`, `last-3`, `last-5`, `last-10`: Last N commits
+  - `staged`: Changes staged but not committed
+  - `unstaged`: Changes not yet staged
+
+- **Time-based ranges**:
+  - `today`: Changes from today
+  - `last-24h`: Changes in the last 24 hours
+  - `yesterday`: Changes from yesterday
+  - `last-week`: Changes in the last week
+  - `last-2weeks`: Changes in the last two weeks
+  - `last-month`: Changes in the last month
+  - `last-quarter`: Changes in the last three months
+  - `last-year`: Changes in the last year
+
+- **Branch comparisons**:
+  - `main-diff`: Differences between main and current branch
+  - `master-diff`: Differences between master and current branch
+  - `develop-diff`: Differences between develop and current branch
+
+#### Advanced Commit Specifications
+
+You can use more specific Git expressions:
+
+```json
+{
+  "type": "git_diff",
+  "repository": ".",
+  "commit": "abc1234",
+  "filePattern": "*.php"
+}
+```
+
+```json
+{
+  "type": "git_diff",
+  "repository": ".",
+  "commit": "abc1234:path/to/file.php",
+  "filePattern": "*.php"
+}
+```
+
+```json
+{
+  "type": "git_diff",
+  "repository": ".",
+  "commit": "v1.0.0..v2.0.0",
+  "filePattern": "*.php"
+}
+```
+
+```json
+{
+  "type": "git_diff",
+  "repository": ".",
+  "commit": "since:2023-01-15",
+  "filePattern": "*.php"
+}
+```
+
+```json
+{
+  "type": "git_diff",
+  "repository": ".",
+  "commit": "date:2023-01-15",
+  "filePattern": "*.php"
+}
+```
+
 ### URL Source
 
 Fetch content from websites:
@@ -640,6 +767,26 @@ new GithubSource(
 );
 ```
 
+### CommitDiffSource
+
+The `Butschster\ContextGenerator\Source\CommitDiffSource` allows you to include git diff content from commits or staged changes:
+
+```php
+use Butschster\ContextGenerator\Source\CommitDiffSource;
+
+new CommitDiffSource(
+    repository: __DIR__,                  // Path to git repository (use current directory with __DIR__)
+    description: 'Recent changes',        // Optional description
+    commit: 'last',                       // Commit range (preset, hash, or expression)
+    filePattern: '*.php',                 // Pattern to match files (default: *.php)
+    notPath: ['tests', 'vendor'],         // Patterns to exclude
+    path: 'src/Controller',               // Path filter to include
+    contains: 'namespace App',            // Content pattern to include
+    notContains: '@deprecated',           // Content pattern to exclude
+    showStats: true,                      // Whether to show git stats (default: true)
+);
+```
+
 ### UrlSource
 
 The `Butschster\ContextGenerator\Source\UrlSource` allows you to fetch content from websites and extract specific

context.json

@@ -1,5 +1,26 @@
 {
   "documents": [
+    {
+      "description": "Recent Git Changes",
+      "outputPath": "docs/recent-changes.md",
+      "sources": [
+        {
+          "type": "text",
+          "description": "Documentation Header",
+          "content": "# Recent Git Changes\n\nThis document contains recent changes from the git repository.\n"
+        },
+        {
+          "type": "git_diff",
+          "description": "Recent Commits (Last 1)",
+          "commit": "staged",
+          "notPath": [
+            "vendor",
+            "tests"
+          ],
+          "showStats": true
+        }
+      ]
+    },
     {
       "description": "Context generator code.",
       "outputPath": "code.md",
@@ -13,6 +34,20 @@
         }
       ]
     },
+    {
+      "description": "Git finder.",
+      "outputPath": "git_diff.md",
+      "sources": [
+        {
+          "type": "file",
+          "sourcePaths": [
+            "src/Fetcher/Git",
+            "src/Fetcher/FinderResult"
+          ],
+          "filePattern": "*.php"
+        }
+      ]
+    },
     {
       "description": "Context generator tests.",
       "outputPath": "tests.md",

json-schema.json

@@ -61,7 +61,8 @@
             "php_class",
             "url",
             "text",
-            "github"
+            "github",
+            "git_diff"
           ],
           "description": "Type of content source"
         },
@@ -158,6 +159,18 @@
           "then": {
             "$ref": "#/definitions/githubSource"
           }
+        },
+        {
+          "if": {
+            "properties": {
+              "type": {
+                "const": "git_diff"
+              }
+            }
+          },
+          "then": {
+            "$ref": "#/definitions/gitCommitDiffSource"
+          }
         }
       ]
     },
@@ -444,6 +457,136 @@
           "description": "GitHub API token for private repositories (can use env var pattern ${TOKEN_NAME})"
         }
       }
+    },
+    "gitCommitDiffSource": {
+      "properties": {
+        "repository": {
+          "type": "string",
+          "description": "Path to the git repository"
+        },
+        "commit": {
+          "type": "string",
+          "enum": [
+            "last",
+            "last-5",
+            "last-10",
+            "last-week",
+            "last-month",
+            "unstaged",
+            "staged",
+            "wip",
+            "main-diff",
+            "master-diff",
+            "develop-diff",
+            "today",
+            "last-24h",
+            "yesterday",
+            "last-2weeks",
+            "last-quarter",
+            "last-year",
+            "stash",
+            "stash-last",
+            "stash-1",
+            "stash-2",
+            "stash-3",
+            "stash-all",
+            "stash-latest-2",
+            "stash-latest-3",
+            "stash-latest-5",
+            "stash-before-pull",
+            "stash-wip",
+            "stash-untracked",
+            "stash-index"
+          ],
+          "description": "Git commit range (e.g., 'HEAD~5..HEAD')",
+          "default": "staged"
+        },
+        "filePattern": {
+          "oneOf": [
+            {
+              "type": "string",
+              "description": "Pattern to match files (e.g., *.php)"
+            },
+            {
+              "type": "array",
+              "description": "List of patterns to match files (e.g., ['*.php', '*.md'])",
+              "items": {
+                "type": "string"
+              }
+            }
+          ],
+          "default": "*.*"
+        },
+        "path": {
+          "oneOf": [
+            {
+              "type": "string",
+              "description": "Pattern to include only files in specific paths"
+            },
+            {
+              "type": "array",
+              "description": "List of patterns to include only files in specific paths",
+              "items": {
+                "type": "string"
+              }
+            }
+          ],
+          "default": []
+        },
+        "notPath": {
+          "type": "array",
+          "description": "Patterns to exclude files by path",
+          "items": {
+            "type": "string"
+          },
+          "default": []
+        },
+        "contains": {
+          "oneOf": [
+            {
+              "type": "string",
+              "description": "Pattern to include only diffs containing specific content"
+            },
+            {
+              "type": "array",
+              "description": "List of patterns to include only diffs containing specific content",
+              "items": {
+                "type": "string"
+              }
+            }
+          ],
+          "default": []
+        },
+        "notContains": {
+          "oneOf": [
+            {
+              "type": "string",
+              "description": "Pattern to exclude diffs containing specific content"
+            },
+            {
+              "type": "array",
+              "description": "List of patterns to exclude diffs containing specific content",
+              "items": {
+                "type": "string"
+              }
+            }
+          ],
+          "default": []
+        },
+        "showStats": {
+          "type": "boolean",
+          "description": "Whether to show commit stats in output",
+          "default": true
+        },
+        "modifiers": {
+          "type": "array",
+          "description": "List of content modifiers to apply",
+          "items": {
+            "type": "string"
+          },
+          "default": []
+        }
+      }
     }
   }
 }