Function unquote

internal/cbm/extract_env_accesses.c:17–35

Unquote a string literal: "foo" -> foo, 'foo' -> foo

// Unquote a string literal: "foo" -> foo, 'foo' -> foo
static const char *unquote(CBMArena *a, const char *s) {
    if (!s || !s[0]) {
        return NULL;
    }
    // Trim whitespace
    while (*s == ' ' || *s == '\t') {
        s++;
    }
    size_t len = strlen(s);
    if (len >= CBM_QUOTE_PAIR) {
        char first = s[0];
        char last = s[len - CBM_QUOTE_OFFSET];
        if ((first == '"' && last == '"') || (first == '\'' && last == '\'') ||
            (first == '`' && last == '`')) {
            return cbm_arena_strndup(a, s + CBM_QUOTE_OFFSET, len - CBM_QUOTE_PAIR);
        }
    }
    return s;
}

// Extract env key from a function call like os.Getenv("KEY").
static const char *extract_env_key_from_call(CBMExtractCtx *ctx, TSNode node,