From bebbc9bb1c32f3f460ca6d6e81446fcc996dc9d6 Mon Sep 17 00:00:00 2001
From: Tom Ryder <tom@sanctum.geek.nz>
Date: Thu, 20 Jun 2013 22:51:35 +1200
Subject: Massive overhaul of structure for Bash files

*   No longer using .bash_logout
*   No longer using .bash_profile, using POSIX-compliant .profile
*   instead; in particular, moved most of environment settings into
    .profile
*   Moved some of the separable functionality of both .profile and
    .bashrc into subdirectories (some scripts shared, some not)
*   Tidied implementation of ls/grep aliases
*   Updated install script to reflect all of the above
---
 bash/bashrc.d/prompt.bash | 82 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 bash/bashrc.d/prompt.bash

(limited to 'bash/bashrc.d/prompt.bash')

diff --git a/bash/bashrc.d/prompt.bash b/bash/bashrc.d/prompt.bash
new file mode 100644
index 00000000..f82ef12f
--- /dev/null
+++ b/bash/bashrc.d/prompt.bash
@@ -0,0 +1,82 @@
+# Frontend to controlling prompt
+function prompt {
+    local colors=$(tput colors 2>/dev/null)
+    local color reset branch head state url root ret
+
+    if [[ $colors -ge 256 ]]; then
+        color='\[\e[38;5;10m\]'
+        reset='\[\e[0m\]'
+    elif [[ $colors -ge 8 ]]; then
+        color='\[\e[1;32m\]'
+        reset='\[\e[0m\]'
+    fi
+
+    case "$1" in
+
+        # Turn complex coloured prompt on
+        on) 
+            PROMPT_COMMAND='history -a'
+            PS1='\[\a\][\u@\h:\w]$(prompt return)$(prompt vcs)$(prompt jobs)\$'
+            PS1="${color}${PS1}${reset} "
+            ;;
+
+        # Revert to simple inexpensive prompt
+        off)
+            PROMPT_COMMAND=
+            PS1='\[\a\]\$ '
+            ;;
+
+        # Git prompt function
+        git)
+            git branch &>/dev/null || return 1
+            head="$(git symbolic-ref HEAD 2>/dev/null)"
+            branch="${head##*/}"
+            [[ -n "$(git status 2>/dev/null | \
+                grep -F 'nothing to commit')" ]] || state="!"
+            printf '(git:%s)' "${branch:-unknown}${state}"
+            ;;
+
+        # Mercurial prompt function
+        hg)
+            hg branch &>/dev/null || return 1
+            branch="$(hg branch 2>/dev/null)"
+            [[ -n "$(hg status 2>/dev/null)" ]] && state="!"
+            printf '(hg:%s)' "${branch:-unknown}${state}"
+            ;;
+
+        # Subversion prompt function
+        svn)
+            svn info &>/dev/null || return 1
+            url="$(svn info 2>/dev/null | \
+                awk -F': ' '$1 == "URL" {print $2}')"
+            root="$(svn info 2>/dev/null | \
+                awk -F': ' '$1 == "Repository Root" {print $2}')"
+            branch=${url/$root}
+            branch=${branch#/}
+            branch=${branch#branches/}
+            branch=${branch%%/*}
+            [[ -n "$(svn status 2>/dev/null)" ]] && state="!"
+            printf '(svn:%s)' "${branch:-unknown}${state}"
+            ;;
+
+        # VCS wrapper prompt function
+        vcs)
+            prompt git || prompt svn || prompt hg
+            ;;
+
+        # Return status prompt function
+        return)
+            ret=$? 
+            [[ $ret -ne 0 ]] && printf '<%d>' ${ret}
+            ;;
+
+        # Job count prompt function
+        jobs)
+            [[ -n "$(jobs)" ]] && printf '{%d}' $(jobs | sed -n '$=')
+            ;;
+    esac
+}
+
+# Start with full-fledged prompt
+prompt on
+
-- 
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