Run git prefetch as PROMPT_COMMAND. Modify alias handling for Darwin.

.bashrc

@@ -158,19 +158,42 @@ __git_prompt_command() {
   # Environment variables:
   #   GIT_DISABLE_PROMPT_PREFETCH=1	Disable automatic 'prefetch' of upstream refs.
   #					This can also be disabled on a per repository basis using:
-  #						git config --add --local --bool script.DisablePromptPrefetch true
+  #						git config ---local -replace-all --type bool script.DisablePromptPrefetch true
   # Returns:				0 = Tasks completed successfully.
   #					1 = An error occured.
+  local GIT_REPO_INFO LC_ALL="C" NOW SANITISED_REPO
 
-  # Run prefetch tasks if inside a work directory.
-  [[ -z "$GIT_DISABLE_PROMPT_PREFETCH" ]] && [[ "$(git rev-parse --is-inside-work-tree 2>/dev/null)" == "true" ]] && \
-      [[ "$(git config --get --local --bool script.DisablePromptPrefetch 2>/dev/null)" != "true" ]] && {
-    git maintenance run --task=prefetch 2>/dev/null || {
-      printf "\\033[1;31m%s\\033[39m\\n" "Git maintenance 'prefetch' task failed." >&2
-      return 1
+  # shellcheck disable=SC2207
+  GIT_REPO_INFO=( $( git rev-parse --is-inside-work-tree --show-toplevel 2>/dev/null) ) || return 1
+
+  # Only process if in a work directory.
+  [[ "${GIT_REPO_INFO[0]}" == "true" ]] && {
+    # Run prefetch tasks if not disabled.
+    [[ -z "$GIT_DISABLE_PROMPT_PREFETCH" ]] && [[ "$(git config --local --get --type bool script.DisablePromptPrefetch 2>/dev/null)" != "true" ]] && {
+      git maintenance run --task=prefetch 2>/dev/null || {
+        printf "\\033[1;31m%s\\033[39m\\n" "Git maintenance 'prefetch' task failed." >&2
+        return 1
+      }
     }
-  }
 
+    # The time now.
+    if [[ "$PLATFORM" == "Linux" ]]; then
+      NOW="$(date +'%s%3N')"
+    elif [[ "$PLATFORM" == "Darwin" ]]; then
+      NOW="$(perl -e 'use Time::HiRes; printf "%.3f", Time::HiRes::time();')"
+      NOW="${NOW/.}"
+    fi
+
+# FIXME: This is unfinished.
+
+#    SANITISED_REPO"${GIT_REPO_INFO[1]//[^[:alnum:]]/_}"
+#    if (( BASH_VERSINFO[0] >= 4 )); then
+#    else
+#    TIMESTAMP_VAR="GIT_REPO_TIMESTAMP_$SANITISED_REPO"
+#    [[ -z "${!TIMESTAMP_VAR}" ]] {
+#      "GIT_REPO_TIMESTAMP_$SANITISED_REPO"=
+
+  }
   return 0
 }
 
@@ -481,17 +504,11 @@ export PS4='+(\[\033[1;33m\]$?\[\033[39m\]) \[\033[1;34m\]${BASH_SOURCE##*/}\[\0
 
 # Common aliases.
 hash bc >/dev/null 2>&1 && alias bc='bc -lq'
-hash diff >/dev/null 2>&1 && alias diff='diff --color=auto -u'
-hash gpg2 >/dev/null 2>&1 && {
-  alias gpg='command gpg2'
-  alias gpg2='gpg2 --pinentry-mode=loopback'
-}
 hash grep >/dev/null 2>&1 && {
   alias egrep='grep -E --color=auto'
   alias fgrep='grep -F --color=auto'
   alias grep='grep --color=auto'
 }
-hash nc >/dev/null 2>&1 && alias pastebin='nc termbin.com 9999'
 
 # Auto start the ssh agent and add keys for scp/sftp/ssh.
 __ssh_agent_prompt_command
@@ -529,7 +546,9 @@ if [[ "$PLATFORM" = "Linux" ]]; then
   }
 
   # Linux specific aliases.
+  hash diff >/dev/null 2>&1 && alias diff='diff --color=auto -u'
   hash ftpwho >/dev/null 2>&1 && alias ftpwho='ftpwho -v'
+  hash gpg2 >/dev/null 2>&1 && alias gpg='command gpg2' && alias gpg2='gpg2 --pinentry-mode=loopback'
   hash iftop >/dev/null 2>&1 && alias iftop='TERM=vt100 iftop'
   hash iotop >/dev/null 2>&1 && alias iotop='TERM=linux iotop'
   hash ip >/dev/null 2>&1 && alias ip='ip -color=auto'
@@ -538,12 +557,19 @@ if [[ "$PLATFORM" = "Linux" ]]; then
   hash minicom >/dev/null 2>&1 && alias minicom='minicom -m -c on'
   hash mkpasswd >/dev/null 2>&1 && alias mkpasswd='mkpasswd -m sha512crypt'
   hash mkpasswd >/dev/null 2>&1 && alias pwgen='mkpasswd -m sha512crypt'
+  hash nc >/dev/null 2>&1 && alias pastebin='nc termbin.com 9999'
   hash pinfo >/dev/null 2>&1 && alias info='pinfo'
   hash ping >/dev/null 2>&1 && alias ping='ping -b'
 elif [[ "$PLATFORM" = "Darwin" ]]; then
-  # Darwin specific aliases.
-  hash df >/dev/null 2>&1 && alias df='df -P'
-  hash ls >/dev/null 2>&1 && alias ls='ls -bFG'
+  # Darwin specific aliases (some dependant on macports)
+  [[ ! -e "/opt/local/libexec/gnubin/df" ]] && alias df='df -kP'
+  # shellcheck disable=SC2015
+  [[ ! -e "/opt/local/libexec/gnubin//diff" ]] && alias diff='diff -u' || alias diff='diff --color=auto -u'
+  hash last less >/dev/null 2>&1 && alias laston='last | less'
+  # shellcheck disable=SC2015
+  [[ ! -e "/opt/local/libexec/gnubin/ls" ]] && alias ls='ls -bFGO' || alias ls='ls -bFv --color=auto'
+  [[ -e "/opt/local/libexec/gnubin/nc" ]] && alias pastebin='nc termbin.com 9999'
+  [[ -e "/opt/local/bin/pinfo" ]] && alias info='pinfo'
   hash top >/dev/null 2>&1 && alias top='top -o cpu -S'
 else
   printf "%s: %s\\n" "${BASH_SOURCE##*/}" "unsupported platform: $PLATFORM" >&2