Improve install.sh

1 files changed, 77 insertions, 98 deletions

diff --git a/docs/install.sh b/docs/install.sh
index a3f55ea..1ef1dca 100755
--- a/docs/install.sh
+++ b/docs/install.sh
@@ -1,82 +1,83 @@
-#!/bin/sh
+#!/usr/bin/env bash
 
-set -e
+set -eu
 
 help() {
-    cat <<'EOF'
-Install a binary release of a Rust crate hosted on GitHub
+  cat <<'EOF'
+Install a binary release of `so` hosted on GitHub
 
 Usage:
-    install.sh [options]
+    install [options]
 
 Options:
     -h, --help      Display this message
-    --git SLUG      Get the crate from "https://github/$SLUG"
     -f, --force     Force overwriting an existing binary
-    --crate NAME    Name of the crate to install (default <repository name>)
     --tag TAG       Tag (version) of the crate to install (default <latest release>)
-    --target TARGET Install the release compiled for $TARGET (default <`rustc` host>)
     --to LOCATION   Where to install the binary (default ~/.cargo/bin)
 EOF
 }
 
+git=samtay/so
+crate=so
+url=https://github.com/samtay/so
+releases=$url/releases
+
+case "$(uname -s)" in
+  "Darwin")
+    platform="apple-darwin" ;;
+  "Linux")
+    platform="unknown-linux-musl" ;;
+  *)
+    platform="pc-windows-msvc";;
+esac
+
+target="$(uname -m)-$platform"
+
 say() {
-    echo "install.sh: $1"
+  echo "install: $1"
 }
 
 say_err() {
-    say "$1" >&2
+  say "$1" >&2
 }
 
 err() {
-    if [ ! -z $td ]; then
-        rm -rf $td
-    fi
+  if [ ! -z ${td-} ]; then
+    rm -rf $td
+  fi
 
-    say_err "ERROR $1"
-    exit 1
+  say_err "ERROR $1"
+  exit 1
 }
 
 need() {
-    if ! command -v $1 > /dev/null 2>&1; then
-        err "need $1 (command not found)"
-    fi
+  if ! command -v $1 > /dev/null 2>&1; then
+    err "need $1 (command not found)"
+  fi
 }
 
 force=false
 while test $# -gt 0; do
-    case $1 in
-        --crate)
-            crate=$2
-            shift
-            ;;
-        --force | -f)
-            force=true
-            ;;
-        --git)
-            git=$2
-            shift
-            ;;
-        --help | -h)
-            help
-            exit 0
-            ;;
-        --tag)
-            tag=$2
-            shift
-            ;;
-        --target)
-            target=$2
-            shift
-            ;;
-        --to)
-            dest=$2
-            shift
-            ;;
-        *)
-            ;;
-    esac
-    shift
+  case $1 in
+    --force | -f)
+      force=true
+      ;;
+    --help | -h)
+      help
+      exit 0
+      ;;
+    --tag)
+      tag=$2
+      shift
+      ;;
+    --to)
+      dest=$2
+      shift
+      ;;
+    *)
+      ;;
+  esac
+  shift
 done
 
 # Dependencies
@@ -88,67 +89,45 @@ need mktemp
 need tar
 
 # Optional dependencies
-if [ -z $crate ] || [ -z $tag ] || [ -z $target ]; then
-    need cut
-fi
-
-if [ -z $tag ]; then
-    need rev
-fi
-
-if [ -z $target ]; then
-    need grep
-    need rustc
+if [ -z ${tag-} ]; then
+  need cut
+  need rev
 fi
 
-if [ -z $git ]; then
-    err 'must specify a git repository using `--git`. Example: `install.sh --git japaric/cross`'
+if [ -z ${dest-} ]; then
+  dest="$HOME/.cargo/bin"
 fi
 
-url="https://github.com/$git"
-say_err "GitHub repository: $url"
-
-if [ -z $crate ]; then
-    crate=$(echo $git | cut -d'/' -f2)
+if [ -z ${tag-} ]; then
+  tag=$(curl -s "$releases/latest" | cut -d'"' -f2 | rev | cut -d'/' -f1 | rev)
 fi
 
-say_err "Crate: $crate"
+archive="$releases/download/$tag/$crate-$tag-$target.tar.gz"
 
-url="$url/releases"
+say_err "Repository:  $url"
+say_err "Crate:       $crate"
+say_err "Tag:         $tag"
+say_err "Target:      $target"
+say_err "Destination: $dest"
+say_err "Archive:     $archive"
 
-if [ -z $tag ]; then
-    tag=$(curl -s "$url/latest" | cut -d'"' -f2 | rev | cut -d'/' -f1 | rev)
-    say_err "Tag: latest ($tag)"
-else
-    say_err "Tag: $tag"
+# Check if binary exists
+if [ "$(curl --head --write-out "%{http_code}\n" --silent --output /dev/null "$archive")" -eq "404" ]; then
+  err "The binary you need does not exist; you can build the crate from source or open an issue requesting the target: $target"
 fi
 
-if [ -z $target ]; then
-    target=$(rustc -Vv | grep host | cut -d' ' -f2)
-fi
-
-say_err "Target: $target"
-
-if [ -z $dest ]; then
-    dest="$HOME/.cargo/bin"
-fi
-
-say_err "Installing to: $dest"
-
-url="$url/download/$tag/$crate-$tag-$target.tar.gz"
-
 td=$(mktemp -d || mktemp -d -t tmp)
-curl -sL $url | tar -C $td -xz
+curl -sL $archive | tar -C $td -xz
 
 for f in $(ls $td); do
-    test -x $td/$f || continue
-
-    if [ -e "$dest/$f" ] && [ $force = false ]; then
-        err "$f already exists in $dest"
-    else
-        mkdir -p $dest
-        install -m 755 $td/$f $dest
-    fi
+  test -x $td/$f || continue
+
+  if [ -e "$dest/$f" ] && [ $force = false ]; then
+    err "$f already exists in $dest; use --force to overwrite it"
+  else
+    mkdir -p $dest
+    install -m 755 $td/$f $dest
+  fi
 done
 
 rm -rf $td