Add --tag-prefix option for github releases (#88)

README.md

@@ -35,6 +35,7 @@ prebuild-install [options]
   --runtime     -r  runtime     (Node runtime [node or electron] to build or install for, default is node)
   --path        -p  path        (make a prebuild-install here)
   --token       -T  gh-token    (github token for private repos)
+  --tag-prefix <prefix>         (github tag prefix, default is "v")
   --build-from-source           (skip prebuild download)
   --verbose                     (log verbosely)
   --libc                        (use provided libc rather than system default)

asset.js

@@ -28,7 +28,7 @@ function findAssetId (opts, cb) {
 
     // Find asset id in release
     for (var release of data) {
-      if (release.tag_name === 'v' + opts.pkg.version) {
+      if (release.tag_name === opts['tag-prefix'] + opts.pkg.version) {
         for (var asset of release.assets) {
           if (asset.browser_download_url === downloadUrl) {
             return cb(null, asset.id)

help.txt

@@ -5,6 +5,7 @@ prebuild-install [options]
   --runtime     -r  runtime     (Node runtime [node or electron] to build or install for, default is node)
   --path        -p  path        (make a prebuild-install here)
   --token       -T  gh-token    (github token for private repos)
+  --tag-prefix <prefix>         (github tag prefix, default is "v")
   --force                       (always use prebuilt binaries when available)
   --build-from-source           (skip prebuild download)
   --verbose                     (log verbosely)

rc.js

@@ -42,7 +42,8 @@ module.exports = function (pkg) {
     path: '.',
     proxy: env.npm_config_proxy || env['HTTP_PROXY'],
     'https-proxy': env.npm_config_https_proxy || env['HTTPS_PROXY'],
-    'local-address': env.npm_config_local_address
+    'local-address': env.npm_config_local_address,
+    'tag-prefix': 'v'
   }, minimist(process.argv, {
     alias: {
       target: 't',

test/asset-test.js

@@ -128,6 +128,7 @@ function getOpts () {
     platform: process.platform,
     arch: process.arch,
     path: __dirname,
-    token: 'TOKEN'
+    token: 'TOKEN',
+    'tag-prefix': 'v'
   }
 }

test/rc-test.js

@@ -36,6 +36,7 @@ test('custom config and aliases', function (t) {
     t.equal(rc.libc, 'testlibc', 'libc family')
     t.equal(rc.abi, '50', 'correct ABI')
     t.equal(rc.token, 'TOKEN', 'correct token')
+    t.equal(rc['tag-prefix'], 'v', 'correct default tag prefix')
     t.end()
   })
 })
@@ -102,6 +103,14 @@ test('use default ABI', function (t) {
   })
 })
 
+test('using --tag-prefix will set the tag prefix', function (t) {
+  var args = ['--tag-prefix @scoped/package@']
+  runRc(t, args.join(' '), {}, function (rc) {
+    t.equal(rc['tag-prefix'], '@scoped/package@', 'tag prefix should be set')
+    t.end()
+  })
+})
+
 function runRc (t, args, env, cb) {
   var cmd = 'node ' + path.resolve(__dirname, '..', 'rc.js') + ' ' + args
   env = Object.assign({}, process.env, env)