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unpack-trees: introduce preserve_ignored to unpack_trees_options

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Currently, every caller of unpack_trees() that wants to ensure ignored
files are overwritten by default needs to:
   * allocate unpack_trees_options.dir
   * flip the DIR_SHOW_IGNORED flag in unpack_trees_options.dir->flags
   * call setup_standard_excludes
AND then after the call to unpack_trees() needs to
   * call dir_clear()
   * deallocate unpack_trees_options.dir
That's a fair amount of boilerplate, and every caller uses identical
code.  Make this easier by instead introducing a new boolean value where
the default value (0) does what we want so that new callers of
unpack_trees() automatically get the appropriate behavior.  And move all
the handling of unpack_trees_options.dir into unpack_trees() itself.

While preserve_ignored = 0 is the behavior we feel is the appropriate
default, we defer fixing commands to use the appropriate default until a
later commit.  So, this commit introduces several locations where we
manually set preserve_ignored=1.  This makes it clear where code paths
were previously preserving ignored files when they should not have been;
a future commit will flip these to instead use a value of 0 to get the
behavior we want.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Elijah Newren
2021-09-27 16:33:41 +00:00
committed by Junio C Hamano
parent 491a7575f1
commit 04988c8d18
14 changed files with 35 additions and 40 deletions
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13
builtin/read-tree.c
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@ -201,11 +201,9 @@ int cmd_read_tree(int argc, const char **argv, const char *cmd_prefix)
if ((opts.update || opts.index_only) && !opts.merge)
die("%s is meaningless without -m, --reset, or --prefix",
opts.update ? "-u" : "-i");
if (opts.update && !opts.reset) {
CALLOC_ARRAY(opts.dir, 1);
opts.dir->flags |= DIR_SHOW_IGNORED;
setup_standard_excludes(opts.dir);
}
if (opts.update && !opts.reset)
opts.preserve_ignored = 0;
/* otherwise, opts.preserve_ignored is irrelevant */
if (opts.merge && !opts.index_only)
setup_work_tree();
@ -245,11 +243,6 @@ int cmd_read_tree(int argc, const char **argv, const char *cmd_prefix)
if (unpack_trees(nr_trees, t, &opts))
return 128;
if (opts.dir) {
dir_clear(opts.dir);
FREE_AND_NULL(opts.dir);
}
if (opts.debug_unpack || opts.dry_run)
return 0; /* do not write the index out */