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kiss: fix pkg_update for extra colons in KISS_PATH (#59)

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If KISS_PATH=:: or even KISS_PATH=:/repo1:/repo2, the `IFS=:; set -- $KISS_PATH`
trick leaves some of $@ as empty strings. These cause git to print errors.
Instead, skip empty arguments.

Demonstration of bug:

    $ cd
    $ KISS_PATH=::: kiss u 2>&1 | sed '/Checking/q'
    -> Updating repositories
    fatal: not a git repository (or any of the parent directories): .git
    fatal: not a git repository (or any of the parent directories): .git
    fatal: not a git repository (or any of the parent directories): .git
    -> Checking for new package versions

The git commands producing the errors are:
    git -C "" rev-parse 'HEAD@{upstream}'
and when the argument to -C is empty, the current working directory is
unchanged. Therefore, if PWD happens to be inside a git tree, this
command could have unexpected effects: currently, if KISS_PATH contains
(an) extra colon(s), and PWD is in a git repo with an upstream, the repo
is updated irrespective of whether it is in KISS_PATH or a package repo.
This behaviour is also fixed by this commit.
This commit is contained in:
aabacchus 2022-08-10 19:56:54 +01:00 committed by GitHub
parent 6887884127
commit 96bb00372c
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@ -1577,6 +1577,7 @@ pkg_update() {
# Update each repository in '$KISS_PATH'.
for repo do
ok "$repo" || continue
if git -C "$repo" rev-parse 'HEAD@{upstream}' >/dev/null; then
repo_type=git