hooks/pre-commit.sh

   1 #!/bin/sh
   2 # TopGit - A different patch queue manager
   3 # (c) Petr Baudis <pasky@suse.cz>  2008
   4 # GPLv2
   5
   6
   7 ## Set up all the tg machinery
   8
   9 set -e
  10 tg__include=1
  11 tg_util() {
  12         . "@bindir@"/tg
  13 }
  14 tg_util
  15
  16
  17 ## Generally have fun
  18
  19 # Don't do anything on non-topgit branch
  20 if head_=$(git symbolic-ref -q HEAD); then
  21         case "$head_" in
  22                 refs/heads/*)
  23                         head_="${head_#refs/heads/}"
  24                         git rev-parse -q --verify "refs/top-bases/$head_" >/dev/null || exit 0;;
  25                 *)
  26                         exit 0;;
  27         esac
  28
  29 else
  30         exit 0;
  31 fi
  32
  33 check_topfile()
  34 {
  35         local tree file ls_line type size
  36         tree=$1
  37         file=$2
  38
  39         ls_line="$(git ls-tree --long "$tree" "$file")" ||
  40                 die "Can't ls tree for $file"
  41
  42         [ -n "$ls_line" ] ||
  43                 die "$file is missing"
  44
  45         # check for type and size
  46         set -- $ls_line
  47         type=$2
  48         size=$4
  49
  50         # check file is of type blob (file)
  51         [ "x$type" = "xblob" ] ||
  52                 die "$file is not a file"
  53
  54         # check for positive size
  55         [ "$size" -gt 0 ] ||
  56                 die "$file has empty size"
  57 }
  58
  59 tree=$(git write-tree) ||
  60         die "Can't write tree"
  61
  62 check_topfile "$tree" ".topdeps"
  63 check_topfile "$tree" ".topmsg"
  64
  65 check_cycle_name()
  66 {
  67         [ "$head_" != "$_dep" ] ||
  68                 die "TopGit dependencies form a cycle: perpetrator is $_name"
  69 }
  70
  71 # we only need to check newly added deps and for these if a path exists to the
  72 # current HEAD
  73 git diff --cached "$root_dir/.topdeps" |
  74         awk '
  75 BEGIN      { in_hunk = 0; }
  76 /^@@ /     { in_hunk = 1; }
  77 /^\+/      { if (in_hunk == 1) printf("%s\n", substr($0, 2)); }
  78 /^[^@ +-]/ { in_hunk = 0; }
  79 ' |
  80         while read newly_added; do
  81                 ref_exists "$newly_added" ||
  82                         die "Invalid branch as dependent: $newly_added"
  83
  84                 # check for self as dep
  85                 [ "$head_" != "$newly_added" ] ||
  86                         die "Can't have myself as dep"
  87
  88                 # deps can be non-tgish but we can't run recurse_deps() on them
  89                 ref_exists "refs/top-bases/$newly_added" ||
  90                         continue
  91
  92                 # recurse_deps uses dfs but takes the .topdeps from the tree,
  93                 # therefore no endless loop in the cycle-check
  94                 no_remotes=1 recurse_deps check_cycle_name "$newly_added"
  95         done
  96
  97 # check for repetitions of deps
  98 depdir="$(get_temp tg-depdir -d)" ||
  99         die "Can't check for multiple occurrences of deps"
 100 cat_file "(i):.topdeps" |
 101         while read dep; do
 102                 [ ! -d "$depdir/$dep" ] ||
 103                         die "Multiple occurrences of the same dep: $dep"
 104                 mkdir -p "$depdir/$dep" ||
 105                         die "Can't check for multiple occurrences of deps"
 106         done