wip3

install/golang

@@ -7,6 +7,8 @@
 
 set -eo pipefail
 
+installed() { command -v "$1" >/dev/null 2>&1; }
+
 doRemove() {
     [ -d "/usr/local/go" ] && sudo rm -rf "/usr/local/go"
 }
@@ -20,22 +22,42 @@ install() {
     echo "Installing golang v$version"
     echo "==============================================="
     echo
-    latestJson=$(echo "$json" | jq -r '.[0].files.[] | select (.kind == "archive" and .os == "linux" and .arch == "amd64")')
+
+    local os="linux"
+    [ "$(uname -s)" = "Darwin" ] && os="darwin"
+
+    latestJson=$(echo "$json" | jq -r ".[0].files.[] | select (.kind == \"archive\" and .os == \"$os\" and .arch == \"amd64\")")
     fileName=$(echo "$latestJson" | jq -r '.filename')
     fileUrl="$dlUrl/$fileName"
     downloadPath="$HOME/install"
     archivePath="$downloadPath/$fileName"
     doRemove
-    [ -f "$archivePath" ] || wget "$fileUrl" -O "$archivePath"
-    [ -f "$archivePath" ] && sudo tar -xzf "$archivePath" -C /usr/local
+    if [ ! -f "$archivePath" ]; then
+        if installed wget; then
+            wget -q --show-progress "$fileUrl" -O "$archivePath"
+        else
+            curl -fsSL "$fileUrl" -o "$archivePath"
+        fi
+    fi
+    sudo tar -xzf "$archivePath" -C /usr/local
     sudo chown "$USER": -R /usr/local/go
-    echo 'export PATH="/usr/local/go/bin:$PATH"' >> "$HOME/.profile"
-    echo "export GOPATH=\"\$HOME/.go\"" >> "$HOME/.profile"
+    if ! grep -q '/usr/local/go/bin' "$HOME/.profile" 2>/dev/null; then
+        echo 'export PATH="/usr/local/go/bin:$PATH"' >> "$HOME/.profile"
+        echo "export GOPATH=\"\$HOME/.go\"" >> "$HOME/.profile"
+    fi
+
+    # shellcheck source=/dev/null
+    source "$HOME/.profile"
+
     echo
     go version
     go install github.com/go-delve/delve/cmd/dlv@latest
-    go install
     echo "Finish!"
+    echo
+}
+
+upgrade() {
+    install
 }
 
 remove() {
@@ -45,12 +67,15 @@ remove() {
     echo "==============================================="
     echo
     doRemove
+    sed -i '/\/usr\/local\/go\/bin/d' "$HOME/.profile"
+    sed -i '/GOPATH/d' "$HOME/.profile"
     echo
     echo "Finish!"
     echo
 }
 
 case "$1" in
+    u|upgrade|update) upgrade ;;
     r|remove|d|delete|p|purge) remove ;;
     *) install ;;
 esac