Add configuration options for ecosystems and ignored files/directories

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 - `git pkgs init` now installs git hooks by default (use `--no-hooks` to skip)
 - Fix N+1 queries in `blame`, `stale`, `stats`, and `log` commands
+- Configuration via git config: `pkgs.ecosystems`, `pkgs.ignoredDirs`, `pkgs.ignoredFiles`
+- `git pkgs info --ecosystems` to show available ecosystems and their status
 
 ## [0.4.0] - 2026-01-04
 

README.md

@@ -379,6 +379,21 @@ git-pkgs respects [standard git configuration](https://git-scm.com/docs/git-conf
 
 **Pager** follows git's precedence: `GIT_PAGER` env, `core.pager` config, `PAGER` env, then `less -FRSX`. Use `--no-pager` flag or `git config core.pager cat` to disable.
 
+**Ecosystem filtering** lets you limit which package ecosystems are tracked:
+
+```bash
+git config --add pkgs.ecosystems rubygems
+git config --add pkgs.ecosystems npm
+git pkgs info --ecosystems  # show enabled/disabled ecosystems
+```
+
+**Ignored paths** let you skip directories or files from analysis:
+
+```bash
+git config --add pkgs.ignoredDirs third_party
+git config --add pkgs.ignoredFiles test/fixtures/package.json
+```
+
 **Environment variables:**
 
 - `GIT_DIR` - git directory location (standard git variable)
@@ -399,7 +414,11 @@ Optimizations:
 
 git-pkgs uses [ecosystems-bibliothecary](https://github.com/ecosyste-ms/bibliothecary) for parsing, supporting:
 
-Actions, Anaconda, BentoML, Bower, Cargo, CocoaPods, Cog, CPAN, CRAN, CycloneDX, Docker, Dub, DVC, Elm, Go, Haxelib, Homebrew, Julia, Maven, Meteor, MLflow, npm, NuGet, Ollama, Packagist, Pub, PyPI, RubyGems, Shards, SPDX, Vcpkg
+Actions, BentoML, Bower, Cargo, CocoaPods, Cog, Conda, CPAN, CRAN, Docker, Dub, DVC, Elm, Go, Haxelib, Homebrew, Julia, Maven, Meteor, MLflow, npm, NuGet, Ollama, Packagist, Pub, PyPI, RubyGems, Shards, Vcpkg
+
+Some ecosystems require remote parsing services and are disabled by default: Carthage, Clojars, Hackage, Hex, SwiftPM. Enable with `git config --add pkgs.ecosystems <name>`.
+
+SBOM formats (CycloneDX, SPDX) are not supported as they duplicate information from the actual lockfiles.
 
 ## Contributing
 

lib/git/pkgs.rb

@@ -3,6 +3,7 @@
 require_relative "pkgs/version"
 require_relative "pkgs/output"
 require_relative "pkgs/color"
+require_relative "pkgs/config"
 require_relative "pkgs/cli"
 require_relative "pkgs/database"
 require_relative "pkgs/repository"

lib/git/pkgs/analyzer.rb

@@ -24,8 +24,6 @@ class Analyzer
         Podfile Podfile.lock *.podspec *.podspec.json
         packages.config packages.lock.json Project.json Project.lock.json
         *.nuspec paket.lock *.csproj project.assets.json
-        cyclonedx.xml cyclonedx.json *.cdx.xml *.cdx.json
-        *.spdx *.spdx.json
         bower.json bentofile.yaml
         META.json META.yml
         environment.yml environment.yaml
@@ -56,6 +54,7 @@ class Analyzer
       def initialize(repository)
         @repository = repository
         @blob_cache = {}
+        Config.configure_bibliothecary
       end
 
       # Quick check if any paths might be manifests (fast regex check)
@@ -262,6 +261,7 @@ def parse_manifest_by_oid(blob_oid, manifest_path)
         return nil unless content
 
         result = Bibliothecary.analyse_file(manifest_path, content).first
+        result = nil if result && Config.filter_ecosystem?(result[:platform])
         @blob_cache[cache_key] = { result: result, hits: 0 }
         result
       end

lib/git/pkgs/commands/diff_driver.rb

@@ -42,6 +42,7 @@ class DiffDriver
         def initialize(args)
           @args = args
           @options = parse_options
+          Config.configure_bibliothecary
         end
 
         def run
@@ -132,6 +133,7 @@ def parse_deps(path, content)
 
           result = Bibliothecary.analyse_file(path, content).first
           return {} unless result
+          return {} if Config.filter_ecosystem?(result[:platform])
 
           result[:dependencies].map { |d| [d[:name], d] }.to_h
         rescue StandardError

lib/git/pkgs/commands/info.rb

@@ -12,6 +12,11 @@ def initialize(args)
         end
 
         def run
+          if @options[:ecosystems]
+            output_ecosystems
+            return
+          end
+
           repo = Repository.new
           require_database(repo)
 
@@ -77,6 +82,61 @@ def run
           end
         end
 
+        def output_ecosystems
+          require "bibliothecary"
+
+          all_ecosystems = Bibliothecary::Parsers.constants.map do |c|
+            parser = Bibliothecary::Parsers.const_get(c)
+            parser.platform_name if parser.respond_to?(:platform_name)
+          end.compact.sort
+
+          configured = Config.ecosystems
+          filtering = configured.any?
+
+          puts "Available Ecosystems"
+          puts "=" * 40
+          puts
+
+          enabled_ecos = []
+          disabled_ecos = []
+
+          all_ecosystems.each do |eco|
+            if Config.filter_ecosystem?(eco)
+              remote = Config.remote_ecosystem?(eco)
+              disabled_ecos << { name: eco, remote: remote }
+            else
+              enabled_ecos << eco
+            end
+          end
+
+          puts "Enabled:"
+          if enabled_ecos.any?
+            enabled_ecos.each { |eco| puts "  #{Color.green(eco)}" }
+          else
+            puts "  (none)"
+          end
+
+          puts
+          puts "Disabled:"
+          if disabled_ecos.any?
+            disabled_ecos.each do |eco|
+              suffix = eco[:remote] ? " (remote)" : ""
+              puts "  #{eco[:name]}#{suffix}"
+            end
+          else
+            puts "  (none)"
+          end
+
+          puts
+          if filtering
+            puts "Filtering: only #{configured.join(', ')}"
+          else
+            puts "All local ecosystems enabled"
+          end
+          puts "Remote ecosystems require explicit opt-in"
+          puts "Configure with: git config --add pkgs.ecosystems <name>"
+        end
+
         def format_size(bytes)
           units = %w[B KB MB GB]
           unit_index = 0
@@ -94,7 +154,11 @@ def parse_options
           options = {}
 
           parser = OptionParser.new do |opts|
-            opts.banner = "Usage: git pkgs info"
+            opts.banner = "Usage: git pkgs info [options]"
+
+            opts.on("--ecosystems", "Show available ecosystems and filter status") do
+              options[:ecosystems] = true
+            end
 
             opts.on("-h", "--help", "Show this help") do
               puts opts

lib/git/pkgs/config.rb

@@ -0,0 +1,73 @@
+# frozen_string_literal: true
+
+require "bibliothecary"
+
+module Git
+  module Pkgs
+    module Config
+      # Ecosystems that require remote parsing services - disabled by default
+      REMOTE_ECOSYSTEMS = %w[carthage clojars hackage hex swiftpm].freeze
+
+      # File patterns ignored by default (SBOM formats not supported)
+      DEFAULT_IGNORED_FILES = %w[
+        cyclonedx.xml
+        cyclonedx.json
+        *.cdx.xml
+        *.cdx.json
+        *.spdx
+        *.spdx.json
+      ].freeze
+
+      def self.ignored_dirs
+        @ignored_dirs ||= read_config_list("pkgs.ignoredDirs")
+      end
+
+      def self.ignored_files
+        @ignored_files ||= read_config_list("pkgs.ignoredFiles")
+      end
+
+      def self.ecosystems
+        @ecosystems ||= read_config_list("pkgs.ecosystems")
+      end
+
+      def self.configure_bibliothecary
+        dirs = ignored_dirs
+        files = DEFAULT_IGNORED_FILES + ignored_files
+
+        Bibliothecary.configure do |config|
+          config.ignored_dirs += dirs unless dirs.empty?
+          config.ignored_files += files
+        end
+      end
+
+      def self.filter_ecosystem?(platform)
+        platform_lower = platform.to_s.downcase
+
+        # Remote ecosystems are disabled unless explicitly enabled
+        if REMOTE_ECOSYSTEMS.include?(platform_lower)
+          return !ecosystems.map(&:downcase).include?(platform_lower)
+        end
+
+        # If no filter configured, allow all non-remote ecosystems
+        return false if ecosystems.empty?
+
+        # Otherwise, only allow explicitly listed ecosystems
+        !ecosystems.map(&:downcase).include?(platform_lower)
+      end
+
+      def self.remote_ecosystem?(platform)
+        REMOTE_ECOSYSTEMS.include?(platform.to_s.downcase)
+      end
+
+      def self.reset!
+        @ignored_dirs = nil
+        @ignored_files = nil
+        @ecosystems = nil
+      end
+
+      def self.read_config_list(key)
+        `git config --get-all #{key} 2>/dev/null`.split("\n").map(&:strip).reject(&:empty?)
+      end
+    end
+  end
+end