bootstrap-vue-loader/lib/plugin.js

A Webpack plugin for automatic BootstrapVue components and directives importing, mainly for treeshaking

let vueLoaderPath
try {
    vueLoaderPath = require.resolve('vue-loader')
} catch (err) {}

function isVueLoader (use) {
    return use === 'vue-loader' ||
        use.ident === 'vue-loader-options' ||
        use.loader === 'vue-loader' ||
        (vueLoaderPath && use.loader === vueLoaderPath)
}

class BootstrapVueLoader {
    constructor (options) {
        this.options = options || {}
    }

    apply (compiler) {
        const  rules = compiler.options.module.rules

        // find the rule that applies to vue files
        const vueRuleIndex = rules.findIndex(rule => rule.use && rule.use.find(isVueLoader))
        const vueRule = rules[vueRuleIndex]

        if (!vueRule) {
            throw new Error(
                `[BootstrapVueLoader Error] No matching rule for vue-loader found.\n` +
                `Make sure there is at least one root-level rule that uses vue-loader.`
            )
        }

        vueRule.use.unshift({
            loader: require.resolve('./loader')
        })
    }
}

module.exports = BootstrapVueLoader