diff tests/test-alias.t @ 11989:f853873fc66d

aliases: provide more flexible ways to work with shell alias arguments

This patch changes the functionality of shell aliases to add more powerful
options for working with shell alias arguments.

First: the alias name + arguments to a shell alias are set as an HG_ARGS
environment variable, delimited by spaces. This matches the behavior of hooks.

Second: any occurrences of "$@" (without quotes) are replaced with the
arguments, separated by spaces. This happens *before* the alias gets to the shell.

Third: any positive numeric variables ("$1", "$2", etc) are replaced with the
appropriate argument, indexed from 1. "$0" is replaced with the name of the
alias. Any "extra" numeric variables are replaced with an empty string.  This
happens *before* the alias gets to the shell.

These changes allow for more flexible shell aliases:

    [alias]
    echo = !echo $@
    count = !hg log -r "$@" --template='.' | wc -c | sed -e 's/ //g'
    qqueuemv = !mv "`hg root`/.hg/patches-$1" "`hg root`/.hg/patches-$2"

In action:

    $ hg echo foo
    foo

    $ hg count 'branch(default)'
    901

    $ hg count 'branch(stable) and keyword(fixes)'
    102

    $ hg qqueuemv myfeature somefeature

--- a/tests/test-alias.t	Wed Aug 18 18:18:26 2010 -0400
+++ b/tests/test-alias.t	Wed Aug 18 18:56:44 2010 -0400
@@ -16,7 +16,13 @@
   > dln = lognull --debug
   > nousage = rollback
   > put = export -r 0 -o "\$FOO/%R.diff"
-  > echo = !echo
+  > blank = !echo
+  > self = !echo '\$0'
+  > echo = !echo '\$@'
+  > echo1 = !echo '\$1'
+  > echo2 = !echo '\$2'
+  > echo13 = !echo '\$1' '\$3'
+  > count = !hg log -r '\$@' --template='.' | wc -c | sed -e 's/ //g'
   > rt = root
   > 
   > [defaults]
@@ -146,10 +152,35 @@
   +foo
 
 
-shell aliases
+simple shell aliases
 
+  $ hg blank
+  
+  $ hg blank foo
+  
+  $ hg echo
+  
+  $ hg self
+  self
   $ hg echo foo
   foo
+  $ hg echo 'test $2' foo
+  test $2 foo
+  $ hg echo1 foo bar baz
+  foo
+  $ hg echo2 foo bar baz
+  bar
+  $ hg echo13 foo bar baz test
+  foo baz
+  $ hg echo2 foo
+  
+  $ echo bar > bar
+  $ hg ci -qA -m bar
+  $ hg count .
+  1
+  $ hg count 'branch(default)'
+  2
+
 
 invalid arguments