#!/usr/bin/env bash

# SPDX-License-Identifier: MPL-2.0

# fix-atom-exhaustion.sh — Replace String.to_atom with String.to_existing_atom

# Recipe: recipe-atom-exhaustion (confidence: 0.90, auto_fixable: true)

#

# Prevents BEAM atom table exhaustion by ensuring only pre-existing atoms

# are referenced from user input.

#

# Usage: fix-atom-exhaustion.sh <repo-path> [--file <specific-file>]

set -euo pipefail

REPO="${1:?Usage: fix-atom-exhaustion.sh <repo-path>}"

SPECIFIC_FILE="${3:-}"

FIXES=0

fix_file() {

local file="$1"

[[ "$file" == */.git/* ]] && return 0

[[ "$file" == */_build/* ]] && return 0

[[ "$file" == */deps/* ]] && return 0

local count

count=$(grep -c 'String\.to_atom\b' "$file" 2>/dev/null || echo 0)

[[ "$count" -eq 0 ]] && return 0

sed -i 's/String\.to_atom\b/String.to_existing_atom/g' "$file"

echo "[fix-atom-exhaustion] Replaced ${count} String.to_atom → String.to_existing_atom in ${file}"

FIXES=$((FIXES + count))

}

if [[ -n "$SPECIFIC_FILE" ]]; then

fix_file "$SPECIFIC_FILE"

else

while IFS= read -r -d '' file; do

fix_file "$file"

done < <(find "$REPO" -type f \( -name "*.ex" -o -name "*.exs" \) \

-not -path "*/.git/*" -not -path "*/_build/*" -not -path "*/deps/*" \

-print0 2>/dev/null)

fi

echo "[fix-atom-exhaustion] Total: ${FIXES} replacement(s)"