[TUHS] unix v4 tape found

[Diomidis Spinellis via TUHS]

With the tape now available as a synthetic Git repo [1], I run git-blame 
on the V4 and V5 files [2].

V4's composition is as follows in terms of lines:

v4 75676
v3 6590
v2 168

So, a lot of new material and about 10% coming from earlier editions.

V5 is as follows:

v5 11181
v4 52238
v3 3296
v2 168

So, quite close to V5, but not entirely so.

[1] https://github.com/dspinellis/unix-history-repo

[2]
for ref in Research-V4-Snapshot-Development \
   Research-V5-Snapshot-Development ; do
   echo $ref
   git ls-tree -r --name-only $ref |
     grep -Ev 'README|LICENSE|\.pdf|\.ref' |
     xargs -I '{}' git blame -M -M -C -C $ref -- '{}' |
     sort |
     uniq -c |
     awk '{("git show " $2 "| awk '\''/Synthesized-from:/{print 
$2}'\''") | getline ver; total[ver] += $1 }
       END {for (v in total) print v, total[v]}'
done


On 20-Dec-25 06:28, Matt Day via TUHS wrote:
> Cool, thanks Angelo.. I got it running easily thanks to your efforts.
> 
> At a glance it looks like Fifth Edition to me... all the files are
> timestamped June 10 - 12, 1974. Commands present include col, dd, diff,
> eqn, glob, lpr, msh, neqn, pwd, spell, and tee -- according to
> https://dspinellis.github.io/unix-history-man/man1.html those commands
> first appeared in Fifth Edition and were not present in Fourth.