Add convenience options to mk-ebuild-snapshot.bash
- -a: run `git add` on the new snapshot ebuild - -n: only print the new ebuild, do not write it to disk - -r: delete older snapshot ebuilds
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@ -7,15 +7,22 @@
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# terms and a link to the Git history.
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set -eu
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set -o pipefail
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cd "$(dirname "$0")"
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parse_version_from_SConstruct() {
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local version
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unset descent_version_MAJOR descent_version_MINOR descent_version_MICRO
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# Read the blob SConstruct from the chosen $git_commit. For lines that
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# assign a decimal number to a variable matching VERSION_\w\+, print a=b
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# where a is the suffix of the variable and b is the decimal value.
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# Discard all other lines. Printed lines are iterated to assign shell
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# variables of matching names.
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for version in $( git show "$git_commit:SConstruct" | sed -n -e 's/^\s*VERSION_\(\w\+\)\s*=\s*\([0-9]\+\)/\1=\2/p' ); do
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printf -v "descent_version_${version%=*}" '%s' "${version#*=}"
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done
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# Test that the three expected values were assigned.
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[[ -n "$descent_version_MAJOR" ]]
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[[ -n "$descent_version_MINOR" ]]
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[[ -n "$descent_version_MICRO" ]]
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@ -23,6 +30,8 @@ parse_version_from_SConstruct() {
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set_git_commit_information() {
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declare -a git_commit_information
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# Retrieve the date and hash of the chosen $git_commit. Store them to
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# shell variables for later use.
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git_commit_information=( $(git log -1 '--pretty=%ad %H' '--date=format:%Y%m%d' "$git_commit" ) )
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git_commit_date="${git_commit_information[0]}"
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git_commit_hash="${git_commit_information[1]}"
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@ -31,19 +40,64 @@ set_git_commit_information() {
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generate_snapshot_ebuild() {
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[[ -n "$git_commit_date" ]]
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[[ -n "$git_commit_hash" ]]
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local live_ebuild
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local live_ebuild snapshot_ebuild
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live_ebuild=contrib/gentoo/games-action/dxx-rebirth/dxx-rebirth-9999.ebuild
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snapshot_ebuild="${live_ebuild%/*}/dxx-rebirth-${descent_version_MAJOR}.${descent_version_MINOR}.${descent_version_MICRO}_pre${git_commit_date}.ebuild"
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# Read the blob of the live ebuild from the chosen $git_commit. Pipe the
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# blob to a sed that inserts the commit hash into the assignment to
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# `MY_COMMIT`. In dry-run mode, stdout remains directed to where the
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# caller set it. In non-dry-run mode, stdout is redirected to the non-live
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# file named by $snapshot_ebuild.
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git show "$git_commit:$live_ebuild" | \
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sed -e "s/MY_COMMIT=''/MY_COMMIT='$git_commit_hash'/" \
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> "$(dirname "$live_ebuild")/dxx-rebirth-${descent_version_MAJOR}.${descent_version_MINOR}.${descent_version_MICRO}_pre${git_commit_date}.ebuild"
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(
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[[ -z "$dry" ]] && exec > "$snapshot_ebuild"
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exec sed -e "s/MY_COMMIT=''/MY_COMMIT='$git_commit_hash'/"
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)
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# If the caller requested to add the newly created ebuild to git, do so.
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if [[ -z "$dry" && -n "$add_snapshot" ]]; then
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git add "$snapshot_ebuild"
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fi
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# If the caller requested to remove all older snapshot ebuilds from git, do
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# so.
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if [[ -n "$remove_snapshot" ]]; then
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# List snapshot ebuilds, but tell git not to show the just-created
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# snapshot ebuild. This prevents the `git rm` from removing the
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# just-created snapshot ebuild.
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git ls-files -z 'contrib/gentoo/games-action/dxx-rebirth/dxx-rebirth-*.*_pre*.ebuild' ':!'"$snapshot_ebuild" | xargs -0 git rm
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fi
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}
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if [[ "$#" = 0 ]]; then
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add_snapshot=
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dry=
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remove_snapshot=
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while getopts anr OPTNAME; do
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case "$OPTNAME" in
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a)
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add_snapshot=1
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;;
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n)
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dry=1
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;;
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r)
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remove_snapshot=1
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;;
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esac
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done
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# If not otherwise specified, read the most recent commit.
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if [[ "$#" -lt $OPTIND ]]; then
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git_commit=HEAD
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else
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git_commit="$1"
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fi
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# In dry-run mode, the snapshot ebuild will not be created, so it cannot be
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# added to git.
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if [[ -n "$dry" ]]; then
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add_snapshot=
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fi
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parse_version_from_SConstruct
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set_git_commit_information
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generate_snapshot_ebuild
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