Add script 'release/update-manpages' to generate manpages

Debian package started to ship manpages for repo since 2.8 [1]
And it's about for one year. So I think it should be upstreamed.

The script depends on help2man, which is available in both debian [2]
and ubuntu [3].

[1] https://tracker.debian.org/news/1150858/accepted-repo-28-1-source-into-unstable
[2] https://tracker.debian.org/pkg/help2man
[3] https://launchpad.net/ubuntu/+source/help2man

Change-Id: Ide2b356d0944ebde34cc96c6d5a782655bd72288
Signed-off-by: Roger Shimizu <rosh@debian.org>
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/309782
Reviewed-by: Mike Frysinger <vapier@google.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/man/repo-help.1 b/man/repo-help.1
new file mode 100644
index 00000000..d6da3c51
--- /dev/null
+++ b/man/repo-help.1
@@ -0,0 +1,33 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man.
+.TH REPO "1" "July 2021" "repo help" "Repo Manual"
+.SH NAME
+repo \- repo help - manual page for repo help
+.SH SYNOPSIS
+.B repo
+\fI\,help \/\fR[\fI\,--all|command\/\fR]
+.SH DESCRIPTION
+Summary
+.PP
+Display detailed help on a command
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+show this help message and exit
+.TP
+\fB\-a\fR, \fB\-\-all\fR
+show the complete list of commands
+.TP
+\fB\-\-help\-all\fR
+show the \fB\-\-help\fR of all commands
+.SS Logging options:
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+show all output
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+only show errors
+.PP
+Run `repo help help` to view the detailed manual.
+.SH DETAILS
+.PP
+Displays detailed usage information about a command.