re-order install process to fail early

compile.ts

@@ -18,6 +18,6 @@ for (const target of targets) {
         '--include', 'src/snapper-template.txt',
         '--include', 'src/snapper@.service',
         '--output', 'dist/snapback-'+target,
-        'src/main.ts'
+        '--permission-set','src/main.ts'
     )
 }

deno.json

@@ -1,4 +1,11 @@
 {
     "$schema": "https://raw.githubusercontent.com/denoland/deno/refs/heads/main/cli/schemas/config-file.v1.json",
-    "nodeModulesDir":"none"
+    "nodeModulesDir": "none",
+    "compile": {
+        "permissions": {
+            "read": true,
+            "write": true,
+            "run": ["tar","chmod"]
+        }
+    }
 }

src/main.ts

@@ -34,13 +34,13 @@ program.command('*').description('snapback ignores unknown commands')
 
 program.command('install').description('installs snapback on your system')
     .action(function () {
-        let lib_snapper = '/usr/libexec/snapper'
-        if (!fs.existsSync(lib_snapper)) lib_snapper = '/usr/lib/snapper'
-        console.debug(`${import.meta.url} will be moved to ${lib_snapper}/99-snapback`)
         const template = fs.readFileSync(import.meta.dirname + '/snapper-template.txt')
         const service = fs.readFileSync(import.meta.dirname + '/snapper@.service')
-        fs.writeFileSync('/etc/systemd/system/snapper@.service', service, 'utf8')
+        let lib_snapper = '/usr/libexec/snapper'
+        if (!fs.existsSync(lib_snapper)) lib_snapper = '/usr/lib/snapper'
+        if (!fs.existsSync('/etc/snapper/config-templates')) fs.mkdirSync('/etc/snapper/config-templates')
         fs.writeFileSync('/etc/snapper/config-templates/snapback', template, 'utf8')
+        fs.writeFileSync('/etc/systemd/system/snapper@.service', service, 'utf8')
         fs.mkdirSync(lib_snapper + '/plugins', { recursive: true })
         fs.renameSync(import.meta.url, lib_snapper + '/plugins/99-snapback')
         sugoiSpawn('chmod', '+x', lib_snapper + '/plugins/99-snapback')