* tig [options] [--] [git log options]
* tig [options] log [git log options]
* tig [options] diff [git diff options]
- * tig [options] < [git log or git diff output]
+ * tig [options] show [git show options]
+ * tig [options] < [git command output]
*
* DESCRIPTION
* -----------
* Browse changes in a git repository.
**/
-#ifndef DEBUG
-#define NDEBUG
-#endif
-
#ifndef VERSION
#define VERSION "tig-0.1"
#endif
+#ifndef DEBUG
+#define NDEBUG
+#endif
+
#include <assert.h>
#include <errno.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <unistd.h>
#include <time.h>
#include <curses.h>
#define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
-/* Some ascii-shorthands that fit into the ncurses namespace. */
+/* Some ascii-shorthands fitted into the ncurses namespace. */
#define KEY_TAB '\t'
#define KEY_RETURN '\r'
#define KEY_ESC 27
REQ_VIEW_DIFF,
REQ_VIEW_LOG,
REQ_VIEW_HELP,
+ REQ_VIEW_PAGER,
REQ_ENTER,
REQ_QUIT,
static int opt_num_interval = NUMBER_INTERVAL;
static enum request opt_request = REQ_VIEW_MAIN;
static char opt_cmd[SIZEOF_CMD] = "";
-
-char ref_head[SIZEOF_REF] = "HEAD";
-char ref_commit[SIZEOF_REF] = "HEAD";
+static FILE *opt_pipe = NULL;
/* Returns the index of log or diff command or -1 to exit. */
-static int
+static bool
parse_options(int argc, char *argv[])
{
int i;
char *opt = argv[i];
/**
- * log [options]::
- * git log options.
- *
- * diff [options]::
- * git diff options.
- **/
- if (!strcmp(opt, "log") ||
- !strcmp(opt, "diff")) {
- opt_request = opt[0] == 'l'
- ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
- return i;
- }
-
- /**
* -l::
* Start up in log view.
**/
* Optionally, with interval different than each line.
**/
if (!strncmp(opt, "-n", 2) ||
- !strncmp(opt, "--line-number", 13)) {
+ !strncmp(opt, "--line-number", 13)) {
char *num = opt;
if (opt[1] == 'n') {
* Show version and exit.
**/
if (!strcmp(opt, "-v") ||
- !strcmp(opt, "--version")) {
+ !strcmp(opt, "--version")) {
printf("tig version %s\n", VERSION);
- return -1;
+ return FALSE;
}
/**
* \--::
- * End of tig options. Useful when specifying commands
+ * End of tig(1) options. Useful when specifying commands
* for the main view. Example:
*
- * $ tig -- --pretty=raw tag-1.0..HEAD
+ * $ tig -- --since=1.month
**/
- if (!strcmp(opt, "--"))
- return i + 1;
+ if (!strcmp(opt, "--")) {
+ i++;
+ break;
+ }
- /* Make stuff like:
- *
+ /**
+ * log [options]::
+ * Open log view using the given git log options.
+ *
+ * diff [options]::
+ * Open diff view using the given git diff options.
+ *
+ * show [options]::
+ * Open diff view using the given git show options.
+ **/
+ if (!strcmp(opt, "log") ||
+ !strcmp(opt, "diff") ||
+ !strcmp(opt, "show")) {
+ opt_request = opt[0] == 'l'
+ ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
+ break;
+ }
+
+ /* Make stuff like:
+ *
* $ tig tag-1.0..HEAD
*
- * work.
- */
+ * work. */
if (opt[0] && opt[0] != '-')
- return i;
+ break;
die("unknown command '%s'", opt);
}
- return i;
+ if (!isatty(STDIN_FILENO)) {
+ /**
+ * Pager mode
+ * ~~~~~~~~~~
+ * If stdin is a pipe, any log or diff options will be ignored and the
+ * pager view will be opened loading data from stdin. The pager mode
+ * can be used for colorizing output from various git commands.
+ *
+ * Example on how to colorize the output of git-show(1):
+ *
+ * $ git show | tig
+ **/
+ opt_request = REQ_VIEW_PAGER;
+ opt_pipe = stdin;
+
+ } else if (i < argc) {
+ size_t buf_size;
+
+ /**
+ * 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.
+ *
+ * NOTE: It is possible to specify options even for the main
+ * view. If doing this you should not touch the --pretty
+ * option.
+ *
+ * Example on how to open the log view and show both author and
+ * committer information:
+ *
+ * $ tig log --pretty=fuller
+ **/
+
+ if (opt_request == REQ_VIEW_MAIN)
+ /* XXX: This is vulnerable to the user overriding
+ * options required for the main view parser. */
+ string_copy(opt_cmd, "git log --stat --pretty=raw");
+ else
+ string_copy(opt_cmd, "git");
+ buf_size = strlen(opt_cmd);
+
+ while (buf_size < sizeof(opt_cmd) && i < argc) {
+ opt_cmd[buf_size++] = ' ';
+ buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
+ }
+
+ if (buf_size >= sizeof(opt_cmd))
+ die("command too long");
+
+ opt_cmd[buf_size] = 0;
+
+ }
+
+ return TRUE;
}
* Switch to log view.
* m::
* Switch to main view.
+ * p::
+ * Switch to pager view.
* h::
* Show man page.
* Return::
{ '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 },
* n::
* Toggle line numbers on/off.
* ':'::
- * Open prompt.
+ * Open prompt. This allows you to specify what git command to run.
+ * Example:
+ *
+ * :log -p
+ *
**/
{ KEY_ESC, REQ_QUIT },
{ 'q', REQ_QUIT },
* --------- --------------- ---------- ---------- ---------- */ \
/* Diff markup */ \
LINE(DIFF, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
-LINE(INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
+LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
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_SIM, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
LINE(DIFF_DISSIM, "dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
/* Pretty print commit header */ \
-LINE(AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
-LINE(MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
-LINE(DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
+LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
+LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
+LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
+LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
+LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
+LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
/* Raw commit header */ \
LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
-LINE(AUTHOR_IDENT, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
+LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
/* Misc */ \
LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
struct view {
const char *name; /* View name */
- const char *defcmd; /* Default command line */
+ const char *cmdfmt; /* Default command line format */
char *id; /* Points to either of ref_{head,commit} */
size_t objsize; /* Size of objects in the line index */
struct view_ops {
+ /* Draw one line; @lineno must be < view->height. */
bool (*draw)(struct view *view, unsigned int lineno);
+ /* Read one line; updates view->line. */
bool (*read)(struct view *view, char *line);
+ /* Depending on view, change display based on current line. */
bool (*enter)(struct view *view);
} *ops;
char cmd[SIZEOF_CMD]; /* Command buffer */
- char ref[SIZEOF_REF]; /* Hovered Commit reference */
- /* The view reference that describes the content of this view. */
- char vref[SIZEOF_REF];
+ char ref[SIZEOF_REF]; /* Hovered commit reference */
+ char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
- WINDOW *win;
- WINDOW *title;
- int height, width;
+ int height, width; /* The width and height of the main window */
+ WINDOW *win; /* The main window */
+ WINDOW *title; /* The title window living below the main window */
/* Navigation */
unsigned long offset; /* Offset of the window top */
/* Buffering */
unsigned long lines; /* Total number of lines */
- void **line; /* Line index */
+ void **line; /* Line index; each line contains user data */
+ unsigned int digits; /* Number of digits in the lines member. */
/* Loading */
FILE *pipe;
static struct view_ops main_ops;
#define DIFF_CMD \
- "git log --stat -n1 %s ; echo; " \
- "git diff --find-copies-harder -B -C %s^ %s"
+ "git show --patch-with-stat --find-copies-harder -B -C %s"
#define LOG_CMD \
"git log --cc --stat -n100 %s"
#define HELP_CMD \
"man tig 2> /dev/null"
+char ref_head[SIZEOF_REF] = "HEAD";
+char ref_commit[SIZEOF_REF] = "HEAD";
+
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 },
+ { "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 },
};
#define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
wmove(view->title, 0, 0);
/* [main] ref: 334b506... - commit 6 of 4383 (0%) */
- wprintw(view->title, "[%s] ref: %s", view->name, view->ref);
+
+ if (*view->ref)
+ wprintw(view->title, "[%s] ref: %s", view->name, view->ref);
+ else
+ wprintw(view->title, "[%s]", view->name);
+
if (view->lines) {
char *type = view == VIEW(REQ_VIEW_MAIN) ? "commit" : "line";
report("Already on first line");
return;
- } else if (steps >= 0 && view->lineno + 1 == view->lines) {
+ } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
report("Already on last line");
return;
}
if (opt_cmd[0]) {
string_copy(view->cmd, opt_cmd);
opt_cmd[0] = 0;
+ /* When running random commands, the view ref could have become
+ * invalid so clear it. */
+ view->ref[0] = 0;
} else {
- if (snprintf(view->cmd, sizeof(view->cmd), view->defcmd,
+ if (snprintf(view->cmd, sizeof(view->cmd), view->cmdfmt,
id, id, id) >= sizeof(view->cmd))
return FALSE;
}
- view->pipe = popen(view->cmd, "r");
+ /* Special case for the pager view. */
+ if (opt_pipe) {
+ view->pipe = opt_pipe;
+ opt_pipe = NULL;
+ } else {
+ view->pipe = popen(view->cmd, "r");
+ }
+
if (!view->pipe)
return FALSE;
view->offset = 0;
view->lines = 0;
view->lineno = 0;
+ string_copy(view->vid, id);
if (view->line) {
int i;
/* The number of lines to read. If too low it will cause too much
* redrawing (and possible flickering), if too high responsiveness
* will suffer. */
- int lines = view->height;
+ unsigned long lines = view->height;
int redraw_from = -1;
if (!view->pipe)
break;
}
+ {
+ int digits;
+
+ lines = view->lines;
+ for (digits = 0; lines; digits++)
+ lines /= 10;
+
+ /* Keep the displayed view in sync with line number scaling. */
+ if (digits != view->digits) {
+ view->digits = digits;
+ redraw_from = 0;
+ }
+ }
+
/* CPU hogilicious! */
update_view_title(view);
return FALSE;
}
+enum open_flags {
+ OPEN_DEFAULT = 0, /* Use default view switching. */
+ OPEN_SPLIT = 1, /* Split current view. */
+ OPEN_BACKGROUNDED = 2, /* Backgrounded. */
+ OPEN_RELOAD = 4, /* Reload view even if it is the current. */
+};
+
static void
-switch_view(struct view *prev, enum request request,
- bool backgrounded, bool split)
+open_view(struct view *prev, enum request request, enum open_flags flags)
{
+ bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
+ bool split = !!(flags & OPEN_SPLIT);
+ bool reload = !!(flags & OPEN_RELOAD);
struct view *view = VIEW(request);
struct view *displayed;
int nviews;
foreach_view (displayed, nviews) {
if (prev != view &&
view == displayed &&
- !strcmp(view->id, prev->id)) {
+ !strcmp(view->vid, prev->vid)) {
current_view = nviews;
/* Blur out the title of the previous view. */
update_view_title(prev);
}
}
- if (view == prev && nviews == 1) {
+ if (view == prev && nviews == 1 && !reload) {
report("Already in %s view", view->name);
return;
}
- if (strcmp(view->vref, view->id) &&
+ if ((reload || strcmp(view->vid, view->id)) &&
!begin_update(view)) {
report("Failed to load %s view", view->name);
return;
case REQ_VIEW_DIFF:
case REQ_VIEW_LOG:
case REQ_VIEW_HELP:
- switch_view(view, request, FALSE, FALSE);
+ case REQ_VIEW_PAGER:
+ open_view(view, request, OPEN_DEFAULT);
break;
case REQ_ENTER:
+ if (!view->lines) {
+ report("Nothing to enter");
+ break;
+ }
return view->ops->enter(view);
case REQ_VIEW_NEXT:
break;
case REQ_PROMPT:
- switch_view(view, opt_request, FALSE, FALSE);
+ /* Always reload^Wrerun commands from the prompt. */
+ open_view(view, opt_request, OPEN_RELOAD);
break;
case REQ_STOP_LOADING:
linelen = MIN(linelen, view->width);
if (opt_line_number) {
- unsigned int real_lineno = view->offset + lineno + 1;
+ static char indent[] = " ";
+ unsigned long real_lineno = view->offset + lineno + 1;
int col = 0;
if (real_lineno == 1 || (real_lineno % opt_num_interval) == 0)
- mvwprintw(view->win, lineno, 0, "%4d: ", real_lineno);
- else
- mvwaddstr(view->win, lineno, 0, " : ");
+ mvwprintw(view->win, lineno, 0, "%.*d", view->digits, real_lineno);
+
+ else if (view->digits < sizeof(indent))
+ mvwaddnstr(view->win, lineno, 0, indent, view->digits);
+
+ waddstr(view->win, ": ");
while (line) {
if (*line == '\t') {
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. */
+ if (view == VIEW(REQ_VIEW_HELP) &&
+ !*line &&
+ view->lines &&
+ !*((char *) view->line[view->lines - 1]))
+ return TRUE;
+
view->line[view->lines] = strdup(line);
if (!view->line[view->lines])
return FALSE;
char *line = view->line[view->lineno];
if (get_line_type(line) == LINE_COMMIT) {
- switch_view(view, REQ_VIEW_DIFF, FALSE, FALSE);
+ open_view(view, REQ_VIEW_DIFF, OPEN_DEFAULT);
}
return TRUE;
if (view->offset + lineno == view->lineno) {
string_copy(view->ref, commit->id);
+ string_copy(ref_commit, view->ref);
type = LINE_CURSOR;
} else {
type = LINE_MAIN_COMMIT;
string_copy(commit->id, line);
break;
- case LINE_AUTHOR_IDENT:
+ case LINE_AUTHOR:
{
char *ident = line + STRING_SIZE("author ");
char *end = strchr(ident, '<');
static bool
main_enter(struct view *view)
{
- switch_view(view, REQ_VIEW_DIFF, TRUE, TRUE);
+ open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT | OPEN_BACKGROUNDED);
return TRUE;
}
* Status management
*/
+/* Whether or not the curses interface has been initialized. */
+bool cursed = FALSE;
+
/* The status window is used for polling keystrokes. */
static WINDOW *status_win;
{
int x, y;
- initscr(); /* Initialize the curses library */
+ /* Initialize the curses library */
+ if (isatty(STDIN_FILENO)) {
+ cursed = !!initscr();
+ } else {
+ /* Leave stdin and stdout alone when acting as a pager. */
+ FILE *io = fopen("/dev/tty", "r+");
+
+ cursed = !!newterm(NULL, io, io);
+ }
+
+ if (!cursed)
+ die("Failed to initialize curses");
+
nonl(); /* Tell curses not to do NL->CR/NL on output */
cbreak(); /* Take input chars one at a time, no wait for \n */
noecho(); /* Don't echo input */
static void
quit(int sig)
{
- if (status_win)
- delwin(status_win);
- endwin();
-
- /* FIXME: Shutdown gracefully. */
-
+ /* XXX: Restore tty modes and let the OS cleanup the rest! */
+ if (cursed)
+ endwin();
exit(0);
}
main(int argc, char *argv[])
{
enum request request;
- int git_arg;
signal(SIGINT, quit);
- git_arg = parse_options(argc, argv);
- if (git_arg < 0)
+ if (!parse_options(argc, argv))
return 0;
- if (git_arg < argc) {
- size_t buf_size;
-
- /* XXX: This is vulnerable to the user overriding options
- * required for the main view parser. */
- if (opt_request == REQ_VIEW_MAIN)
- string_copy(opt_cmd, "git log --stat --pretty=raw");
- else
- string_copy(opt_cmd, "git");
- buf_size = strlen(opt_cmd);
-
- while (buf_size < sizeof(opt_cmd) && git_arg < argc) {
- opt_cmd[buf_size++] = ' ';
- buf_size = sq_quote(opt_cmd, buf_size, argv[git_arg++]);
- }
-
- if (buf_size >= sizeof(opt_cmd))
- die("command too long");
-
- opt_cmd[buf_size] = 0;
- }
-
request = opt_request;
init_display();
request = get_request(key);
if (request == REQ_PROMPT) {
+ report(":");
+ /* Temporarily switch to line-oriented and echoed
+ * input. */
nocbreak();
echo();
- report(":");
- if (wgetnstr(status_win, opt_cmd, sizeof(opt_cmd)) == OK)
- die("%s", opt_cmd);
- cbreak(); /* Take input chars one at a time, no wait for \n */
- noecho(); /* Don't echo input */
+
+ if (wgetnstr(status_win, opt_cmd + 4, sizeof(opt_cmd) - 4) == OK) {
+ memcpy(opt_cmd, "git ", 4);
+ opt_request = REQ_VIEW_PAGER;
+ } else {
+ request = ERR;
+ }
+
+ noecho();
+ cbreak();
}
}
* ----
* Features that should be explored.
*
- * - Dynamic scaling of line number indentation.
- *
- * - Internal command line (exmode-inspired) which allows to specify what git
- * log or git diff command to run. Example:
- *
- * :log -p
- *
* - Terminal resizing support. I am yet to figure out whether catching
* SIGWINCH is preferred over using ncurses' built-in support for resizing.
*
~mdw / tig / blobdiff