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Revision 663b2b1b90bf76275044824ddeca96aaec240f09 authored by Derrick Stolee on 17 September 2020, 18:11:46 UTC, committed by Junio C Hamano on 17 September 2020, 18:30:05 UTC 
maintenance: add commit-graph task
 
The first new task in the 'git maintenance' builtin is the
'commit-graph' task. This updates the commit-graph file
incrementally with the command

	git commit-graph write --reachable --split

By writing an incremental commit-graph file using the "--split"
option we minimize the disruption from this operation. The default
behavior is to merge layers until the new "top" layer is less than
half the size of the layer below. This provides quick writes most
of the time, with the longer writes following a power law
distribution.

Most importantly, concurrent Git processes only look at the
commit-graph-chain file for a very short amount of time, so they
will verly likely not be holding a handle to the file when we try
to replace it. (This only matters on Windows.)

If a concurrent process reads the old commit-graph-chain file, but
our job expires some of the .graph files before they can be read,
then those processes will see a warning message (but not fail).
This could be avoided by a future update to use the --expire-time
argument when writing the commit-graph.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
1 parent 3103e98
Raw File
mailinfo.h 
#ifndef MAILINFO_H
#define MAILINFO_H

#include "strbuf.h"

#define MAX_BOUNDARIES 5

struct mailinfo {
	FILE *input;
	FILE *output;
	FILE *patchfile;

	struct strbuf name;
	struct strbuf email;
	int keep_subject;
	int keep_non_patch_brackets_in_subject;
	int add_message_id;
	int use_scissors;
	int use_inbody_headers;
	const char *metainfo_charset;

	struct strbuf *content[MAX_BOUNDARIES];
	struct strbuf **content_top;
	struct strbuf charset;
	unsigned int format_flowed:1;
	unsigned int delsp:1;
	char *message_id;
	enum  {
		TE_DONTCARE, TE_QP, TE_BASE64
	} transfer_encoding;
	int patch_lines;
	int filter_stage; /* still reading log or are we copying patch? */
	int header_stage; /* still checking in-body headers? */
	struct strbuf inbody_header_accum;
	struct strbuf **p_hdr_data;
	struct strbuf **s_hdr_data;

	struct strbuf log_message;
	int input_error;
};

void setup_mailinfo(struct mailinfo *);
int mailinfo(struct mailinfo *, const char *msg, const char *patch);
void clear_mailinfo(struct mailinfo *);

#endif /* MAILINFO_H */
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