Initial support for context and focus (see Issue #218).

AUTHORS

@@ -85,6 +85,7 @@ The following submitted code, packages or analysis, and deserve special thanks:
   Jakub Wilk
   Russell Steicke
   YBSAR
+  Ben Armstrong
 
 Thanks to the following, who submitted detailed bug reports and excellent
 suggestions:

scripts/bash/context

@@ -0,0 +1,36 @@
+#!/bin/bash
+# - These filters not modified, as their purpose is for special review
+#   not dependent on context or focus:
+#   - report.all.filter
+#   - report.completed.filter status:completed
+# - What is this -FILTER about in my filters?
+#   - In each filter, we negate a non-existent virtual tag -FILTER that
+#     doesn't change what the filter matches but does add a recognizable
+#     marker. This is used later to substitute the filter with a new one when
+#     it changes.
+#   - CAUTION: do not add any additional (i.e. non-context, non-focus) material
+#     after -FILTER in the report filter variables or else it will be lost next
+#     time the context or focus is changed.
+script_path=$(dirname ${0})
+. "${script_path}/task_functions.sh"
+
+filter_type=$(basename ${0})
+task_config "${filter_type}.current" "${@}"
+context=$(task_get context.current)
+focus=$(task_get focus.current)
+colored_context="$(task_color 'white on red' ${context})"
+colored_focus="$(task_color 'white on blue' ${focus})"
+filter="${context} ${focus}"
+
+filter_vars=$(task_vars filter)
+filter_vars=${filter_vars/report.all.filter/}
+filter_vars=${filter_vars/report.completed.filter/}
+for var in ${filter_vars}; do
+    old_value=$(task_get ${var})
+    old_value=${old_value/%-FILTER*/}
+    task_config ${var} ${old_value} -FILTER ${filter}
+done
+
+task_config "shell.prompt" "${colored_context}:${colored_focus}>"
+
+echo "Filter applied to reports and add: ${filter}"

scripts/bash/focus

@@ -0,0 +1 @@
+context

scripts/bash/task_functions.sh

@@ -0,0 +1,26 @@
+CONFIRM_PROMPT='are you sure'
+task_config ()
+{
+    var="${1}"
+    shift
+    value="${@}"
+    echo y | task config $var "$value" | grep -iv "$CONFIRM_PROMPT"
+}
+task_vars ()
+{
+    task _show | grep "^.*${1}.*=" | cut -d'=' -f1
+}
+task_get ()
+{
+    task _show | grep "^${1}=" | cut -d'=' -f2
+}
+task_color ()
+{
+    color="${1}"
+    shift
+    text="${@}"
+    task rc.verbose=nothing rc._forcecolor=yes color ${color} | grep 'task color' | \
+       tail -n 1 | sed -e 's/^  //' -e "s/task color ${color}/${text}/"
+}
+
+