git svn: info: correctly handle absolute path args

Calling "git svn info $(pwd)" would hit:
  "Reading from filehandle failed at ..."
errors due to improper prefixing and canonicalization.

Strip the toplevel path from absolute filesystem paths to ensure
downstream canonicalization routines are only exposed to paths
tracked in git (or SVN).

v2:
  Thanks to Andrej Manduch for originally noticing the issue
  and fixing my original version of this to handle
  more corner cases such as "/path/to/top/../top" and
  "/path/to/top/../top/file" as shown in the new test cases.

v3:
  Fix pathname portability problems pointed out by Johannes Sixt
  with a hint from brian m. carlson.

Cc: Johannes Sixt <j6t@kdbg.org>
Cc: "brian m. carlson" <sandals@crustytoothpaste.net>
Signed-off-by: Andrej Manduch <amanduch@gmail.com>
Signed-off-by: Eric Wong <normalperson@yhbt.net>
2 files changed
tree: 50f8746f5a2e34f974912561089b9026e6705c62
  1. block-sha1/
  2. builtin/
  3. compat/
  4. contrib/
  5. Documentation/
  6. ewah/
  7. git-gui/
  8. gitk-git/
  9. gitweb/
  10. mergetools/
  11. perl/
  12. po/
  13. ppc/
  14. t/
  15. templates/
  16. vcs-svn/
  17. xdiff/
  18. .gitattributes
  19. .gitignore
  20. .mailmap
  21. abspath.c
  22. aclocal.m4
  23. advice.c
  24. advice.h
  25. alias.c
  26. alloc.c
  27. archive-tar.c
  28. archive-zip.c
  29. archive.c
  30. archive.h
  31. argv-array.c
  32. argv-array.h
  33. attr.c
  34. attr.h
  35. base85.c
  36. bisect.c
  37. bisect.h
  38. blob.c
  39. blob.h
  40. branch.c
  41. branch.h
  42. builtin.h
  43. bulk-checkin.c
  44. bulk-checkin.h
  45. bundle.c
  46. bundle.h
  47. cache-tree.c
  48. cache-tree.h
  49. cache.h
  50. check-builtins.sh
  51. check-racy.c
  52. check_bindir
  53. color.c
  54. color.h
  55. column.c
  56. column.h
  57. combine-diff.c
  58. command-list.txt
  59. commit-slab.h
  60. commit.c
  61. commit.h
  62. config.c
  63. config.mak.in
  64. config.mak.uname
  65. configure.ac
  66. connect.c
  67. connect.h
  68. connected.c
  69. connected.h
  70. convert.c
  71. convert.h
  72. copy.c
  73. COPYING
  74. credential-cache--daemon.c
  75. credential-cache.c
  76. credential-store.c
  77. credential.c
  78. credential.h
  79. csum-file.c
  80. csum-file.h
  81. ctype.c
  82. daemon.c
  83. date.c
  84. decorate.c
  85. decorate.h
  86. delta.h
  87. diff-delta.c
  88. diff-lib.c
  89. diff-no-index.c
  90. diff.c
  91. diff.h
  92. diffcore-break.c
  93. diffcore-delta.c
  94. diffcore-order.c
  95. diffcore-pickaxe.c
  96. diffcore-rename.c
  97. diffcore.h
  98. dir.c
  99. dir.h
  100. editor.c
  101. entry.c
  102. environment.c
  103. exec_cmd.c
  104. exec_cmd.h
  105. fast-import.c
  106. fetch-pack.c
  107. fetch-pack.h
  108. fmt-merge-msg.h
  109. fsck.c
  110. fsck.h
  111. generate-cmdlist.sh
  112. gettext.c
  113. gettext.h
  114. git-add--interactive.perl
  115. git-am.sh
  116. git-archimport.perl
  117. git-bisect.sh
  118. git-compat-util.h
  119. git-cvsexportcommit.perl
  120. git-cvsimport.perl
  121. git-cvsserver.perl
  122. git-difftool--helper.sh
  123. git-difftool.perl
  124. git-filter-branch.sh
  125. git-instaweb.sh
  126. git-merge-octopus.sh
  127. git-merge-one-file.sh
  128. git-merge-resolve.sh
  129. git-mergetool--lib.sh
  130. git-mergetool.sh
  131. git-p4.py
  132. git-parse-remote.sh
  133. git-pull.sh
  134. git-quiltimport.sh
  135. git-rebase--am.sh
  136. git-rebase--interactive.sh
  137. git-rebase--merge.sh
  138. git-rebase.sh
  139. git-relink.perl
  140. git-remote-testgit.sh
  141. git-request-pull.sh
  142. git-send-email.perl
  143. git-sh-i18n.sh
  144. git-sh-setup.sh
  145. git-stash.sh
  146. git-submodule.sh
  147. git-svn.perl
  148. GIT-VERSION-GEN
  149. git-web--browse.sh
  150. git.c
  151. git.rc
  152. git.spec.in
  153. gpg-interface.c
  154. gpg-interface.h
  155. graph.c
  156. graph.h
  157. grep.c
  158. grep.h
  159. hashmap.c
  160. hashmap.h
  161. help.c
  162. help.h
  163. hex.c
  164. http-backend.c
  165. http-fetch.c
  166. http-push.c
  167. http-walker.c
  168. http.c
  169. http.h
  170. ident.c
  171. imap-send.c
  172. INSTALL
  173. khash.h
  174. kwset.c
  175. kwset.h
  176. levenshtein.c
  177. levenshtein.h
  178. LGPL-2.1
  179. line-log.c
  180. line-log.h
  181. line-range.c
  182. line-range.h
  183. list-objects.c
  184. list-objects.h
  185. ll-merge.c
  186. ll-merge.h
  187. lockfile.c
  188. log-tree.c
  189. log-tree.h
  190. mailmap.c
  191. mailmap.h
  192. Makefile
  193. match-trees.c
  194. merge-blobs.c
  195. merge-blobs.h
  196. merge-recursive.c
  197. merge-recursive.h
  198. merge.c
  199. mergesort.c
  200. mergesort.h
  201. name-hash.c
  202. notes-cache.c
  203. notes-cache.h
  204. notes-merge.c
  205. notes-merge.h
  206. notes-utils.c
  207. notes-utils.h
  208. notes.c
  209. notes.h
  210. object.c
  211. object.h
  212. pack-bitmap-write.c
  213. pack-bitmap.c
  214. pack-bitmap.h
  215. pack-check.c
  216. pack-objects.c
  217. pack-objects.h
  218. pack-revindex.c
  219. pack-revindex.h
  220. pack-write.c
  221. pack.h
  222. pager.c
  223. parse-options-cb.c
  224. parse-options.c
  225. parse-options.h
  226. patch-delta.c
  227. patch-ids.c
  228. patch-ids.h
  229. path.c
  230. pathspec.c
  231. pathspec.h
  232. pkt-line.c
  233. pkt-line.h
  234. preload-index.c
  235. pretty.c
  236. prio-queue.c
  237. prio-queue.h
  238. progress.c
  239. progress.h
  240. prompt.c
  241. prompt.h
  242. quote.c
  243. quote.h
  244. reachable.c
  245. reachable.h
  246. read-cache.c
  247. README
  248. reflog-walk.c
  249. reflog-walk.h
  250. refs.c
  251. refs.h
  252. remote-curl.c
  253. remote-testsvn.c
  254. remote.c
  255. remote.h
  256. replace_object.c
  257. rerere.c
  258. rerere.h
  259. resolve-undo.c
  260. resolve-undo.h
  261. revision.c
  262. revision.h
  263. run-command.c
  264. run-command.h
  265. send-pack.c
  266. send-pack.h
  267. sequencer.c
  268. sequencer.h
  269. server-info.c
  270. setup.c
  271. sh-i18n--envsubst.c
  272. sha1-array.c
  273. sha1-array.h
  274. sha1-lookup.c
  275. sha1-lookup.h
  276. sha1_file.c
  277. sha1_name.c
  278. shallow.c
  279. shell.c
  280. shortlog.h
  281. show-index.c
  282. sideband.c
  283. sideband.h
  284. sigchain.c
  285. sigchain.h
  286. split-index.c
  287. split-index.h
  288. strbuf.c
  289. strbuf.h
  290. streaming.c
  291. streaming.h
  292. string-list.c
  293. string-list.h
  294. submodule.c
  295. submodule.h
  296. symlinks.c
  297. tag.c
  298. tag.h
  299. tar.h
  300. test-chmtime.c
  301. test-config.c
  302. test-ctype.c
  303. test-date.c
  304. test-delta.c
  305. test-dump-cache-tree.c
  306. test-dump-split-index.c
  307. test-genrandom.c
  308. test-hashmap.c
  309. test-index-version.c
  310. test-line-buffer.c
  311. test-match-trees.c
  312. test-mergesort.c
  313. test-mktemp.c
  314. test-parse-options.c
  315. test-path-utils.c
  316. test-prio-queue.c
  317. test-read-cache.c
  318. test-regex.c
  319. test-revision-walking.c
  320. test-run-command.c
  321. test-scrap-cache-tree.c
  322. test-sha1.c
  323. test-sha1.sh
  324. test-sigchain.c
  325. test-string-list.c
  326. test-subprocess.c
  327. test-svn-fe.c
  328. test-urlmatch-normalization.c
  329. test-wildmatch.c
  330. thread-utils.c
  331. thread-utils.h
  332. trace.c
  333. trace.h
  334. transport-helper.c
  335. transport.c
  336. transport.h
  337. tree-diff.c
  338. tree-walk.c
  339. tree-walk.h
  340. tree.c
  341. tree.h
  342. unicode_width.h
  343. unimplemented.sh
  344. unix-socket.c
  345. unix-socket.h
  346. unpack-trees.c
  347. unpack-trees.h
  348. update_unicode.sh
  349. upload-pack.c
  350. url.c
  351. url.h
  352. urlmatch.c
  353. urlmatch.h
  354. usage.c
  355. userdiff.c
  356. userdiff.h
  357. utf8.c
  358. utf8.h
  359. varint.c
  360. varint.h
  361. version.c
  362. version.h
  363. versioncmp.c
  364. walker.c
  365. walker.h
  366. wildmatch.c
  367. wildmatch.h
  368. wrap-for-bin.sh
  369. wrapper.c
  370. write_or_die.c
  371. ws.c
  372. wt-status.c
  373. wt-status.h
  374. xdiff-interface.c
  375. xdiff-interface.h
  376. zlib.c