tests/svn/svndump-empty.sh

color: turn 'ui.color' into a boolean (auto or off)

Previously, 'ui.color=yes' meant "always show color", While
"ui.color=auto" meant "use color automatically when it appears
sensible".

This feels problematic to some people because if an administrator has
disabled color with "ui.color=off", and a user turn it back  on using
"color=on", it will get surprised (because it breaks their output when
redirected to a file.) This patch changes ui.color=true to only move the
default value of --color from "never" to "auto".

I'm not really in favor of this changes as I suspect the above case will
be pretty rare and I would rather keep the logic simpler. However, I'm
providing this patch to help the 4.2 release in the case were others
decide to make this changes.

Users that want to force colors without specifying --color on the
command line can use the 'ui.formatted' config knob, which had to be
enabled in a handful of tests for this patch.

Nice summary table (credit: Augie Fackler)

That is, before this patch:

+--------------------+--------------------+--------------------+
|                    | not a tty          | a tty              |
|                    | --color not set    | --color not set    |
|                    |                    |                    |
+--------------------+--------------------+--------------------+
| [ui]               |                    |                    |
| color (not set)    | no color           | no color           |
|                    |                    |                    |
+--------------------+--------------------+--------------------+
| [ui]               |                    |                    |
| color = auto       | no color           | color              |
|                    |                    |                    |
+--------------------+--------------------+--------------------+
| [ui]               |                    |                    |
| color = yes        | *color*            | color              |
|                    |                    |                    |
+--------------------+--------------------+--------------------+
| [ui]               |                    |                    |
| color = no         | no color           | no color           |
|                    |                    |                    |
+--------------------+--------------------+--------------------+
(if --color is specified, it always clobbers the setting in [ui])

and after this patch:

+--------------------+--------------------+--------------------+
|                    | not a tty          | a tty              |
|                    | --color not set    | --color not set    |
|                    |                    |                    |
+--------------------+--------------------+--------------------+
| [ui]               |                    |                    |
| color (not set)    | no color           | no color           |
|                    |                    |                    |
+--------------------+--------------------+--------------------+
| [ui]               |                    |                    |
| color = auto       | no color           | color              |
|                    |                    |                    |
+--------------------+--------------------+--------------------+
| [ui]               |                    |                    |
| color = yes        | *no color*         | color              |
|                    |                    |                    |
+--------------------+--------------------+--------------------+
| [ui]               |                    |                    |
| color = no         | no color           | no color           |
|                    |                    |                    |
+--------------------+--------------------+--------------------+
(if --color is specified, it always clobbers the setting in [ui])

#!/bin/sh
#
# Use this script to generate empty.svndump
#

mkdir temp
cd temp

mkdir project-orig
cd project-orig
mkdir trunk
mkdir branches
mkdir tags
cd ..

svnadmin create svn-repo
svnurl=file://`pwd`/svn-repo
svn import project-orig $svnurl -m "init projA"

svn co $svnurl project
cd project
mkdir trunk/dir
echo a > trunk/dir/a
svn add trunk/dir
svn ci -m adddir

echo b > trunk/b
svn add trunk/b
svn ci -m addb

echo c > c
svn add c
svn ci -m addc
cd ..

# svnsync repo/trunk/dir only so the last two revisions are empty
svnadmin create svn-empty
cat > svn-empty/hooks/pre-revprop-change <<EOF
#!/bin/sh
exit 0
EOF
chmod +x svn-empty/hooks/pre-revprop-change
svnsync init --username svnsync file://`pwd`/svn-empty file://`pwd`/svn-repo/trunk/dir
svnsync sync file://`pwd`/svn-empty
svn log -v file://`pwd`/svn-empty

svnadmin dump svn-empty > ../empty.svndump