feat: add options.os to set %_target_os (#175)

* Add option to set %_target_os

* test: correctly assert target_os

* fix: use process.platform instead of OS module

Co-authored-by: Felipe Castillo <fcastillo.ec@gmail.com>

README.md

@@ -275,6 +275,12 @@ Default: `undefined`
 
 Machine architecture the package is targeted to, used to set the `--target` option.
 
+#### options.os
+Type: `String`
+Default: Operating system platform of the host machine
+
+Operating system platform the package is targeted to, used to set the `--target` option.
+
 #### options.requires
 Type: `Array[String]`
 Default: The minimum list of packages needed for Electron to run

src/installer.js

@@ -59,7 +59,7 @@ class RedhatInstaller extends common.ElectronInstaller {
   async createPackage () {
     this.options.logger(`Creating package at ${this.stagingDir}`)
 
-    const output = await spawn('rpmbuild', ['-bb', this.specPath, '--target', this.options.arch, '--define', `_topdir ${this.stagingDir}`], this.options.logger)
+    const output = await spawn('rpmbuild', ['-bb', this.specPath, '--target', `${this.options.arch}-${this.options.vendor}-${this.options.os}`, '--define', `_topdir ${this.stagingDir}`], this.options.logger)
     this.options.logger(`rpmbuild output: ${output}`)
   }
 
@@ -126,6 +126,9 @@ class RedhatInstaller extends common.ElectronInstaller {
     this.options.requires = common.mergeUserSpecified(this.userSupplied, 'requires', this.defaults)
 
     this.normalizeVersion()
+
+    this.options.vendor = 'none'
+    this.options.os = this.options.os || process.platform
   }
 
   /**

test/installer.js

@@ -144,4 +144,43 @@ describe('module', function () {
       }
     }
   )
+
+  describeInstaller(
+    'with an app with default %_target_os',
+    {
+      src: 'test/fixtures/app-with-asar/',
+      options: {
+        arch: 'x86'
+      }
+    },
+    'generates a `.rpm` package with default %_target_os',
+    async outputDir => {
+      await assertASARRpmExists(outputDir)
+      const stdout = await spawn('rpm', ['-qp', '--qf', '%{OS}', 'footest.x86.rpm'], { cwd: outputDir })
+      if (stdout !== process.platform) {
+        throw new Error(`RPM built with wrong platform: ${stdout}`)
+      }
+    }
+  )
+
+  if (process.platform === 'darwin') {
+    describeInstaller(
+      'with an app with %_target_os linux',
+      {
+        src: 'test/fixtures/app-with-asar/',
+        options: {
+          arch: 'x86',
+          os: 'linux'
+        }
+      },
+      'generates a `.rpm` package with linux %_target_os',
+      async outputDir => {
+        await assertASARRpmExists(outputDir)
+        const stdout = await spawn('rpm', ['-qp', '--qf', '%{OS}', 'footest.x86.rpm'], { cwd: outputDir })
+        if (stdout !== 'linux') {
+          throw new Error(`RPM was not built for linux: ${stdout}`)
+        }
+      }
+    )
+  }
 })