├── LICENSE ├── README.md └── git-reblame /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. By contrast, 15 | the GNU General Public License is intended to guarantee your freedom to 16 | share and change all versions of a program--to make sure it remains free 17 | software for all its users. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # git-reblame 2 | Repeatedly calls git-blame to see full history of whatever you ask of git-blame 3 | 4 | # Quick example 5 | 6 | Using the gnupg repo for this example, here is a normal git-blame call: 7 | 8 | ``` 9 | $ git blame -sL '/^iobuf_writestr\b/,/^}/' iobuf.c 10 | 9ca4830a5b 2206) iobuf_writestr (iobuf_t a, const char *buf) 11 | 9ca4830a5b 2207) { 12 | f2d75ac7dc 2208) if (a->use == IOBUF_INPUT || a->use == IOBUF_INPUT_TEMP) 13 | c5da750cf3 2209) { 14 | c5da750cf3 2210) log_bug ("iobuf_writestr called on an input pipeline!\n"); 15 | c5da750cf3 2211) return -1; 16 | c5da750cf3 2212) } 17 | c5da750cf3 2213) 18 | a6d4bca3b5 2214) return iobuf_write (a, buf, strlen (buf)); 19 | 9ca4830a5b 2215) } 20 | ``` 21 | 22 | And here is that same call, but using git-**re**blame: 23 | 24 | ``` 25 | $ git reblame -sL '/^iobuf_writestr\b/,/^}/' iobuf.c 26 | from commit: HEAD 27 | 28 | 9ca4830a5b 2206) iobuf_writestr (iobuf_t a, const char *buf) 29 | 9ca4830a5b 2207) { 30 | f2d75ac7dc 2208) if (a->use == IOBUF_INPUT || a->use == IOBUF_INPUT_TEMP) 31 | c5da750cf3 2209) { 32 | c5da750cf3 2210) log_bug ("iobuf_writestr called on an input pipeline!\n"); 33 | c5da750cf3 2211) return -1; 34 | c5da750cf3 2212) } 35 | c5da750cf3 2213) 36 | a6d4bca3b5 2214) return iobuf_write (a, buf, strlen (buf)); 37 | 9ca4830a5b 2215) } 38 | 39 | from commit: f2d75ac7d~ 40 | 41 | 9ca4830a5b 2153) iobuf_writestr (iobuf_t a, const char *buf) 42 | 9ca4830a5b 2154) { 43 | c5da750cf3 2155) if (a->use == IOBUF_INPUT) 44 | c5da750cf3 2156) { 45 | c5da750cf3 2157) log_bug ("iobuf_writestr called on an input pipeline!\n"); 46 | c5da750cf3 2158) return -1; 47 | c5da750cf3 2159) } 48 | c5da750cf3 2160) 49 | a6d4bca3b5 2161) return iobuf_write (a, buf, strlen (buf)); 50 | 9ca4830a5b 2162) } 51 | 52 | from commit: c5da750cf~ 53 | 54 | 9ca4830a5b 2109) iobuf_writestr (iobuf_t a, const char *buf) 55 | 9ca4830a5b 2110) { 56 | a6d4bca3b5 2111) return iobuf_write (a, buf, strlen (buf)); 57 | 9ca4830a5b 2112) } 58 | 59 | from commit: a6d4bca3b~ 60 | 61 | 9ca4830a5b 2109) iobuf_writestr (iobuf_t a, const char *buf) 62 | 9ca4830a5b 2110) { 63 | 9ca4830a5b 2111) int rc; 64 | 9ca4830a5b 2112) 65 | 9ca4830a5b 2113) for (; *buf; buf++) 66 | 9ca4830a5b 2114) if ((rc=iobuf_writebyte (a, *buf))) 67 | 9ca4830a5b 2115) return rc; 68 | 9ca4830a5b 2116) return 0; 69 | 9ca4830a5b 2117) } 70 | 71 | ``` 72 | 73 | It doesn't just work from `HEAD`, you can pass it commit references just like how you'd do with git-blame: 74 | 75 | ``` 76 | $ git reblame -sL '/^iobuf_writestr\b/,/^}/' c5da750cf~2 -- iobuf.c 77 | from commit: c5da750cf~2 78 | 79 | 9ca4830a5b 2109) iobuf_writestr (iobuf_t a, const char *buf) 80 | 9ca4830a5b 2110) { 81 | a6d4bca3b5 2111) return iobuf_write (a, buf, strlen (buf)); 82 | 9ca4830a5b 2112) } 83 | 84 | from commit: a6d4bca3b~ 85 | 86 | 9ca4830a5b 2109) iobuf_writestr (iobuf_t a, const char *buf) 87 | 9ca4830a5b 2110) { 88 | 9ca4830a5b 2111) int rc; 89 | 9ca4830a5b 2112) 90 | 9ca4830a5b 2113) for (; *buf; buf++) 91 | 9ca4830a5b 2114) if ((rc=iobuf_writebyte (a, *buf))) 92 | 9ca4830a5b 2115) return rc; 93 | 9ca4830a5b 2116) return 0; 94 | 9ca4830a5b 2117) } 95 | 96 | ``` 97 | 98 | It provides full transparency of git-blame options, with the exception of `--help`, which it overrides. 99 | 100 | # Installation 101 | 102 | Just put it somewhere in your `$PATH`. 103 | 104 | Happy coding. 105 | -------------------------------------------------------------------------------- /git-reblame: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | 3 | # Repeatedly calls git-blame to see full history of whatever you ask of git-blame 4 | # Copyright (C) 2019 Jorge Luis Martinez Gomez 5 | # 6 | # This program is free software: you can redistribute it and/or modify 7 | # it under the terms of the GNU General Public License as published by 8 | # the Free Software Foundation, either version 3 of the License, or 9 | # (at your option) any later version. 10 | # 11 | # This program is distributed in the hope that it will be useful, 12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of 13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 | # GNU General Public License for more details. 15 | # 16 | # You should have received a copy of the GNU General Public License 17 | # along with this program. If not, see . 18 | 19 | set -e 20 | 21 | version=1.0.1 22 | args_for_blame=() 23 | add_spaces=1 24 | add_headers=1 25 | 26 | usage() { 27 | cat < ...} 29 | 30 | description: 31 | Repeatedly calls git-blame with whatever options you provide, with 32 | exception of --help and --version. Each time, the commit (optionally) 33 | passed to git-blame will be replaced with the latest one from the output 34 | of the previous invocation. This goes on until git-blame fails. The point 35 | is to see the complete history of whatever you ask of git-blame. 36 | 37 | By default, the output of each git-blame invocation is prefixed with 38 | spacing and a header line saying "from commit: ". The spacing and 39 | headers can be disabled with --no-spaces and --no-headers, repectively. 40 | That might be useful if you want to process the output in a script, for 41 | example, to print the names of every author involved in the writing of a 42 | function. 43 | 44 | option descriptions: 45 | -h, --help 46 | Show this help. 47 | 48 | -v, --version 49 | Show the version of this script. 50 | 51 | --diagnostics 52 | I guess I could have also called it "verbosity", but it's meant for 53 | debugging of the script. Maybe this should be for internal use only... 54 | 55 | --no-headers 56 | Disable the headers and the blank line printed after each one. This 57 | might be useful when processing the output with another program. 58 | 59 | --no-spaces 60 | Disable the blank lines used to separate the output of each invocation 61 | and the headers. This might be useful when processing the output with 62 | another program. 63 | EOF 64 | } 65 | 66 | info() { 67 | if [[ $diagnostics ]]; then 68 | printf "$@" | awk 1 >&2 69 | fi 70 | } 71 | 72 | # We want to transparently passthrough the options of git-blame. Because we 73 | # need to change the commit refered to in the command line, we need to find 74 | # where in the options they put the commit, if they did at all. The 75 | # possible argument configurations are: 76 | # 77 | # git blame [options] $file 78 | # git blame [options] $commit $file 79 | # git blame [options] $commit -- $file 80 | 81 | i=0 82 | while (( $# )); do 83 | case "$1" in 84 | --) 85 | args_for_blame+=("$1") 86 | reached_end_of_options=1 87 | if [[ "$may_be_commit" ]]; then 88 | # git blame [options] $commit_or_file ... 89 | # 90 | # turns into 91 | # 92 | # git blame [options] $commit -- $file 93 | from_commit="$may_be_commit" 94 | from_commit_position="$may_be_commit_position" 95 | info "found from_commit_position to be %s when checking %s at\n" "$from_commit_position" "$1" "$i" 96 | elif [[ ! "$from_commit" ]]; then 97 | # git blame [options] -- $file 98 | # 99 | # We'll have to insert the commit, since there's no place for it yet. 100 | insert_commit=1 101 | from_commit_position="$i" 102 | info "found from_commit_position to be %s when checking %s\n" "$i" "$1" 103 | fi 104 | ;; 105 | 106 | # NOTE: When adding options specific to this script, they should go 107 | # here, in between `--` and `-*`. Remember to subtract from $i as 108 | # that's supposed to be tracking the placement in $args_for_blame. 109 | # Also, remember that you might want to add them to $next_args so they 110 | # passthrough to the next invocation. 111 | 112 | # This is for *INTERNAL USE ONLY*. It's so we know we're in a recursive 113 | # call and so some useful output has been given to the user. We'll use 114 | # this to know if we should suppress git-blame errors. 115 | --called-by-ourselves) 116 | called_by_ourselves=1 117 | (( i-- )) || true 118 | ;; 119 | 120 | --diagnostics) 121 | diagnostics=1 122 | (( i-- )) || true 123 | ;; 124 | 125 | # Option names are based on what's default, but I don't want double 126 | # negatives in my conditions, so that's why the discrepancy in names. 127 | 128 | --no-spaces) 129 | add_spaces= 130 | (( i-- )) || true 131 | ;; 132 | 133 | --no-headers) 134 | add_headers= 135 | (( i-- )) || true 136 | ;; 137 | 138 | --help) 139 | usage 140 | exit 141 | (( i-- )) || true # Why? Because I like consistency. 142 | ;; 143 | 144 | --version) 145 | printf "%s\n" "$version" 146 | exit 147 | (( i-- )) || true # I really do. 148 | ;; 149 | 150 | -*) 151 | args_for_blame+=("$1") 152 | # Take the options from the manpage and generate regex patterns to 153 | # check for them. 154 | blame_option_patterns="$(man git-blame | sed -nr ' 155 | /^OPTIONS/,/^\S/ { 156 | /^ {7}-/ { 157 | s/^\s*// 158 | s/\[/(/g 159 | s/\]/)?/g 160 | s/\./\\./g 161 | s/<[^>]*>/.*/g 162 | s/, /\n/g 163 | p 164 | } 165 | } 166 | ')" 167 | # If option necessitates arg. 168 | option="$1" 169 | if [[ $option != --* ]]; then 170 | option="-$(grep -o '.$' <<< "$option")" 171 | fi 172 | if grep -Fxqf <(sed -n '/ .*/{s///;p}' <<< "$blame_option_patterns") <<< "$option"; then 173 | args_for_blame+=("$2") 174 | (( i++ )) || true 175 | shift 176 | fi 177 | ;; 178 | 179 | *) 180 | args_for_blame+=("$1") 181 | if [[ ! $reached_end_of_options ]]; then 182 | # git blame [options] $commit_or_file ... 183 | # 184 | # We don't know if a "--" follows yet, so this might ambiguously be 185 | # either a file or a commit. In case it's ambiguous, we'll say we 186 | # *may* have the commit and position. 187 | if git ls-files | grep -Fxq "$1"; then 188 | may_be_commit="$1" 189 | may_be_commit_position="$i" 190 | else 191 | from_commit="$1" 192 | info "found from_commit_position to be %s when checking %s\n" "$i" "$1" 193 | from_commit_position="$i" 194 | fi 195 | fi 196 | ;; 197 | esac 198 | (( i++ )) || true 199 | shift 200 | done 201 | 202 | # git blame [options] $file 203 | # 204 | # The last case left. We'll need to insert before $file, so record the 205 | # position as that of $file (one before the end). 206 | if [[ ! "$from_commit_position" ]]; then 207 | from_commit_position="$(( i - 1 ))" 208 | info "found from_commit_position to be %s when checking %s\n" "$from_commit_position" "$1" 209 | insert_commit=1 210 | fi 211 | 212 | if [[ $add_headers ]]; then 213 | info "adding headers" 214 | # We might find out this commit doesn't include what we're searching for. 215 | # In other words, we might exit right after, so hold off on outputting 216 | # this until git-blame exits successfully. 217 | if [[ ! $from_commit ]]; then 218 | from_commit="HEAD" 219 | fi 220 | out="from commit: $from_commit"$'\n' 221 | 222 | if [[ $add_spaces ]]; then 223 | out+=$'\n' 224 | fi 225 | fi 226 | 227 | # `2>&1` and `|| exit 0` are to avoid always seeing a git-blame error at 228 | # the end (its failure is the only successful exit condition of this 229 | # script). 230 | # 231 | # FIXME: We're really only interested in blocking one case of the error. As 232 | # this blocks all git-blame errors from being informed to the user, we 233 | # might want to reconsider. Maybe we can add an option specific to this 234 | # script to allow the showing of these errors. 235 | # 236 | # For a default behaviour, we show the error if this is the first iteration 237 | # of this script. In other words, if the user hasn't been given any useful 238 | # output, then probably the error is more interesting than ususal. 239 | # 240 | # XXX: The other issue with this is that we're moving stderr stuff to 241 | # stdout. Maybe we should use temporary files to keep them separate and 242 | # still hold them from being shown to the user. 243 | info "calling %s\n" "git blame ${args_for_blame[*]}" 244 | if [[ "$called_by_ourselves" ]]; then 245 | blame_out="$(git blame "${args_for_blame[@]}" 2>&1)" || exit 0 246 | else 247 | blame_out="$(git blame "${args_for_blame[@]}")" 248 | fi 249 | 250 | # We're alive! So output your stuff. 251 | cat <<< "$out$blame_out" 252 | 253 | if [[ $add_spaces ]]; then 254 | echo 255 | fi 256 | 257 | latest_commit="$( 258 | <<< "$blame_out" \ 259 | sed 's/ .*//' \ 260 | | grep -Ev '^0+$' \ 261 | | sort \ 262 | | uniq \ 263 | | xargs -r git show -s --format='%cI %h' \ 264 | | sort -k1 \ 265 | | tail -1 \ 266 | | cut -d' ' -f2 267 | )" 268 | 269 | next_args=("--called-by-ourselves") 270 | if [[ $diagnostics ]]; then 271 | next_args+=(--diagnostics) 272 | fi 273 | 274 | if [[ ! $add_headers ]]; then 275 | next_args+=(--no-headers) 276 | fi 277 | 278 | if [[ ! $add_spaces ]]; then 279 | next_args+=(--no-spaces) 280 | fi 281 | 282 | info "from_commit_position is: %s\n" "$from_commit_position" 283 | 284 | info "next_args prefix from args for git-blame: %s\n" "${args_for_blame[*]:0:$((from_commit_position))}" 285 | next_args+=( 286 | "${args_for_blame[@]:0:$((from_commit_position))}" 287 | "$latest_commit~" 288 | ) 289 | 290 | if [[ $insert_commit ]]; then 291 | info "next_args suffix from args for git-blame: %s\n" "${args_for_blame[@]:$from_commit_position}" 292 | next_args+=("${args_for_blame[@]:$from_commit_position}") 293 | else 294 | info "next_args suffix from args for git-blame: %s\n" "${args_for_blame[@]:$((from_commit_position + 1))}" 295 | next_args+=("${args_for_blame[@]:$((from_commit_position + 1))}") 296 | fi 297 | 298 | # exec for tail-call optimization 299 | info "calling %s\n" "$0 ${next_args[*]}" 300 | exec "$0" "${next_args[@]}" 301 | --------------------------------------------------------------------------------