*
* DESCRIPTION
* -----------
- * Browse changes in a git repository.
+ * Browse changes in a git repository. Additionally, tig(1) can also act
+ * as a pager for output of various git commands.
+ *
+ * When browsing repositories, tig(1) uses the underlying git commands
+ * to present the user with various views, such as summarized commit log
+ * and showing the commit with the log message, diffstat, and the diff.
+ *
+ * Using tig(1) as a pager, it will display input from stdin and try
+ * to colorize it.
**/
#ifndef VERSION
-#define VERSION "tig-0.1"
+#define VERSION "tig-0.3"
#endif
#ifndef DEBUG
static void die(const char *err, ...);
static void report(const char *msg, ...);
-static void set_nonblocking_input(int boolean);
+static void set_nonblocking_input(bool loading);
#define ABS(x) ((x) >= 0 ? (x) : -(x))
#define MIN(x, y) ((x) < (y) ? (x) : (y))
/* This color name can be used to refer to the default term colors. */
#define COLOR_DEFAULT (-1)
+#define TIG_HELP "(d)iff, (l)og, (m)ain, (q)uit, (h)elp, (Enter) show diff"
+
/* The format and size of the date column in the main view. */
#define DATE_FORMAT "%Y-%m-%d %H:%M"
#define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
/* The default interval between line numbers. */
#define NUMBER_INTERVAL 1
+#define TABSIZE 8
+
#define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
/* Some ascii-shorthands fitted into the ncurses namespace. */
#define KEY_RETURN '\r'
#define KEY_ESC 27
+
/* User action requests. */
enum request {
/* Offset all requests to avoid conflicts with ncurses getch values. */
REQ_QUIT,
REQ_PROMPT,
REQ_SCREEN_REDRAW,
+ REQ_SCREEN_RESIZE,
REQ_SCREEN_UPDATE,
REQ_SHOW_VERSION,
REQ_STOP_LOADING,
REQ_VIEW_NEXT,
REQ_MOVE_UP,
+ REQ_MOVE_UP_ENTER,
REQ_MOVE_DOWN,
+ REQ_MOVE_DOWN_ENTER,
REQ_MOVE_PAGE_UP,
REQ_MOVE_PAGE_DOWN,
REQ_MOVE_FIRST_LINE,
REQ_SCROLL_PAGE_DOWN,
};
+struct ref {
+ char *name; /* Ref name; tag or head names are shortened. */
+ char id[41]; /* Commit SHA1 ID */
+ unsigned int tag:1; /* Is it a tag? */
+ unsigned int next:1; /* For ref lists: are there more refs? */
+};
+
struct commit {
char id[41]; /* SHA1 ID. */
char title[75]; /* The first line of the commit message. */
char author[75]; /* The author of the commit. */
struct tm time; /* Date from the author ident. */
+ struct ref **refs; /* Repository references; tags & branch heads. */
};
+
/*
* String helpers
*/
#define string_copy(dst, src) \
string_ncopy(dst, src, sizeof(dst))
+
/* Shell quoting
*
* NOTE: The following is a slightly modified copy of the git project's shell
* -------
**/
-static int opt_line_number = FALSE;
+/* Option and state variables. */
+static bool opt_line_number = FALSE;
static int opt_num_interval = NUMBER_INTERVAL;
+static int opt_tab_size = TABSIZE;
static enum request opt_request = REQ_VIEW_MAIN;
static char opt_cmd[SIZEOF_CMD] = "";
static FILE *opt_pipe = NULL;
/**
* -l::
- * Start up in log view.
+ * Start up in log view using the internal log command.
**/
if (!strcmp(opt, "-l")) {
opt_request = REQ_VIEW_LOG;
/**
* -d::
- * Start up in diff view.
+ * Start up in diff view using the internal diff command.
**/
if (!strcmp(opt, "-d")) {
opt_request = REQ_VIEW_DIFF;
continue;
}
+ /**
+ * -t[NSPACES], --tab-size[=NSPACES]::
+ * Set the number of spaces tabs should be expanded to.
+ **/
+ if (!strncmp(opt, "-t", 2) ||
+ !strncmp(opt, "--tab-size", 10)) {
+ char *num = opt;
+
+ if (opt[1] == 't') {
+ num = opt + 2;
+
+ } else if (opt[STRING_SIZE("--tab-size")] == '=') {
+ num = opt + STRING_SIZE("--tab-size=");
+ }
+
+ if (isdigit(*num))
+ opt_tab_size = MIN(atoi(num), TABSIZE);
+ continue;
+ }
+
/**
* -v, --version::
* Show version and exit.
/**
* \--::
- * End of tig(1) options. Useful when specifying commands
- * for the main view. Example:
+ * End of tig(1) options. Useful when specifying command
+ * options for the main view. Example:
*
* $ tig -- --since=1.month
**/
}
/**
- * log [options]::
+ * log [git log options]::
* Open log view using the given git log options.
*
- * diff [options]::
+ * diff [git diff options]::
* Open diff view using the given git diff options.
*
- * show [options]::
+ * show [git show options]::
* Open diff view using the given git show options.
**/
if (!strcmp(opt, "log") ||
break;
}
- /* Make stuff like:
+ /**
+ * [git log options]::
+ * tig(1) will stop the option parsing when the first
+ * command line parameter not starting with "-" is
+ * encountered. All options including this one will be
+ * passed to git log when loading the main view.
+ * This makes it possible to say:
*
* $ tig tag-1.0..HEAD
- *
- * work. */
+ **/
if (opt[0] && opt[0] != '-')
break;
/**
* Git command options
* ~~~~~~~~~~~~~~~~~~~
- *
* All git command options specified on the command line will
* be passed to the given command and all will be shell quoted
- * before used.
+ * before they are passed to the shell.
*
- * NOTE: It is possible to specify options even for the main
- * view. If doing this you should not touch the --pretty
- * option.
+ * NOTE: If you specify options for the main view, you should
+ * not use the `--pretty` option as this option will be set
+ * automatically to the format expected by the main view.
*
* Example on how to open the log view and show both author and
* committer information:
*
* $ tig log --pretty=fuller
+ *
+ * See the <<refspec, "Specifying revisions">> section below
+ * for an introduction to revision options supported by the git
+ * commands. For details on specific git command options, refer
+ * to the man page of the command in question.
**/
if (opt_request == REQ_VIEW_MAIN)
}
-/**
- * KEYS
- * ----
- **/
-
-#define HELP "(d)iff, (l)og, (m)ain, (q)uit, (v)ersion, (h)elp"
-
-struct keymap {
- int alias;
- int request;
-};
-
-struct keymap keymap[] = {
- /**
- * View switching
- * ~~~~~~~~~~~~~~
- * d::
- * Switch to diff view.
- * l::
- * Switch to log view.
- * m::
- * Switch to main view.
- * p::
- * Switch to pager view.
- * h::
- * Show man page.
- * Return::
- * If in main view split the view
- * and show the diff in the bottom view.
- * Tab::
- * Switch to next view.
- **/
- { 'm', REQ_VIEW_MAIN },
- { 'd', REQ_VIEW_DIFF },
- { 'l', REQ_VIEW_LOG },
- { 'p', REQ_VIEW_PAGER },
- { 'h', REQ_VIEW_HELP },
-
- { KEY_TAB, REQ_VIEW_NEXT },
- { KEY_RETURN, REQ_ENTER },
-
- /**
- * Cursor navigation
- * ~~~~~~~~~~~~~~~~~
- * Up, k::
- * Move curser one line up.
- * Down, j::
- * Move cursor one line down.
- * Page Up::
- * Move curser one page up.
- * Page Down::
- * Move cursor one page down.
- * Home::
- * Jump to first line.
- * End::
- * Jump to last line.
- **/
- { KEY_UP, REQ_MOVE_UP },
- { 'k', REQ_MOVE_UP },
- { KEY_DOWN, REQ_MOVE_DOWN },
- { 'j', REQ_MOVE_DOWN },
- { KEY_HOME, REQ_MOVE_FIRST_LINE },
- { KEY_END, REQ_MOVE_LAST_LINE },
- { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
- { KEY_PPAGE, REQ_MOVE_PAGE_UP },
-
- /**
- * Scrolling
- * ~~~~~~~~~
- * Insert::
- * Scroll view one line up.
- * Delete::
- * Scroll view one line down.
- * w::
- * Scroll view one page up.
- * s::
- * Scroll view one page down.
- **/
- { KEY_IC, REQ_SCROLL_LINE_UP },
- { KEY_DC, REQ_SCROLL_LINE_DOWN },
- { 'w', REQ_SCROLL_PAGE_UP },
- { 's', REQ_SCROLL_PAGE_DOWN },
-
- /**
- * Misc
- * ~~~~
- * q, Escape::
- * Quit
- * r::
- * Redraw screen.
- * z::
- * Stop all background loading.
- * v::
- * Show version.
- * n::
- * Toggle line numbers on/off.
- * ':'::
- * Open prompt. This allows you to specify what git command to run.
- * Example:
- *
- * :log -p
- *
- **/
- { KEY_ESC, REQ_QUIT },
- { 'q', REQ_QUIT },
- { 'z', REQ_STOP_LOADING },
- { 'v', REQ_SHOW_VERSION },
- { 'r', REQ_SCREEN_REDRAW },
- { 'n', REQ_TOGGLE_LINE_NUMBERS },
- { ':', REQ_PROMPT },
-
- /* wgetch() with nodelay() enabled returns ERR when there's no input. */
- { ERR, REQ_SCREEN_UPDATE },
-};
-
-static enum request
-get_request(int key)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(keymap); i++)
- if (keymap[i].alias == key)
- return keymap[i].request;
-
- return (enum request) key;
-}
-
-
/*
* Line-oriented content detection.
*/
LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
-LINE(DIFF_OLDMODE, "old mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
-LINE(DIFF_NEWMODE, "new mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
+LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
+LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
LINE(DIFF_COPY, "copy ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
LINE(DIFF_RENAME, "rename ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
LINE(DIFF_SIM, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
-LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0),
+LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
+LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
+LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD),
enum line_type {
#define LINE(type, line, fg, bg, attr) \
}
-/*
- * Viewer
- */
+/**
+ * ENVIRONMENT VARIABLES
+ * ---------------------
+ * Several options related to the interface with git can be configured
+ * via environment options.
+ *
+ * Repository references
+ * ~~~~~~~~~~~~~~~~~~~~~
+ * Commits that are referenced by tags and branch heads will be marked
+ * by the reference name surrounded by '[' and ']':
+ *
+ * 2006-03-26 19:42 Petr Baudis | [cogito-0.17.1] Cogito 0.17.1
+ *
+ * If you want to filter out certain directories under `.git/refs/`, say
+ * `tmp` you can do it by setting the following variable:
+ *
+ * $ TIG_LS_REMOTE="git ls-remote . | sed /\/tmp\//d" tig
+ *
+ * Or set the variable permanently in your environment.
+ *
+ * TIG_LS_REMOTE::
+ * Set command for retrieving all repository references. The command
+ * should output data in the same format as git-ls-remote(1).
+ **/
+
+#define TIG_LS_REMOTE \
+ "git ls-remote . 2>/dev/null"
+
+/**
+ * [[view-commands]]
+ * View commands
+ * ~~~~~~~~~~~~~
+ * It is possible to alter which commands are used for the different views.
+ * If for example you prefer commits in the main view to be sorted by date
+ * and only show 500 commits, use:
+ *
+ * $ TIG_MAIN_CMD="git log --date-order -n500 --pretty=raw %s" tig
+ *
+ * Or set the variable permanently in your environment.
+ *
+ * Notice, how `%s` is used to specify the commit reference. There can
+ * be a maximum of 5 `%s` ref specifications.
+ *
+ * TIG_DIFF_CMD::
+ * The command used for the diff view. By default, git show is used
+ * as a backend.
+ *
+ * TIG_LOG_CMD::
+ * The command used for the log view. If you prefer to have both
+ * author and committer shown in the log view be sure to pass
+ * `--pretty=fuller` to git log.
+ *
+ * TIG_MAIN_CMD::
+ * The command used for the main view. Note, you must always specify
+ * the option: `--pretty=raw` since the main view parser expects to
+ * read that format.
+ **/
+
+#define TIG_DIFF_CMD \
+ "git show --patch-with-stat --find-copies-harder -B -C %s"
+
+#define TIG_LOG_CMD \
+ "git log --cc --stat -n100 %s"
+
+#define TIG_MAIN_CMD \
+ "git log --topo-order --stat --pretty=raw %s"
+
+/* ... silently ignore that the following are also exported. */
+
+#define TIG_HELP_CMD \
+ "man tig 2>/dev/null"
+
+#define TIG_PAGER_CMD \
+ ""
+
+/**
+ * The viewer
+ * ----------
+ *
+ * tig(1) presents various 'views' of a repository. Each view is based on output
+ * from an external command, most often 'git log', 'git diff', or 'git show'.
+ *
+ * The main view::
+ * Is the default view, and it shows a one line summary of each commit
+ * in the chosen list of revision. The summary includes commit date,
+ * author, and the first line of the log message. Additionally, any
+ * repository references, such as tags, will be shown.
+ *
+ * The log view::
+ * Presents a more rich view of the revision log showing the whole log
+ * message and the diffstat.
+ *
+ * The diff view::
+ * Shows either the diff of the current working tree, that is, what
+ * has changed since the last commit, or the commit diff complete
+ * with log message, diffstat and diff.
+ *
+ * The pager view::
+ * Is used for displaying both input from stdin and output from git
+ * commands entered in the internal prompt.
+ *
+ * The help view::
+ * Displays the information from the tig(1) man page. For the help view
+ * to work you need to have the tig(1) man page installed.
+ **/
struct view {
const char *name; /* View name */
- const char *cmdfmt; /* Default command line format */
+ char *cmd_fmt; /* Default command line format */
+ char *cmd_env; /* Command line set via environment */
char *id; /* Points to either of ref_{head,commit} */
size_t objsize; /* Size of objects in the line index */
struct view_ops {
+ /* What type of content being displayed. Used in the
+ * title bar. */
+ char *type;
/* Draw one line; @lineno must be < view->height. */
bool (*draw)(struct view *view, unsigned int lineno);
/* Read one line; updates view->line. */
static struct view_ops pager_ops;
static struct view_ops main_ops;
-#define DIFF_CMD \
- "git show --patch-with-stat --find-copies-harder -B -C %s"
-
-#define LOG_CMD \
- "git log --cc --stat -n100 %s"
+static char ref_head[SIZEOF_REF] = "HEAD";
+static char ref_commit[SIZEOF_REF] = "HEAD";
-#define MAIN_CMD \
- "git log --stat --pretty=raw %s"
+#define VIEW_STR(name, cmd, env, ref, objsize, ops) \
+ { name, cmd, #env, ref, objsize, ops }
-#define HELP_CMD \
- "man tig 2> /dev/null"
-
-char ref_head[SIZEOF_REF] = "HEAD";
-char ref_commit[SIZEOF_REF] = "HEAD";
+#define VIEW_(id, name, ops, ref, objsize) \
+ VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, objsize, ops)
static struct view views[] = {
- { "main", MAIN_CMD, ref_head, sizeof(struct commit), &main_ops },
- { "diff", DIFF_CMD, ref_commit, sizeof(char), &pager_ops },
- { "log", LOG_CMD, ref_head, sizeof(char), &pager_ops },
- { "help", HELP_CMD, ref_head, sizeof(char), &pager_ops },
- { "pager", "", "static", sizeof(char), &pager_ops },
+ VIEW_(MAIN, "main", &main_ops, ref_head, sizeof(struct commit)),
+ VIEW_(DIFF, "diff", &pager_ops, ref_commit, sizeof(char)),
+ VIEW_(LOG, "log", &pager_ops, ref_head, sizeof(char)),
+ VIEW_(HELP, "help", &pager_ops, ref_head, sizeof(char)),
+ VIEW_(PAGER, "pager", &pager_ops, "static", sizeof(char)),
};
#define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
offset = 0;
foreach_view (view, i) {
+ /* Keep the size of the all view windows one lager than is
+ * required. This makes current line management easier when the
+ * cursor will go outside the window. */
if (!view->win) {
- view->win = newwin(view->height, 0, offset, 0);
+ view->win = newwin(view->height + 1, 0, offset, 0);
if (!view->win)
die("Failed to create %s view", view->name);
die("Failed to create title window");
} else {
- wresize(view->win, view->height, view->width);
+ wresize(view->win, view->height + 1, view->width);
mvwin(view->win, offset, 0);
mvwin(view->title, offset + view->height, 0);
wrefresh(view->win);
/* [main] ref: 334b506... - commit 6 of 4383 (0%) */
if (*view->ref)
- wprintw(view->title, "[%s] ref: %s", view->name, view->ref);
+ wprintw(view->title, "[%s] %s", view->name, view->ref);
else
wprintw(view->title, "[%s]", view->name);
if (view->lines) {
- char *type = view == VIEW(REQ_VIEW_MAIN) ? "commit" : "line";
-
wprintw(view->title, " - %s %d of %d (%d%%)",
- type,
+ view->ops->type,
view->lineno + 1,
view->lines,
(view->lineno + 1) * 100 / view->lines);
view->ops->draw(view, 0);
} else if (view->lineno >= view->offset + view->height) {
+ if (view->lineno == view->offset + view->height) {
+ /* Clear the hidden line so it doesn't show if the view
+ * is scrolled up. */
+ wmove(view->win, view->height, 0);
+ wclrtoeol(view->win);
+ }
view->lineno = view->offset + view->height - 1;
view->ops->draw(view, view->lineno - view->offset);
}
lines = view->lines - view->offset;
if (lines == 0 || view->offset + view->height >= view->lines) {
- report("Already on last line");
+ report("Cannot scroll beyond the last line");
return;
}
break;
lines = view->offset;
if (lines == 0) {
- report("Already on first line");
+ report("Cannot scroll beyond the first line");
return;
}
break;
case REQ_MOVE_UP:
+ case REQ_MOVE_UP_ENTER:
steps = -1;
break;
case REQ_MOVE_DOWN:
+ case REQ_MOVE_DOWN_ENTER:
steps = 1;
break;
}
if (steps <= 0 && view->lineno == 0) {
- report("Already on first line");
+ report("Cannot move beyond the first line");
return;
} else if (steps >= 0 && view->lineno + 1 >= view->lines) {
- report("Already on last line");
+ report("Cannot move beyond the last line");
return;
}
* invalid so clear it. */
view->ref[0] = 0;
} else {
- if (snprintf(view->cmd, sizeof(view->cmd), view->cmdfmt,
- id, id, id) >= sizeof(view->cmd))
+ char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
+
+ if (snprintf(view->cmd, sizeof(view->cmd), format,
+ id, id, id, id, id) >= sizeof(view->cmd))
return FALSE;
}
if (!view->pipe)
return;
set_nonblocking_input(FALSE);
- pclose(view->pipe);
+ if (view->pipe == stdin)
+ fclose(view->pipe);
+ else
+ pclose(view->pipe);
view->pipe = NULL;
}
view->line = tmp;
while ((line = fgets(buffer, sizeof(buffer), view->pipe))) {
- int linelen;
+ int linelen = strlen(line);
- linelen = strlen(line);
if (linelen)
line[linelen - 1] = 0;
}
}
- /* CPU hogilicious! */
- update_view_title(view);
-
if (redraw_from >= 0) {
/* If this is an incremental update, redraw the previous line
* since for commits some members could have changed when
redraw_view_from(view, redraw_from);
}
+ /* Update the title _after_ the redraw so that if the redraw picks up a
+ * commit reference in view->ref it'll be available here. */
+ update_view_title(view);
+
if (ferror(view->pipe)) {
report("Failed to read: %s", strerror(errno));
goto end;
time_t secs = time(NULL) - view->start_time;
if (view == VIEW(REQ_VIEW_HELP)) {
- report("%s", HELP);
+ char *msg = TIG_HELP;
+
+ if (view->lines == 0) {
+ /* Slightly ugly, but abusing view->ref keeps
+ * the error message. */
+ string_copy(view->ref, "No help available");
+ msg = "The tig(1) manpage is not installed";
+ }
+
+ report("%s", msg);
goto end;
}
current_view = nviews;
/* Blur out the title of the previous view. */
update_view_title(prev);
- report("Switching to %s view", view->name);
+ report("");
return;
}
}
resize_display();
- if (split && prev->lineno - prev->offset > prev->height) {
+ if (split && prev->lineno - prev->offset >= prev->height) {
/* Take the title line into account. */
- int lines = prev->lineno - prev->height + 1;
+ int lines = prev->lineno - prev->offset - prev->height + 1;
/* Scroll the view that was split if the current line is
* outside the new limited view. */
if (prev && view != prev) {
/* "Blur" the previous view. */
- update_view_title(prev);
+ if (!backgrounded)
+ update_view_title(prev);
/* Continue loading split views in the background. */
if (!split)
report("Loading...");
} else {
redraw_view(view);
- report("");
+ if (view == VIEW(REQ_VIEW_HELP))
+ report("%s", TIG_HELP);
+ else
+ report("");
}
+
+ /* If the view is backgrounded the above calls to report()
+ * won't redraw the view title. */
+ if (backgrounded)
+ update_view_title(view);
}
open_view(view, request, OPEN_DEFAULT);
break;
+ case REQ_MOVE_UP_ENTER:
+ case REQ_MOVE_DOWN_ENTER:
+ move_view(view, request);
+ /* Fall-through */
+
case REQ_ENTER:
if (!view->lines) {
report("Nothing to enter");
current_view = next_view;
/* Blur out the title of the previous view. */
update_view_title(view);
- report("Switching to %s view", display[current_view]->name);
+ report("");
break;
}
case REQ_TOGGLE_LINE_NUMBERS:
opt_line_number = !opt_line_number;
redraw_view(view);
+ update_view_title(view);
break;
case REQ_PROMPT:
case REQ_STOP_LOADING:
foreach_view (view, i) {
if (view->pipe)
- report("Stopped loaded of %s view", view->name),
+ report("Stopped loaded the %s view", view->name),
end_update(view);
}
break;
report("Version: %s", VERSION);
return TRUE;
+ case REQ_SCREEN_RESIZE:
+ resize_display();
+ /* Fall-through */
case REQ_SCREEN_REDRAW:
- redraw_view(view);
+ foreach_view (view, i) {
+ redraw_view(view);
+ update_view_title(view);
+ }
break;
case REQ_SCREEN_UPDATE:
default:
/* An unknown key will show most commonly used commands. */
- report("%s", HELP);
+ report("Unknown key, press 'h' for help");
return TRUE;
}
line = view->line[view->offset + lineno];
type = get_line_type(line);
+ wmove(view->win, lineno, 0);
+
if (view->offset + lineno == view->lineno) {
if (type == LINE_COMMIT) {
string_copy(view->ref, line + 7);
}
type = LINE_CURSOR;
+ wchgat(view->win, -1, 0, type, NULL);
}
attr = get_line_attr(type);
wattrset(view->win, attr);
linelen = strlen(line);
- linelen = MIN(linelen, view->width);
- if (opt_line_number) {
- static char indent[] = " ";
- unsigned long real_lineno = view->offset + lineno + 1;
- int col = 0;
+ if (opt_line_number || opt_tab_size < TABSIZE) {
+ static char spaces[] = " ";
+ int col_offset = 0, col = 0;
- if (real_lineno == 1 || (real_lineno % opt_num_interval) == 0)
- mvwprintw(view->win, lineno, 0, "%.*d", view->digits, real_lineno);
+ if (opt_line_number) {
+ unsigned long real_lineno = view->offset + lineno + 1;
- else if (view->digits < sizeof(indent))
- mvwaddnstr(view->win, lineno, 0, indent, view->digits);
+ if (real_lineno == 1 ||
+ (real_lineno % opt_num_interval) == 0) {
+ wprintw(view->win, "%.*d", view->digits, real_lineno);
- waddstr(view->win, ": ");
+ } else {
+ waddnstr(view->win, spaces,
+ MIN(view->digits, STRING_SIZE(spaces)));
+ }
+ waddstr(view->win, ": ");
+ col_offset = view->digits + 2;
+ }
+
+ while (line && col_offset + col < view->width) {
+ int cols_max = view->width - col_offset - col;
+ char *text = line;
+ int cols;
- while (line) {
if (*line == '\t') {
- waddnstr(view->win, " ", 8 - (col % 8));
- col += 8 - (col % 8);
+ assert(sizeof(spaces) > TABSIZE);
line++;
+ text = spaces;
+ cols = opt_tab_size - (col % opt_tab_size);
} else {
- char *tab = strchr(line, '\t');
-
- if (tab)
- waddnstr(view->win, line, tab - line);
- else
- waddstr(view->win, line);
- col += tab - line;
- line = tab;
+ line = strchr(line, '\t');
+ cols = line ? line - text : strlen(text);
}
+
+ waddnstr(view->win, text, MIN(cols, cols_max));
+ col += cols;
}
- waddstr(view->win, line);
} else {
-#if 0
- /* NOTE: Code for only highlighting the text on the cursor line.
- * Kept since I've not yet decided whether to highlight the
- * entire line or not. --fonseca */
- /* No empty lines makes cursor drawing and clearing implicit. */
- if (!*line)
- line = " ", linelen = 1;
-#endif
- mvwaddnstr(view->win, lineno, 0, line, linelen);
- }
+ int col = 0, pos = 0;
- /* Paint the rest of the line if it's the cursor line. */
- if (type == LINE_CURSOR)
- wchgat(view->win, -1, 0, type, NULL);
+ for (; pos < linelen && col < view->width; pos++, col++)
+ if (line[pos] == '\t')
+ col += TABSIZE - (col % TABSIZE) - 1;
+
+ waddnstr(view->win, line, pos);
+ }
return TRUE;
}
static bool
pager_read(struct view *view, char *line)
{
- /* For some reason the piped man page has many empty lines
- * so skip successive emptys lines to work around it. */
+ /* Compress empty lines in the help view. */
if (view == VIEW(REQ_VIEW_HELP) &&
!*line &&
view->lines &&
char *line = view->line[view->lineno];
if (get_line_type(line) == LINE_COMMIT) {
- open_view(view, REQ_VIEW_DIFF, OPEN_DEFAULT);
+ if (view == VIEW(REQ_VIEW_LOG))
+ open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT | OPEN_BACKGROUNDED);
+ else
+ open_view(view, REQ_VIEW_DIFF, OPEN_DEFAULT);
}
return TRUE;
}
-
static struct view_ops pager_ops = {
+ "line",
pager_draw,
pager_read,
pager_enter,
};
+
+static struct ref **get_refs(char *id);
+
static bool
main_draw(struct view *view, unsigned int lineno)
{
char buf[DATE_COLS + 1];
struct commit *commit;
enum line_type type;
- int cols = 0;
+ int col = 0;
size_t timelen;
if (view->offset + lineno >= view->lines)
if (!*commit->author)
return FALSE;
+ wmove(view->win, lineno, col);
+
if (view->offset + lineno == view->lineno) {
string_copy(view->ref, commit->id);
string_copy(ref_commit, view->ref);
type = LINE_CURSOR;
+ wattrset(view->win, get_line_attr(type));
+ wchgat(view->win, -1, 0, type, NULL);
+
} else {
type = LINE_MAIN_COMMIT;
+ wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
}
- wmove(view->win, lineno, cols);
- wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
-
timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
waddnstr(view->win, buf, timelen);
waddstr(view->win, " ");
- cols += DATE_COLS;
- wmove(view->win, lineno, cols);
- wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
+ col += DATE_COLS;
+ wmove(view->win, lineno, col);
+ if (type != LINE_CURSOR)
+ wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
if (strlen(commit->author) > 19) {
waddnstr(view->win, commit->author, 18);
- wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
+ if (type != LINE_CURSOR)
+ wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
waddch(view->win, '~');
} else {
waddstr(view->win, commit->author);
}
- cols += 20;
- wattrset(view->win, A_NORMAL);
- mvwaddch(view->win, lineno, cols, ACS_LTEE);
- wattrset(view->win, get_line_attr(type));
- mvwaddstr(view->win, lineno, cols + 2, commit->title);
- wattrset(view->win, A_NORMAL);
+ col += 20;
+ if (type != LINE_CURSOR)
+ wattrset(view->win, A_NORMAL);
+
+ mvwaddch(view->win, lineno, col, ACS_LTEE);
+ wmove(view->win, lineno, col + 2);
+ col += 2;
+
+ if (commit->refs) {
+ size_t i = 0;
+
+ do {
+ if (type == LINE_CURSOR)
+ ;
+ else if (commit->refs[i]->tag)
+ wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
+ else
+ wattrset(view->win, get_line_attr(LINE_MAIN_REF));
+ waddstr(view->win, "[");
+ waddstr(view->win, commit->refs[i]->name);
+ waddstr(view->win, "]");
+ if (type != LINE_CURSOR)
+ wattrset(view->win, A_NORMAL);
+ waddstr(view->win, " ");
+ col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
+ } while (commit->refs[i++]->next);
+ }
+
+ if (type != LINE_CURSOR)
+ wattrset(view->win, get_line_attr(type));
+
+ {
+ int titlelen = strlen(commit->title);
+
+ if (col + titlelen > view->width)
+ titlelen = view->width - col;
+
+ waddnstr(view->win, commit->title, titlelen);
+ }
return TRUE;
}
view->line[view->lines++] = commit;
string_copy(commit->id, line);
+ commit->refs = get_refs(commit->id);
break;
case LINE_AUTHOR:
/* Require titles to start with a non-space character at the
* offset used by git log. */
+ /* FIXME: More gracefull handling of titles; append "..." to
+ * shortened titles, etc. */
if (strncmp(line, " ", 4) ||
- isspace(line[5]))
+ isspace(line[4]))
break;
string_copy(commit->title, line + 4);
}
static struct view_ops main_ops = {
+ "commit",
main_draw,
main_read,
main_enter,
};
+
+/**
+ * KEYS
+ * ----
+ * Below the default key bindings are shown.
+ **/
+
+struct keymap {
+ int alias;
+ int request;
+};
+
+static struct keymap keymap[] = {
+ /**
+ * View switching
+ * ~~~~~~~~~~~~~~
+ * m::
+ * Switch to main view.
+ * d::
+ * Switch to diff view.
+ * l::
+ * Switch to log view.
+ * p::
+ * Switch to pager view.
+ * h::
+ * Show man page.
+ * Return::
+ * If on a commit line show the commit diff. Additionally, if in
+ * main or log view this will split the view. To open the commit
+ * diff in full size view either use 'd' or press Return twice.
+ * Tab::
+ * Switch to next view.
+ **/
+ { 'm', REQ_VIEW_MAIN },
+ { 'd', REQ_VIEW_DIFF },
+ { 'l', REQ_VIEW_LOG },
+ { 'p', REQ_VIEW_PAGER },
+ { 'h', REQ_VIEW_HELP },
+
+ { KEY_TAB, REQ_VIEW_NEXT },
+ { KEY_RETURN, REQ_ENTER },
+
+ /**
+ * Cursor navigation
+ * ~~~~~~~~~~~~~~~~~
+ * Up::
+ * Move cursor one line up.
+ * Down::
+ * Move cursor one line down.
+ * k::
+ * Move cursor one line up and enter. When used in the main view
+ * this will always show the diff of the current commit in the
+ * split diff view.
+ * j::
+ * Move cursor one line down and enter.
+ * PgUp::
+ * Move cursor one page up.
+ * PgDown::
+ * Move cursor one page down.
+ * Home::
+ * Jump to first line.
+ * End::
+ * Jump to last line.
+ **/
+ { KEY_UP, REQ_MOVE_UP },
+ { KEY_DOWN, REQ_MOVE_DOWN },
+ { 'k', REQ_MOVE_UP_ENTER },
+ { 'j', REQ_MOVE_DOWN_ENTER },
+ { KEY_HOME, REQ_MOVE_FIRST_LINE },
+ { KEY_END, REQ_MOVE_LAST_LINE },
+ { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
+ { KEY_PPAGE, REQ_MOVE_PAGE_UP },
+
+ /**
+ * Scrolling
+ * ~~~~~~~~~
+ * Insert::
+ * Scroll view one line up.
+ * Delete::
+ * Scroll view one line down.
+ * w::
+ * Scroll view one page up.
+ * s::
+ * Scroll view one page down.
+ **/
+ { KEY_IC, REQ_SCROLL_LINE_UP },
+ { KEY_DC, REQ_SCROLL_LINE_DOWN },
+ { 'w', REQ_SCROLL_PAGE_UP },
+ { 's', REQ_SCROLL_PAGE_DOWN },
+
+ /**
+ * Misc
+ * ~~~~
+ * q::
+ * Quit
+ * r::
+ * Redraw screen.
+ * z::
+ * Stop all background loading. This can be useful if you use
+ * tig(1) in a repository with a long history without limiting
+ * the revision log.
+ * v::
+ * Show version.
+ * n::
+ * Toggle line numbers on/off.
+ * ':'::
+ * Open prompt. This allows you to specify what git command
+ * to run. Example:
+ *
+ * :log -p
+ **/
+ { 'q', REQ_QUIT },
+ { 'z', REQ_STOP_LOADING },
+ { 'v', REQ_SHOW_VERSION },
+ { 'r', REQ_SCREEN_REDRAW },
+ { 'n', REQ_TOGGLE_LINE_NUMBERS },
+ { ':', REQ_PROMPT },
+
+ /* wgetch() with nodelay() enabled returns ERR when there's no input. */
+ { ERR, REQ_SCREEN_UPDATE },
+
+ /* Use the ncurses SIGWINCH handler. */
+ { KEY_RESIZE, REQ_SCREEN_RESIZE },
+};
+
+static enum request
+get_request(int key)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(keymap); i++)
+ if (keymap[i].alias == key)
+ return keymap[i].request;
+
+ return (enum request) key;
+}
+
+
/*
* Status management
*/
static void
report(const char *msg, ...)
{
- va_list args;
+ static bool empty = TRUE;
+ struct view *view = display[current_view];
- va_start(args, msg);
+ if (!empty || *msg) {
+ va_list args;
- /* Update the title window first, so the cursor ends up in the status
- * window. */
- update_view_title(display[current_view]);
+ va_start(args, msg);
- werase(status_win);
- wmove(status_win, 0, 0);
- vwprintw(status_win, msg, args);
- wrefresh(status_win);
+ werase(status_win);
+ wmove(status_win, 0, 0);
+ if (*msg) {
+ vwprintw(status_win, msg, args);
+ empty = FALSE;
+ } else {
+ empty = TRUE;
+ }
+ wrefresh(status_win);
- va_end(args);
+ va_end(args);
+ }
+
+ update_view_title(view);
+
+ /* Move the cursor to the right-most column of the cursor line.
+ *
+ * XXX: This could turn out to be a bit expensive, but it ensures that
+ * the cursor does not jump around. */
+ if (view->lines) {
+ wmove(view->win, view->lineno - view->offset, view->width - 1);
+ wrefresh(view->win);
+ }
}
/* Controls when nodelay should be in effect when polling user input. */
static void
-set_nonblocking_input(int loading)
+set_nonblocking_input(bool loading)
{
- /* The number of loading views. */
- static unsigned int nloading;
-
- if (loading == TRUE) {
- if (nloading++ == 0)
- nodelay(status_win, TRUE);
- return;
- }
+ static unsigned int loading_views;
- if (nloading-- == 1)
- nodelay(status_win, FALSE);
+ if ((loading == FALSE && loading_views-- == 1) ||
+ (loading == TRUE && loading_views++ == 0))
+ nodelay(status_win, loading);
}
static void
wbkgdset(status_win, get_line_attr(LINE_STATUS));
}
+
+/*
+ * Repository references
+ */
+
+static struct ref *refs;
+static size_t refs_size;
+
+static struct ref **
+get_refs(char *id)
+{
+ struct ref **id_refs = NULL;
+ size_t id_refs_size = 0;
+ size_t i;
+
+ for (i = 0; i < refs_size; i++) {
+ struct ref **tmp;
+
+ if (strcmp(id, refs[i].id))
+ continue;
+
+ tmp = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
+ if (!tmp) {
+ if (id_refs)
+ free(id_refs);
+ return NULL;
+ }
+
+ id_refs = tmp;
+ if (id_refs_size > 0)
+ id_refs[id_refs_size - 1]->next = 1;
+ id_refs[id_refs_size] = &refs[i];
+
+ /* XXX: The properties of the commit chains ensures that we can
+ * safely modify the shared ref. The repo references will
+ * always be similar for the same id. */
+ id_refs[id_refs_size]->next = 0;
+ id_refs_size++;
+ }
+
+ return id_refs;
+}
+
+static int
+load_refs(void)
+{
+ char *cmd_env = getenv("TIG_LS_REMOTE");
+ char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
+ FILE *pipe = popen(cmd, "r");
+ char buffer[BUFSIZ];
+ char *line;
+
+ if (!pipe)
+ return ERR;
+
+ while ((line = fgets(buffer, sizeof(buffer), pipe))) {
+ char *name = strchr(line, '\t');
+ struct ref *ref;
+ int namelen;
+ bool tag = FALSE;
+ bool tag_commit = FALSE;
+
+ if (!name)
+ continue;
+
+ *name++ = 0;
+ namelen = strlen(name) - 1;
+
+ /* Commits referenced by tags has "^{}" appended. */
+ if (name[namelen - 1] == '}') {
+ while (namelen > 0 && name[namelen] != '^')
+ namelen--;
+ if (namelen > 0)
+ tag_commit = TRUE;
+ }
+ name[namelen] = 0;
+
+ if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
+ if (!tag_commit)
+ continue;
+ name += STRING_SIZE("refs/tags/");
+ tag = TRUE;
+
+ } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
+ name += STRING_SIZE("refs/heads/");
+
+ } else if (!strcmp(name, "HEAD")) {
+ continue;
+ }
+
+ refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
+ if (!refs)
+ return ERR;
+
+ ref = &refs[refs_size++];
+ ref->tag = tag;
+ ref->name = strdup(name);
+ if (!ref->name)
+ return ERR;
+
+ string_copy(ref->id, line);
+ }
+
+ if (ferror(pipe))
+ return ERR;
+
+ pclose(pipe);
+
+ if (refs_size == 0)
+ die("Not a git repository");
+
+ return OK;
+}
+
/*
* Main
*/
int
main(int argc, char *argv[])
{
+ struct view *view;
enum request request;
+ size_t i;
signal(SIGINT, quit);
if (!parse_options(argc, argv))
return 0;
+ if (load_refs() == ERR)
+ die("Failed to load refs.");
+
+ for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
+ view->cmd_env = getenv(view->cmd_env);
+
request = opt_request;
init_display();
while (view_driver(display[current_view], request)) {
- struct view *view;
int key;
int i;
key = wgetch(status_win);
request = get_request(key);
- if (request == REQ_PROMPT) {
+ /* Some low-level request handling. This keeps access to
+ * status_win restricted. */
+ switch (request) {
+ case REQ_PROMPT:
report(":");
/* Temporarily switch to line-oriented and echoed
* input. */
noecho();
cbreak();
+ break;
+
+ case REQ_SCREEN_RESIZE:
+ {
+ int height, width;
+
+ getmaxyx(stdscr, height, width);
+
+ /* Resize the status view and let the view driver take
+ * care of resizing the displayed views. */
+ wresize(status_win, 1, width);
+ mvwin(status_win, height - 1, 0);
+ wrefresh(status_win);
+ break;
+ }
+ default:
+ break;
}
}
}
/**
+ * [[refspec]]
+ * Revision specification
+ * ----------------------
+ * This section describes various ways to specify what revisions to display
+ * or otherwise limit the view to. tig(1) does not itself parse the described
+ * revision options so refer to the relevant git man pages for futher
+ * information. Relevant man pages besides git-log(1) are git-diff(1) and
+ * git-rev-list(1).
+ *
+ * You can tune the interaction with git by making use of the options
+ * explained in this section. For example, by configuring the environment
+ * variables described in the <<view-commands, "View commands">> section.
+ *
+ * Limit by path name
+ * ~~~~~~~~~~~~~~~~~~
+ * If you are interested only in those revisions that made changes to a
+ * specific file (or even several files) list the files like this:
+ *
+ * $ tig log Makefile
+ *
+ * To avoid ambiguity with repository references such as tag name, be sure
+ * to separate file names from other git options using "\--". So if you
+ * have a file named 'master' it will clash with the reference named
+ * 'master', and thus you will have to use:
+ *
+ * $ tig log -- master
+ *
+ * NOTE: For the main view, avoiding ambiguity will in some cases require
+ * you to specify two "\--" options. The first will make tig(1) stop
+ * option processing and the latter will be passed to git log.
+ *
+ * Limit by date or number
+ * ~~~~~~~~~~~~~~~~~~~~~~~
+ * To speed up interaction with git, you can limit the amount of commits
+ * to show both for the log and main view. Either limit by date using
+ * e.g. `--since=1.month` or limit by the number of commits using `-n400`.
+ *
+ * If you are only interested in changed that happened between two dates
+ * you can use:
+ *
+ * $ tig -- --after=May.5th --before=2006-05-16.15:44
+ *
+ * NOTE: The dot (".") is used as a separator instead of a space to avoid
+ * having to quote the option value. If you prefer use `--after="May 5th"`
+ * instead of `--after="May 5th"`.
+ *
+ * Limiting by commit ranges
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~
+ * Alternatively, commits can be limited to a specific range, such as
+ * "all commits between 'tag-1.0' and 'tag-2.0'". For example:
+ *
+ * $ tig log tag-1.0..tag-2.0
+ *
+ * This way of commit limiting makes it trivial to only browse the commits
+ * which haven't been pushed to a remote branch. Assuming 'origin' is your
+ * upstream remote branch, using:
+ *
+ * $ tig log origin..HEAD
+ *
+ * will list what will be pushed to the remote branch. Optionally, the ending
+ * 'HEAD' can be left out since it is implied.
+ *
+ * Limiting by reachability
+ * ~~~~~~~~~~~~~~~~~~~~~~~~
+ * Git interprets the range specifier "tag-1.0..tag-2.0" as
+ * "all commits reachable from 'tag-2.0' but not from 'tag-1.0'".
+ * Where reachability refers to what commits are ancestors (or part of the
+ * history) of the branch or tagged revision in question.
+ *
+ * If you prefer to specify which commit to preview in this way use the
+ * following:
+ *
+ * $ tig log tag-2.0 ^tag-1.0
+ *
+ * You can think of '^' as a negation operator. Using this alternate syntax,
+ * it is possible to further prune commits by specifying multiple branch
+ * cut offs.
+ *
+ * Combining revisions specification
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * Revisions options can to some degree be combined, which makes it possible
+ * to say "show at most 20 commits from within the last month that changed
+ * files under the Documentation/ directory."
+ *
+ * $ tig -- --since=1.month -n20 -- Documentation/
+ *
+ * Examining all repository references
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * In some cases, it can be useful to query changes across all references
+ * in a repository. An example is to ask "did any line of development in
+ * this repository change a particular file within the last week". This
+ * can be accomplished using:
+ *
+ * $ tig -- --all --since=1.week -- Makefile
+ *
+ * BUGS
+ * ----
+ * Known bugs and problems:
+ *
+ * - If the screen width is very small the main view can draw
+ * outside the current view causing bad wrapping. Same goes
+ * for title and status windows.
+ *
* TODO
* ----
* Features that should be explored.
*
- * - Terminal resizing support. I am yet to figure out whether catching
- * SIGWINCH is preferred over using ncurses' built-in support for resizing.
+ * - Searching.
*
* - Locale support.
*
~mdw / tig / blobdiff