diff --git a/GPL-2 b/GPL-2 new file mode 100644 --- /dev/null +++ b/GPL-2 @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. (Some other Free Software Foundation software is covered by +the GNU Lesser General Public License instead.) You can apply it to +your programs, too. + + When we speak of free software, we are referring to freedom, not +price. Our General Public Licenses are designed to make sure that you +have the freedom to distribute copies of free software (and charge for +this service if you wish), that you receive source code or can get it +if you want it, that you can change the software or use pieces of it +in new free programs; and that you know you can do these things. + + To protect your rights, we need to make restrictions that forbid +anyone to deny you these rights or to ask you to surrender the rights. +These restrictions translate to certain responsibilities for you if you +distribute copies of the software, or if you modify it. + + For example, if you distribute copies of such a program, whether +gratis or for a fee, you must give the recipients all the rights that +you have. You must make sure that they, too, receive or can get the +source code. And you must show them these terms so they know their +rights. + + We protect your rights with two steps: (1) copyright the software, and +(2) offer you this license which gives you legal permission to copy, +distribute and/or modify the software. + + Also, for each author's protection and ours, we want to make certain +that everyone understands that there is no warranty for this free +software. If the software is modified by someone else and passed on, we +want its recipients to know that what they have is not the original, so +that any problems introduced by others will not reflect on the original +authors' reputations. + + Finally, any free program is threatened constantly by software +patents. We wish to avoid the danger that redistributors of a free +program will individually obtain patent licenses, in effect making the +program proprietary. To prevent this, we have made it clear that any +patent must be licensed for everyone's free use or not licensed at all. + + The precise terms and conditions for copying, distribution and +modification follow. + + GNU GENERAL PUBLIC LICENSE + TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION + + 0. This License applies to any program or other work which contains +a notice placed by the copyright holder saying it may be distributed +under the terms of this General Public License. The "Program", below, +refers to any such program or work, and a "work based on the Program" +means either the Program or any derivative work under copyright law: +that is to say, a work containing the Program or a portion of it, +either verbatim or with modifications and/or translated into another +language. (Hereinafter, translation is included without limitation in +the term "modification".) Each licensee is addressed as "you". + +Activities other than copying, distribution and modification are not +covered by this License; they are outside its scope. The act of +running the Program is not restricted, and the output from the Program +is covered only if its contents constitute a work based on the +Program (independent of having been made by running the Program). +Whether that is true depends on what the Program does. + + 1. You may copy and distribute verbatim copies of the Program's +source code as you receive it, in any medium, provided that you +conspicuously and appropriately publish on each copy an appropriate +copyright notice and disclaimer of warranty; keep intact all the +notices that refer to this License and to the absence of any warranty; +and give any other recipients of the Program a copy of this License +along with the Program. + +You may charge a fee for the physical act of transferring a copy, and +you may at your option offer warranty protection in exchange for a fee. + + 2. You may modify your copy or copies of the Program or any portion +of it, thus forming a work based on the Program, and copy and +distribute such modifications or work under the terms of Section 1 +above, provided that you also meet all of these conditions: + + a) You must cause the modified files to carry prominent notices + stating that you changed the files and the date of any change. + + b) You must cause any work that you distribute or publish, that in + whole or in part contains or is derived from the Program or any + part thereof, to be licensed as a whole at no charge to all third + parties under the terms of this License. + + c) If the modified program normally reads commands interactively + when run, you must cause it, when started running for such + interactive use in the most ordinary way, to print or display an + announcement including an appropriate copyright notice and a + notice that there is no warranty (or else, saying that you provide + a warranty) and that users may redistribute the program under + these conditions, and telling the user how to view a copy of this + License. (Exception: if the Program itself is interactive but + does not normally print such an announcement, your work based on + the Program is not required to print an announcement.) + +These requirements apply to the modified work as a whole. If +identifiable sections of that work are not derived from the Program, +and can be reasonably considered independent and separate works in +themselves, then this License, and its terms, do not apply to those +sections when you distribute them as separate works. But when you +distribute the same sections as part of a whole which is a work based +on the Program, the distribution of the whole must be on the terms of +this License, whose permissions for other licensees extend to the +entire whole, and thus to each and every part regardless of who wrote it. + +Thus, it is not the intent of this section to claim rights or contest +your rights to work written entirely by you; rather, the intent is to +exercise the right to control the distribution of derivative or +collective works based on the Program. + +In addition, mere aggregation of another work not based on the Program +with the Program (or with a work based on the Program) on a volume of +a storage or distribution medium does not bring the other work under +the scope of this License. + + 3. You may copy and distribute the Program (or a work based on it, +under Section 2) in object code or executable form under the terms of +Sections 1 and 2 above provided that you also do one of the following: + + a) Accompany it with the complete corresponding machine-readable + source code, which must be distributed under the terms of Sections + 1 and 2 above on a medium customarily used for software interchange; or, + + b) Accompany it with a written offer, valid for at least three + years, to give any third party, for a charge no more than your + cost of physically performing source distribution, a complete + machine-readable copy of the corresponding source code, to be + distributed under the terms of Sections 1 and 2 above on a medium + customarily used for software interchange; or, + + c) Accompany it with the information you received as to the offer + to distribute corresponding source code. (This alternative is + allowed only for noncommercial distribution and only if you + received the program in object code or executable form with such + an offer, in accord with Subsection b above.) + +The source code for a work means the preferred form of the work for +making modifications to it. For an executable work, complete source +code means all the source code for all modules it contains, plus any +associated interface definition files, plus the scripts used to +control compilation and installation of the executable. However, as a +special exception, the source code distributed need not include +anything that is normally distributed (in either source or binary +form) with the major components (compiler, kernel, and so on) of the +operating system on which the executable runs, unless that component +itself accompanies the executable. + +If distribution of executable or object code is made by offering +access to copy from a designated place, then offering equivalent +access to copy the source code from the same place counts as +distribution of the source code, even though third parties are not +compelled to copy the source along with the object code. + + 4. You may not copy, modify, sublicense, or distribute the Program +except as expressly provided under this License. Any attempt +otherwise to copy, modify, sublicense or distribute the Program is +void, and will automatically terminate your rights under this License. +However, parties who have received copies, or rights, from you under +this License will not have their licenses terminated so long as such +parties remain in full compliance. + + 5. You are not required to accept this License, since you have not +signed it. However, nothing else grants you permission to modify or +distribute the Program or its derivative works. These actions are +prohibited by law if you do not accept this License. Therefore, by +modifying or distributing the Program (or any work based on the +Program), you indicate your acceptance of this License to do so, and +all its terms and conditions for copying, distributing or modifying +the Program or works based on it. + + 6. Each time you redistribute the Program (or any work based on the +Program), the recipient automatically receives a license from the +original licensor to copy, distribute or modify the Program subject to +these terms and conditions. You may not impose any further +restrictions on the recipients' exercise of the rights granted herein. +You are not responsible for enforcing compliance by third parties to +this License. + + 7. If, as a consequence of a court judgment or allegation of patent +infringement or for any other reason (not limited to patent issues), +conditions are imposed on you (whether by court order, agreement or +otherwise) that contradict the conditions of this License, they do not +excuse you from the conditions of this License. If you cannot +distribute so as to satisfy simultaneously your obligations under this +License and any other pertinent obligations, then as a consequence you +may not distribute the Program at all. For example, if a patent +license would not permit royalty-free redistribution of the Program by +all those who receive copies directly or indirectly through you, then +the only way you could satisfy both it and this License would be to +refrain entirely from distribution of the Program. + +If any portion of this section is held invalid or unenforceable under +any particular circumstance, the balance of the section is intended to +apply and the section as a whole is intended to apply in other +circumstances. + +It is not the purpose of this section to induce you to infringe any +patents or other property right claims or to contest validity of any +such claims; this section has the sole purpose of protecting the +integrity of the free software distribution system, which is +implemented by public license practices. Many people have made +generous contributions to the wide range of software distributed +through that system in reliance on consistent application of that +system; it is up to the author/donor to decide if he or she is willing +to distribute software through any other system and a licensee cannot +impose that choice. + +This section is intended to make thoroughly clear what is believed to +be a consequence of the rest of this License. + + 8. If the distribution and/or use of the Program is restricted in +certain countries either by patents or by copyrighted interfaces, the +original copyright holder who places the Program under this License +may add an explicit geographical distribution limitation excluding +those countries, so that distribution is permitted only in or among +countries not thus excluded. In such case, this License incorporates +the limitation as if written in the body of this License. + + 9. The Free Software Foundation may publish revised and/or new versions +of the General Public License from time to time. Such new versions will +be similar in spirit to the present version, but may differ in detail to +address new problems or concerns. + +Each version is given a distinguishing version number. If the Program +specifies a version number of this License which applies to it and "any +later version", you have the option of following the terms and conditions +either of that version or of any later version published by the Free +Software Foundation. If the Program does not specify a version number of +this License, you may choose any version ever published by the Free Software +Foundation. + + 10. If you wish to incorporate parts of the Program into other free +programs whose distribution conditions are different, write to the author +to ask for permission. For software which is copyrighted by the Free +Software Foundation, write to the Free Software Foundation; we sometimes +make exceptions for this. Our decision will be guided by the two goals +of preserving the free status of all derivatives of our free software and +of promoting the sharing and reuse of software generally. + + NO WARRANTY + + 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY +FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN +OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES +PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED +OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF +MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS +TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE +PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, +REPAIR OR CORRECTION. + + 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR +REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, +INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING +OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED +TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY +YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER +PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE +POSSIBILITY OF SUCH DAMAGES. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. diff --git a/Git/Commit.hs b/Git/Commit.hs new file mode 100644 --- /dev/null +++ b/Git/Commit.hs @@ -0,0 +1,73 @@ +module Git.Commit ( + Commit(..), + commitParse, + commitPretty +) where + +import qualified Data.ByteString.Lazy.Char8 as C +import Data.Digest.Pure.SHA (Digest, sha1, showDigest) + +import Data.Time.Clock +import Data.Time.Format +import Data.Time.LocalTime +import System.Locale + +type Author = String + +type Date = String + +data Commit = Commit { + commitParent :: C.ByteString, --Digest, + commitAuthor :: C.ByteString, --Person, + commitAuthorDate :: C.ByteString, --Date, + commitCommitter :: C.ByteString, --Person, + commitCommitterDate :: C.ByteString, --Date, + commitMessage :: C.ByteString +} + +------------------------------------------------------------ +-- commitParse +-- + +e = C.empty + +defCommit = Commit e e e e e e + +commitParse bs = commitParseLines defCommit (C.lines bs) + +commitParseLines c [] = c + +commitParseLines c (l:ls) + | C.null l = c{commitMessage = C.unlines ls} + | otherwise = commitParseLines (commitModLine c l) ls + +commitModLine c l = commitMod c (C.unpack hd) bdy + where (hd:bdy) = C.words l + +commitMod c hd bdy + | hd == "commit" = c + | hd == "parent" = c{commitParent = head bdy} + | hd == "author" = c{commitAuthor = pName, commitAuthorDate = t} + | hd == "committer" = c{commitCommitter = pName, commitCommitterDate = t} + | otherwise = c + where + (pTZ:pTime:pAs) = reverse bdy + pName = C.unwords $ reverse pAs + t = C.unwords [pTime, pTZ] + +------------------------------------------------------------ +-- commitPretty +-- + +commitPretty (Commit p a ad c cd m) = + C.unlines [ + C.concat [(C.pack "Author: "), a], + C.concat [(C.pack "Date: "), f], + C.empty, + m + ] + where + [ps, tz] = map C.unpack $ C.words ad + s = readTime defaultTimeLocale "%s" ps + z = utcToZonedTime (read tz) s + f = C.pack $ formatTime defaultTimeLocale "%c" z diff --git a/Git/Pack.hs b/Git/Pack.hs new file mode 100644 --- /dev/null +++ b/Git/Pack.hs @@ -0,0 +1,37 @@ +module Git.Pack ( + Pack(..), + packParse, + packPretty +) where + +import qualified Data.ByteString.Lazy.Char8 as C +import qualified Data.ByteString.Lazy as L +import Data.Binary.Get +import Data.Word + +data Pack = Pack { + packVersion :: Word32, + packNumObjects :: Word32 +} + +------------------------------------------------------------ +-- packParse +-- + +packDeSerialize = do + ver <- getWord32be + n <- getWord32be + return (Pack ver n) + +packParse bs = runGet packDeSerialize bs' + where bs' = L.drop 4 bs + +------------------------------------------------------------ +-- packPretty +-- + +packPretty (Pack ver n) = + C.unlines [ + C.concat [(C.pack "Version: "), C.pack (show ver)], + C.concat [(C.pack "Num Objects: "), C.pack (show n)] + ] diff --git a/Setup.hs b/Setup.hs new file mode 100644 --- /dev/null +++ b/Setup.hs @@ -0,0 +1,5 @@ +#!/usr/bin/runhaskell + +import Distribution.Simple + +main = defaultMain diff --git a/ght.cabal b/ght.cabal new file mode 100644 --- /dev/null +++ b/ght.cabal @@ -0,0 +1,28 @@ +Name: ght +Version: 0.2.0 +License: GPL +License-file: GPL-2 +Author: Conrad Parker +Maintainer: Conrad Parker +Category: Development +Synopsis: Trivial routines for inspecting git repositories +Description: This is a bunch of trivial routines for inspecting git + repositories. It is in no way useful beyond that. +Stability: experimental +Build-Type: Simple +Cabal-Version: >= 1.2 + +------------------------------------------------------------ +library + Build-Depends: base < 5, data-default, bytestring, binary, SHA, old-locale, time + Exposed-Modules: Git.Commit + Git.Pack + +------------------------------------------------------------ +-- ght tool +-- + +Executable ght + Main-Is: ght.hs + Hs-Source-Dirs: ., tools + Build-Depends: base, data-default, transformers, ui-command, unix, directory, filepath, bytestring, zlib, SHA diff --git a/tools/ght.hs b/tools/ght.hs new file mode 100644 --- /dev/null +++ b/tools/ght.hs @@ -0,0 +1,401 @@ +module Main where + +import Control.Monad (liftM, when) +import Control.Monad.Trans (liftIO) + +import Data.Default +import Data.List (intersperse, sort) + +import UI.Command + +import Git.Commit +import Git.Pack + +-- show-prefix, show-root use these +import System.FilePath hiding (normalise) +import System.Directory +import System.Posix.Files + +-- show +import System.IO (stdout) +import Codec.Compression.Zlib +import qualified Data.ByteString.Lazy as L +import qualified Data.ByteString.Lazy.Char8 as C +import Data.Digest.Pure.SHA (sha1, showDigest) + +------------------------------------------------------------ +-- show-prefix +-- + +ghtShowPrefix :: Command () + +ghtShowPrefix = defCmd { + cmdName = "show-prefix", + cmdHandler = ghtShowPrefixHandler, + cmdCategory = "Reporting", + cmdShortDesc = "Show path from top-level directory of repo" + } + +ghtShowPrefixHandler = do + path <- liftIO findRoot + cwd <- liftIO $ getCurrentDirectory + canPath <- liftIO $ canonicalizePath path + let relPath = makeRelative canPath cwd + liftIO $ putStrLn (relPath ++ [pathSeparator]) + +------------------------------------------------------------ +-- show-root +-- + +ghtShowRoot :: Command () + +ghtShowRoot = defCmd { + cmdName = "show-root", + cmdHandler = ghtShowRootHandler, + cmdCategory = "Reporting", + cmdShortDesc = "Show path to top-level directory of repo" + } + +ghtShowRootHandler = do + path <- liftIO findRoot + liftIO $ putStrLn path + +------------------------------------------------------------ +-- findRoot +-- + +gitPath :: FilePath -> IO FilePath +gitPath f = do + root <- findRoot + return $ root ".git" f + +findRoot :: IO FilePath +findRoot = do + mp <- liftIO $ findRoot' "." + case mp of + Just path -> return (path ++ [pathSeparator]) + Nothing -> error "fatal: Not a git repository (or any of the parent directories)" + +findRoot' :: FilePath -> IO (Maybe FilePath) +findRoot' path = do + b <- fileExist path + case b of + True -> do + d <- dirIsRoot path + case d of + True -> return (Just (normalise path)) + False -> do + let newPath = ".." path + canPath <- canonicalizePath path + canNewPath <- canonicalizePath newPath + if (canPath == canNewPath) then + return Nothing + else findRoot' newPath + False -> return Nothing + +dirIsRoot path = do + let dotGit = path ".git" + liftIO $ fileExist dotGit + +------------------------------------------------------------ +-- normalise +-- + +-- NOTE: this is a modified version of normalise from filepath, +-- fixed to handle the case of a trailing dot. I sent a patch +-- with this change to ndm on 20100211; once that is upstream, +-- then this copy can be removed and the System.FilePath version +-- used instead. + +-- | Normalise a file +-- +-- * \/\/ outside of the drive can be made blank +-- +-- * \/ -> 'pathSeparator' +-- +-- * .\/ -> \"\" +-- +-- > Posix: normalise "/file/\\test////" == "/file/\\test/" +-- > Posix: normalise "/file/./test" == "/file/test" +-- > Posix: normalise "/test/file/../bob/fred/" == "/test/file/../bob/fred/" +-- > Posix: normalise "../bob/fred/" == "../bob/fred/" +-- > Posix: normalise "./bob/fred/" == "bob/fred/" +-- > Windows: normalise "c:\\file/bob\\" == "C:\\file\\bob\\" +-- > Windows: normalise "c:\\" == "C:\\" +-- > Windows: normalise "\\\\server\\test" == "\\\\server\\test" +-- > Windows: normalise "c:/file" == "C:\\file" +-- > normalise "." == "." +-- > Posix: normalise "./" == "./" + +normalise :: FilePath -> FilePath +normalise path = joinDrive (normaliseDrive drv) (f pth) + ++ [pathSeparator | not (null pth) && isPathSeparator (last pth)] + where + (drv,pth) = splitDrive path + + f = joinPath . dropDots [] . splitDirectories . propSep + + propSep (a:b:xs) + | isPathSeparator a && isPathSeparator b = propSep (a:xs) + propSep (a:xs) + | isPathSeparator a = pathSeparator : propSep xs + propSep (x:xs) = x : propSep xs + propSep [] = [] + + dropDots acc ["."] = ["."] + dropDots acc xs = dropDots' acc xs + + dropDots' acc (".":xs) = dropDots' acc xs + dropDots' acc (x:xs) = dropDots' (x:acc) xs + dropDots' acc [] = reverse acc + +--joinDrive = ++ +normaliseDrive = id + +------------------------------------------------------------ +-- branch +-- + +ghtBranch = defCmd { + cmdName = "branch", + cmdHandler = ghtBranchHandler, + cmdCategory = "Blob management", + cmdShortDesc = "show branches", + cmdExamples = [("Show branches available", "")] + } + +ghtBranchHandler = do + args <- appArgs + liftIO $ showBranches args + +showBranches _ = do + path <- gitPath $ "refs" "heads" + branches <- getDirectoryContents path + let branches' = filter (/= ".") branches + let branches'' = filter (/= "..") branches' + hd <- derefFile "HEAD" + mapM_ (showBranch hd) (sort branches'') + +showBranch hd b = do + ref <- derefFile $ "refs" "heads" b + if (ref == hd) then + putStr "* " + else putStr " " + putStrLn b + +------------------------------------------------------------ +-- findBlob +-- + +findBlob [] = findBlob ["HEAD"] + +findBlob (name:_) = do + mPath <- firstExist [name, + ("refs" name), + ("refs" "tags" name), + ("refs" "heads" name), + ("refs" "remotes" name), + ("refs" "remotes" name "HEAD")] + case mPath of + Just path -> do + bs <- derefFile path + return [C.unpack bs] + Nothing -> return [name] + +firstExist :: [FilePath] -> IO (Maybe FilePath) +firstExist [] = return Nothing +firstExist (f:fs) = do + p <- gitPath f + b <- fileExist p + if b then return (Just f) else firstExist fs + +------------------------------------------------------------ +-- log +-- + +ghtLog = defCmd { + cmdName = "log", + cmdHandler = ghtLogHandler, + cmdCategory = "Blob management", + cmdShortDesc = "Show commit logs", + cmdExamples = [("Show log of current branch", ""), ("Show log of branch feature1", "feature1")] + } + +ghtLogHandler = do + args <- appArgs + b <- liftIO $ findBlob args + liftIO $ showLog b + +showLog (blob:_) + | blob == "" = return () + | otherwise = do + d <- readBlob blob + let m'pb = prettyLog blob d + case m'pb of + Just c -> do + let p = C.concat [commitHeader, C.pack (blob ++ "\n"), commitPretty c] + L.hPut stdout p + showLog [C.unpack $ commitParent c] + Nothing -> return () + where + commitHeader = C.pack "commit " + +prettyLog blob bs + | commitHeader `L.isPrefixOf` bs = Just c + | otherwise = Nothing + where + commitHeader = C.pack "commit " + c = commitParse bs + +------------------------------------------------------------ +-- show-pack +-- + +ghtShowPack = defCmd { + cmdName = "show-pack", + cmdHandler = ghtShowPackHandler, + cmdCategory = "Blob management", + cmdShortDesc = "Show the raw dump of a pack", + cmdExamples = [("Show raw contents of pack pack-abcd.pack", "abcd")] + } + +ghtShowPackHandler = do + args <- appArgs + b <- liftIO $ findPack args + -- liftIO $ L.hPut stdout b + let p = prettyPack b + liftIO $ L.hPut stdout p + +findPack (pack:_) = do + path <- gitPath ("objects" "pack" ("pack-" ++ pack ++ ".pack")) + b <- L.readFile path + return b + +prettyPack bs + | packHeader `L.isPrefixOf` bs = packPretty $ packParse bs + | otherwise = error "Not a pack" + where + packHeader = C.pack "PACK" + +------------------------------------------------------------ +-- show-raw +-- + +ghtShowRaw = defCmd { + cmdName = "show-raw", + cmdHandler = ghtShowRawHandler, + cmdCategory = "Blob management", + cmdShortDesc = "Show the raw dump of an object", + cmdExamples = [("Show raw contents of blob deadbeef", "deadbeef"), ("Show raw contents of branch feature1", "feature1")] + } + +ghtShowRawHandler = do + args <- appArgs + b <- liftIO $ findBlob args + liftIO $ showRawBlob b + +showRawBlob (blob:_) = do + d <- readBlob blob + L.hPut stdout d + +------------------------------------------------------------ +-- show +-- + +ghtShow = defCmd { + cmdName = "show", + cmdHandler = ghtShowHandler, + cmdCategory = "Blob management", + cmdShortDesc = "Show an object", + cmdExamples = [("Show contents of blob deadbeef", "deadbeef"), ("Show contents of branch feature1", "feature1")] + } + +ghtShowHandler = do + args <- appArgs + b <- liftIO $ findBlob args + liftIO $ showBlob b + +readBlob blob = do + let (bH,bT) = splitAt 2 blob + path <- gitPath ("objects" bH bT) + b <- L.readFile path + return (decompress b) + +showBlob (blob:_) = do + d <- readBlob blob + let pb = prettyBlob blob d + L.hPut stdout pb + +prettyBlob blob bs + | commitHeader `L.isPrefixOf` bs = C.concat [commitHeader, C.pack (blob ++ "\n"), commitPretty $ commitParse bs] + | otherwise = chomp bs + where + commitHeader = C.pack "commit " + +derefFile f = do + path <- gitPath f + bs <- L.readFile path + deref bs + +deref bs + | refHeader `L.isPrefixOf` bs = derefFile refPath + | otherwise = return (chomp bs) + where + refHeader = C.pack "ref: " + refPath = C.unpack (chomp $ L.drop 5 bs) + +chomp = C.takeWhile (/= '\n') + +------------------------------------------------------------ +-- hash-object +-- + +ghtHashObject = defCmd { + cmdName = "hash-object", + cmdHandler = ghtHashObjectHandler, + cmdCategory = "Blob management", + cmdShortDesc = "Compute object ID from a file", + cmdExamples = [("Compute the object ID of file.c", "file.c")] + } + +ghtHashObjectHandler = do + args <- appArgs + liftIO $ hashFile args + +hashFile [] = return () + +hashFile (path:_) = do + b <- L.readFile path + status <- getFileStatus path + let h = C.pack $ "blob " ++ (show $ fileSize status) + let t = h `L.append` (L.singleton 0x0) `L.append` b + putStrLn $ showHash t + +showHash = showDigest . sha1 + +------------------------------------------------------------ +-- The Application +-- + +ght :: Application () () +ght = def { + appName = "ght", + appVersion = "0.1", + appAuthors = ["Conrad Parker"], + appBugEmail = "conrad@metadecks.org", + appShortDesc = "Trivial git inspection tools", + appLongDesc = longDesc, + appCategories = ["Reporting", "Blob management"], + appSeeAlso = ["git"], + appProject = "Ght", + appCmds = [ghtShowPrefix, ghtShowRoot, ghtShow, ghtLog, ghtShowRaw, ghtShowPack, ghtHashObject, ghtBranch] + } + +longDesc = "This is a bunch of trivial routines for inspecting git repositories. It is in no way useful beyond that." + +------------------------------------------------------------ +-- Main +-- + +main :: IO () +main = appMain ght