Rename script to fit existing convention

bash(1)  already  mentions  _profile, _login,  _logout  and  _history.
.bashrc adds .bash_aliases (although .bashrc itself is an exception).

1 files changed, 189 insertions, 0 deletions

diff --git a/.bash_prompt b/.bash_prompt
new file mode 100644
index 0000000..a892c73
--- /dev/null
+++ b/.bash_prompt
@@ -0,0 +1,189 @@
+# Environment variables:
+#
+# PS1_SHOWHOSTNAME
+#       'auto' (default):       Only show hostname over SSH
+#       'yes':                  Always show hostname
+#       anything else:          Never show hostname
+
+
+__show-hostname ()
+{
+    case "${PS1_SHOWHOSTNAME}" in
+        (''|auto)
+            [ "${SSH_CONNECTION}" ];;
+        (yes)
+            true;;
+        (*)
+            false;;
+    esac
+}
+
+__have-gitprompt ()
+{
+    [ -f /usr/lib/git-core/git-sh-prompt ]
+}
+
+__set-title ()
+{
+    local title
+    local git_root=$(git root 2> /dev/null)
+
+    if [ ${git_root} ]
+    then
+        title=$(basename ${git_root})
+    else
+        local path=${PWD/~/\~}
+
+        if __show-hostname
+        then
+            title="${USER}@${HOSTNAME}:${path}"
+        else
+            title="${USER}:${path}"
+        fi
+    fi
+
+    # Cf. console_codes(4):
+    #
+    #   ESC ] 2 ; txt ST        Set window title to txt.
+    #
+    # ST is a "string terminator", either "ESC \" or "BEL".
+
+    echo -ne "\E]2;${title}\a"
+}
+
+# In order to know how much space PS1 takes, Bash needs us to delimit
+# non-printing characters with \[ and \].
+__start-nonprinting ()
+{
+    if [ ${BUILDING_PS1} ]
+    then
+        echo -en '\['
+    fi
+}
+
+__end-nonprinting ()
+{
+    if [ ${BUILDING_PS1} ]
+    then
+        echo -en '\]'
+    fi
+}
+
+__fontify ()
+{
+    local -A codes=(
+        [red]=31
+        [green]=32
+        [blue]=34
+        [bold]=1
+        [dim]=2
+    )
+
+    local text=$1
+    shift
+
+    __start-nonprinting
+    echo -en '\E['
+
+    for ((i=1; i<=$#; i++))
+    do
+        echo -en ${codes[${!i}]}
+
+        if ((i<$#))
+        then
+            echo -en ';'
+        else
+            echo -en 'm'
+        fi
+    done
+
+    __end-nonprinting
+
+    echo -en "${text}"
+    __start-nonprinting
+    echo -en '\E[0m'
+    __end-nonprinting
+}
+
+__set-prompt ()
+{
+    local last_status=$1
+    BUILDING_PS1=t
+    PS1=''
+
+    if [ ${last_status} -ne 0 ]
+    then
+        PS1+=$(__fontify "${last_status} " bold red) 
+    fi
+
+    PS1+=$(__fontify '\u' green)
+
+    if __show-hostname
+    then
+        PS1+=$(__fontify '@' dim)
+        PS1+=$(__fontify '\H' bold green)
+    fi
+
+    PS1+=$(__fontify : dim)
+    PS1+=$(__fontify '\w' bold blue)
+
+    if [ ${PS1_SHOWGITSTATUS} ]
+    then
+        PS1+=$(__fontify "$(__git_ps1 '(%s)')" red)
+    fi
+
+    PS1+=$(__fontify '\$' dim)
+    PS1+=' '
+
+    unset BUILDING_PS1
+}
+
+__current-column ()
+{
+    # Cf. console_codes(4) § ECMA-48 Status Report Commands
+
+    local position
+    read -sdR -p$'\E[6n' position
+
+    local pattern='\[[0-9]+;([0-9]+)'
+
+    if [[ ${position} =~ ${pattern} ]]
+    then
+        echo ${BASH_REMATCH[1]}
+    else
+        echo 0
+    fi
+}
+
+__draw-rule ()
+{
+    local rule=''
+    local column=$(__current-column)
+
+    for ((i=column; i<=COLUMNS; i++))
+    do
+        rule+=—
+    done
+    __fontify ${rule} dim
+}
+
+__refresh-terminal ()
+{
+    local last_status=$?
+
+    __set-title
+    __set-prompt ${last_status}
+    __draw-rule
+}
+
+
+if __have-gitprompt
+then
+    . /usr/lib/git-core/git-sh-prompt
+    GIT_PS1_SHOWDIRTYSTATE=t
+    GIT_PS1_SHOWUPSTREAM=auto
+
+    PS1_SHOWGITSTATUS=t
+fi
+
+export PROMPT_COMMAND=__refresh-terminal