From 30c57e10389f10f356832e0fd8367df27327057c Mon Sep 17 00:00:00 2001
From: Gea-Suan Lin <gslin@gslin.org>
Date: Fri, 7 Apr 2023 21:45:07 +0800
Subject: [PATCH] Prevent from duplicated entries in PATH.

---
 .bashrc       |  8 +++++++-
 .bashrc.local | 15 ++++++++++++---
 .zshrc        |  8 +++++++-
 .zshrc.local  | 15 ++++++++++++---
 4 files changed, 38 insertions(+), 8 deletions(-)

diff --git a/.bashrc b/.bashrc
index efdd219..453a7fe 100644
--- a/.bashrc
+++ b/.bashrc
@@ -51,10 +51,16 @@ export HISTTIMEFORMAT="%y/%m/%d %T "
 export HOMEBREW_NO_ANALYTICS=1
 export LESS="-EfmrSwX"
 export LSCOLORS="gxfxcxdxbxegedabagacad"
-export PATH="${HOME}/bin:${HOME}/.local/bin:${PATH}"
 export PYTHONDONTWRITEBYTECODE=yes
 export QUILT_PATCHES="debian/patches"
 #
+if [[ ! "${PATH}" =~ "(^|:)${HOME}/bin(:|$)" ]]; then
+    export PATH="${HOME}/bin:${PATH}"
+fi
+if [[ ! "${PATH}" =~ "(^|:)${HOME}/\\.local/bin(:|$)" ]]; then
+    export PATH="${HOME}/.local/bin:${PATH}"
+fi
+#
 if [ -e /usr/lib/jvm/default-java ]; then
     export JAVA_HOME=/usr/lib/jvm/default-java
 fi
diff --git a/.bashrc.local b/.bashrc.local
index 3efdc37..e18a1c0 100644
--- a/.bashrc.local
+++ b/.bashrc.local
@@ -11,7 +11,12 @@ alias update="(cd ~/git; make all)"
 #
 export PYENV_ROOT="${HOME}/.pyenv"
 if [ -d "${PYENV_ROOT}" ]; then
-    export PATH="${PYENV_ROOT}/bin:${PYENV_ROOT}/shims:${PATH}"
+    if [[ ! "${PATH}" =~ "(^|:)${PYENV_ROOT}/bin(:|$)" ]]; then
+        export PATH="${PYENV_ROOT}/bin:${PATH}"
+    fi
+    if [[ ! "${PATH}" =~ "(^|:)${PYENV_ROOT}/shims(:|$)" ]]; then
+        export PATH="${PYENV_ROOT}/shims:${PATH}"
+    fi
     eval "$(pyenv init - --no-rehash)"
 fi
 #
@@ -19,11 +24,15 @@ export NVM_DIR="$([ -z "${XDG_CONFIG_HOME-}" ] && printf %s "${HOME}/.nvm" || pr
 [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" # This loads nvm
 #
 if [ -d "${HOME}/.rbenv" ]; then
-    export PATH="${HOME}/.rbenv/bin:${PATH}"
+    if [[ ! "${PATH}" =~ "(^|:)${HOME}/\\.rbenv/bin(:|$)" ]]; then
+        export PATH="${HOME}/.rbenv/bin:${PATH}"
+    fi
     eval "$(rbenv init - --no-rehash)"
 fi
 #
 if [ -d "${HOME}/.rvm" ]; then
-    export PATH="${HOME}/.rvm/bin:${PATH}"
+    if [[ ! "${PATH}" =~ "(^|:)${HOME}/\\.rvm/bin(:|$)" ]]; then
+        export PATH="${HOME}/.rvm/bin:${PATH}"
+    fi
     source "${HOME}/.rvm/scripts/rvm"
 fi
diff --git a/.zshrc b/.zshrc
index af7bc97..c9a1a03 100644
--- a/.zshrc
+++ b/.zshrc
@@ -131,11 +131,17 @@ export HISTSIZE=2000
 export HOMEBREW_NO_ANALYTICS=1
 export LESS="-EfmrSwX"
 export LSCOLORS="gxfxcxdxbxegedabagacad"
-export PATH="${HOME}/bin:${HOME}/.local/bin:${PATH}"
 export PYTHONDONTWRITEBYTECODE=yes
 export QUILT_PATCHES="debian/patches"
 export SAVEHIST=2000
 #
+if [[ ! "${PATH}" =~ "(^|:)${HOME}/bin(:|$)" ]]; then
+    export PATH="${HOME}/bin:${PATH}"
+fi
+if [[ ! "${PATH}" =~ "(^|:)${HOME}/\\.local/bin(:|$)" ]]; then
+    export PATH="${HOME}/.local/bin:${PATH}"
+fi
+#
 if [[ -e /usr/lib/jvm/default-java ]]; then
     export JAVA_HOME=/usr/lib/jvm/default-java
 fi
diff --git a/.zshrc.local b/.zshrc.local
index a1ad449..95c6f71 100644
--- a/.zshrc.local
+++ b/.zshrc.local
@@ -11,7 +11,12 @@ alias "update=(cd ~/git; make all)"
 #
 export PYENV_ROOT="${HOME}/.pyenv"
 if [ -d "${PYENV_ROOT}" ]; then
-    export PATH="${PYENV_ROOT}/bin:${PYENV_ROOT}/shims:${PATH}"
+    if [[ ! "${PATH}" =~ "(^|:)${PYENV_ROOT}/bin(:|$)" ]]; then
+        export PATH="${PYENV_ROOT}/bin:${PATH}"
+    fi
+    if [[ ! "${PATH}" =~ "(^|:)${PYENV_ROOT}/shims(:|$)" ]]; then
+        export PATH="${PYENV_ROOT}/shims:${PATH}"
+    fi
     eval "$(pyenv init - --no-rehash)"
 fi
 #
@@ -19,11 +24,15 @@ export NVM_DIR="$([ -z "${XDG_CONFIG_HOME-}" ] && printf %s "${HOME}/.nvm" || pr
 [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" # This loads nvm
 #
 if [ -d "${HOME}/.rbenv" ]; then
-    export PATH="${HOME}/.rbenv/bin:${PATH}"
+    if [[ ! "${PATH}" =~ "(^|:)${HOME}/\\.rbenv/bin(:|$)" ]]; then
+        export PATH="${HOME}/.rbenv/bin:${PATH}"
+    fi
     eval "$(rbenv init - --no-rehash)"
 fi
 #
 if [ -d "${HOME}/.rvm" ]; then
-    export PATH="${HOME}/.rvm/bin:${PATH}"
+    if [[ ! "${PATH}" =~ "(^|:)${HOME}/\\.rvm/bin(:|$)" ]]; then
+        export PATH="${HOME}/.rvm/bin:${PATH}"
+    fi
     source "${HOME}/.rvm/scripts/rvm"
 fi