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Introduce globals for demonstration

Alois Mahdal 1 year ago
parent
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7a1a1a3c0e
1 changed files with 22 additions and 2 deletions
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      99bottles.sh

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99bottles.sh View File

@@ -16,6 +16,26 @@
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 #   [99b]: http://99-bottles-of-beer.net/language-bash-1831.html
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 #
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+#
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+# Default transition mode
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+#
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+# 'standard' to use the standard form; 'careless' to have the
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+# song consider effects of gravity on the bottles.
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+#
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+# Default is 'standard'.
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+#
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+NN_BOTTLES__MODE=${NN_BOTTLES__MODE:-standard}
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+
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+#
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+# Starting bottle amount
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+#
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+# Initial amount of bottles specified as numeral.  Numerals up
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+# to 99 are supported.
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+#
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+# Default is 'ninety-nine'.
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+#
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+NN_STARTING_AMOUNT=${NN_STARTING_AMOUNT:-ninety-nine}
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+
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 pred() {
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     #
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     # Get predecessor to a number $1
@@ -215,8 +235,8 @@ syllables() {
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 main() {
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     local TransitionLine    # transition line between verses
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-    local togo              # bottles to go
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-    local mode=standard     # transition mode
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+    local togo=$NN_STARTING_AMOUNT  # bottles to go
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+    local mode=$NN_BOTTLES__MODE    # transition mode
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     while true; do case $1 in
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         --careless)     mode=careless; shift ;;
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         *)              break ;;