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120 lines
2.6 KiB
120 lines
2.6 KiB
#include "pull.h" |
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#include "cache.h" |
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#include "commit.h" |
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#include "tree.h" |
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int get_tree = 0; |
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int get_history = 0; |
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int get_delta = 1; |
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int get_all = 0; |
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int get_verbosely = 0; |
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static unsigned char current_commit_sha1[20]; |
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static const char commitS[] = "commit"; |
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static const char treeS[] = "tree"; |
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static const char blobS[] = "blob"; |
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void pull_say(const char *fmt, const char *hex) { |
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if (get_verbosely) |
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fprintf(stderr, fmt, hex); |
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} |
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static void report_missing(const char *what, const unsigned char *missing) |
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{ |
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char missing_hex[41]; |
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strcpy(missing_hex, sha1_to_hex(missing));; |
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fprintf(stderr, |
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"Cannot obtain needed %s %s\nwhile processing commit %s.\n", |
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what, missing_hex, sha1_to_hex(current_commit_sha1)); |
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} |
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static int make_sure_we_have_it(const char *what, unsigned char *sha1) |
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{ |
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int status; |
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if (has_sha1_file(sha1)) |
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return 0; |
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status = fetch(sha1); |
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if (status && what) |
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report_missing(what, sha1); |
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if (get_delta) { |
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char delta_sha1[20]; |
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status = sha1_delta_base(sha1, delta_sha1); |
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if (0 < status) |
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status = make_sure_we_have_it(what, delta_sha1); |
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} |
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return status; |
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} |
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static int process_tree(unsigned char *sha1) |
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{ |
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struct tree *tree = lookup_tree(sha1); |
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struct tree_entry_list *entries; |
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if (parse_tree(tree)) |
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return -1; |
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for (entries = tree->entries; entries; entries = entries->next) { |
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const char *what = entries->directory ? treeS : blobS; |
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if (make_sure_we_have_it(what, entries->item.tree->object.sha1)) |
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return -1; |
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if (entries->directory) { |
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if (process_tree(entries->item.tree->object.sha1)) |
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return -1; |
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} |
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} |
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return 0; |
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} |
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static int process_commit(unsigned char *sha1) |
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{ |
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struct commit *obj = lookup_commit(sha1); |
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if (make_sure_we_have_it(commitS, sha1)) |
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return -1; |
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if (parse_commit(obj)) |
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return -1; |
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if (get_tree) { |
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if (make_sure_we_have_it(treeS, obj->tree->object.sha1)) |
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return -1; |
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if (process_tree(obj->tree->object.sha1)) |
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return -1; |
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if (!get_all) |
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get_tree = 0; |
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} |
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if (get_history) { |
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struct commit_list *parents = obj->parents; |
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for (; parents; parents = parents->next) { |
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if (has_sha1_file(parents->item->object.sha1)) |
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continue; |
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if (make_sure_we_have_it(NULL, |
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parents->item->object.sha1)) { |
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/* The server might not have it, and |
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* we don't mind. |
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*/ |
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continue; |
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} |
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if (process_commit(parents->item->object.sha1)) |
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return -1; |
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memcpy(current_commit_sha1, sha1, 20); |
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} |
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} |
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return 0; |
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} |
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int pull(char *target) |
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{ |
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int retval; |
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unsigned char sha1[20]; |
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retval = get_sha1_hex(target, sha1); |
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if (retval) |
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return retval; |
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retval = make_sure_we_have_it(commitS, sha1); |
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if (retval) |
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return retval; |
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memcpy(current_commit_sha1, sha1, 20); |
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return process_commit(sha1); |
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}
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