The core.autocrlf variable can take on three values: false, true,
and input.  Parsing it as a boolean is wrong, we instead need to
parse a tri-state enumeration.

Add support for parsing and setting enum values from Java from and
to the text based configuration file, and use that to handle the
autocrlf variable.

Bug: 301775
Change-Id: I81b9e33087a33d2ef2eac89ba93b9e83b7ecc223
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

Currently, if a branch is created that has special chars ('#' in the bug),
Config will surround the subsection name with double quotes during
it's toText method which will result in an invalid file after saving the
Config.

Bug: 318249
Change-Id: I0a642f52def42d936869e4aaaeb6999567901001
Signed-off-by: Mathias Kinzler <mathias.kinzler@sap.com>

Currently, there is no way to read the content
of the Git Configuration in a  way that would
allow to list all configured values generically.
This change extends the Config class in such a
way as to being able to get a list of sections and
to get a list of names for any given section or
subsection.
This is required in able to implement proper
configuration handling in EGit (show all the
content of a given configuration similar to 
"git config -l").

Change-Id: Idd4bc47be18ed0e36b11be8c23c9c707159dc830
Signed-off-by: Mathias Kinzler <mathias.kinzler@sap.com>

On Windows, FS_Win32_Cygwin has been used if a Cygwin Git installation
is present in the PATH. Assuming that the user works with the Cygwin
Git installation may result in unnecessary overhead if he actually
does not.

Applications built on top of jgit may have more knowledge on the
actually used Git client (Cygwin or not) and hence should be able to
configure which FS to use accordingly.

Change-Id: Ifc4278078b298781d55cf5421e9647a21fa5db24

The unsetSection method can be used to delete an entire configuration
block, such as a [branch ""] or [remote ""] section in a file.

Change-Id: I93390c9b2187eb1b0d51353518feaed83bed2aad
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>

Config was confusing the following two variables when writing the
file back to text format:

  [my]
    empty =
    enabled

When parsed, we say that my.empty has 1 value, null, and my.enabled
is an empty string value that in boolean context should be evaluated
as true.

Saving this configuration file back to text format was ignoring the
null value for my.empty, producing a completely different file than
what Config read:

  [my]
    empty
    enabled

Instead handle the writing differently to ensure the original format
is output.  New tests cases cover the expected behavior and return
values from accessor methods.

Change-Id: Id37379ce20cb27e3330923cf989444dd9f2bdd96
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

Change-Id: I07014d1b8cc2fab0761d644a12e4ae04f0adf3ef
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

Per CQ 3448 this is the initial contribution of the JGit project
to eclipse.org.  It is derived from the historical JGit repository
at commit 3a2dd9921c.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>