diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index cdadc1434..50e00f9c9 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -10,6 +10,10 @@ on:
     branches: 
       - master
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   tests:
     name: Run tests
diff --git a/.github/workflows/project.yml b/.github/workflows/project.yml
index 800761554..4b671d449 100644
--- a/.github/workflows/project.yml
+++ b/.github/workflows/project.yml
@@ -5,6 +5,10 @@ on:
   pull_request_target:
     types: [opened, synchronize]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   add-to-project:
     name: Add to project
diff --git a/lib/vcs_info.zsh b/lib/vcs_info.zsh
index 01dcd90b6..e60938c14 100644
--- a/lib/vcs_info.zsh
+++ b/lib/vcs_info.zsh
@@ -1,8 +1,11 @@
-# Impacted versions go from v5.0.3 to v5.8 (v5.8.1 is the first patched version)
-autoload -Uz is-at-least
-if is-at-least 5.8.1 || ! is-at-least 5.0.3; then
-  return
-fi
+# Don't skip this file until a Zsh release does the necessary quoting.
+# This is because even though 5.8.1 undid recursive prompt_subst inside
+# prompt sequences, % characters in relevant fields will still be rendered
+# incorrectly in vcs_info, on all Zsh releases up to writing this.
+#
+# There is no release yet that does this right, since it requires changing
+# how what vcs_info hooks expect to receive. Even so, I'd rather be correct
+# and break custom vcs_info hooks than have a broken prompt.
 
 # Quote necessary $hook_com[<field>] items just before they are used
 # in the line "VCS_INFO_hook 'post-backend'" of the VCS_INFO_formats
@@ -35,7 +38,7 @@ fi
 # due to malicious input as a consequence of CVE-2021-45444, which affects
 # zsh versions from 5.0.3 to 5.8.
 #
-autoload -Uz +X regexp-replace VCS_INFO_formats
+autoload -Uz +X regexp-replace VCS_INFO_formats 2>/dev/null || return
 
 # We use $tmp here because it's already a local variable in VCS_INFO_formats
 typeset PATCH='for tmp (base base-name branch misc revision subdir) hook_com[$tmp]="${hook_com[$tmp]//\%/%%}"'
diff --git a/plugins/copydir/README.md b/plugins/copydir/README.md
index 594bf1065..cf24b789f 100644
--- a/plugins/copydir/README.md
+++ b/plugins/copydir/README.md
@@ -1,10 +1,3 @@
 # copydir plugin
 
-Copies the path of your current folder to the system clipboard.
-
-To use, add `copydir` to your plugins array:
-```
-plugins=(... copydir)
-```
-
-Then use the command `copydir` to copy the $PWD.
+This plugin is deprecated. Use the [`copypath` plugin](https://github.com/ohmyzsh/ohmyzsh/tree/master/plugins/copypath) instead.
diff --git a/plugins/copydir/copydir.plugin.zsh b/plugins/copydir/copydir.plugin.zsh
index c45106240..a2b489ec0 100644
--- a/plugins/copydir/copydir.plugin.zsh
+++ b/plugins/copydir/copydir.plugin.zsh
@@ -1,5 +1,7 @@
-# Copies the pathname of the current directory to the system or X Windows clipboard
+echo ${(%):-'%F{yellow}The `%Bcopydir%b` plugin is deprecated. Use the `%Bcopypath%b` plugin instead.%f'}
+source "$ZSH/plugins/copypath/copypath.plugin.zsh"
+
+# TODO: 2022-02-22: Remove deprecated copydir function.
 function copydir {
-  emulate -L zsh
-  print -n $PWD | clipcopy
+  copypath
 }
diff --git a/plugins/copypath/README.md b/plugins/copypath/README.md
new file mode 100644
index 000000000..1e5a463a6
--- /dev/null
+++ b/plugins/copypath/README.md
@@ -0,0 +1,15 @@
+# copypath plugin
+
+Copies the path of given directory or file to the system clipboard.
+
+To use it, add `copypath` to the plugins array in your zshrc file:
+
+```zsh
+plugins=(... copypath)
+```
+
+## Usage
+
+- `copypath`: copies the absolute path of the current directory.
+
+- `copypath <file_or_directory>`: copies the absolute path of the given file.
diff --git a/plugins/copypath/copypath.plugin.zsh b/plugins/copypath/copypath.plugin.zsh
new file mode 100644
index 000000000..8fe0a85f4
--- /dev/null
+++ b/plugins/copypath/copypath.plugin.zsh
@@ -0,0 +1,15 @@
+# Copies the path of given directory or file to the system or X Windows clipboard.
+# Copy current directory if no parameter.
+function copypath {
+  # If no argument passed, use current directory
+  local file="${1:-.}"
+
+  # If argument is not an absolute path, prepend $PWD
+  [[ $file = /* ]] || file="$PWD/$file"
+
+  # Copy the absolute path without resolving symlinks
+  # If clipcopy fails, exit the function with an error
+  print -n "${file:a}" | clipcopy || return 1
+
+  echo ${(%):-"%B${file:a}%b copied to clipboard."}
+}
diff --git a/plugins/dotenv/dotenv.plugin.zsh b/plugins/dotenv/dotenv.plugin.zsh
index 394455ae1..46cd4b10a 100644
--- a/plugins/dotenv/dotenv.plugin.zsh
+++ b/plugins/dotenv/dotenv.plugin.zsh
@@ -52,7 +52,10 @@ source_env() {
   fi
 
   # test .env syntax
-  zsh -fn $ZSH_DOTENV_FILE || echo "dotenv: error when sourcing '$ZSH_DOTENV_FILE' file" >&2
+  zsh -fn $ZSH_DOTENV_FILE || {
+    echo "dotenv: error when sourcing '$ZSH_DOTENV_FILE' file" >&2
+    return 1
+  }
 
   setopt localoptions allexport
   source $ZSH_DOTENV_FILE
diff --git a/plugins/helm/helm.plugin.zsh b/plugins/helm/helm.plugin.zsh
index cadfa551a..05bb19a44 100644
--- a/plugins/helm/helm.plugin.zsh
+++ b/plugins/helm/helm.plugin.zsh
@@ -14,9 +14,9 @@ command mkdir -p "$ZSH_CACHE_DIR/completions"
 # If the completion file does not exist, generate it and then source it
 # Otherwise, source it and regenerate in the background
 if [[ ! -f "$ZSH_CACHE_DIR/completions/_helm" ]]; then
-  helm completion zsh >| "$ZSH_CACHE_DIR/completions/_helm"
+  helm completion zsh | tee "$ZSH_CACHE_DIR/completions/_helm" >/dev/null
   source "$ZSH_CACHE_DIR/completions/_helm"
 else
   source "$ZSH_CACHE_DIR/completions/_helm"
-  helm completion zsh >| "$ZSH_CACHE_DIR/completions/_helm" &|
+  helm completion zsh | tee "$ZSH_CACHE_DIR/completions/_helm" >/dev/null &|
 fi
diff --git a/plugins/kubectl/kubectl.plugin.zsh b/plugins/kubectl/kubectl.plugin.zsh
index eed5727d1..89efeaca5 100644
--- a/plugins/kubectl/kubectl.plugin.zsh
+++ b/plugins/kubectl/kubectl.plugin.zsh
@@ -11,11 +11,11 @@ if (( $+commands[kubectl] )); then
   # If the completion file does not exist, generate it and then source it
   # Otherwise, source it and regenerate in the background
   if [[ ! -f "$ZSH_CACHE_DIR/completions/_kubectl" ]]; then
-    kubectl completion zsh >| "$ZSH_CACHE_DIR/completions/_kubectl"
+    kubectl completion zsh | tee "$ZSH_CACHE_DIR/completions/_kubectl" >/dev/null
     source "$ZSH_CACHE_DIR/completions/_kubectl"
   else
     source "$ZSH_CACHE_DIR/completions/_kubectl"
-    kubectl completion zsh >| "$ZSH_CACHE_DIR/completions/_kubectl" &|
+    kubectl completion zsh | tee "$ZSH_CACHE_DIR/completions/_kubectl" >/dev/null &|
   fi
 fi
 
diff --git a/themes/michelebologna.zsh-theme b/themes/michelebologna.zsh-theme
index 7ff6a7ffe..bb86d68db 100644
--- a/themes/michelebologna.zsh-theme
+++ b/themes/michelebologna.zsh-theme
@@ -35,23 +35,17 @@ local reset="%{$reset_color%}"
 local -a color_array
 color_array=($green $red $cyan $yellow $blue $magenta $white)
 
-local username_normal_color=$white
-local username_root_color=$red
-local hostname_root_color=$red
-
-# calculating hostname color with hostname characters
-for i in `hostname`; local hostname_normal_color=$color_array[$[((#i))%7+1]]
-local -a hostname_color
-hostname_color=%(!.$hostname_root_color.$hostname_normal_color)
-
+local username_color=$white
+local hostname_color=$color_array[$[((#HOST))%7+1]] # choose hostname color based on first character
 local current_dir_color=$blue
-local username_command="%n"
-local hostname_command="%m"
+
+local username="%n"
+local hostname="%m"
 local current_dir="%~"
 
-local username_output="%(!..$username_normal_color$username_command$reset@)"
-local hostname_output="$hostname_color$hostname_command$reset"
-local current_dir_output="$current_dir_color$current_dir$reset"
+local username_output="%(!..${username_color}${username}${reset}@)"
+local hostname_output="${hostname_color}${hostname}${reset}"
+local current_dir_output="${current_dir_color}${current_dir}${reset}"
 local jobs_bg="${red}fg: %j$reset"
 local last_command_output="%(?.%(!.$red.$green).$yellow)"
 
@@ -68,8 +62,18 @@ ZSH_THEME_GIT_PROMPT_AHEAD_REMOTE=">"
 ZSH_THEME_GIT_PROMPT_BEHIND_REMOTE="<"
 ZSH_THEME_GIT_PROMPT_DIVERGED_REMOTE="$red<>"
 
-PROMPT='$username_output$hostname_output:$current_dir_output%1(j. [$jobs_bg].)'
-GIT_PROMPT='$(out=$(git_prompt_info)$(git_prompt_status)$(git_remote_status);if [[ -n $out ]]; then printf %s " $white($green$out$white)$reset";fi)'
-PROMPT+="$GIT_PROMPT"
+function michelebologna_git_prompt {
+  local out=$(git_prompt_info)$(git_prompt_status)$(git_remote_status)
+  [[ -n $out ]] || return
+  printf " %s(%s%s%s)%s" \
+    "%{$fg_bold[white]%}" \
+    "%{$fg_bold[green]%}" \
+    "$out" \
+    "%{$fg_bold[white]%}" \
+    "%{$reset_color%}"
+}
+
+PROMPT="$username_output$hostname_output:$current_dir_output%1(j. [$jobs_bg].)"
+PROMPT+='$(michelebologna_git_prompt)'
 PROMPT+=" $last_command_output%#$reset "
 RPROMPT=''
diff --git a/tools/check_for_upgrade.sh b/tools/check_for_upgrade.sh
index a36aecb84..76d42d388 100644
--- a/tools/check_for_upgrade.sh
+++ b/tools/check_for_upgrade.sh
@@ -65,18 +65,27 @@ function is_update_available() {
   local remote_head
   remote_head=$(
     if (( ${+commands[curl]} )); then
-      curl -fsSL -H 'Accept: application/vnd.github.v3.sha' $api_url 2>/dev/null
+      curl -m 2 -fsSL -H 'Accept: application/vnd.github.v3.sha' $api_url 2>/dev/null
     elif (( ${+commands[wget]} )); then
-      wget -O- --header='Accept: application/vnd.github.v3.sha' $api_url 2>/dev/null
+      wget -T 2 -O- --header='Accept: application/vnd.github.v3.sha' $api_url 2>/dev/null
     elif (( ${+commands[fetch]} )); then
-      HTTP_ACCEPT='Accept: application/vnd.github.v3.sha' fetch -o - $api_url 2>/dev/null
+      HTTP_ACCEPT='Accept: application/vnd.github.v3.sha' fetch -T 2 -o - $api_url 2>/dev/null
     else
       exit 0
     fi
   ) || return 1
 
-  # Compare local and remote HEADs
-  [[ "$local_head" != "$remote_head" ]]
+  # Compare local and remote HEADs (if they're equal there are no updates)
+  [[ "$local_head" != "$remote_head" ]] || return 1
+
+  # If local and remote HEADs don't match, check if there's a common ancestor
+  # If the merge-base call fails, $remote_head might not be downloaded so assume there are updates
+  local base
+  base=$(cd -q "$ZSH"; git merge-base $local_head $remote_head 2>/dev/null) || return 0
+
+  # If the common ancestor ($base) is not $remote_head,
+  # the local HEAD is older than the remote HEAD
+  [[ $base != $remote_head ]]
 }
 
 function update_last_updated_file() {
diff --git a/tools/install.sh b/tools/install.sh
index e64e39063..7953ad112 100755
--- a/tools/install.sh
+++ b/tools/install.sh
@@ -42,13 +42,17 @@ set -e
 # $USER is defined by login(1) which is not always executed (e.g. containers)
 # POSIX: https://pubs.opengroup.org/onlinepubs/009695299/utilities/id.html
 USER=${USER:-$(id -u -n)}
+# $HOME is defined at the time of login, but it could be unset. If it is unset,
+# a tilde by itself (~) will not be expanded to the current user's home directory.
+# POSIX: https://pubs.opengroup.org/onlinepubs/009696899/basedefs/xbd_chap08.html#tag_08_03
+HOME="${HOME:-$(getent passwd $USER | cut -d: -f6)}"
 
 
 # Track if $ZSH was provided
 custom_zsh=${ZSH:+yes}
 
 # Default settings
-ZSH=${ZSH:-~/.oh-my-zsh}
+ZSH="${ZSH:-$HOME/.oh-my-zsh}"
 REPO=${REPO:-ohmyzsh/ohmyzsh}
 REMOTE=${REMOTE:-https://github.com/${REPO}.git}
 BRANCH=${BRANCH:-master}
@@ -268,7 +272,7 @@ setup_ohmyzsh() {
   fi
 
   # Manual clone with git config options to support git < v1.7.2
-  git init "$ZSH" && cd "$ZSH" \
+  git init --quiet "$ZSH" && cd "$ZSH" \
   && git config core.eol lf \
   && git config core.autocrlf false \
   && git config fsck.zeroPaddedFilemode ignore \