/* Copyright (c) 2006 Jonas Fonseca <fonseca@xxxxxxx>
* See license info at the bottom. */
/**
* TIG(1)
* ======
*
* NAME
* ----
* tig - text-mode interface for git
*
* SYNOPSIS
* --------
* [verse]
* tig [options]
* tig [options] [--] [git log options]
* tig [options] log [git log options]
* tig [options] diff [git diff options]
* tig [options] show [git show options]
* tig [options] < [git command output]
*
* DESCRIPTION
* -----------
* 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-0.3"
#endif
#ifndef DEBUG
#define NDEBUG
#endif
#include <assert.h>
#include <errno.h>
#include <ctype.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include <curses.h>
static void die(const char *err, ...);
static void report(const char *msg, ...);
static void set_nonblocking_input(bool loading);
#define ABS(x) ((x) >= 0 ? (x) : -(x))
#define MIN(x, y) ((x) < (y) ? (x) : (y))
#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
#define STRING_SIZE(x) (sizeof(x) - 1)
#define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
#define SIZEOF_CMD 1024 /* Size of command buffer. */
/* 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_TAB '\t'
#define KEY_RETURN '\r'
#define KEY_ESC 27
/* User action requests. */
enum request {
/* Offset all requests to avoid conflicts with ncurses getch values. */
REQ_OFFSET = KEY_MAX + 1,
/* XXX: Keep the view request first and in sync with views[]. */
REQ_VIEW_MAIN,
REQ_VIEW_DIFF,
REQ_VIEW_LOG,
REQ_VIEW_HELP,
REQ_VIEW_PAGER,
REQ_ENTER,
REQ_QUIT,
REQ_PROMPT,
REQ_SCREEN_REDRAW,
REQ_SCREEN_RESIZE,
REQ_SCREEN_UPDATE,
REQ_SHOW_VERSION,
REQ_STOP_LOADING,
REQ_TOGGLE_LINE_NUMBERS,
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_MOVE_LAST_LINE,
REQ_SCROLL_LINE_UP,
REQ_SCROLL_LINE_DOWN,
REQ_SCROLL_PAGE_UP,
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
*/
static inline void
string_ncopy(char *dst, char *src, int dstlen)
{
strncpy(dst, src, dstlen - 1);
dst[dstlen - 1] = 0;
}
/* Shorthand for safely copying into a fixed buffer. */
#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
* quoting routines found in the quote.c file.
*
* Help to copy the thing properly quoted for the shell safety. any single
* quote is replaced with '\'', any exclamation point is replaced with '\!',
* and the whole thing is enclosed in a
*
* E.g.
* original sq_quote result
* name ==> name ==> 'name'
* a b ==> a b ==> 'a b'
* a'b ==> a'\''b ==> 'a'\''b'
* a!b ==> a'\!'b ==> 'a'\!'b'
*/
static size_t
sq_quote(char buf[SIZEOF_CMD], size_t bufsize, const char *src)
{
char c;
#define BUFPUT(x) ( (bufsize < SIZEOF_CMD) && (buf[bufsize++] = (x)) )
BUFPUT('\'');
while ((c = *src++)) {
if (c == '\'' || c == '!') {
BUFPUT('\'');
BUFPUT('\\');
BUFPUT(c);
BUFPUT('\'');
} else {
BUFPUT(c);
}
}
BUFPUT('\'');
return bufsize;
}
/**
* OPTIONS
* -------
**/
/* 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;
/* Returns the index of log or diff command or -1 to exit. */
static bool
parse_options(int argc, char *argv[])
{
int i;
for (i = 1; i < argc; i++) {
char *opt = argv[i];
/**
* -l::
* Start up in log view using the internal log command.
**/
if (!strcmp(opt, "-l")) {
opt_request = REQ_VIEW_LOG;
continue;
}
/**
* -d::
* Start up in diff view using the internal diff command.
**/
if (!strcmp(opt, "-d")) {
opt_request = REQ_VIEW_DIFF;
continue;
}
/**
* -n[INTERVAL], --line-number[=INTERVAL]::
* Prefix line numbers in log and diff view.
* Optionally, with interval different than each line.
**/
if (!strncmp(opt, "-n", 2) ||
!strncmp(opt, "--line-number", 13)) {
char *num = opt;
if (opt[1] == 'n') {
num = opt + 2;
} else if (opt[STRING_SIZE("--line-number")] == '=') {
num = opt + STRING_SIZE("--line-number=");
}
if (isdigit(*num))
opt_num_interval = atoi(num);
opt_line_number = TRUE;
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.
**/
if (!strcmp(opt, "-v") ||
!strcmp(opt, "--version")) {
printf("tig version %s\n", VERSION);
return FALSE;
}
/**
* \--::
* End of tig(1) options. Useful when specifying command
* options for the main view. Example:
*
* $ tig -- --since=1.month
**/
if (!strcmp(opt, "--")) {
i++;
break;
}
/**
* log [git log options]::
* Open log view using the given git log options.
*
* diff [git diff options]::
* Open diff view using the given git diff options.
*
* show [git 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;
}
/**
* [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
**/
if (opt[0] && opt[0] != '-')
break;
die("unknown command '%s'", opt);
}
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 they are passed to the shell.
*
* 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)
/* 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;
}
/*
* Line-oriented content detection.
*/
#define LINE_INFO \
/* Line type String to match Foreground Background Attributes
* --------- --------------- ---------- ---------- ---------- */ \
/* Diff markup */ \
LINE(DIFF, "diff --git ", COLOR_YELLOW, 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_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(DIFF_DISSIM, "dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
/* Pretty print commit header */ \
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, "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), \
LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
/* UI colors */ \
LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
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_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) \
LINE_##type
LINE_INFO
#undef LINE
};
struct line_info {
char *line; /* The start of line to match. */
int linelen; /* Size of string to match. */
int fg, bg, attr; /* Color and text attributes for the lines. */
};
static struct line_info line_info[] = {
#define LINE(type, line, fg, bg, attr) \
{ (line), STRING_SIZE(line), (fg), (bg), (attr) }
LINE_INFO
#undef LINE
};
static enum line_type
get_line_type(char *line)
{
int linelen = strlen(line);
enum line_type type;
for (type = 0; type < ARRAY_SIZE(line_info); type++)
/* Case insensitive search matches Signed-off-by lines better. */
if (linelen >= line_info[type].linelen &&
!strncasecmp(line_info[type].line, line, line_info[type].linelen))
return type;
return LINE_DEFAULT;
}
static inline int
get_line_attr(enum line_type type)
{
assert(type < ARRAY_SIZE(line_info));
return COLOR_PAIR(type) | line_info[type].attr;
}
static void
init_colors(void)
{
int default_bg = COLOR_BLACK;
int default_fg = COLOR_WHITE;
enum line_type type;
start_color();
if (use_default_colors() != ERR) {
default_bg = -1;
default_fg = -1;
}
for (type = 0; type < ARRAY_SIZE(line_info); type++) {
struct line_info *info = &line_info[type];
int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
init_pair(type, fg, bg);
}
}
/**
* 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 revisions. 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 */
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. */
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 */
char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
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 */
unsigned long lineno; /* Current line number */
/* Buffering */
unsigned long lines; /* Total number of lines */
void **line; /* Line index; each line contains user data */
unsigned int digits; /* Number of digits in the lines member. */
/* Loading */
FILE *pipe;
time_t start_time;
};
static struct view_ops pager_ops;
static struct view_ops main_ops;
static char ref_head[SIZEOF_REF] = "HEAD";
static char ref_commit[SIZEOF_REF] = "HEAD";
#define VIEW_STR(name, cmd, env, ref, objsize, ops) \
{ name, cmd, #env, ref, objsize, ops }
#define VIEW_(id, name, ops, ref, objsize) \
VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, objsize, ops)
static struct view views[] = {
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])
/* The display array of active views and the index of the current view. */
static struct view *display[2];
static unsigned int current_view;
#define foreach_view(view, i) \
for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
static void
redraw_view_from(struct view *view, int lineno)
{
assert(0 <= lineno && lineno < view->height);
for (; lineno < view->height; lineno++) {
if (!view->ops->draw(view, lineno))
break;
}
redrawwin(view->win);
wrefresh(view->win);
}
static void
redraw_view(struct view *view)
{
wclear(view->win);
redraw_view_from(view, 0);
}
static void
resize_display(void)
{
int offset, i;
struct view *base = display[0];
struct view *view = display[1] ? display[1] : display[0];
/* Setup window dimensions */
getmaxyx(stdscr, base->height, base->width);
/* Make room for the status window. */
base->height -= 1;
if (view != base) {
/* Horizontal split. */
view->width = base->width;
view->height = SCALE_SPLIT_VIEW(base->height);
base->height -= view->height;
/* Make room for the title bar. */
view->height -= 1;
}
/* Make room for the title bar. */
base->height -= 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 + 1, 0, offset, 0);
if (!view->win)
die("Failed to create %s view", view->name);
scrollok(view->win, TRUE);
view->title = newwin(1, 0, offset + view->height, 0);
if (!view->title)
die("Failed to create title window");
} else {
wresize(view->win, view->height + 1, view->width);
mvwin(view->win, offset, 0);
mvwin(view->title, offset + view->height, 0);
wrefresh(view->win);
}
offset += view->height + 1;
}
}
static void
update_view_title(struct view *view)
{
if (view == display[current_view])
wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
else
wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
werase(view->title);
wmove(view->title, 0, 0);
/* [main] ref: 334b506... - commit 6 of 4383 (0%) */
if (*view->ref)
wprintw(view->title, "[%s] %s", view->name, view->ref);
else
wprintw(view->title, "[%s]", view->name);
if (view->lines) {
wprintw(view->title, " - %s %d of %d (%d%%)",
view->ops->type,
view->lineno + 1,
view->lines,
(view->lineno + 1) * 100 / view->lines);
}
wrefresh(view->title);
}
/*
* Navigation
*/
/* Scrolling backend */
static void
do_scroll_view(struct view *view, int lines)
{
/* The rendering expects the new offset. */
view->offset += lines;
assert(0 <= view->offset && view->offset < view->lines);
assert(lines);
/* Redraw the whole screen if scrolling is pointless. */
if (view->height < ABS(lines)) {
redraw_view(view);
} else {
int line = lines > 0 ? view->height - lines : 0;
int end = line + ABS(lines);
wscrl(view->win, lines);
for (; line < end; line++) {
if (!view->ops->draw(view, line))
break;
}
}
/* Move current line into the view. */
if (view->lineno < view->offset) {
view->lineno = view->offset;
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);
}
assert(view->offset <= view->lineno && view->lineno < view->lines);
redrawwin(view->win);
wrefresh(view->win);
report("");
}
/* Scroll frontend */
static void
scroll_view(struct view *view, enum request request)
{
int lines = 1;
switch (request) {
case REQ_SCROLL_PAGE_DOWN:
lines = view->height;
case REQ_SCROLL_LINE_DOWN:
if (view->offset + lines > view->lines)
lines = view->lines - view->offset;
if (lines == 0 || view->offset + view->height >= view->lines) {
report("Cannot scroll beyond the last line");
return;
}
break;
case REQ_SCROLL_PAGE_UP:
lines = view->height;
case REQ_SCROLL_LINE_UP:
if (lines > view->offset)
lines = view->offset;
if (lines == 0) {
report("Cannot scroll beyond the first line");
return;
}
lines = -lines;
break;
default:
die("request %d not handled in switch", request);
}
do_scroll_view(view, lines);
}
/* Cursor moving */
static void
move_view(struct view *view, enum request request)
{
int steps;
switch (request) {
case REQ_MOVE_FIRST_LINE:
steps = -view->lineno;
break;
case REQ_MOVE_LAST_LINE:
steps = view->lines - view->lineno - 1;
break;
case REQ_MOVE_PAGE_UP:
steps = view->height > view->lineno
? -view->lineno : -view->height;
break;
case REQ_MOVE_PAGE_DOWN:
steps = view->lineno + view->height >= view->lines
? view->lines - view->lineno - 1 : view->height;
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;
default:
die("request %d not handled in switch", request);
}
if (steps <= 0 && view->lineno == 0) {
report("Cannot move beyond the first line");
return;
} else if (steps >= 0 && view->lineno + 1 >= view->lines) {
report("Cannot move beyond the last line");
return;
}
/* Move the current line */
view->lineno += steps;
assert(0 <= view->lineno && view->lineno < view->lines);
/* Repaint the old "current" line if we be scrolling */
if (ABS(steps) < view->height) {
int prev_lineno = view->lineno - steps - view->offset;
wmove(view->win, prev_lineno, 0);
wclrtoeol(view->win);
view->ops->draw(view, prev_lineno);
}
/* Check whether the view needs to be scrolled */
if (view->lineno < view->offset ||
view->lineno >= view->offset + view->height) {
if (steps < 0 && -steps > view->offset) {
steps = -view->offset;
} else if (steps > 0) {
if (view->lineno == view->lines - 1 &&
view->lines > view->height) {
steps = view->lines - view->offset - 1;
if (steps >= view->height)
steps -= view->height - 1;
}
}
do_scroll_view(view, steps);
return;
}
/* Draw the current line */
view->ops->draw(view, view->lineno - view->offset);
redrawwin(view->win);
wrefresh(view->win);
report("");
}
/*
* Incremental updating
*/
static bool
begin_update(struct view *view)
{
char *id = view->id;
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 {
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;
}
/* 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;
set_nonblocking_input(TRUE);
view->offset = 0;
view->lines = 0;
view->lineno = 0;
string_copy(view->vid, id);
if (view->line) {
int i;
for (i = 0; i < view->lines; i++)
if (view->line[i])
free(view->line[i]);
free(view->line);
view->line = NULL;
}
view->start_time = time(NULL);
return TRUE;
}
static void
end_update(struct view *view)
{
if (!view->pipe)
return;
set_nonblocking_input(FALSE);
if (view->pipe == stdin)
fclose(view->pipe);
else
pclose(view->pipe);
view->pipe = NULL;
}
static bool
update_view(struct view *view)
{
char buffer[BUFSIZ];
char *line;
void **tmp;
/* The number of lines to read. If too low it will cause too much
* redrawing (and possible flickering), if too high responsiveness
* will suffer. */
unsigned long lines = view->height;
int redraw_from = -1;
if (!view->pipe)
return TRUE;
/* Only redraw if lines are visible. */
if (view->offset + view->height >= view->lines)
redraw_from = view->lines - view->offset;
tmp = realloc(view->line, sizeof(*view->line) * (view->lines + lines));
if (!tmp)
goto alloc_error;
view->line = tmp;
while ((line = fgets(buffer, sizeof(buffer), view->pipe))) {
int linelen = strlen(line);
if (linelen)
line[linelen - 1] = 0;
if (!view->ops->read(view, line))
goto alloc_error;
if (lines-- == 1)
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;
}
}
if (redraw_from >= 0) {
/* If this is an incremental update, redraw the previous line
* since for commits some members could have changed when
* loading the main view. */
if (redraw_from > 0)
redraw_from--;
/* Incrementally draw avoids flickering. */
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;
} else if (feof(view->pipe)) {
time_t secs = time(NULL) - view->start_time;
if (view == VIEW(REQ_VIEW_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;
}
report("Loaded %d lines in %ld second%s", view->lines, secs,
secs == 1 ? "" : "s");
goto end;
}
return TRUE;
alloc_error:
report("Allocation failure");
end:
end_update(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
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;
/* Cycle between displayed views and count the views. */
foreach_view (displayed, nviews) {
if (prev != view &&
view == displayed &&
!strcmp(view->vid, prev->vid)) {
current_view = nviews;
/* Blur out the title of the previous view. */
update_view_title(prev);
report("");
return;
}
}
if (view == prev && nviews == 1 && !reload) {
report("Already in %s view", view->name);
return;
}
if ((reload || strcmp(view->vid, view->id)) &&
!begin_update(view)) {
report("Failed to load %s view", view->name);
return;
}
if (split) {
display[current_view + 1] = view;
if (!backgrounded)
current_view++;
} else {
/* Maximize the current view. */
memset(display, 0, sizeof(display));
current_view = 0;
display[current_view] = view;
}
resize_display();
if (split && prev->lineno - prev->offset >= prev->height) {
/* Take the title line into account. */
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. */
do_scroll_view(prev, lines);
}
if (prev && view != prev) {
/* "Blur" the previous view. */
if (!backgrounded)
update_view_title(prev);
/* Continue loading split views in the background. */
if (!split)
end_update(prev);
}
if (view->pipe) {
/* Clear the old view and let the incremental updating refill
* the screen. */
wclear(view->win);
report("Loading...");
} else {
redraw_view(view);
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);
}
/*
* User request switch noodle
*/
static int
view_driver(struct view *view, enum request request)
{
int i;
switch (request) {
case REQ_MOVE_UP:
case REQ_MOVE_DOWN:
case REQ_MOVE_PAGE_UP:
case REQ_MOVE_PAGE_DOWN:
case REQ_MOVE_FIRST_LINE:
case REQ_MOVE_LAST_LINE:
move_view(view, request);
break;
case REQ_SCROLL_LINE_DOWN:
case REQ_SCROLL_LINE_UP:
case REQ_SCROLL_PAGE_DOWN:
case REQ_SCROLL_PAGE_UP:
scroll_view(view, request);
break;
case REQ_VIEW_MAIN:
case REQ_VIEW_DIFF:
case REQ_VIEW_LOG:
case REQ_VIEW_HELP:
case REQ_VIEW_PAGER:
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");
break;
}
return view->ops->enter(view);
case REQ_VIEW_NEXT:
{
int nviews = display[1] ? 2 : 1;
int next_view = (current_view + 1) % nviews;
if (next_view == current_view) {
report("Only one view is displayed");
break;
}
current_view = next_view;
/* Blur out the title of the previous view. */
update_view_title(view);
report("");
break;
}
case REQ_TOGGLE_LINE_NUMBERS:
opt_line_number = !opt_line_number;
redraw_view(view);
update_view_title(view);
break;
case REQ_PROMPT:
/* Always reload^Wrerun commands from the prompt. */
open_view(view, opt_request, OPEN_RELOAD);
break;
case REQ_STOP_LOADING:
foreach_view (view, i) {
if (view->pipe)
report("Stopped loaded the %s view", view->name),
end_update(view);
}
break;
case REQ_SHOW_VERSION:
report("Version: %s", VERSION);
return TRUE;
case REQ_SCREEN_RESIZE:
resize_display();
/* Fall-through */
case REQ_SCREEN_REDRAW:
foreach_view (view, i) {
redraw_view(view);
update_view_title(view);
}
break;
case REQ_SCREEN_UPDATE:
doupdate();
return TRUE;
case REQ_QUIT:
return FALSE;
default:
/* An unknown key will show most commonly used commands. */
report("Unknown key, press 'h' for help");
return TRUE;
}
return TRUE;
}
/*
* View backend handlers
*/
static bool
pager_draw(struct view *view, unsigned int lineno)
{
enum line_type type;
char *line;
int linelen;
int attr;
if (view->offset + lineno >= view->lines)
return FALSE;
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);
string_copy(ref_commit, view->ref);
}
type = LINE_CURSOR;
wchgat(view->win, -1, 0, type, NULL);
}
attr = get_line_attr(type);
wattrset(view->win, attr);
linelen = strlen(line);
if (opt_line_number || opt_tab_size < TABSIZE) {
static char spaces[] = " ";
int col_offset = 0, col = 0;
if (opt_line_number) {
unsigned long real_lineno = view->offset + lineno + 1;
if (real_lineno == 1 ||
(real_lineno % opt_num_interval) == 0) {
wprintw(view->win, "%.*d", view->digits, real_lineno);
} 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;
if (*line == '\t') {
assert(sizeof(spaces) > TABSIZE);
line++;
text = spaces;
cols = opt_tab_size - (col % opt_tab_size);
} else {
line = strchr(line, '\t');
cols = line ? line - text : strlen(text);
}
waddnstr(view->win, text, MIN(cols, cols_max));
col += cols;
}
} else {
int col = 0, pos = 0;
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)
{
/* Compress empty lines in the help view. */
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;
view->lines++;
return TRUE;
}
static bool
pager_enter(struct view *view)
{
char *line = view->line[view->lineno];
if (get_line_type(line) == LINE_COMMIT) {
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 col = 0;
size_t timelen;
if (view->offset + lineno >= view->lines)
return FALSE;
commit = view->line[view->offset + lineno];
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));
}
timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
waddnstr(view->win, buf, timelen);
waddstr(view->win, " ");
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);
if (type != LINE_CURSOR)
wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
waddch(view->win, '~');
} else {
waddstr(view->win, commit->author);
}
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;
}
/* Reads git log --pretty=raw output and parses it into the commit struct. */
static bool
main_read(struct view *view, char *line)
{
enum line_type type = get_line_type(line);
struct commit *commit;
switch (type) {
case LINE_COMMIT:
commit = calloc(1, sizeof(struct commit));
if (!commit)
return FALSE;
line += STRING_SIZE("commit ");
view->line[view->lines++] = commit;
string_copy(commit->id, line);
commit->refs = get_refs(commit->id);
break;
case LINE_AUTHOR:
{
char *ident = line + STRING_SIZE("author ");
char *end = strchr(ident, '<');
if (end) {
for (; end > ident && isspace(end[-1]); end--) ;
*end = 0;
}
commit = view->line[view->lines - 1];
string_copy(commit->author, ident);
/* Parse epoch and timezone */
if (end) {
char *secs = strchr(end + 1, '>');
char *zone;
time_t time;
if (!secs || secs[1] != ' ')
break;
secs += 2;
time = (time_t) atol(secs);
zone = strchr(secs, ' ');
if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
long tz;
zone++;
tz = ('0' - zone[1]) * 60 * 60 * 10;
tz += ('0' - zone[2]) * 60 * 60;
tz += ('0' - zone[3]) * 60;
tz += ('0' - zone[4]) * 60;
if (zone[0] == '-')
tz = -tz;
time -= tz;
}
gmtime_r(&time, &commit->time);
}
break;
}
default:
/* We should only ever end up here if there has already been a
* commit line, however, be safe. */
if (view->lines == 0)
break;
/* Fill in the commit title if it has not already been set. */
commit = view->line[view->lines - 1];
if (commit->title[0])
break;
/* 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[4]))
break;
string_copy(commit->title, line + 4);
}
return TRUE;
}
static bool
main_enter(struct view *view)
{
open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT | OPEN_BACKGROUNDED);
return TRUE;
}
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
*/
/* Whether or not the curses interface has been initialized. */
bool cursed = FALSE;
/* The status window is used for polling keystrokes. */
static WINDOW *status_win;
/* Update status and title window. */
static void
report(const char *msg, ...)
{
static bool empty = TRUE;
struct view *view = display[current_view];
if (!empty || *msg) {
va_list args;
va_start(args, msg);
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);
}
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(bool loading)
{
static unsigned int loading_views;
if ((loading == FALSE && loading_views-- == 1) ||
(loading == TRUE && loading_views++ == 0))
nodelay(status_win, loading);
}
static void
init_display(void)
{
int x, y;
/* 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 */
leaveok(stdscr, TRUE);
if (has_colors())
init_colors();
getmaxyx(stdscr, y, x);
status_win = newwin(1, 0, y - 1, 0);
if (!status_win)
die("Failed to create status window");
/* Enable keyboard mapping */
keypad(status_win, TRUE);
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
*/
static void
quit(int sig)
{
/* XXX: Restore tty modes and let the OS cleanup the rest! */
if (cursed)
endwin();
exit(0);
}
static void
die(const char *err, ...)
{
va_list args;
endwin();
va_start(args, err);
fputs("tig: ", stderr);
vfprintf(stderr, err, args);
fputs("\n", stderr);
va_end(args);
exit(1);
}
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)) {
int key;
int i;
foreach_view (view, i)
update_view(view);
/* Refresh, accept single keystroke of input */
key = wgetch(status_win);
request = get_request(key);
/* 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. */
nocbreak();
echo();
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();
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;
}
}
quit(0);
return 0;
}
/**
* [[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.
*
* - Searching.
*
* - Locale support.
*
* COPYRIGHT
* ---------
* Copyright (c) Jonas Fonseca <fonseca@xxxxxxx>, 2006
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* SEE ALSO
* --------
* [verse]
* link:http://www.kernel.org/pub/software/scm/git/docs/[git(7)],
* link:http://www.kernel.org/pub/software/scm/cogito/docs/[cogito(7)]
* gitk(1): git repository browser written using tcl/tk,
* qgit(1): git repository browser written using c++/Qt,
* gitview(1): git repository browser written using python/gtk.
**/
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