1 #!/bin/bash
2 #
3 # Script to sync changes from upstream to -portable
4 #
5 # This script is under the same licence as gameoftrees itself.
6 
7 die()
8 {
9 	echo "$@" >&2
10 	exit 1
11 }
12 
13 [ -z "$(git status --porcelain)" ] || die "Working tree is not clean"
14 
15 echo "Updating main from origin..."
16 
17 # Update our copy of main 
18 git checkout -q main && \
19 git fetch -q -n upstream >/dev/null 2>&1 && \
20 git reset -q --hard upstream/main || {
21 	die "Couldn't fetch from main and reset to that branch"
22 }
23 
24 # Gather a list of commits to cherry-pick.
25 # Don't proceed with no commits.
26 commitc="$(git rev-list --count main...origin/main)"
27 [ -z "$commitc" -o "$commitc" -eq 0 ] && {
28 	echo "All commits uptodate.  Nothing to cherry-pick"
29 	exit
30 }
31 
32 # Create a branch from linux (which is where the result of the cherry-picks
33 # will ultimately end up, but we do this work on a topic branch so that we can
34 # perform CI on it, and not break the 'linux' branch.
35 
36 echo "Creating sync branch..."
37 git branch -q -D syncup >/dev/null 2>&1
38 git checkout -q linux && git checkout -q -b syncup || {
39 	die "Can't checkout syncup branch"
40 }
41 
42 echo "The following ($commitc) commits will be cherry-picked..."
43 git log --oneline main...origin/main
44 
45 read -p "Proceed? [Y/n]: " resp
46 
47 [ "$resp" = "N" -o "$resp" = "n" ] && exit
48 
49 # Pick the commits in reverse order.
50 git rev-list --reverse --first-parent main...origin/main | \
51 	git cherry-pick --stdin --no-rerere-autoupdate -Xtheirs
52 
53 [ $? -eq 0 ] && {
54 	# Sanity-check header files which are found portably and remove them.
55 	for h in 'sys\/queue.h' 'ssl\.h' 'endian\.h'
56 	do
57 		# Use git's pathspec notation to exclude matching on files
58 		# where we *want* to keep those headers.
59 		git grep -Li "$h" -- \
60 			':!maintscripts/**' \
61 			':!configure.ac' \
62 			':!gotweb/parse.y' \
63 			':!include/got_compat.h' | \
64 			while read file
65 			do
66 				sed -i -e "/$h/d" "$file"
67 			done
68 	done
69 
70 	echo "Performing sanity build..."
71 	./autogen.sh >/dev/null 2>&1 && \
72 	./configure >/dev/null 2>&1  && \
73 	make -j $(nproc) >/dev/null 2>&1 && {
74 		echo "   Passed!"
75 		echo "Creating commit for portable changes..."
76 		git commit -am "portable: remove include files found portably"
77 		echo "...Merging branch to linux"
78 		git checkout linux && git merge --ff-only - && {
79 			echo "Pushing to GH..."
80 			git push gh || die "Couldn't push linux to GH"
81 			git checkout main && \
82 			git push gh || die "Couldn't push main to GH"
83 		}
84 	} || die "Build failed"
85 }
86 
87 echo "Wait for Cirrus-CI..."
88 echo "Then push main and linux to origin"