Merge pull request #5 from woodstok/prompt

cmdline filter

README.md

@@ -191,6 +191,15 @@ bind-key -n M-l run-shell -b "$HOME/.tmux-butler/modes/quetty-filter -start line
 ```
 bind-key -n M-l run-shell -b "$HOME/.tmux-butler/modes/quetty-filter -start ip"
 ```
+##### modes/quetty-filter -start cmdline #####
+The cmdline filter matches default bash prompt regexes to select all bash commands visible in the current window.
+The filter tries to match a regex `^\[.*\](#|$)` which  is the default bash prompt in many installations.
+In addition to the default prompt, you can also specify your shell custom prompt using the environment variable `CUSTOMPROMPT` in `~/.butlerrc`.
+eg:
+```
+CUSTOMPROMPT='λ '
+```
+This will search for prompts matching the regex at the beginning of a line, in addition to the default prompt regexes.
 
 ##### modes/tmuxbuffers #####
 Show and select from tmux buffer list

filters/cmdline

@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+# common bash prompt
+
+# Load the CUSTOMPROMPT env variable from rc files if any
+SCRIPTDIR="$( cd "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )/.."
+rcfile=$HOME/.butlerrc
+if [[ -f "$rcfile" ]]
+then
+        source $rcfile
+fi
+
+# load defaults that are not already set
+source $SCRIPTDIR/.butlerrc-defaults
+
+# OR all the prompt regexes
+defaultBashPrompt1='\[.*\]\$'
+defaultBashPrompt2='\[.*\]#'
+regexlist=( $defaultBashPrompt1 $defaultBashPrompt2 )
+# custom prompt
+if [[ -n "$CUSTOMPROMPT" ]]
+then
+        regexlist+=( "$CUSTOMPROMPT" )
+fi
+
+promptRegex="^("
+first="1"
+for regex in "${regexlist[@]}"
+do
+
+        if [[ "$first" != "1" ]]
+        then
+                promptRegex="$promptRegex|"
+        fi
+        promptRegex="$promptRegex($regex)"
+        first=0
+done
+promptRegex="$promptRegex)"
+
+# grep and remove leading/trailing whitespace
+egrep -E -o "$promptRegex.*$" | sed -Ee "s/$promptRegex[[:space:]]*//" -e 's/[[:space:]]*$//'