feat: Add stats command to allow user to compare aider usage across different revision

aider/args.py

@@ -553,6 +553,13 @@ def get_parser(default_config_files, git_root):
         help="Run tests, fix problems found and then exit",
         default=False,
     )
+    group.add_argument(
+        "--stats",
+        metavar="REVISIONS",
+        nargs="?",
+        const="HEAD",
+        help="Show code changes statistics between revisions",
+    )
 
     ##########
     group = parser.add_argument_group("Analytics")

aider/commands.py

@@ -4,7 +4,7 @@
 import subprocess
 import sys
 import tempfile
-from collections import OrderedDict
+from collections import OrderedDict, defaultdict
 from os.path import expanduser
 from pathlib import Path
 
@@ -23,6 +23,7 @@
 from aider.run_cmd import run_cmd
 from aider.scrape import Scraper, install_playwright
 from aider.utils import is_image_file
+from aider.stats import hash_len, get_all_commit_hashes_between_tags, get_commit_authors, get_counts_for_file
 
 from .dump import dump  # noqa: F401
 
@@ -1484,6 +1485,95 @@ def cmd_multiline_mode(self, args):
         "Toggle multiline mode (swaps behavior of Enter and Meta+Enter)"
         self.io.toggle_multiline_mode()
 
+    def cmd_stats(self, args):
+        """Show statistics about code changes and aider's contributions by counting lines of code through git blame.
+
+        Usage:
+            /stats                   Compare against main/master branch
+            /stats <revision>        Compare against specific revision
+            /stats rev1..rev2        Compare between two specific revisions
+
+        Examples:
+            /stats                   Show stats vs main/master branch
+            /stats HEAD~5            Show stats vs 5 commits ago
+            /stats v1.0.0           Show stats vs version 1.0.0
+            /stats main..HEAD        Show stats between main and current HEAD
+
+        Lines are attributed to aider when the git author or committer contains "(aider)".
+        Binary files (images, audio, etc.) are excluded from the analysis.
+        """
+        if not self.coder.repo:
+            self.io.tool_error("No git repository found.")
+            return
+
+        try:
+            # Get the revision range
+            if not args:
+                # Default to comparing against main/master branch
+                for default_branch in ["main", "master"]:
+                    try:
+                        self.coder.repo.repo.rev_parse(default_branch)
+                        args = default_branch
+                        break
+                    except:
+                        continue
+                if not args:
+                    self.io.tool_error("No main or master branch found. Please specify a revision.")
+                    return
+            source_revision, target_revision = args.split("..") if ".." in args else (args, "HEAD")
+            commits = get_all_commit_hashes_between_tags(source_revision, target_revision)
+            commits = [commit[:hash_len] for commit in commits] if commits else []
+            if not commits:
+                self.io.tool_error(
+                    f"There are no commits between the specified revisions from {source_revision} to {target_revision}."
+                )
+                return
+            authors = get_commit_authors(commits)
+
+            # Get files changed between revisions
+            diff_files = self.coder.repo.repo.git.diff(
+                "--name-only", f"{source_revision}..{target_revision}"
+            ).splitlines()
+            # Filter out media files
+            files = [f for f in diff_files if not any(f.lower().endswith(ext) for ext in (
+                '.jpg', '.jpeg', '.png', '.gif', '.bmp', '.tiff', '.ico', '.svg',  # images
+                '.mp3', '.wav', '.ogg', '.m4a', '.flac',  # audio
+                '.mp4', '.avi', '.mov', '.wmv', '.flv', '.webm',  # video
+                '.pdf', '.doc', '.docx', '.ppt', '.pptx', '.xls', '.xlsx',  # documents
+                '.zip', '.tar', '.gz', '.7z', '.rar',  # archives
+                '.ttf', '.otf', '.woff', '.woff2', '.eot'  # fonts
+            ))]
+            self.io.tool_output(f"Found {len(files)} non-binary tracked files in the repository.")
+
+            all_file_counts = {}
+            grand_total = defaultdict(int)
+            aider_total = 0
+            for file in files:
+                file_counts = get_counts_for_file(source_revision, target_revision, authors, file)
+                if file_counts:
+                    all_file_counts[file] = file_counts
+                    for author, count in file_counts.items():
+                        grand_total[author] += count
+                        if "(aider)" in author.lower():
+                            aider_total += count
+            total_lines = sum(grand_total.values())
+            aider_percentage = (aider_total / total_lines) * 100 if total_lines > 0 else 0
+
+            # Calculate percentages
+            if total_lines > 0:
+                # Output overall statistics
+                self.io.tool_output(f"\nAnalysis from {source_revision} to {target_revision}:")
+                self.io.tool_output(f"Total lines analyzed: {total_lines:,}")
+                self.io.tool_output(f"Lines by aider: {aider_total:,} ({aider_percentage:.1f}%)")
+                self.io.tool_output(f"Lines by humans: {total_lines - aider_total:,} ({100 - aider_percentage:.1f}%)")
+
+            else:
+                self.io.tool_output("No lines of code found in the repository.")
+
+        except Exception as e:
+            self.io.tool_error(f"Error analyzing aider statistics: {e}")
+
+
     def cmd_copy(self, args):
         "Copy the last assistant message to the clipboard"
         all_messages = self.coder.done_messages + self.coder.cur_messages

aider/main.py

@@ -1142,6 +1142,11 @@ def get_io(pretty):
         analytics.event("exit", reason="Completed --message-file")
         return
 
+    if args.stats:
+        commands.cmd_stats(args.stats)
+        analytics.event("exit", reason="Completed --stats")
+        return
+
     if args.exit:
         analytics.event("exit", reason="Exit flag set")
         return

aider/stats.py

@@ -0,0 +1,121 @@
+import subprocess
+import sys
+
+from collections import defaultdict
+
+# Length of abbreviated git hash used in blame output
+hash_len = len("44e6fefc2")
+
+def run(cmd):
+    """Execute a git command and return its output.
+
+    Args:
+        cmd: List containing the command and its arguments
+
+    Returns:
+        String output of the command
+    """
+    result = subprocess.run(cmd, capture_output=True, text=True, check=True)
+    return result.stdout
+
+def get_all_commit_hashes_between_tags(start_tag, end_tag=None):
+    """Get all commit hashes between two tags or from a tag to HEAD.
+
+    Args:
+        start_tag: Starting tag or commit hash
+        end_tag: Ending tag or commit hash (defaults to HEAD)
+
+    Returns:
+        List of commit hashes or None if no commits found
+    """
+    if end_tag:
+        res = run(["git", "rev-list", f"{start_tag}..{end_tag}"])
+    else:
+        res = run(["git", "rev-list", f"{start_tag}..HEAD"])
+
+    if res:
+        commit_hashes = res.strip().split("\n")
+        return commit_hashes
+    return None
+
+def get_commit_authors(commits):
+    """Map commit hashes to their authors, marking aider-generated commits.
+
+    Args:
+        commits: List of commit hashes
+
+    Returns:
+        Dictionary mapping commit hashes to author names
+    """
+    commit_to_author = dict()
+    for commit in commits:
+        author = run(["git", "show", "-s", "--format=%an", commit]).strip()
+        commit_message = run(["git", "show", "-s", "--format=%s", commit]).strip()
+        if commit_message.lower().startswith("aider:"):
+            author += " (aider)"
+        commit_to_author[commit] = author
+    return commit_to_author
+
+def get_counts_for_file(start_tag, end_tag, authors, fname):
+    """Count lines attributed to each author in a file using git blame.
+
+    Args:
+        start_tag: Starting tag or commit hash
+        end_tag: Ending tag or commit hash (defaults to HEAD)
+        authors: Dictionary mapping commit hashes to author names
+        fname: File path to analyze
+
+    Returns:
+        Dictionary mapping author names to line counts, or None if file not found
+    """
+    try:
+        if end_tag:
+            text = run(
+                [
+                    "git",
+                    "blame",
+                    "-M100",  # Detect moved lines within a file with 100% similarity
+                    "-C100",  # Detect moves across files with 100% similarity
+                    "-C",  # Increase detection effort
+                    "-C",  # Increase detection effort even more
+                    "--abbrev=9",
+                    f"{start_tag}..{end_tag}",
+                    "--",
+                    fname,
+                ]
+            )
+        else:
+            text = run(
+                [
+                    "git",
+                    "blame",
+                    "-M100",  # Detect moved lines within a file with 100% similarity
+                    "-C100",  # Detect moves across files with 100% similarity
+                    "-C",  # Increase detection effort
+                    "-C",  # Increase detection effort even more
+                    "--abbrev=9",
+                    f"{start_tag}..HEAD",
+                    "--",
+                    fname,
+                ]
+            )
+        if not text:
+            return None
+        text = text.splitlines()
+        line_counts = defaultdict(int)
+        for line in text:
+            if line.startswith("^"):
+                continue
+            hsh = line[:hash_len]
+            author = authors.get(hsh, "Unknown")
+            line_counts[author] += 1
+
+        return dict(line_counts)
+    except subprocess.CalledProcessError as e:
+        if "no such path" in str(e).lower():
+            # File doesn't exist in this revision range, which is okay
+            return None
+        else:
+            # Some other error occurred
+            print(f"Warning: Unable to blame file {fname}. Error: {e}", file=sys.stderr)
+            return None

scripts/blame.py

@@ -2,8 +2,6 @@
 
 import argparse
 import os
-import subprocess
-import sys
 from collections import defaultdict
 from datetime import datetime
 from operator import itemgetter
@@ -12,6 +10,8 @@
 import yaml
 from tqdm import tqdm
 
+from aider.stats import get_all_commit_hashes_between_tags, run, hash_len, get_commit_authors, get_counts_for_file
+
 website_files = [
     "aider/website/index.html",
     "aider/website/share/index.md",
@@ -68,36 +68,6 @@ def blame(start_tag, end_tag=None):
     return all_file_counts, grand_total, total_lines, aider_total, aider_percentage, end_date
 
 
-def get_all_commit_hashes_between_tags(start_tag, end_tag=None):
-    if end_tag:
-        res = run(["git", "rev-list", f"{start_tag}..{end_tag}"])
-    else:
-        res = run(["git", "rev-list", f"{start_tag}..HEAD"])
-
-    if res:
-        commit_hashes = res.strip().split("\n")
-        return commit_hashes
-
-
-def run(cmd):
-    # Get all commit hashes since the specified tag
-    result = subprocess.run(cmd, capture_output=True, text=True, check=True)
-    return result.stdout
-
-
-def get_commit_authors(commits):
-    commit_to_author = dict()
-    for commit in commits:
-        author = run(["git", "show", "-s", "--format=%an", commit]).strip()
-        commit_message = run(["git", "show", "-s", "--format=%s", commit]).strip()
-        if commit_message.lower().startswith("aider:"):
-            author += " (aider)"
-        commit_to_author[commit] = author
-    return commit_to_author
-
-
-hash_len = len("44e6fefc2")
-
 
 def process_all_tags_since(start_tag):
     tags = get_all_tags_since(start_tag)