Initial commit

commands/commit-error-handling/.scripts/changes-detector.sh

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+#!/usr/bin/env bash
+# ================================================================
+# Script: changes-detector.sh
+# Purpose: Check for changes to commit (staged, unstaged, untracked)
+# Version: 1.0.0
+# Usage: ./changes-detector.sh
+# Returns: JSON with change counts
+# Exit Codes:
+#   0 = Success (with or without changes)
+#   1 = Not a git repository
+#   2 = Script error
+# ================================================================
+
+set -euo pipefail
+
+# Function to output JSON
+output_json() {
+    local has_changes=$1
+    local staged=$2
+    local unstaged=$3
+    local untracked=$4
+    local total=$5
+
+    cat <<EOF
+{
+  "has_changes": $has_changes,
+  "staged_count": $staged,
+  "unstaged_count": $unstaged,
+  "untracked_count": $untracked,
+  "total_changes": $total,
+  "checked_at": "$(date -Iseconds)"
+}
+EOF
+}
+
+# Main logic
+main() {
+    # Verify we're in a git repository
+    if ! git rev-parse --git-dir &>/dev/null; then
+        output_json false 0 0 0 0
+        exit 1
+    fi
+
+    # Count staged changes (added to index)
+    STAGED_COUNT=$(git diff --cached --numstat | wc -l)
+
+    # Count unstaged changes (modified but not staged)
+    UNSTAGED_COUNT=$(git diff --numstat | wc -l)
+
+    # Count untracked files
+    UNTRACKED_COUNT=$(git ls-files --others --exclude-standard | wc -l)
+
+    # Total changes
+    TOTAL=$((STAGED_COUNT + UNSTAGED_COUNT + UNTRACKED_COUNT))
+
+    # Determine if there are any changes
+    if [ "$TOTAL" -gt 0 ]; then
+        HAS_CHANGES=true
+    else
+        HAS_CHANGES=false
+    fi
+
+    # Output JSON
+    output_json "$HAS_CHANGES" "$STAGED_COUNT" "$UNSTAGED_COUNT" "$UNTRACKED_COUNT" "$TOTAL"
+
+    exit 0
+}
+
+# Run main function
+main "$@"