adapted https://github.com/denoland/deno_install/blob/master/install.py…

… for nsc installation

.goreleaser.yml

@@ -19,14 +19,16 @@ builds:
 dist: build
 
 archive:
-  wrap_in_directory: true
-  name_template: '{{ .ProjectName }}-{{ .Os }}-{{ .Arch }}{{ if .Arm
-    }}v{{ .Arm }}{{ end }}'
+  wrap_in_directory: false
+  name_template: '{{ .ProjectName }}-{{ .Os }}-{{ .Arch }}{{ if .Arm }}v{{ .Arm }}{{ end }}'
   format: zip
+  files:
+    - none*
 
 checksum:
   name_template: '{{ .ProjectName }}-checksums.txt'
 
 snapshot:
   name_template: 'dev'
 
+

install.py

@@ -0,0 +1,137 @@
+#!/usr/bin/env python
+
+# Copyright 2018 The NATS Authors
+# 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
+#
+# http://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.
+#
+# This installer mostly inspired by
+# https://github.com/denoland/deno_install/blob/master/install.py
+
+from __future__ import print_function
+
+import io
+import os
+import re
+import sys
+import zipfile
+import zlib
+
+try:
+    from urllib.request import urlopen
+except ImportError:
+    from urllib2 import urlopen
+
+NSC_REPO_URL = "https://github.com/nats-io/nsc"
+LATEST_RELEASE_URL = NSC_REPO_URL + "/releases/latest"
+TAG_URL = NSC_REPO_URL + "/releases/tag/"
+FILENAME_LOOKUP = {
+    "darwin": "nsc-darwin-amd64.zip",
+    "linux": "nsc-linux-amd64.zip",
+    "win32": "nsc-windows-amd64.zip"
+}
+
+
+def release_url(platform, tag):
+    try:
+        filename = FILENAME_LOOKUP[platform]
+    except KeyError:
+        print("Unable to locate appropriate filename for", platform)
+        sys.exit(1)
+
+    url = TAG_URL + tag if tag else LATEST_RELEASE_URL
+
+    try:
+        html = urlopen(url).read().decode('utf-8')
+    except:
+        print("Unable to find release page for", tag)
+        sys.exit(1)
+
+    urls = re.findall(r'href=[\'"]?([^\'" >]+)', html)
+    matching = [u for u in urls if filename in u]
+
+    if len(matching) != 1:
+        print("Unable to find download url for", filename)
+        sys.exit(1)
+
+    return "https://github.com" + matching[0]
+
+
+def download_with_progress(url):
+    print("Downloading", url)
+
+    remote_file = urlopen(url)
+    total_size = int(remote_file.headers['Content-Length'].strip())
+
+    data = []
+    bytes_read = 0.0
+
+    while True:
+        d = remote_file.read(8192)
+
+        if not d:
+            print()
+            break
+
+        bytes_read += len(d)
+        data.append(d)
+        sys.stdout.write('\r%2.2f%% downloaded' % (bytes_read / total_size * 100))
+        sys.stdout.flush()
+
+    return b''.join(data)
+
+
+def main():
+    bin_dir = nsc_bin_dir()
+    exe_fn = os.path.join(bin_dir, "nsc")
+
+    url = release_url(sys.platform, sys.argv[1] if len(sys.argv) > 1 else None)
+    compressed = download_with_progress(url)
+
+    if url.endswith(".zip"):
+        with zipfile.ZipFile(io.BytesIO(compressed), 'r') as z:
+            with open(exe_fn, 'wb+') as exe:
+                if "windows" not in url:
+                    exe.write(z.read('nsc'))
+                else:
+                    exe.write(z.read('nsc.exe'))
+    else:
+        # Note: gzip.decompress is not available in python2.
+        content = zlib.decompress(compressed, 15 + 32)
+        with open(exe_fn, 'wb+') as exe:
+            exe.write(content)
+    os.chmod(exe_fn, 0o744)
+
+    print("NSC: " + exe_fn)
+    print("Now manually add %s to your $PATH" % bin_dir)
+    print("Example:")
+    print()
+    print("  echo export PATH=\"%s\":\\$PATH >> $HOME/.bash_profile" % bin_dir)
+    print()
+
+
+def mkdir(d):
+    if not os.path.exists(d):
+        print("mkdir", d)
+        os.mkdir(d)
+
+
+def nsc_bin_dir():
+    home = os.path.expanduser("~")
+    nsccli = os.path.join(home, ".nsccli")
+    mkdir(nsccli)
+    bin_dir = os.path.join(nsccli, "bin")
+    mkdir(bin_dir)
+    return bin_dir
+
+
+if __name__ == '__main__':
+    main()