plan9fox/sys/src/cmd/git/export
Ori Bernstein 758067ee56 git/export: use 'date -f' instead of 'date -m'
The '-m' flag was added to date largely
to support git scripts. It predates the
tmdate code, which is why it exists, but
it's a recent enough addition that nothing
I'm aware of uses it, other than git.

As a result, it would be good to remove
it, so let's do that.
2021-08-12 14:42:47 +00:00

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#!/bin/rc
rfork ne
. /sys/lib/git/common.rc
patchname=/tmp/git.patchname.$pid
patchfile=/tmp/git.patchfile.$pid
fn sigexit{
rm -f $patchname $patchfile
}
gitup
flagfmt='o:patchdir patchdir'; args='[query]'
eval `''{aux/getflags $*} || exec aux/usage
if(~ $#patchdir 1 && ! test -d $patchdir)
mkdir -p $patchdir
q=$*
if(~ $#q 0)
q=HEAD
commits=`{git/query $q || die $status}
n=1
m=$#commits
# sleazy hack: we want to run
# under rfork m for the web ui,
# so don't error if we can't mount
mntgen /mnt/scratch >[2]/dev/null || status=''
for(c in $commits){
cp=`{git/query -p $c}
pp=`{git/query -p $c'~'}
fc=`$nl{git/query -c $c~ $c | sed 's/^..//'}
@{
rfork n
cd /mnt/scratch
if(test -d $pp/tree)
bind $pp/tree a
if(test -d $cp/tree)
bind $cp/tree b
echo From: `{cat $cp/author}
echo Date: `{date -uf'WW, DD MMM YYYY hh:mm:ss Z' `{walk -em $cp/author}}
<$cp/msg awk '
NR == 1 {
n = ENVIRON["n"]
m = ENVIRON["m"]
msg=$0
if(m > 1)
patch = sprintf("[PATCH %d/%d]", n, m)
else
patch = "[PATCH]"
printf "Subject: %s %s\n\n", patch, msg
gsub("^[ ]|[ ]$", "", msg)
gsub("[^a-zA-Z0-9_]+", "-", msg)
printf "%.4d-%s.patch", n, msg >ENVIRON["patchname"]
next
}
{
print
}'
echo '---'
echo diff `{basename $pp} `{basename $cp}
for(f in $fc){
a=a/$f
if(! test -e $a)
a=/dev/null
b=b/$f
if(! test -e $b)
b=/dev/null
ape/diff -urN $a $b
}
} >$patchfile
if(~ $#patchdir 0){
cat $patchfile
! ~ $n $m && echo
}
if not{
f=$patchdir/`{cat $patchname}
mv $patchfile $f
echo $f
}
n=`{echo $n + 1 | bc}
}
exit ''