git-case-comment

#!/bin/bash
#
# Assumptions:
#  - in a git repository
#  - we can access git-case-common
#  - the branch defined by GIT_CASE_HEAD exists (see git-case-common)

START_DIR=`pwd`
source $(dirname $0)/git-case-common

test -z "$1" -o "$1" = "-h" && die "$PROGRAM [-a|--attach <file>] [-c|--stdin]"

ID=$(cat "$GIT_CASE_ACTIVE" 2>/dev/null || true)
test -z "$ID" && die "no active case set"

COMMENT_BASE="$ID/comments"
FILE_BASE="$ID/files"

# we work in the working dir
go_to_git_case_work_dir

COMMENT_FILE=$(mktemp -p "$GIT_CASE_WORK_DIR")
touch "$COMMENT_FILE"
DATE_2822=$(date -r "$COMMENT_FILE" --rfc-2822)
TIMESTAMP=$(date -r "$COMMENT_FILE" "+%s")

TEXT_FILE=
TEXT_FILTER=cat
declare -a ATTACH_NAMES
declare -a ATTACH_FILES
declare -a ATTACH_HASHES
while test -n "$1" ; do
        OPT="$1" ; shift
        case "$OPT" in
            -c|--stdin)
                TEXT_FILE=$(mktemp -p "$GIT_CASE_WORK_DIR")
                test -t 0 && echo "# type in your comment...">&2
                cat > "$TEXT_FILE"
                ;;
            -a|--attach)
                AFILE="$1" ; shift
                ATTACH_NAMES[${#ATTACH_NAMES}]="$AFILE"
                if test "${AFILE:0:1}" != '/' ; then
                        AFILE="$START_DIR/$AFILE"
                fi
                test -f "$AFILE" || die "$PROGRAM: '$AFILE' is not a valid file"
                ATTACH_FILES[${#ATTACH_FILES}]="$AFILE"
                ;;
            *)
                die "$PROGRAM: unknown option, see -h"
                ;;
        esac
done

if ! test -f "$TEXT_FILE" ; then
        shift
        TEXT_FILE=$(mktemp -p "$GIT_CASE_WORK_DIR")
        cat > "$TEXT_FILE" <<END

# Type in a comment for case $(gen_short_case_id $ID) above.
# Lines starting with '#' character are ignored.
END
        vim $TEXT_FILE
        TEXT_FILTER="grep -v ^#"
fi

if test "${#ATTACH_FILES}" -gt 0 ; then
        for ((a=0;a<"${#ATTACH_FILES[@]}";a++)) ; do
                AFILE="${ATTACH_FILES[$a]}"
                AHASH=$(git hash-object -t blob -w --stdin < "$AFILE")
                ATTACH_HASHES[$a]="$AHASH"
        done
fi

(
        echo "Date: $DATE_2822"
        echo "From: $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL>"
        if test "${#ATTACH_FILES}" -gt 0 ; then
                for ((a=0;a<"${#ATTACH_FILES[@]}";a++)) ; do
                        ANAME="${ATTACH_NAMES[$a]}"
                        AHASH="${ATTACH_HASHES[$a]}"
                        echo "Attachment: ${AHASH} ${ANAME}"
                done
        fi
        echo ""
        $TEXT_FILTER < "$TEXT_FILE"
) > "$COMMENT_FILE"

git read-tree -i --reset "$GIT_CASE_HEAD"

# create the comment file
COMMENT_HASH=$(git hash-object -t blob -w --stdin < "$COMMENT_FILE")
git update-index --add --cacheinfo 100644 "$COMMENT_HASH" "$COMMENT_BASE/$COMMENT_HASH"

# this is the message id
MESSAGE_ID="git-case-comment-$COMMENT_HASH@$HOSTNAME"
MESSAGE_ID=$(echo -n "$MESSAGE_ID" | tr -c 'A-Za-z0-9_.-' _)

# and now the backwards links
NULL_HASH=$(git hash-object -t blob -w --stdin < /dev/null)
git update-index --add --cacheinfo 100644 "$NULL_HASH" "$COMMENT_BASE/by-message-id/$MESSAGE_ID/$COMMENT_HASH"
git update-index --add --cacheinfo 100644 "$NULL_HASH" "$COMMENT_BASE/by-timestamp/$TIMESTAMP/$COMMENT_HASH"

if test "${#ATTACH_FILES}" -gt 0 ; then
        for ((a=0;a<"${#ATTACH_FILES[@]}";a++)) ; do
                ANAME="${ATTACH_NAMES[$a]}"
                AHASH="${ATTACH_HASHES[$a]}"
                git update-index --add --cacheinfo 100644 "$AHASH" "$FILE_BASE/$ANAME/$AHASH"
        done
fi

commit_index_and_update_branch "comment on $ID" "-p $GIT_CASE_HEAD"