Merge pull request profclems#560 from profclems/ch-posix-script

chore(scripts): make quick installer script POSIX sh compliant

README.md

@@ -95,16 +95,18 @@ Read the [documentation](https://glab.readthedocs.io/) for more information on t
 ## Installation
 Download a binary suitable for your OS at the [releases page](https://github.com/profclems/glab/releases/latest).
 
-### Quick Install (Bash)
+### Quick Install (shell)
+**Supported Platforms**: Linux and macOS
+
 You can install or update `glab` with:
-```bash
-curl -sL https://j.mp/glab-i | sudo bash
+```sh
+curl -sL https://j.mp/glab-cli | sudo sh
 ```
 or
-```bash
-curl -s https://raw.githubusercontent.com/profclems/glab/trunk/scripts/quick_install.sh | sudo bash
+```sh
+curl -s https://raw.githubusercontent.com/profclems/glab/trunk/scripts/install.sh | sudo sh
 ```
-*Installs into `usr/local/bin`*
+*Installs into `usr/bin`*
 
 **NOTE**: Please take care when running scripts in this fashion. Consider peaking at the install script itself and verify that it works as intended.
 

scripts/install.sh

@@ -0,0 +1,72 @@
+#!/bin/sh
+# Usage: [sudo] [BINDIR=/usr/local/bin] ./install.sh [<BINDIR>]
+#
+# Example:
+#     1. sudo ./install.sh /usr/local/bin
+#     2. sudo ./install.sh /usr/bin
+#     3. ./install.sh $HOME/usr/bin
+#     4. BINDIR=$HOME/usr/bin ./install.sh
+#
+# Default BINDIR=/usr/bin
+
+set -euf
+
+if [ -n "${DEBUG-}" ]; then
+    set -x
+fi
+
+: "${BINDIR:=/usr/bin}"
+
+if [ $# -gt 0 ]; then
+  BINDIR=$1
+fi
+
+_can_install() {
+  if [ ! -d "${BINDIR}" ]; then
+    mkdir -p "${BINDIR}" 2> /dev/null
+  fi
+  [ -d "${BINDIR}" ] && [ -w "${BINDIR}" ]
+}
+
+if ! _can_install && [ "$(id -u)" != 0 ]; then
+  printf "Run script as sudo\n"
+  exit 1
+fi
+
+if ! _can_install; then
+  printf -- "Can't install to %s\n" "${BINDIR}"
+  exit 1
+fi
+
+machine=$(uname -m)
+
+case $(uname -s) in
+    Linux)
+        os="Linux"
+        ;;
+    Darwin)
+        os="Darwin"
+        ;;
+    *)
+        printf "OS not supported\n"
+        exit 1
+        ;;
+esac
+
+printf "Fetching latest version\n"
+latest="$(curl -sL 'https://api.github.com/repos/profclems/glab/releases/latest' | grep 'tag_name' | grep --only 'v[0-9\.]\+' | cut -c 2-)"
+tempFolder="/tmp/glab_v${latest}"
+
+printf -- "Found version %s\n" "${latest}"
+
+mkdir -p "${tempFolder}" 2> /dev/null
+printf -- "Downloading glab_%s_%s_%s.tar.gz\n" "${latest}" "${os}" "${machine}"
+curl -sL "https://github.com/profclems/glab/releases/download/v${latest}/glab_${latest}_${os}_${machine}.tar.gz" | tar -C "${tempFolder}" -xzf -
+
+printf -- "Installing...\n"
+install -m755 "${tempFolder}/bin/glab" "${BINDIR}/glab"
+
+printf "Cleaning up temp files\n"
+rm -rf "${tempFolder}"
+
+printf -- "Successfully installed glab into %s/\n" "${BINDIR}"