feat(mcp-server-git): Add context_lines to git_diff* tools

src/git/README.md

@@ -16,21 +16,24 @@ Please note that mcp-server-git is currently in early development. The functiona
 
 2. `git_diff_unstaged`
    - Shows changes in working directory not yet staged
-   - Input:
+   - Inputs:
      - `repo_path` (string): Path to Git repository
+     - `context_lines` (number, optional): Number of context lines to show (default: 3)
    - Returns: Diff output of unstaged changes
 
 3. `git_diff_staged`
    - Shows changes that are staged for commit
-   - Input:
+   - Inputs:
      - `repo_path` (string): Path to Git repository
+     - `context_lines` (number, optional): Number of context lines to show (default: 3)
    - Returns: Diff output of staged changes
 
 4. `git_diff`
    - Shows differences between branches or commits
    - Inputs:
      - `repo_path` (string): Path to Git repository
      - `target` (string): Target branch or commit to compare with
+     - `context_lines` (number, optional): Number of context lines to show (default: 3)
    - Returns: Diff output comparing current state with target
 
 5. `git_commit`

src/git/src/mcp_server_git/server.py

@@ -15,18 +15,24 @@
 import git
 from pydantic import BaseModel
 
+# Default number of context lines to show in diff output
+DEFAULT_CONTEXT_LINES = 3
+
 class GitStatus(BaseModel):
     repo_path: str
 
 class GitDiffUnstaged(BaseModel):
     repo_path: str
+    context_lines: int = DEFAULT_CONTEXT_LINES
 
 class GitDiffStaged(BaseModel):
     repo_path: str
+    context_lines: int = DEFAULT_CONTEXT_LINES
 
 class GitDiff(BaseModel):
     repo_path: str
     target: str
+    context_lines: int = DEFAULT_CONTEXT_LINES
 
 class GitCommit(BaseModel):
     repo_path: str
@@ -76,14 +82,14 @@ class GitTools(str, Enum):
 def git_status(repo: git.Repo) -> str:
     return repo.git.status()
 
-def git_diff_unstaged(repo: git.Repo) -> str:
-    return repo.git.diff()
+def git_diff_unstaged(repo: git.Repo, context_lines: int = DEFAULT_CONTEXT_LINES) -> str:
+    return repo.git.diff(f"--unified={context_lines}")
 
-def git_diff_staged(repo: git.Repo) -> str:
-    return repo.git.diff("--cached")
+def git_diff_staged(repo: git.Repo, context_lines: int = DEFAULT_CONTEXT_LINES) -> str:
+    return repo.git.diff(f"--unified={context_lines}", "--cached")
 
-def git_diff(repo: git.Repo, target: str) -> str:
-    return repo.git.diff(target)
+def git_diff(repo: git.Repo, target: str, context_lines: int = DEFAULT_CONTEXT_LINES) -> str:
+    return repo.git.diff(f"--unified={context_lines}", target)
 
 def git_commit(repo: git.Repo, message: str) -> str:
     commit = repo.index.commit(message)
@@ -278,21 +284,21 @@ async def call_tool(name: str, arguments: dict) -> list[TextContent]:
                 )]
 
             case GitTools.DIFF_UNSTAGED:
-                diff = git_diff_unstaged(repo)
+                diff = git_diff_unstaged(repo, arguments.get("context_lines", DEFAULT_CONTEXT_LINES))
                 return [TextContent(
                     type="text",
                     text=f"Unstaged changes:\n{diff}"
                 )]
 
             case GitTools.DIFF_STAGED:
-                diff = git_diff_staged(repo)
+                diff = git_diff_staged(repo, arguments.get("context_lines", DEFAULT_CONTEXT_LINES))
                 return [TextContent(
                     type="text",
                     text=f"Staged changes:\n{diff}"
                 )]
 
             case GitTools.DIFF:
-                diff = git_diff(repo, arguments["target"])
+                diff = git_diff(repo, arguments["target"], arguments.get("context_lines", DEFAULT_CONTEXT_LINES))
                 return [TextContent(
                     type="text",
                     text=f"Diff with {arguments['target']}:\n{diff}"