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[RFC/PATCHv7 15/22] Notes API: get_commit_notes() -> format_note() + remove the commit restriction

From
Johan Herland <johan@herland.net>
Date
Oct 9, 2009, 10:22 UTC
Message-ID
<1255083738-23263-17-git-send-email-johan@herland.net>
In-Reply-To
<1255083738-23263-1-git-send-email-johan@herland.net>

There is really no reason why only commit objects can be annotated. By changing the struct commit parameter to get_commit_notes() into a sha1 we gain the ability to annotate any object type. To reflect this in the function naming as well, we rename get_commit_notes() to format_note().

This patch also fixes comments and variable names throughout notes.c as a consequence of the removal of the unnecessary 'commit' restriction.

Signed-off-by: Johan Herland <johan@herland.net>
---
 notes.c  |   33 ++++++++++++++++-----------------
 notes.h  |   11 ++++++++++-
 pretty.c |    8 ++++----
 3 files changed, 30 insertions(+), 22 deletions(-)
diff --git a/notes.c b/notes.c
index 50a4672..0f7082f 100644
--- a/notes.c
+++ b/notes.c
@@ -1,5 +1,4 @@
 #include "cache.h"
-#include "commit.h"
 #include "notes.h"
 #include "refs.h"
 #include "utf8.h"
@@ -25,10 +24,10 @@ struct int_node {
 /*
  * Leaf nodes come in two variants, note entries and subtree entries,
  * distinguished by the LSb of the leaf node pointer (see above).
- * As a note entry, the key is the SHA1 of the referenced commit, and the
+ * As a note entry, the key is the SHA1 of the referenced object, and the
  * value is the SHA1 of the note object.
  * As a subtree entry, the key is the prefix SHA1 (w/trailing NULs) of the
- * referenced commit, using the last byte of the key to store the length of
+ * referenced object, using the last byte of the key to store the length of
  * the prefix. The value is the SHA1 of the tree object containing the notes
  * subtree.
  */
@@ -211,7 +210,7 @@ static void note_tree_insert(struct int_node *tree, unsigned char n,
 				if (concatenate_notes(l->val_sha1,
 						entry->val_sha1))
 					die("failed to concatenate note %s "
-					    "into note %s for commit %s",
+					    "into note %s for object %s",
 					    sha1_to_hex(entry->val_sha1),
 					    sha1_to_hex(l->val_sha1),
 					    sha1_to_hex(l->key_sha1));
@@ -299,7 +298,7 @@ static int get_sha1_hex_segment(const char *hex, unsigned int hex_len,
 static void load_subtree(struct leaf_node *subtree, struct int_node *node,
 		unsigned int n)
 {
-	unsigned char commit_sha1[20];
+	unsigned char object_sha1[20];
 	unsigned int prefix_len;
 	void *buf;
 	struct tree_desc desc;
@@ -312,23 +311,23 @@ static void load_subtree(struct leaf_node *subtree, struct int_node *node,
 
 	prefix_len = subtree->key_sha1[19];
 	assert(prefix_len * 2 >= n);
-	memcpy(commit_sha1, subtree->key_sha1, prefix_len);
+	memcpy(object_sha1, subtree->key_sha1, prefix_len);
 	while (tree_entry(&desc, &entry)) {
 		int len = get_sha1_hex_segment(entry.path, strlen(entry.path),
-				commit_sha1 + prefix_len, 20 - prefix_len);
+				object_sha1 + prefix_len, 20 - prefix_len);
 		if (len < 0)
 			continue; /* entry.path is not a SHA1 sum. Skip */
 		len += prefix_len;
 
 		/*
-		 * If commit SHA1 is complete (len == 20), assume note object
-		 * If commit SHA1 is incomplete (len < 20), assume note subtree
+		 * If object SHA1 is complete (len == 20), assume note object
+		 * If object SHA1 is incomplete (len < 20), assume note subtree
 		 */
 		if (len <= 20) {
 			unsigned char type = PTR_TYPE_NOTE;
 			struct leaf_node *l = (struct leaf_node *)
 				xcalloc(sizeof(struct leaf_node), 1);
-			hashcpy(l->key_sha1, commit_sha1);
+			hashcpy(l->key_sha1, object_sha1);
 			hashcpy(l->val_sha1, entry.sha1);
 			if (len < 20) {
 				l->key_sha1[19] = (unsigned char) len;
@@ -342,12 +341,12 @@ static void load_subtree(struct leaf_node *subtree, struct int_node *node,
 
 static void initialize_notes(const char *notes_ref_name)
 {
-	unsigned char sha1[20], commit_sha1[20];
+	unsigned char sha1[20], object_sha1[20];
 	unsigned mode;
 	struct leaf_node root_tree;
 
-	if (!notes_ref_name || read_ref(notes_ref_name, commit_sha1) ||
-	    get_tree_entry(commit_sha1, "", sha1, &mode))
+	if (!notes_ref_name || read_ref(notes_ref_name, object_sha1) ||
+	    get_tree_entry(object_sha1, "", sha1, &mode))
 		return;
 
 	hashclr(root_tree.key_sha1);
@@ -355,9 +354,9 @@ static void initialize_notes(const char *notes_ref_name)
 	load_subtree(&root_tree, &root_node, 0);
 }
 
-static unsigned char *lookup_notes(const unsigned char *commit_sha1)
+static unsigned char *lookup_notes(const unsigned char *object_sha1)
 {
-	struct leaf_node *found = note_tree_find(&root_node, 0, commit_sha1);
+	struct leaf_node *found = note_tree_find(&root_node, 0, object_sha1);
 	if (found)
 		return found->val_sha1;
 	return NULL;
@@ -370,7 +369,7 @@ void free_notes(void)
 	initialized = 0;
 }
 
-void get_commit_notes(const struct commit *commit, struct strbuf *sb,
+void format_note(const unsigned char *object_sha1, struct strbuf *sb,
 		const char *output_encoding, int flags)
 {
 	static const char utf8[] = "utf-8";
@@ -389,7 +388,7 @@ void get_commit_notes(const struct commit *commit, struct strbuf *sb,
 		initialized = 1;
 	}
 
-	sha1 = lookup_notes(commit->object.sha1);
+	sha1 = lookup_notes(object_sha1);
 	if (!sha1)
 		return;
 
diff --git a/notes.h b/notes.h
index a1421e3..d745ed1 100644
--- a/notes.h
+++ b/notes.h
@@ -4,10 +4,19 @@
 /* Free (and de-initialize) the internal notes tree structure */
 void free_notes(void);
 
+/* Flags controlling how notes are formatted */
 #define NOTES_SHOW_HEADER 1
 #define NOTES_INDENT 2
 
-void get_commit_notes(const struct commit *commit, struct strbuf *sb,
+/*
+ * Fill the given strbuf with the notes associated with the given object.
+ *
+ * If the internal notes structure is not initialized, it will be auto-
+ * initialized to the default value (see documentation for init_notes() above).
+ *
+ * 'flags' is a bitwise combination of the above formatting flags.
+ */
+void format_note(const unsigned char *object_sha1, struct strbuf *sb,
 		const char *output_encoding, int flags);
 
 #endif
diff --git a/pretty.c b/pretty.c
index 7f350bb..81791f5 100644
--- a/pretty.c
+++ b/pretty.c
@@ -703,8 +703,8 @@ static size_t format_commit_item(struct strbuf *sb, const char *placeholder,
 		format_decoration(sb, commit);
 		return 1;
 	case 'N':
-		get_commit_notes(commit, sb, git_log_output_encoding ?
-			     git_log_output_encoding : git_commit_encoding, 0);
+		format_note(commit->object.sha1, sb, git_log_output_encoding ?
+			    git_log_output_encoding : git_commit_encoding, 0);
 		return 1;
 	}
 
@@ -982,8 +982,8 @@ void pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit,
 		strbuf_addch(sb, '\n');
 
 	if (fmt != CMIT_FMT_ONELINE)
-		get_commit_notes(commit, sb, encoding,
-				 NOTES_SHOW_HEADER | NOTES_INDENT);
+		format_note(commit->object.sha1, sb, encoding,
+			    NOTES_SHOW_HEADER | NOTES_INDENT);
 
 	free(reencoded);
 }

-- 
1.6.4.304.g1365c.dirty
Previous: Johan HerlandNext: Johan Herland
Message 24 of 33 in “[RFC/PATCHv7 00/22] git notes”
  1. Johan HerlandOct 9, 2009
  2. Johan HerlandOct 9, 2009
  3. Johan HerlandOct 9, 2009
  4. 01/22 Introduce commit notesJohan Herland, Oct 9, 2009
  5. 02/22 Add a script to edit/inspect notesJohan Herland, Oct 9, 2009
  6. 03/22 Speed up git notes lookupJohan Herland, Oct 9, 2009
  7. 04/22 Add an expensive test for git-notesJohan Herland, Oct 9, 2009
  8. 05/22 Teach "-m <msg>" and "-F <file>" to "git notes edit"Johan Herland, Oct 9, 2009
  9. 06/22 fast-import: Add support for importing commit notesJohan Herland, Oct 9, 2009
  10. [RFC] fast-import: notemodify (N) commandJonathan Nieder, Jan 31, 2011
  11. Sverre RabbelierJan 31, 2011
  12. Jonathan NiederJan 31, 2011
  13. Sverre RabbelierJan 31, 2011
  14. Sam VilainJan 31, 2011
  15. Sverre RabbelierFeb 1, 2011
  16. 07/22 t3302-notes-index-expensive: Speed up create_repo()Johan Herland, Oct 9, 2009
  17. 08/22 Add flags to get_commit_notes() to control the format of the note stringJohan Herland, Oct 9, 2009
  18. 09/22 Add '%N'-format for pretty-printing commit notesJohan Herland, Oct 9, 2009
  19. 10/22 Teach notes code to free its internal data structures on requestJohan Herland, Oct 9, 2009
  20. 11/22 Teach the notes lookup code to parse notes trees with various fanout schemesJohan Herland, Oct 9, 2009
  21. 12/22 Add selftests verifying that we can parse notes trees with various fanoutsJohan Herland, Oct 9, 2009
  22. 13/22 Refactor notes code to concatenate multiple notes annotating the same objectJohan Herland, Oct 9, 2009
  23. 14/22 Add selftests verifying concatenation of multiple notes for the same commitJohan Herland, Oct 9, 2009
  24. 15/22 Notes API: get_commit_notes() -> format_note() + remove the commit restrictionJohan Herland, Oct 9, 2009
  25. 16/22 Notes API: init_notes(): Initialize the notes tree from the given notes refJohan Herland, Oct 9, 2009
  26. 17/22 Notes API: add_note(): Add note objects to the internal notes tree structureJohan Herland, Oct 9, 2009
  27. 18/22 Notes API: get_note(): Return the note annotating the given objectJohan Herland, Oct 9, 2009
  28. 19/22 Notes API: for_each_note(): Traverse the entire notes tree with a callbackJohan Herland, Oct 9, 2009
  29. 20/22 Notes API: Allow multiple concurrent notes trees with new struct notes_treeJohan Herland, Oct 9, 2009
  30. 21/22 Refactor notes concatenation into a flexible interface for combining notesJohan Herland, Oct 9, 2009
  31. 22/22 fast-import: Proper notes tree manipulation using the notes APIJohan Herland, Oct 9, 2009
  32. Shawn O. PearceOct 9, 2009
  33. Johan HerlandNov 20, 2009

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