fix(wp-migration): parse table_prefix correctly, not as ';' (closes #25) (#26)

The previous parser used `sed "s/.*'//; s/'.*//"` which is greedy: for
a normal line `$table_prefix = 'wp_';`, the first sed matches up to and
including the closing single-quote, leaving just `;`. This broke step
6 silently — the URL-update query became `SELECT ... FROM ;options`,
mysql errored out under suppressed stderr, and the staging URL never
applied to the destination database.

Switch to `awk -F"'" '/^\$table_prefix[[:space:]]*=/ {print $2; exit}'`
which is robust against whitespace variants and unaffected by the
greedy-matching pitfall. Add empty-check and `[A-Za-z0-9_]+` validation
since the prefix is interpolated unquoted into SQL during step 6.

Bumps VERSION to 0.0.1.3.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: khoipro

CHANGELOG.md

@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
 
+## [0.0.1.3] - 2026-05-02
+
+### Fixed
+
+- `wp-migration.sh`: `$table_prefix` is now parsed correctly. The previous `sed "s/.*'//; s/'.*//"` was greedy and captured the trailing `;` instead of the prefix value, producing `prefix: ;` in logs and silently breaking step 6 (URL update would query `;options` and fail). Replaced with `awk -F"'"` + validation that the prefix matches `[A-Za-z0-9_]+` (#25).
+
 ## [0.0.1.2] - 2026-05-02
 
 ### Fixed

VERSION

@@ -1 +1 @@
-0.0.1.2
+0.0.1.3

wp-migration.sh

@@ -207,15 +207,28 @@ DB_USER=$(extract_wp_config "DB_USER")
 DB_PASS=$(extract_wp_config "DB_PASSWORD")
 DB_HOST=$(extract_wp_config "DB_HOST")
 
-# Read table prefix
-TABLE_PREFIX=$(grep '^\$table_prefix' "$SRC_PATH/wp-config.php" \
-  | sed "s/.*'//; s/'.*//" || echo "wp_")
+# Read table prefix. wp-config.php convention: $table_prefix = 'wp_';
+# Split the line on single-quotes and take the second field — robust across
+# whitespace variations and avoids the greedy `.*'` sed pitfall that captured
+# the trailing semicolon.
+TABLE_PREFIX=$(awk -F"'" '/^\$table_prefix[[:space:]]*=/ {print $2; exit}' "$SRC_PATH/wp-config.php")
 
 if [ -z "$DB_NAME" ] || [ -z "$DB_USER" ] || [ -z "$DB_PASS" ]; then
   error "Could not read DB credentials from wp-config.php"
   exit 1
 fi
 
+if [ -z "$TABLE_PREFIX" ]; then
+  error "Could not parse \$table_prefix from $SRC_PATH/wp-config.php"
+  exit 1
+fi
+
+# Validate the prefix — used unquoted in SQL queries during step 6
+if ! [[ "$TABLE_PREFIX" =~ ^[A-Za-z0-9_]+$ ]]; then
+  error "Invalid table prefix: '$TABLE_PREFIX' (must match [A-Za-z0-9_]+)"
+  exit 1
+fi
+
 info "Source: $SRC_PATH"
 info "Destination: $DEST_USER@$DEST_HOST:$DEST_PATH (port $DEST_PORT)"
 info "Database: $DB_NAME (prefix: $TABLE_PREFIX)"