Merge branch 'jc/add-ita'

* jc/add-ita:
  git-add --intent-to-add (-N)

diff --git a/builtin-add.c b/builtin-add.c
index 7c874e31154a4c3f96b3403db1bdcb0b36fdec3e..ea4e77169a782ef38ed1c0524952a7220cbf739d 100644 (file)
--- a/builtin-add.c
+++ b/builtin-add.c
@@ -166,7 +166,7 @@ static const char ignore_error[] =
 "The following paths are ignored by one of your .gitignore files:\n";
 
 static int verbose = 0, show_only = 0, ignored_too = 0, refresh_only = 0;
-static int ignore_add_errors, addremove;
+static int ignore_add_errors, addremove, intent_to_add;
 
 static struct option builtin_add_options[] = {
        OPT__DRY_RUN(&show_only),
@@ -176,6 +176,7 @@ static struct option builtin_add_options[] = {
        OPT_BOOLEAN('p', "patch", &patch_interactive, "interactive patching"),
        OPT_BOOLEAN('f', "force", &ignored_too, "allow adding otherwise ignored files"),
        OPT_BOOLEAN('u', "update", &take_worktree_changes, "update tracked files"),
+       OPT_BOOLEAN('N', "intent-to-add", &intent_to_add, "record only the fact that the path will be added later"),
        OPT_BOOLEAN('A', "all", &addremove, "add all, noticing removal of tracked files"),
        OPT_BOOLEAN( 0 , "refresh", &refresh_only, "don't add, only refresh the index"),
        OPT_BOOLEAN( 0 , "ignore-errors", &ignore_add_errors, "just skip files which cannot be added because of errors"),
@@ -246,6 +247,7 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 
        flags = ((verbose ? ADD_CACHE_VERBOSE : 0) |
                 (show_only ? ADD_CACHE_PRETEND : 0) |
+                (intent_to_add ? ADD_CACHE_INTENT : 0) |
                 (ignore_add_errors ? ADD_CACHE_IGNORE_ERRORS : 0) |
                 (!(addremove || take_worktree_changes)
                  ? ADD_CACHE_IGNORE_REMOVAL : 0));

diff --git a/cache.h b/cache.h
index 9f4e5c0d459dcf73c86ef977469ba4885cc8f4c2..b5a5e03ac833468e952481858b23b332634f3b94 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -377,6 +377,7 @@ extern int index_name_pos(const struct index_state *, const char *name, int name
 #define ADD_CACHE_OK_TO_REPLACE 2      /* Ok to replace file/directory */
 #define ADD_CACHE_SKIP_DFCHECK 4       /* Ok to skip DF conflict checks */
 #define ADD_CACHE_JUST_APPEND 8                /* Append only; tree.c::read_tree() */
+#define ADD_CACHE_NEW_ONLY 16          /* Do not replace existing ones */
 extern int add_index_entry(struct index_state *, struct cache_entry *ce, int option);
 extern struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really);
 extern void rename_index_entry_at(struct index_state *, int pos, const char *new_name);
@@ -386,6 +387,7 @@ extern int remove_file_from_index(struct index_state *, const char *path);
 #define ADD_CACHE_PRETEND 2
 #define ADD_CACHE_IGNORE_ERRORS        4
 #define ADD_CACHE_IGNORE_REMOVAL 8
+#define ADD_CACHE_INTENT 16
 extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
 extern int add_file_to_index(struct index_state *, const char *path, int flags);
 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);

diff --git a/read-cache.c b/read-cache.c
index 901064bf1ae72aacb583ff735058eec953475ae3..d7900f33ea472e6781ba68b3943cb29ae0a1db34 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -13,6 +13,7 @@
 #include "diff.h"
 #include "diffcore.h"
 #include "revision.h"
+#include "blob.h"
 
 /* Index extensions.
  *
@@ -511,6 +512,14 @@ static struct cache_entry *create_alias_ce(struct cache_entry *ce, struct cache_
        return new;
 }
 
+static void record_intent_to_add(struct cache_entry *ce)
+{
+       unsigned char sha1[20];
+       if (write_sha1_file("", 0, blob_type, sha1))
+               die("cannot create an empty blob in the object database");
+       hashcpy(ce->sha1, sha1);
+}
+
 int add_to_index(struct index_state *istate, const char *path, struct stat *st, int flags)
 {
        int size, namelen, was_same;
@@ -519,6 +528,9 @@ int add_to_index(struct index_state *istate, const char *path, struct stat *st,
        unsigned ce_option = CE_MATCH_IGNORE_VALID|CE_MATCH_RACY_IS_DIRTY;
        int verbose = flags & (ADD_CACHE_VERBOSE | ADD_CACHE_PRETEND);
        int pretend = flags & ADD_CACHE_PRETEND;
+       int intent_only = flags & ADD_CACHE_INTENT;
+       int add_option = (ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE|
+                         (intent_only ? ADD_CACHE_NEW_ONLY : 0));
 
        if (!S_ISREG(st_mode) && !S_ISLNK(st_mode) && !S_ISDIR(st_mode))
                return error("%s: can only add regular files, symbolic links or git-directories", path);
@@ -532,7 +544,8 @@ int add_to_index(struct index_state *istate, const char *path, struct stat *st,
        ce = xcalloc(1, size);
        memcpy(ce->name, path, namelen);
        ce->ce_flags = namelen;
-       fill_stat_cache_info(ce, st);
+       if (!intent_only)
+               fill_stat_cache_info(ce, st);
 
        if (trust_executable_bit && has_symlinks)
                ce->ce_mode = create_ce_mode(st_mode);
@@ -555,8 +568,12 @@ int add_to_index(struct index_state *istate, const char *path, struct stat *st,
                alias->ce_flags |= CE_ADDED;
                return 0;
        }
-       if (index_path(ce->sha1, path, st, 1))
-               return error("unable to index file %s", path);
+       if (!intent_only) {
+               if (index_path(ce->sha1, path, st, 1))
+                       return error("unable to index file %s", path);
+       } else
+               record_intent_to_add(ce);
+
        if (ignore_case && alias && different_name(ce, alias))
                ce = create_alias_ce(ce, alias);
        ce->ce_flags |= CE_ADDED;
@@ -569,7 +586,7 @@ int add_to_index(struct index_state *istate, const char *path, struct stat *st,
 
        if (pretend)
                ;
-       else if (add_index_entry(istate, ce, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE))
+       else if (add_index_entry(istate, ce, add_option))
                return error("unable to add %s to index",path);
        if (verbose && !was_same)
                printf("add '%s'\n", path);
@@ -848,13 +865,15 @@ static int add_index_entry_with_check(struct index_state *istate, struct cache_e
        int ok_to_add = option & ADD_CACHE_OK_TO_ADD;
        int ok_to_replace = option & ADD_CACHE_OK_TO_REPLACE;
        int skip_df_check = option & ADD_CACHE_SKIP_DFCHECK;
+       int new_only = option & ADD_CACHE_NEW_ONLY;
 
        cache_tree_invalidate_path(istate->cache_tree, ce->name);
        pos = index_name_pos(istate, ce->name, ce->ce_flags);
 
        /* existing match? Just replace it. */
        if (pos >= 0) {
-               replace_index_entry(istate, pos, ce);
+               if (!new_only)
+                       replace_index_entry(istate, pos, ce);
                return 0;
        }
        pos = -pos-1;

diff --git a/t/t2203-add-intent.sh b/t/t2203-add-intent.sh
new file mode 100755 (executable)
index 0000000..d4de35e
--- /dev/null
+++ b/t/t2203-add-intent.sh
@@ -0,0 +1,36 @@
+#!/bin/sh
+
+test_description='Intent to add'
+
+. ./test-lib.sh
+
+test_expect_success 'intent to add' '
+       echo hello >file &&
+       echo hello >elif &&
+       git add -N file &&
+       git add elif
+'
+
+test_expect_success 'check result of "add -N"' '
+       git ls-files -s file >actual &&
+       empty=$(git hash-object --stdin </dev/null) &&
+       echo "100644 $empty 0   file" >expect &&
+       test_cmp expect actual
+'
+
+test_expect_success 'intent to add is just an ordinary empty blob' '
+       git add -u &&
+       git ls-files -s file >actual &&
+       git ls-files -s elif | sed -e "s/elif/file/" >expect &&
+       test_cmp expect actual
+'
+
+test_expect_success 'intent to add does not clobber existing paths' '
+       git add -N file elif &&
+       empty=$(git hash-object --stdin </dev/null) &&
+       git ls-files -s >actual &&
+       ! grep "$empty" actual
+'
+
+test_done
+