No longer rely on cargo-update

bin/update

@@ -244,21 +244,31 @@ update-rust() {
     echo -e "\033[32;1m=== Updating rust ===\033[0m"
     rustup update
 
-    cargo install-update --help > /dev/null 2>&1
-
-    # Program to update cargo programs is not installed
-    if [ $? -ne 0 ]; then
-
-        echo -e "\033[33;1m=== To allow updating rust packages, run \`cargo install cargo-update\`===\033[0m"
-
-    fi
-
-    # If the user has no root, and if he doesn't have openssl, we won't install cargo update.
-    # Before running cargo update, we check again that it is installed.
-    cargo install-update --help > /dev/null 2>&1
     if [ $? -eq 0 ]; then
         echo -e "\033[32;1m=== Updating rust packages ===\033[0m"
-        cargo install-update -ag
+
+        IFS=$'\n'
+        for line in $(cargo install --list); do
+            if [[ $line == " "* ]] || [[ $line == "\t"* ]]; then
+                continue
+            fi
+
+            if [[ $line == *"("* ]]; then
+                crate=$(echo $line | cut -d ' ' -f 1)
+                full_repo=$(echo $line | cut -d '(' -f 2 | cut -d ')' -f 1)
+                repo=$(echo $full_repo | cut -d '#' -f 1)
+                current_commit=$(echo $full_repo | cut -d '#' -f 2)
+                latest_commit=$(git ls-remote $repo | head -n 1 | cut -d $'\t' -f 1)
+
+                if [[ $latest_commit == ${current_commit}* ]]; then
+                    echo -e "     \x1b[32;1mIgnored\x1b[0m package \`$crate\` is already installed"
+                else
+                    cargo install --git $repo
+                fi
+            else
+                cargo install $(echo $line | cut -d ' ' -f 1)
+            fi
+        done
     fi
 
     local seconds=$((`date +%s` - $start))