feat(prereceive): add commit validation and statistics tracking

hooks/pre-recieve.sh

@@ -16,9 +16,62 @@ RED='\033[0;31m'
 GREEN='\033[0;32m'
 YELLOW='\033[0;33m'
 BLUE='\033[0;34m'
+MAGENTA='\033[0;35m'
+CYAN='\033[0;36m'
+BOLD='\033[1m'
 NC='\033[0m' # No Color
 
+# Statistics tracking
 INVALID_COMMITS=0
+VALID_COMMITS=0
+MERGE_COMMITS=0
+TOTAL_COMMITS=0
+
+# Track commit types for summary
+declare -A COMMIT_TYPES=(
+    ["feat"]=0 ["fix"]=0 ["docs"]=0 ["style"]=0 ["refactor"]=0
+    ["test"]=0 ["perf"]=0 ["build"]=0 ["ci"]=0 ["chore"]=0 ["revert"]=0
+)
+
+# Track authors
+declare -A AUTHORS=()
+
+# Track files changed
+TOTAL_FILES_CHANGED=0
+TOTAL_INSERTIONS=0
+TOTAL_DELETIONS=0
+
+# Function to draw a horizontal bar
+draw_bar() {
+    local value=$1
+    local max=$2
+    local width=30
+    local bar_width=$((value * width / max))
+
+    # Ensure minimum width of 1 if value > 0
+    if [ "$value" -gt 0 ] && [ "$bar_width" -eq 0 ]; then
+        bar_width=1
+    fi
+
+    printf "[%${bar_width}s%$((width - bar_width))s] %d\n" | tr ' ' '#' | tr ' ' '.'
+}
+
+# Function to extract commit type
+get_commit_type() {
+    local subject="$1"
+    echo "$subject" | grep -oP '^(feat|fix|docs|style|refactor|test|perf|build|ci|chore|revert)' || echo "unknown"
+}
+
+# ASCII box drawing for commit stats
+draw_box() {
+    local title="$1"
+    local width=60
+    local padding=$(((width - ${#title}) / 2))
+
+    echo -e "${BOLD}┌$(printf '─%.0s' $(seq 1 $width))┐${NC}"
+    echo -e "${BOLD}│$(printf ' %.0s' $(seq 1 $padding))$title$(printf ' %.0s' $(seq 1 $((width - padding - ${#title}))))│${NC}"
+    echo -e "${BOLD}└$(printf '─%.0s' $(seq 1 $width))┘${NC}"
+}
 
 # Read stdin (format: <old-value> <new-value> <ref-name>)
 while read -r OLD_REV NEW_REV REF_NAME; do
@@ -34,33 +87,133 @@ while read -r OLD_REV NEW_REV REF_NAME; do
 
     echo -e "${YELLOW}Checking commits in $REF_NAME${NC}"
 
+    # Get branch stats from git
+    BRANCH_COMMITS=$(git rev-list --count "$REF_NAME")
+    BRANCH_AGE=$(git log -1 --format="%cr" "$REF_NAME")
+
+    echo -e "${CYAN}→ Branch has $BRANCH_COMMITS total commits (created $BRANCH_AGE)${NC}"
+    echo ""
+
     # Get all commit hashes between old and new revision
     COMMITS=$(git rev-list "$OLD_REV".."$NEW_REV")
 
     # Check each commit message
     for COMMIT in $COMMITS; do
+        TOTAL_COMMITS=$((TOTAL_COMMITS + 1))
         COMMIT_MSG=$(git log --format=%B -n 1 "$COMMIT")
         COMMIT_SUBJECT=$(echo "$COMMIT_MSG" | head -n 1)
         PARENT_COUNT=$(git rev-list --parents -n 1 "$COMMIT" | awk '{print NF - 1}')
+        AUTHOR=$(git log -1 --format="%an" "$COMMIT")
+        COMMIT_DATE=$(git log -1 --format="%cd" --date=relative "$COMMIT")
+        SHORT_HASH=${COMMIT:0:8}
+
+        # Get commit stats
+        STATS=$(git show --stat --format="" "$COMMIT")
+        FILES_CHANGED=$(echo "$STATS" | grep -c "^[ ]*")
+        INSERTIONS=$(echo "$STATS" | grep -o '[0-9]* insertion' | cut -d' ' -f1 | awk '{sum+=$1} END {print sum+0}')
+        DELETIONS=$(echo "$STATS" | grep -o '[0-9]* deletion' | cut -d' ' -f1 | awk '{sum+=$1} END {print sum+0}')
+
+        # Update stats
+        TOTAL_FILES_CHANGED=$((TOTAL_FILES_CHANGED + FILES_CHANGED))
+        TOTAL_INSERTIONS=$((TOTAL_INSERTIONS + INSERTIONS))
+        TOTAL_DELETIONS=$((TOTAL_DELETIONS + DELETIONS))
+
+        # Update author stats
+        if [[ -n "${AUTHORS[$AUTHOR]}" ]]; then
+            AUTHORS[$AUTHOR]=$((AUTHORS[$AUTHOR] + 1))
+        else
+            AUTHORS[$AUTHOR]=1
+        fi
+
+        echo -e "${MAGENTA}Commit #$TOTAL_COMMITS:${NC} ${BOLD}$SHORT_HASH${NC} (by $AUTHOR, $COMMIT_DATE)"
+        echo -e "  Changed: ${CYAN}$FILES_CHANGED files${NC} ${GREEN}+$INSERTIONS${NC}/${RED}-$DELETIONS${NC} lines"
+        echo "  $COMMIT_SUBJECT"
 
         # Skip validation for merge commits (both PR merges and standard Git merges)
         if [[ $PARENT_COUNT -gt 1 ]] && ([[ "$COMMIT_SUBJECT" =~ $PR_MERGE_PATTERN ]] || [[ "$COMMIT_SUBJECT" =~ $GIT_MERGE_PATTERN ]]); then
-            echo -e "${BLUE}➜ Skipping merge commit:${NC} $COMMIT_SUBJECT"
+            echo -e "  ${BLUE}➜ Skipping merge commit validation${NC}"
+            MERGE_COMMITS=$((MERGE_COMMITS + 1))
             continue
         fi
 
         if ! [[ "$COMMIT_SUBJECT" =~ $PATTERN ]]; then
-            echo -e "${RED}✗ Invalid commit message:${NC} $COMMIT_SUBJECT"
+            echo -e "  ${RED}✗ Invalid commit message${NC}"
-            echo -e "${RED}  Commit:${NC} $COMMIT"
+            echo -e "  ${YELLOW}  Should follow pattern:${NC} type(scope): message"
-            echo -e "${YELLOW}  Message should follow semantic commit format:${NC}"
-            echo -e "  type(scope): message"
-            echo -e "  ${YELLOW}where type is one of:${NC} feat, fix, docs, style, refactor, test, perf, build, ci, chore, revert"
-            echo ""
             INVALID_COMMITS=$((INVALID_COMMITS + 1))
         else
-            echo -e "${GREEN}✓ Valid commit:${NC} $COMMIT_SUBJECT"
+            echo -e "  ${GREEN}✓ Valid semantic commit${NC}"
+            VALID_COMMITS=$((VALID_COMMITS + 1))
+
+            # Count commit type
+            COMMIT_TYPE=$(get_commit_type "$COMMIT_SUBJECT")
+            if [[ -n "${COMMIT_TYPES[$COMMIT_TYPE]}" ]]; then
+                COMMIT_TYPES[$COMMIT_TYPE]=$((COMMIT_TYPES[$COMMIT_TYPE] + 1))
+            fi
         fi
+
+        echo ""
     done
+
+    # Add push summary
+    draw_box "COMMIT STATISTICS"
+    echo -e "${BOLD}Total commits in this push:${NC} $TOTAL_COMMITS"
+    echo -e "${GREEN}Valid semantic commits:   ${NC} $VALID_COMMITS"
+    echo -e "${BLUE}Merge commits:           ${NC} $MERGE_COMMITS"
+    echo -e "${RED}Invalid commits:         ${NC} $INVALID_COMMITS"
+    echo ""
+
+    if [ $TOTAL_COMMITS -gt 0 ]; then
+        VALID_PERCENT=$(((VALID_COMMITS + MERGE_COMMITS) * 100 / TOTAL_COMMITS))
+        echo -e "${BOLD}Semantic compliance:${NC} $VALID_PERCENT%"
+
+        # Print bar
+        printf "["
+        for ((i = 0; i < VALID_PERCENT / 5; i++)); do
+            printf "${GREEN}#${NC}"
+        done
+        for ((i = VALID_PERCENT / 5; i < 20; i++)); do
+            printf "${RED}.${NC}"
+        done
+        printf "] $VALID_PERCENT%%\n"
+        echo ""
+    fi
+
+    # Commit type distribution if we have valid commits
+    if [ $VALID_COMMITS -gt 0 ]; then
+        draw_box "COMMIT TYPE DISTRIBUTION"
+        for type in "${!COMMIT_TYPES[@]}"; do
+            count=${COMMIT_TYPES[$type]}
+            if [ $count -gt 0 ]; then
+                # Calculate percentage
+                percent=$((count * 100 / VALID_COMMITS))
+                printf "%-10s " "$type:"
+                draw_bar $count $VALID_COMMITS
+                echo " $count ($percent%)"
+            fi
+        done
+        echo ""
+    fi
+
+    # Author distribution
+    if [ ${#AUTHORS[@]} -gt 0 ]; then
+        draw_box "AUTHOR DISTRIBUTION"
+        for author in "${!AUTHORS[@]}"; do
+            count=${AUTHORS[$author]}
+            percent=$((count * 100 / TOTAL_COMMITS))
+            printf "%-20s " "$author:"
+            draw_bar $count $TOTAL_COMMITS
+            echo " $count ($percent%)"
+        done
+        echo ""
+    fi
+
+    # File stats
+    draw_box "CHANGE STATISTICS"
+    echo -e "Files changed:   $TOTAL_FILES_CHANGED"
+    echo -e "Lines added:     ${GREEN}+$TOTAL_INSERTIONS${NC}"
+    echo -e "Lines removed:   ${RED}-$TOTAL_DELETIONS${NC}"
+    echo -e "Net change:      $((TOTAL_INSERTIONS - TOTAL_DELETIONS)) lines"
+    echo ""
 done
 
 # If any commits were invalid, reject the push
@@ -68,7 +221,7 @@ if [[ $INVALID_COMMITS -gt 0 ]]; then
     echo -e "${RED}Push rejected: $INVALID_COMMITS commit(s) have invalid messages.${NC}"
     echo -e "${YELLOW}Please rewrite your commit messages to follow the semantic commit format:${NC}"
     echo "type(scope): message"
-    echo "Examples:"
+    echo -e "\nExamples:"
     echo "  feat(auth): add login with Google"
     echo "  fix: correct calculation in billing module"
     echo "  style(release.yml): format permissions section in YAML"