thaliaarchi

readtape has now been updated for portability.

Unix V1 also used 1/60 seconds

I was talking about the performance, not the feature set. Russ Cox's re1 and the re1.5 fork have several engines for different implementation strategies. re1 was written for primarily pedagogical reasons, so its minimality comes from that.

The engine chosen by MicroPython is vulnerable to catastrophic backtracking and switching to the Pike VM implementation would fix that. Instead of backtracking in the text when the pattern doesn't match, the Pike VM iterates each char in the text only once, visiting the states valid for that position in lock step. Consequently, it allocates a list of “thread”s, proportional in length to the number of states in the pattern (though usually patterns have relatively few states). Many security issues have resulted from regexp denials of service, so this slight memory tradeoff might be worthwhile.

Since recursiveloop.c has been changed by MicroPython, those changes would need to be ported to pike.c. The fixes are small and none of the extra features exploit the backtracking, so this should be easy.

I just built my PiDP-11 and would love to get one of these.

Simple format. Makes me want to write a parser for it using a shared buffered reader library I’m working on in Rust.

Or easier, do an interactive rebase and mark the last commit which is in the partial-rebase branch for editing. Then, do `git reset --hard partial-rebase` and continue the rebase.

That explains why there’s so many Swiss APIs.

I use the following to create a commit using the latest modification date of the staged files. If you put it in your PATH as git-tcommit, you can invoke it as `git tcommit`. If GIT_AUTHOR_DATE or GIT_COMMITTER_DATE is passed, it overrides the modified time, and it honors TZ. It works with GNU or BSD.

    #!/usr/bin/env bash
    set -eEuo pipefail

    # `git commit`, using the latest file modification time as the commit and author
    # dates, when GIT_AUTHOR_DATE or GIT_COMMITTER_DATE, respectively, is not set.

    # Use fractional seconds when available to display the newest file more
    # accurately, even though Git only uses seconds.
    if which gstat >/dev/null; then
      stat=(gstat --format='%.Y %n') # Detected aliased GNU coreutils
    elif stat --version 2>/dev/null | grep -q 'GNU coreutils'; then
      stat=(stat --format='%.Y %n') # Detected GNU coreutils
    else
      stat=(stat -f '%m %N') # Fallback to BSD-style, which only reports seconds
    fi

    # Select the latest modified time of all staged files, excluding deletions.
    modified="$(
      cd "$(git rev-parse --show-toplevel)" &&
      git diff --staged --diff-filter=d --name-only -z |
        xargs -0 "${stat[@]}" |
        sort -rn |
        head -1
    )"

    modified_seconds=
    if [[ -n $modified ]]; then
      modified_seconds="${modified%% *}"
      modified_file="${modified#* }"
      modified_date="$(date -r "${modified_seconds%.*}" +'%Y-%m-%d %H:%M:%S %z')"
      echo "Modify date: $modified_date ($modified_file)"
    fi
    author_seconds="$modified_seconds"
    committer_seconds="$modified_seconds"
    if [[ -n ${GIT_AUTHOR_DATE+.} ]]; then
      echo "Author date: ${GIT_AUTHOR_DATE:-now}"
    fi
    if [[ -n ${GIT_COMMITTER_DATE+.} ]]; then
      echo "Commit date: ${GIT_COMMITTER_DATE:-now}"
    else
      last_commit_seconds="$(git show -s --format=%at HEAD 2>/dev/null || echo 0)"
      if [[ $modified_seconds < $last_commit_seconds ]]; then
        committer_seconds=
        echo "Commit date: now (last commit: $(git show -s --format=%ai HEAD 2>/dev/null))"
      fi
    fi

    GIT_AUTHOR_DATE="${GIT_AUTHOR_DATE-"$author_seconds"}" \
    GIT_COMMITTER_DATE="${GIT_COMMITTER_DATE-"$committer_seconds"}" \
    exec git commit "$@"

This was also a year before Mad Libs was invented in 1953, using the same template-filling style.