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authorLuke Shumaker <lukeshu@datawire.io>2021-04-27 21:17:41 (GMT)
committerJunio C Hamano <gitster@pobox.com>2021-04-28 07:47:18 (GMT)
commit5cdae0f6fd76bd1c12304240a17a5a12632fbb12 (patch)
tree816c65eb84377a75bcdd7f09d1ee76bb342e6157 /contrib/subtree/git-subtree.sh
parentcbb5de8b83f3abde8f9b37b0048bc00344b6709b (diff)
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subtree: add comments and sanity checks
For each function in subtree, add a usage comment saying what the arguments are, and add an `assert` checking the number of arguments. In figuring out each thing's arguments in order to write those comments and assertions, it turns out that find_existing_splits is written as if it takes multiple 'revs', but it is in fact only ever passed a single 'rev': unrevs="$(find_existing_splits "$dir" "$rev")" || exit $? So go ahead and codify that by documenting and asserting that it takes exactly two arguments, one dir and one rev. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'contrib/subtree/git-subtree.sh')
-rwxr-xr-xcontrib/subtree/git-subtree.sh64
1 files changed, 61 insertions, 3 deletions
diff --git a/contrib/subtree/git-subtree.sh b/contrib/subtree/git-subtree.sh
index 7fbd848..441571c 100755
--- a/contrib/subtree/git-subtree.sh
+++ b/contrib/subtree/git-subtree.sh
@@ -55,6 +55,7 @@ arg_split_annotate=
arg_addmerge_squash=
arg_addmerge_message=
+# Usage: debug [MSG...]
debug () {
if test -n "$arg_debug"
then
@@ -62,6 +63,7 @@ debug () {
fi
}
+# Usage: progress [MSG...]
progress () {
if test -z "$GIT_QUIET"
then
@@ -69,6 +71,7 @@ progress () {
fi
}
+# Usage: assert CMD...
assert () {
if ! "$@"
then
@@ -192,7 +195,9 @@ main () {
"cmd_$arg_command" "$@"
}
+# Usage: cache_setup
cache_setup () {
+ assert test $# = 0
cachedir="$GIT_DIR/subtree-cache/$$"
rm -rf "$cachedir" ||
die "Can't delete old cachedir: $cachedir"
@@ -203,6 +208,7 @@ cache_setup () {
debug "Using cachedir: $cachedir" >&2
}
+# Usage: cache_get [REVS...]
cache_get () {
for oldrev in "$@"
do
@@ -214,6 +220,7 @@ cache_get () {
done
}
+# Usage: cache_miss [REVS...]
cache_miss () {
for oldrev in "$@"
do
@@ -224,7 +231,9 @@ cache_miss () {
done
}
+# Usage: check_parents PARENTS_EXPR INDENT
check_parents () {
+ assert test $# = 2
missed=$(cache_miss "$1") || exit $?
local indent=$(($2 + 1))
for miss in $missed
@@ -237,11 +246,15 @@ check_parents () {
done
}
+# Usage: set_notree REV
set_notree () {
+ assert test $# = 1
echo "1" > "$cachedir/notree/$1"
}
+# Usage: cache_set OLDREV NEWREV
cache_set () {
+ assert test $# = 2
oldrev="$1"
newrev="$2"
if test "$oldrev" != "latest_old" &&
@@ -253,7 +266,9 @@ cache_set () {
echo "$newrev" >"$cachedir/$oldrev"
}
+# Usage: rev_exists REV
rev_exists () {
+ assert test $# = 1
if git rev-parse "$1" >/dev/null 2>&1
then
return 0
@@ -262,17 +277,22 @@ rev_exists () {
fi
}
-# if a commit doesn't have a parent, this might not work. But we only want
+# Usage: try_remove_previous REV
+#
+# If a commit doesn't have a parent, this might not work. But we only want
# to remove the parent from the rev-list, and since it doesn't exist, it won't
# be there anyway, so do nothing in that case.
try_remove_previous () {
+ assert test $# = 1
if rev_exists "$1^"
then
echo "^$1^"
fi
}
+# Usage: find_latest_squash DIR
find_latest_squash () {
+ assert test $# = 1
debug "Looking for latest squash ($dir)..."
dir="$1"
sq=
@@ -316,10 +336,12 @@ find_latest_squash () {
done || exit $?
}
+# Usage: find_existing_splits DIR REV
find_existing_splits () {
+ assert test $# = 2
debug "Looking for prior splits..."
dir="$1"
- revs="$2"
+ rev="$2"
main=
sub=
local grep_format="^git-subtree-dir: $dir/*\$"
@@ -328,7 +350,7 @@ find_existing_splits () {
grep_format="^Add '$dir/' from commit '"
fi
git log --grep="$grep_format" \
- --no-show-signature --pretty=format:'START %H%n%s%n%n%b%nEND%n' $revs |
+ --no-show-signature --pretty=format:'START %H%n%s%n%n%b%nEND%n' "$rev" |
while read a b junk
do
case "$a" in
@@ -365,7 +387,9 @@ find_existing_splits () {
done || exit $?
}
+# Usage: copy_commit REV TREE FLAGS_STR
copy_commit () {
+ assert test $# = 3
# We're going to set some environment vars here, so
# do it in a subshell to get rid of them safely later
debug copy_commit "{$1}" "{$2}" "{$3}"
@@ -391,7 +415,9 @@ copy_commit () {
) || die "Can't copy commit $1"
}
+# Usage: add_msg DIR LATEST_OLD LATEST_NEW
add_msg () {
+ assert test $# = 3
dir="$1"
latest_old="$2"
latest_new="$3"
@@ -410,7 +436,9 @@ add_msg () {
EOF
}
+# Usage: add_squashed_msg REV DIR
add_squashed_msg () {
+ assert test $# = 2
if test -n "$arg_addmerge_message"
then
echo "$arg_addmerge_message"
@@ -419,7 +447,9 @@ add_squashed_msg () {
fi
}
+# Usage: rejoin_msg DIR LATEST_OLD LATEST_NEW
rejoin_msg () {
+ assert test $# = 3
dir="$1"
latest_old="$2"
latest_new="$3"
@@ -438,7 +468,9 @@ rejoin_msg () {
EOF
}
+# Usage: squash_msg DIR OLD_SUBTREE_COMMIT NEW_SUBTREE_COMMIT
squash_msg () {
+ assert test $# = 3
dir="$1"
oldsub="$2"
newsub="$3"
@@ -460,12 +492,16 @@ squash_msg () {
echo "git-subtree-split: $newsub"
}
+# Usage: toptree_for_commit COMMIT
toptree_for_commit () {
+ assert test $# = 1
commit="$1"
git rev-parse --verify "$commit^{tree}" || exit $?
}
+# Usage: subtree_for_commit COMMIT DIR
subtree_for_commit () {
+ assert test $# = 2
commit="$1"
dir="$2"
git ls-tree "$commit" -- "$dir" |
@@ -479,7 +515,9 @@ subtree_for_commit () {
done || exit $?
}
+# Usage: tree_changed TREE [PARENTS...]
tree_changed () {
+ assert test $# -gt 0
tree=$1
shift
if test $# -ne 1
@@ -496,7 +534,9 @@ tree_changed () {
fi
}
+# Usage: new_squash_commit OLD_SQUASHED_COMMIT OLD_NONSQUASHED_COMMIT NEW_NONSQUASHED_COMMIT
new_squash_commit () {
+ assert test $# = 3
old="$1"
oldsub="$2"
newsub="$3"
@@ -511,7 +551,9 @@ new_squash_commit () {
fi
}
+# Usage: copy_or_skip REV TREE NEWPARENTS
copy_or_skip () {
+ assert test $# = 3
rev="$1"
tree="$2"
newparents="$3"
@@ -586,7 +628,9 @@ copy_or_skip () {
fi
}
+# Usage: ensure_clean
ensure_clean () {
+ assert test $# = 0
if ! git diff-index HEAD --exit-code --quiet 2>&1
then
die "Working tree has modifications. Cannot add."
@@ -597,12 +641,16 @@ ensure_clean () {
fi
}
+# Usage: ensure_valid_ref_format REF
ensure_valid_ref_format () {
+ assert test $# = 1
git check-ref-format "refs/heads/$1" ||
die "'$1' does not look like a ref"
}
+# Usage: process_split_commit REV PARENTS INDENT
process_split_commit () {
+ assert test $# = 3
local rev="$1"
local parents="$2"
local indent=$3
@@ -654,6 +702,8 @@ process_split_commit () {
cache_set latest_old "$rev"
}
+# Usage: cmd_add REV
+# Or: cmd_add REPOSITORY REF
cmd_add () {
ensure_clean
@@ -681,7 +731,9 @@ cmd_add () {
fi
}
+# Usage: cmd_add_repository REPOSITORY REFSPEC
cmd_add_repository () {
+ assert test $# = 2
echo "git fetch" "$@"
repository=$1
refspec=$2
@@ -689,9 +741,11 @@ cmd_add_repository () {
cmd_add_commit FETCH_HEAD
}
+# Usage: cmd_add_commit REV
cmd_add_commit () {
# The rev has already been validated by cmd_add(), we just
# need to normalize it.
+ assert test $# = 1
rev=$(git rev-parse --verify "$1^{commit}") || exit $?
debug "Adding $dir as '$rev'..."
@@ -722,6 +776,7 @@ cmd_add_commit () {
say >&2 "Added dir '$dir'"
}
+# Usage: cmd_split [REV]
cmd_split () {
if test $# -eq 0
then
@@ -801,6 +856,7 @@ cmd_split () {
exit 0
}
+# Usage: cmd_merge REV
cmd_merge () {
test $# -eq 1 ||
die "You must provide exactly one revision. Got: '$*'"
@@ -837,6 +893,7 @@ cmd_merge () {
fi
}
+# Usage: cmd_pull REPOSITORY REMOTEREF
cmd_pull () {
if test $# -ne 2
then
@@ -848,6 +905,7 @@ cmd_pull () {
cmd_merge FETCH_HEAD
}
+# Usage: cmd_push REPOSITORY REMOTEREF
cmd_push () {
if test $# -ne 2
then