Merge branch 'master' of https://git.scientificdatasystems.co.uk/robin/useful_linux_scripts

rename_mac.sh

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+sudo scutil --set ComputerName $1
+sudo scutil --set HostName $1
+sudo scutil --set LocalHostName $1
+

zshrc.zshrc

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+alias pyviz='source ~/pyviz/bin/activate'
+
+export STM32_PRG_PATH=/Applications/STMicroelectronics/STM32Cube/STM32CubeProgrammer/STM32CubeProgrammer.app/Contents/MacOs/bin
+
+# ------------------------------------------------------------
+# Basic environment
+# ------------------------------------------------------------
+
+export EDITOR=vi
+export PAGER=less
+export LANG=en_GB.UTF-8
+
+# ------------------------------------------------------------
+# History (zsh-native, better than bash)
+# ------------------------------------------------------------
+
+HISTFILE=~/.zsh_history
+HISTSIZE=50000
+SAVEHIST=50000
+
+setopt INC_APPEND_HISTORY
+setopt SHARE_HISTORY
+setopt HIST_IGNORE_ALL_DUPS
+setopt HIST_REDUCE_BLANKS
+
+# ------------------------------------------------------------
+# Completion system
+# ------------------------------------------------------------
+
+autoload -Uz compinit
+compinit
+
+# ------------------------------------------------------------
+# Git branch helper (explicit NO GIT REPO)
+# ------------------------------------------------------------
+
+
+
+
+
+# ------------------------------------------------------------
+# Aliases (bash-compatible)
+# ------------------------------------------------------------
+
+alias ll='ls -lh'
+alias la='ls -A'
+alias l='ls -CF'
+alias gs='git status'
+alias gd='git diff'
+
+# ------------------------------------------------------------
+# Path additions (example)
+# ------------------------------------------------------------
+
+export PATH="$HOME/bin:$PATH"
+
+
+# ------------------------------------------------------------
+# Git branch helper (branch only, explicit NO GIT REPO)
+# ------------------------------------------------------------
+
+git_branch() {
+  if git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
+    git symbolic-ref --short HEAD 2>/dev/null || echo "DETACHED"
+  else
+    echo "NO GIT REPO"
+  fi
+}
+
+# ------------------------------------------------------------
+# Prompt with colours
+# ------------------------------------------------------------
+
+setopt PROMPT_SUBST
+setopt NO_NOMATCH
+
+# Colours:
+# %F{colour} ... %f   = foreground colour on/off
+
+PROMPT='%n@%F{208}%m%f %F{green}%~%f [%F{red}$(git_branch)%f] %# '
+