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update-channel-branches: fix to work with posix /bin/sh

Browse Source 
Should now work equally well with bash (as on NixOS) and dash (on
various other distributions).

The only truly required change was on line 10: "function" is a
superfluous keyword that's not present in posix sh.

Change-Id: If917499b2e24c0d039e8c61208227b90c9fc5c0d
This commit is contained in:
Benjamin Staffin 2015-02-17 17:02:25 -08:00
parent c08716029b
commit 92aef0621f
1 changed files with 13 additions and 12 deletions
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25
maintainers/scripts/update-channel-branches.sh
View File

@ -1,13 +1,14 @@
#!/bin/sh
set -e
: ${NIXOS_CHANNELS:=https://nixos.org/channels/}
: ${CHANNELS_NAMESPACE:=refs/heads/channels/}
# List all channels which are currently in the repository which we would
# have to remove if they are not found again.
deadChannels=$(git for-each-ref --format="%(refname)" $CHANNELS_NAMESPACE)
deadChannels=$(git for-each-ref --format="%(refname)" "$CHANNELS_NAMESPACE")
function updateRef() {
updateRef() {
local channelName=$1
local newRev=$2
@ -17,9 +18,9 @@ function updateRef() {
# Update the local refs/heads/channels/* branches to be in-sync with the
# channel references.
local branch=$CHANNELS_NAMESPACE$channelName
oldRev=$(git rev-parse --short $branch 2>/dev/null || true)
oldRev=$(git rev-parse --short "$branch" 2>/dev/null || true)
if test "$oldRev" != "$newRev"; then
if git update-ref $branch $newRev 2>/dev/null; then
if git update-ref "$branch" "$newRev" 2>/dev/null; then
if test -z "$oldRev"; then
echo " * [new branch] $newRev -> ${branch#refs/heads/}"
else
@ -35,21 +36,21 @@ function updateRef() {
fi
# Filter out the current channel from the list of dead channels.
deadChannels=$(grep -v $CHANNELS_NAMESPACE$channelName <<EOF
deadChannels=$(grep -v "$CHANNELS_NAMESPACE$channelName" <<EOF
$deadChannels
EOF
)
) ||true
}
# Find the name of all channels which are listed in the directory.
echo "Fetching channels from $NIXOS_CHANNELS:"
for channelName in : $(curl -s $NIXOS_CHANNELS | sed -n '/folder/ { s,.*href=",,; s,/".*,,; p }'); do
for channelName in : $(curl -s "$NIXOS_CHANNELS" | sed -n '/folder/ { s,.*href=",,; s,/".*,,; p }'); do
test "$channelName" = : && continue;
# Do not follow redirections, such that we can extract the
# short-changeset from the name of the directory where we are
# redirected to.
sha1=$(curl -sI $NIXOS_CHANNELS$channelName | sed -n '/Location/ { s,.*\.\([a-f0-9]*\)[ \r]*$,\1,; p; }')
sha1=$(curl -sI "$NIXOS_CHANNELS$channelName" | sed -n '/Location/ { s,.*\.\([a-f0-9]*\)[ \r]*$,\1,; p; }')
updateRef "remotes/$channelName" "$sha1"
done
@ -60,13 +61,13 @@ if currentSystem=$(nixos-version 2>/dev/null); then
# then the version is not annotated in git version. This sed
# expression is basically matching that the expressions end with
# ".<sha1> (Name)" to extract the sha1.
sha1=$(echo $currentSystem | sed -n 's,^.*\.\([a-f0-9]*\) *(.*)$,\1,; T skip; p; :skip;')
sha1=$(echo "$currentSystem" | sed -n 's,^.*\.\([a-f0-9]*\) *(.*)$,\1,; T skip; p; :skip;')
updateRef current-system "$sha1"
fi
echo "Fetching channels from ~/.nix-defexpr:"
for revFile in : $(find -L ~/.nix-defexpr/ -maxdepth 4 -name svn-revision); do
echo "Fetching channels from $HOME/.nix-defexpr:"
for revFile in : $(find -L "$HOME/.nix-defexpr/" -maxdepth 4 -name svn-revision); do
test "$revFile" = : && continue;
# Deconstruct a path such as, into:
@ -85,7 +86,7 @@ for revFile in : $(find -L ~/.nix-defexpr/ -maxdepth 4 -name svn-revision); do
test -z "$user" && user=$USER
channelName="$user${user:+/}$repo"
sha1=$(cat $revFile | sed -n 's,^.*\.\([a-f0-9]*\)$,\1,; T skip; p; :skip;')
sha1=$(sed -n 's,^.*\.\([a-f0-9]*\)$,\1,; T skip; p; :skip;' "$revFile")
updateRef "$channelName" "$sha1"
done