.\"
.\" Copyright (c) 2018 Stefan Sperling
.\"
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.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
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.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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.Dd $Mdocdate$
.Dt TOG 1
.Os
.Sh NAME
.Nm tog
.Nd git repository browser
.Sh SYNOPSIS
.Nm
.Ar command
.Op Fl h
.Op Ar arg ...
.Sh DESCRIPTION
.Nm
is an interactive read-only browser for git repositories.
This repository format is described in
.Xr git-repository 5 .
.Pp
.Nm
supports several types of views which display repository data:
.Bl -tag -width Ds
.It Cm log view
Displays commits in the repository's history.
This view is displayed initially if no
.Ar command
is specified.
.It Cm diff view
Displays changes made in a particular commit.
.It Cm blame view
Displays the line-by-line history of a file.
.It Cm tree view
Displays the tree corresponding to a particular commit.
.El
.Pp
.Nm
provides global and command-specific key bindings and options.
The global key bindings are:
.Bl -tag -width Ds
.It Cm Q
Quit
.Nm .
.It Cm q
Quit the view which is in focus.
.It Cm Tab
Switch focus between views.
.It Cm f
Toggle fullscreen mode for a split-screen view.
.El
.Pp
Global options must precede the command name, and are as follows:
.Bl -tag -width tenletters
.It Fl h
Display usage information.
.El
.Pp
The commands for
.Nm
are as follows:
.Bl -tag -width blame
.It Cm log [ Fl c Ar commit ] [ Fl r Ar repository-path ] [ path ]
Display history of a repository.
If a
.Ar path
is specified, show only commits which modified this path.
.Pp
This command is also executed if no explicit command is specified.
.Pp
The key bindings for
.Cm tog log
are as follows:
.Bl -tag -width Ds
.It Cm Down-arrow, j, Page-down
Move the selection cursor down.
.It Cm Up-arrow, k, Page-up
Move the selection cursor up.
.It Cm Enter
Open a
.Cm diff
view showing file changes made in the currently selected commit.
.It Cm t
Open a 
.Cm tree
view showing the tree for the currently selected commit.
.It Cm Backspace
Show log entries for the parent directory of the currently selected path.
.El
.Pp
The options for
.Cm tog log
are as follows:
.Bl -tag -width Ds
.It Fl c Ar commit
Start traversing history at the specified
.Ar commit .
The expected argument is the name of a branch or a SHA1 hash which corresponds
to a commit object.
.It Fl r Ar repository-path
Use the repository at the specified path.
If not specified, assume the repository is located at or above the current
working directory.
.El
.It Cm diff [ Ar repository-path ] Ar object1 Ar object2
Display the differences between two objects in the repository.
Each
.Ar object
argument is a SHA1 hash which corresponds to the object.
Both objects must be of the same type (blobs, trees, or commits).
If the
.Ar repository path
is omitted, use the current working directory.
.Pp
The key bindings for
.Cm tog diff
are as follows:
.Bl -tag -width Ds
.It Cm Down-arrow, j, Page-down, Space
Scroll down.
.It Cm Up-arrow, k, Page-up
Scroll up.
.It Cm [
Reduce the amount of diff context lines.
.It Cm ]
Increase the amount of diff context lines.
.El
.It Cm blame [ Fl c Ar commit ] [ Fl r Ar repository-path ] Ar path
Display line-by-line history of a file at the specified path.
.Pp
The key bindings for
.Cm tog blame
are as follows:
.Bl -tag -width Ds
.It Cm Down-arrow, j, Page-down, Space
Move the selection cursor down.
.It Cm Up-arrow, k, Page-up
Move the selection cursor up.
.It Cm Enter
Open a
.Cm diff
view for the currently selected line's commit.
.It Cm b
Reload the
.Cm blame
view with the version of the file as found in the currently
selected line's commit.
.It Cm p
Reload the
.Cm blame
view with the version of the file as found in the parent commit of the
currently selected line's commit.
.It Cm B
Reload the
.Cm blame
view with the previously blamed commit.
.El
.Pp
The options for
.Cm tog blame
are as follows:
.Bl -tag -width Ds
.It Fl c Ar commit
Start traversing history at the specified
.Ar commit .
The expected argument is the name of a branch or a SHA1 hash which corresponds
to a commit object.
.It Fl r Ar repository-path
Use the repository at the specified path.
If not specified, assume the repository is located at or above the current
working directory.
.El
.It Cm tree [ Fl c Ar commit ] [ Ar repository-path ]
Display the repository tree.
If the
.Ar repository path
is omitted, assume the repository is located in the current working directory.
.Pp
The key bindings for
.Cm tog tree
are as follows:
.Bl -tag -width Ds
.It Cm Down-arrow, j, Page-down
Move the selection cursor down.
.It Cm Up-arrow, k, Page-up
Move the selection cursor up.
.It Cm Enter
Enter the currently selected directory, or switch to the
.Cm blame
view for the currently selected file.
.It Cm l
Open a
.Cm log
view for the currently selected tree entry.
.It Cm Backspace
Move back to the parent directory.
.It Cm i
Show object IDs for all objects displayed in the
.Cm tree
view.
.El
.Pp
The options for
.Cm tog tree
are as follows:
.Bl -tag -width Ds
.It Fl c Ar commit
Start traversing history at the specified
.Ar commit .
The expected argument is the name of a branch or a SHA1 hash which corresponds
to a commit object.
.El
.El
.Sh EXIT STATUS
.Ex -std tog
.Sh SEE ALSO
.Xr git-repository 5
.Sh AUTHORS
.An Stefan Sperling Aq Mt stsp@openbsd.org