added kubens installer

kubens/README.md

@@ -0,0 +1,22 @@
+---
+title: kubens
+homepage: https://github.com/ahmetb/kubectx
+tagline: |
+  kubens: kubens is a utility to easily switch between Kubernetes namespaces.
+---
+
+### Updating `kubens`
+
+`webi kubens@stable`
+
+Use the `@beta` tag for pre-releases.
+
+## Cheat Sheet
+
+> `kubens` kubens helps you switch between Kubernetes namespaces
+
+To run kubens:
+
+```bash
+kubens
+```

kubens/install.ps1

@@ -0,0 +1,58 @@
+#!/usr/bin/env pwsh
+
+###################
+# Install kubens #
+###################
+
+# Every package should define these variables
+$pkg_cmd_name = "kubens"
+
+$pkg_dst_cmd = "$Env:USERPROFILE\.local\bin\kubens.exe"
+$pkg_dst = "$pkg_dst_cmd"
+
+$pkg_src_cmd = "$Env:USERPROFILE\.local\opt\kubens-v$Env:WEBI_VERSION\bin\kubens.exe"
+$pkg_src_bin = "$Env:USERPROFILE\.local\opt\kubens-v$Env:WEBI_VERSION\bin"
+$pkg_src_dir = "$Env:USERPROFILE\.local\opt\kubens-v$Env:WEBI_VERSION"
+$pkg_src = "$pkg_src_cmd"
+
+$pkg_download = "$Env:USERPROFILE\Downloads\$Env:WEBI_PKG_FILE"
+
+# Fetch archive
+IF (!(Test-Path -Path "$Env:USERPROFILE\Downloads\$Env:WEBI_PKG_FILE"))
+{
+    # TODO: arch detection
+    echo "Downloading kubens from $Env:WEBI_PKG_URL to $pkg_download"
+    & curl.exe -A -L "$Env:WEBI_UA" -fsSL "$Env:WEBI_PKG_URL" -o "$pkg_download.part"
+    & move "$pkg_download.part" "$pkg_download"
+}
+
+IF (!(Test-Path -Path "$pkg_src_cmd"))
+{
+    echo "Installing kubens"
+
+    # TODO: create package-specific temp directory
+    # Enter tmp
+    pushd .local\tmp
+
+        # Remove any leftover tmp cruft
+        Remove-Item -Path ".\kubens-v*" -Recurse -ErrorAction Ignore
+        Remove-Item -Path ".\kubens.exe" -Recurse -ErrorAction Ignore
+
+        # Unpack archive file into this temporary directory
+        # Windows BSD-tar handles zip. Imagine that.
+        echo "Unpacking $pkg_download"
+        & tar xf "$pkg_download"
+
+        # Settle unpacked archive into place
+        echo "Install Location: $pkg_src_cmd"
+        New-Item "$pkg_src_bin" -ItemType Directory -Force        
+        Move-Item -Path "kubens.exe" -Destination "$pkg_src_bin"
+
+    # Exit tmp
+    popd
+}
+
+echo "Copying into '$pkg_dst_cmd' from '$pkg_src_cmd'"
+Remove-Item -Path "$pkg_dst_cmd" -Recurse -ErrorAction Ignore
+Copy-Item -Path "$pkg_src" -Destination "$pkg_dst" -Recurse
+Remove-Item -Path "$pkg_src" -Recurse -ErrorAction Ignore

kubens/install.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+{
+    set -e
+    set -u
+
+    ###################
+    # Install kubens #
+    ###################
+
+    # Every package should define these 6 variables
+    pkg_cmd_name="kubens"
+
+    pkg_dst_cmd="$HOME/.local/bin/kubens"
+    pkg_dst="$pkg_dst_cmd"
+
+    pkg_src_cmd="$HOME/.local/opt/kubens-v$WEBI_VERSION/bin/kubens"
+    pkg_src_dir="$HOME/.local/opt/kubens-v$WEBI_VERSION"
+    pkg_src="$pkg_src_cmd"
+
+    # pkg_install must be defined by every package
+    pkg_install() {
+        # e.g. ~/.local/opt/kubens-v0.99.9/bin
+        mkdir -p "$(dirname $pkg_src_cmd)"
+
+        # mv ./kubens-*/kubens ~/.local/opt/kubens-v0.99.9/bin/kubens
+        mv kubens "$pkg_src_cmd"
+    }
+
+    # pkg_get_current_version is recommended, but (soon) not required
+    pkg_get_current_version() {
+        # 'kubens' has no version parameter
+        echo       
+    }
+
+}

kubens/releases.js

@@ -0,0 +1,24 @@
+'use strict';
+
+var github = require('../_common/github.js');
+var owner = 'ahmetb';
+var repo = 'kubectx';
+
+module.exports = function (request) {
+  return github(request, owner, repo).then(function (all) {
+    // remove kubectx, etc. from kubens list
+    all.releases = all.releases.filter(function (rel) {
+      return !/(\.txt)|(kubectx)|(kubectx_)$/i.test(rel.name);
+    });
+    return all;
+  });
+}; 
+
+if (module === require.main) {
+  module.exports(require('@root/request')).then(function (all) {
+    all = require('../_webi/normalize.js')(all);
+    // just select the first 5 for demonstration
+    all.releases = all.releases.slice(0, 5);
+    console.info(JSON.stringify(all, null, 2));
+  });
+}