finish support and docs for DGIT_SSH etc. config

1 files changed, 34 insertions, 0 deletions

diff --git a/dgit.1 b/dgit.1
index 2f7cecc..11e2a5d 100644
--- a/dgit.1
+++ b/dgit.1
@@ -237,11 +237,27 @@ Specifies alternative programs to use instead of
 .BR dpkg-genchanges ,
 .BR sbuild ,
 .BR gpg ,
+.BR ssh ,
 or
 .BR mergechanges .
 
 For dpkg-buildpackage, dpkg-genchanges, mergechanges and sbuild,
 this applies only when the program is invoked directly by dgit.
+
+For ssh, the default value is taken from the
+.B DGIT_SSH
+or
+.B GIT_SSH
+environment variables, if set (see below).  And, for ssh, when accessing the
+archive and dgit-repos, this command line setting is overridden by the
+git config variables
+.BI dgit-distro. distro .ssh
+and
+.B .dgit.default.ssh
+(which can in turn be overridden with -c).  Also, when dgit is using
+git to access dgit-repos, only git's idea of what ssh to use (eg,
+.BR GIT_SSH )
+is relevant.
 .TP
 .RI \fB--dget:\fR option |\fB--dput:\fR option |...
 Specifies a single additional option to pass to
@@ -252,6 +268,7 @@ Specifies a single additional option to pass to
 .BR dpkg-buildpackage ,
 .BR dpkg-genchanges ,
 .BR sbuild ,
+.BR ssh ,
 or
 .BR mergechanges .
 Can be repeated as necessary.
@@ -261,6 +278,8 @@ this applies only when the program is invoked directly by dgit.
 Usually, for passing options to dpkg-genchanges, you should use
 .BR --ch: \fIoption\fR.
 
+See note above regarding ssh.
+
 NB that --gpg:option is not supported (because debsign does not
 have that facility).  But see -k.
 .TP
@@ -547,6 +566,21 @@ on the dgit command line.
 .BR dgit.default. *
 for each
 .BR dgit-distro. \fIdistro\fR . *
+.SH ENVIRONMENT VARIABLES
+.TP
+.BR DGIT_SSH ", " GIT_SSH
+specify an alternative default program (and perhaps arguments) to use
+instead of ssh.  DGIT_SSH is consulted first and may contain arguments;
+if it contains any whitespace will be passed to the shell.  GIT_SSH
+specifies just the program; no arguments can be specified, so dgit
+interprets it the same way as git does.
+See
+also the --ssh= and --ssh: options.
+.TP
+.BR gpg ", " dpkg- "..., " debsign ", " git ", " dget ", " dput ", " LWP::UserAgent
+and other subprograms and modules used by dgit are affected by various
+environment variables.  Consult the documentaton for those programs
+for details.
 .SH BUGS
 We should be using some kind of vhost/vpath setup for the git repos on
 alioth, so that they can be moved later if and when this turns out to