man pages are littered with .ft C and others
[git/git.git] / builtin-write-tree.c
CommitLineData
8bc9a0c7
LT
1/*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 */
8ed05fb5 6#include "builtin.h"
e83c5163 7#include "cache.h"
8e440259 8#include "tree.h"
a52139b4 9#include "cache-tree.h"
e83c5163 10
6bd20358
JH
11static const char write_tree_usage[] =
12"git-write-tree [--missing-ok] [--prefix=<prefix>/]";
75a46f6b 13
8ed05fb5 14int write_tree(unsigned char *sha1, int missing_ok, const char *prefix)
d6d3f9d0 15{
bad68ec9 16 int entries, was_valid, newfd;
a52139b4 17
8ed05fb5 18 /* We can't free this memory, it becomes part of a linked list parsed atexit() */
928e47e3 19 struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
53228a5f 20
30ca07a2 21 newfd = hold_locked_index(lock_file, 1);
d6d3f9d0 22
8ed05fb5 23 entries = read_cache();
c899350e 24 if (entries < 0)
667bb59b 25 die("git-write-tree: error reading cache");
c347ea5d 26
bad68ec9
JH
27 if (!active_cache_tree)
28 active_cache_tree = cache_tree();
29
30 was_valid = cache_tree_fully_valid(active_cache_tree);
8ed05fb5 31
bad68ec9
JH
32 if (!was_valid) {
33 if (cache_tree_update(active_cache_tree,
34 active_cache, active_nr,
2956dd3b 35 missing_ok, 0) < 0)
bad68ec9
JH
36 die("git-write-tree: error building trees");
37 if (0 <= newfd) {
4ed7cd3a
BC
38 if (!write_cache(newfd, active_cache, active_nr) &&
39 !commit_lock_file(lock_file))
c21aa54e 40 newfd = -1;
bad68ec9
JH
41 }
42 /* Not being able to write is fine -- we are only interested
43 * in updating the cache-tree part, and if the next caller
44 * ends up using the old index with unupdated cache-tree part
45 * it misses the work we did here, but that is just a
46 * performance penalty and not a big deal.
47 */
48 }
8ed05fb5 49
6bd20358
JH
50 if (prefix) {
51 struct cache_tree *subtree =
52 cache_tree_find(active_cache_tree, prefix);
b87841e1
NTND
53 if (!subtree)
54 die("git-write-tree: prefix %s not found", prefix);
e702496e 55 hashcpy(sha1, subtree->sha1);
6bd20358
JH
56 }
57 else
e702496e 58 hashcpy(sha1, active_cache_tree->sha1);
8ed05fb5 59
c21aa54e 60 if (0 <= newfd)
4ed7cd3a 61 rollback_lock_file(lock_file);
8ed05fb5 62
e83c5163
LT
63 return 0;
64}
8ed05fb5 65
a633fca0 66int cmd_write_tree(int argc, const char **argv, const char *unused_prefix)
8ed05fb5
LS
67{
68 int missing_ok = 0, ret;
69 const char *prefix = NULL;
70 unsigned char sha1[20];
71
9ec398d2 72 git_config(git_default_config);
8ed05fb5
LS
73 while (1 < argc) {
74 const char *arg = argv[1];
75 if (!strcmp(arg, "--missing-ok"))
76 missing_ok = 1;
cc44c765 77 else if (!prefixcmp(arg, "--prefix="))
8ed05fb5
LS
78 prefix = arg + 9;
79 else
8cdf3364 80 usage(write_tree_usage);
8ed05fb5
LS
81 argc--; argv++;
82 }
83
84 if (argc > 2)
85 die("too many options");
86
87 ret = write_tree(sha1, missing_ok, prefix);
88 printf("%s\n", sha1_to_hex(sha1));
89
90 return ret;
91}