#!/bin/bash

# Directory to clone repos into
WORKDIR="cran_repos"
mkdir -p "$WORKDIR"
cd "$WORKDIR"

# GitHub API paginates results, so we loop through pages
PAGE=1
PER_PAGE=100
MATCHES=()

while :; do
    # Fetch a page of repos
    REPOS=$(curl -s "https://api.github.com/orgs/cran/repos?per_page=$PER_PAGE&page=$PAGE" | jq -r '.[].clone_url')
    [ -z "$REPOS" ] && break

    for REPO_URL in $REPOS; do
        REPO_NAME=$(basename "$REPO_URL" .git)
        # Skip if already cloned
        [ -d "$REPO_NAME" ] && continue
        git clone --depth 1 "$REPO_URL" "$REPO_NAME" >/dev/null 2>&1
        if [ -d "$REPO_NAME/src" ]; then
            # Search for Rinternals.h in src/
            if grep -r -q 'R_VERSION < R_Version(' "$REPO_NAME/src"; then
                echo "$REPO_NAME"
            fi
        fi
        # Clean up to save space
        rm -rf "$REPO_NAME"
    done

    PAGE=$((PAGE + 1))
done