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Validate command line args

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This commit is contained in:
Sami Samhuri 2019-12-04 17:19:18 -08:00
parent 4a03060c8c
commit 9173a09d88
1 changed files with 27 additions and 3 deletions
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30
SiteGenerator/Sources/SiteGenerator/main.swift
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@ -5,6 +5,7 @@
// Created by Sami Samhuri on 2019-12-01.
//
import Darwin
import Foundation
func main(sourcePath: String, targetPath: String) throws {
@ -18,9 +19,32 @@ func main(sourcePath: String, targetPath: String) throws {
try generator.generate(targetURL: targetURL)
}
guard CommandLine.arguments.count >= 3 else {
let name = CommandLine.arguments[0]
fputs("Usage: \(name) <site dir> <target dir>", stderr)
exit(1)
}
let sourcePath = CommandLine.arguments[1]
var isDir: ObjCBool = false
let sourceExists = FileManager.default.fileExists(atPath: sourcePath, isDirectory: &isDir)
guard sourceExists, isDir.boolValue else {
fputs("error: Site path \(sourcePath) does not exist or is not a directory", stderr)
exit(2)
}
let targetPath = CommandLine.arguments[2]
let targetExists = FileManager.default.fileExists(atPath: targetPath)
guard !targetExists else {
print("error: Refusing to clobber existing target \(targetPath)")
exit(2)
}
#warning("TODO: validate args")
try! main(sourcePath: sourcePath, targetPath: targetPath)
do {
try main(sourcePath: sourcePath, targetPath: targetPath)
exit(0)
}
catch {
fputs("error: \(error.localizedDescription)", stderr)
exit(-1)
}