Eliminate confusing "won't bisect on seeked tree" failure

This error message is very confusing---it doesn't tell the user
anything about how to fix the situation. And the actual fix
for the situation ("git bisect reset") does a checkout of a
potentially random branch, (compared to what the user wants to
be on for the bisect she is starting).

The simplest way to eliminate the confusion is to just make
"git bisect start" do the cleanup itself. There's no significant
loss of safety here since we already have a general safety in
the form of the reflog.

Note: We preserve the warning for any cogito users. We do this
by switching from .git/head-name to .git/BISECT_START for the
extra state, (which is a more descriptive name anyway).

Signed-off-by: Carl Worth <cworth@cworth.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2 files changed
tree: 0ecf5e9861cd7164a86a418cfd7fb804fc059ed3
  1. arm/
  2. compat/
  3. contrib/
  4. Documentation/
  5. git-gui/
  6. gitk-git/
  7. gitweb/
  8. mozilla-sha1/
  9. perl/
  10. ppc/
  11. t/
  12. templates/
  13. xdiff/
  14. .gitignore
  15. .mailmap
  16. alloc.c
  17. archive-tar.c
  18. archive-zip.c
  19. archive.c
  20. archive.h
  21. attr.c
  22. attr.h
  23. base85.c
  24. blob.c
  25. blob.h
  26. builtin-add.c
  27. builtin-annotate.c
  28. builtin-apply.c
  29. builtin-archive.c
  30. builtin-blame.c
  31. builtin-branch.c
  32. builtin-bundle.c
  33. builtin-cat-file.c
  34. builtin-check-attr.c
  35. builtin-check-ref-format.c
  36. builtin-checkout-index.c
  37. builtin-clean.c
  38. builtin-commit-tree.c
  39. builtin-commit.c
  40. builtin-config.c
  41. builtin-count-objects.c
  42. builtin-describe.c
  43. builtin-diff-files.c
  44. builtin-diff-index.c
  45. builtin-diff-tree.c
  46. builtin-diff.c
  47. builtin-fast-export.c
  48. builtin-fetch--tool.c
  49. builtin-fetch-pack.c
  50. builtin-fetch.c
  51. builtin-fmt-merge-msg.c
  52. builtin-for-each-ref.c
  53. builtin-fsck.c
  54. builtin-gc.c
  55. builtin-grep.c
  56. builtin-http-fetch.c
  57. builtin-init-db.c
  58. builtin-log.c
  59. builtin-ls-files.c
  60. builtin-ls-remote.c
  61. builtin-ls-tree.c
  62. builtin-mailinfo.c
  63. builtin-mailsplit.c
  64. builtin-merge-base.c
  65. builtin-merge-file.c
  66. builtin-merge-ours.c
  67. builtin-mv.c
  68. builtin-name-rev.c
  69. builtin-pack-objects.c
  70. builtin-pack-refs.c
  71. builtin-prune-packed.c
  72. builtin-prune.c
  73. builtin-push.c
  74. builtin-read-tree.c
  75. builtin-reflog.c
  76. builtin-rerere.c
  77. builtin-reset.c
  78. builtin-rev-list.c
  79. builtin-rev-parse.c
  80. builtin-revert.c
  81. builtin-rm.c
  82. builtin-send-pack.c
  83. builtin-shortlog.c
  84. builtin-show-branch.c
  85. builtin-show-ref.c
  86. builtin-stripspace.c
  87. builtin-symbolic-ref.c
  88. builtin-tag.c
  89. builtin-tar-tree.c
  90. builtin-unpack-objects.c
  91. builtin-update-index.c
  92. builtin-update-ref.c
  93. builtin-upload-archive.c
  94. builtin-verify-pack.c
  95. builtin-verify-tag.c
  96. builtin-write-tree.c
  97. builtin.h
  98. bundle.c
  99. bundle.h
  100. cache-tree.c
  101. cache-tree.h
  102. cache.h
  103. check-builtins.sh
  104. check-racy.c
  105. color.c
  106. color.h
  107. combine-diff.c
  108. command-list.txt
  109. commit.c
  110. commit.h
  111. config.c
  112. config.mak.in
  113. configure.ac
  114. connect.c
  115. convert.c
  116. copy.c
  117. COPYING
  118. csum-file.c
  119. csum-file.h
  120. ctype.c
  121. daemon.c
  122. date.c
  123. decorate.c
  124. decorate.h
  125. delta.h
  126. diff-delta.c
  127. diff-lib.c
  128. diff.c
  129. diff.h
  130. diffcore-break.c
  131. diffcore-delta.c
  132. diffcore-order.c
  133. diffcore-pickaxe.c
  134. diffcore-rename.c
  135. diffcore.h
  136. dir.c
  137. dir.h
  138. dump-cache-tree.c
  139. entry.c
  140. environment.c
  141. exec_cmd.c
  142. exec_cmd.h
  143. fast-import.c
  144. fetch-pack.h
  145. fixup-builtins
  146. generate-cmdlist.sh
  147. git-add--interactive.perl
  148. git-am.sh
  149. git-archimport.perl
  150. git-bisect.sh
  151. git-checkout.sh
  152. git-clone.sh
  153. git-compat-util.h
  154. git-cvsexportcommit.perl
  155. git-cvsimport.perl
  156. git-cvsserver.perl
  157. git-filter-branch.sh
  158. git-help--browse.sh
  159. git-instaweb.sh
  160. git-lost-found.sh
  161. git-merge-octopus.sh
  162. git-merge-one-file.sh
  163. git-merge-resolve.sh
  164. git-merge-stupid.sh
  165. git-merge.sh
  166. git-mergetool.sh
  167. git-parse-remote.sh
  168. git-pull.sh
  169. git-quiltimport.sh
  170. git-rebase--interactive.sh
  171. git-rebase.sh
  172. git-relink.perl
  173. git-remote.perl
  174. git-repack.sh
  175. git-request-pull.sh
  176. git-send-email.perl
  177. git-sh-setup.sh
  178. git-stash.sh
  179. git-submodule.sh
  180. git-svn.perl
  181. GIT-VERSION-GEN
  182. git.c
  183. git.spec.in
  184. grep.c
  185. grep.h
  186. hash-object.c
  187. hash.c
  188. hash.h
  189. help.c
  190. http-push.c
  191. http-walker.c
  192. http.c
  193. http.h
  194. ident.c
  195. imap-send.c
  196. index-pack.c
  197. INSTALL
  198. interpolate.c
  199. interpolate.h
  200. list-objects.c
  201. list-objects.h
  202. lockfile.c
  203. log-tree.c
  204. log-tree.h
  205. mailmap.c
  206. mailmap.h
  207. Makefile
  208. match-trees.c
  209. merge-file.c
  210. merge-index.c
  211. merge-recursive.c
  212. merge-tree.c
  213. mktag.c
  214. mktree.c
  215. object-refs.c
  216. object.c
  217. object.h
  218. pack-check.c
  219. pack-redundant.c
  220. pack-write.c
  221. pack.h
  222. pager.c
  223. parse-options.c
  224. parse-options.h
  225. patch-delta.c
  226. patch-id.c
  227. patch-ids.c
  228. patch-ids.h
  229. path-list.c
  230. path-list.h
  231. path.c
  232. pkt-line.c
  233. pkt-line.h
  234. pretty.c
  235. progress.c
  236. progress.h
  237. quote.c
  238. quote.h
  239. reachable.c
  240. reachable.h
  241. read-cache.c
  242. README
  243. receive-pack.c
  244. reflog-walk.c
  245. reflog-walk.h
  246. refs.c
  247. refs.h
  248. remote.c
  249. remote.h
  250. revision.c
  251. revision.h
  252. run-command.c
  253. run-command.h
  254. send-pack.h
  255. server-info.c
  256. setup.c
  257. sha1_file.c
  258. sha1_name.c
  259. shallow.c
  260. shell.c
  261. show-index.c
  262. sideband.c
  263. sideband.h
  264. strbuf.c
  265. strbuf.h
  266. symlinks.c
  267. tag.c
  268. tag.h
  269. tar.h
  270. test-absolute-path.c
  271. test-chmtime.c
  272. test-date.c
  273. test-delta.c
  274. test-genrandom.c
  275. test-match-trees.c
  276. test-parse-options.c
  277. test-sha1.c
  278. test-sha1.sh
  279. trace.c
  280. transport.c
  281. transport.h
  282. tree-diff.c
  283. tree-walk.c
  284. tree-walk.h
  285. tree.c
  286. tree.h
  287. unpack-file.c
  288. unpack-trees.c
  289. unpack-trees.h
  290. update-server-info.c
  291. upload-pack.c
  292. usage.c
  293. utf8.c
  294. utf8.h
  295. var.c
  296. walker.c
  297. walker.h
  298. write_or_die.c
  299. ws.c
  300. wt-status.c
  301. wt-status.h
  302. xdiff-interface.c
  303. xdiff-interface.h