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guards.mjs
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guards.mjs
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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import { getCtx } from './als.mjs'
export function quote(arg) {
if (/^[a-z0-9/_.-]+$/i.test(arg) || arg === '') {
return arg
}
return (
`$'` +
arg
.replace(/\\/g, '\\\\')
.replace(/'/g, "\\'")
.replace(/\f/g, '\\f')
.replace(/\n/g, '\\n')
.replace(/\r/g, '\\r')
.replace(/\t/g, '\\t')
.replace(/\v/g, '\\v')
.replace(/\0/g, '\\0') +
`'`
)
}
export function formatCmd(pieces, ...args) {
let cmd = pieces[0],
i = 0
let quote = getCtx().quote
while (i < args.length) {
let s
if (Array.isArray(args[i])) {
s = args[i].map((x) => quote(substitute(x))).join(' ')
} else {
s = quote(substitute(args[i]))
}
cmd += s + pieces[++i]
}
return cmd
}
function substitute(arg) {
if (arg?.stdout) {
return arg.stdout.replace(/\n$/, '')
}
return `${arg}`
}