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#!/usr/bin/env -S qjs --std
/* adds clickable links to git log, git branch and git stash list
* usage:
* 0. install QuickJS (https://bellard.org/quickjs)
* 1. put this script in your CGI directory
* 2. chmod +x /your/cgi-bin/directory/git.cgi
* 3. ln -s /your/cgi-bin/directory/git.cgi /usr/local/bin/gitcha
* 4. run `gitcha log', `gitcha switch' or `gitcha stash list'
* other params work too, but without any special processing. it's still useful
* for ones that open the pager, like git show; this way you can reload the view
* with `U'.
* it's less convenient for e.g. git checkout and friends, so it may be best to
* just alias the pager-opening commands.
* (if you have ansi2html, it also works with w3m. just set GITCHA_CHA=w3m) */
const gitcha = std.getenv("GITCHA_GITCHA") ?? "gitcha";
if (scriptArgs[0].split('/').pop() == gitcha) {
const cha = std.getenv("GITCHA_CHA") ?? 'cha';
const params = encodeURIComponent(scriptArgs.slice(1)
.map(x => encodeURIComponent(x)).join(' '));
const [path, _] = os.getcwd();
const prefix = cha == "w3m" ? '/cgi-bin/' : "cgi-bin:";
os.exec([cha, `${prefix}git.cgi?params=${params}&path=${path}&prefix=${prefix}`]);
std.exit(0);
}
const query = {};
for (const p of std.getenv("QUERY_STRING").split('&')) {
const sp = p.split('=');
query[decodeURIComponent(sp[0])] = decodeURIComponent(sp[1] ?? '');
}
function startGitCmd(config, params) {
std.out.puts("Content-Type: text/html\n\n");
std.out.flush();
const [read_fd, write_fd] = os.pipe();
const [read_fd2, write_fd2] = os.pipe();
os.exec(["git", ...config, ...params], {
stdout: write_fd,
block: false
});
os.close(write_fd);
const libexecDir = std.getenv("CHA_LIBEXEC_DIR") ??
'/usr/local/libexec/chawan';
const title = encodeURIComponent('git ' + params.join(' '));
os.exec([libexecDir + "/ansi2html", "-st", title], {
stdin: read_fd,
stdout: write_fd2,
block: false
});
os.close(read_fd);
os.close(write_fd2);
return std.fdopen(read_fd2, "r");
}
function runGitCmd(config, params, regex, subfun) {
const f = startGitCmd(config, params);
while ((l = f.getline()) !== null) {
console.log(l.replace(regex, subfun));
}
f.close();
}
os.chdir(query.path);
const config = ["-c", "color.ui=always", "-c", "log.decorate=short"];
const params = query.params ? decodeURIComponent(query.params).split(' ')
.map(x => decodeURIComponent(x)) : [];
const cgi0 = `${query.prefix}git.cgi?prefix=${query.prefix}&path=${query.path}`;
const cgi1 = `${cgi0}¶ms=show`;
const cgi2 = `${cgi0}¶ms=log`;
const cgi3 = `${cgi0}¶ms=switch`;
const cgi4 = `${cgi0}¶ms=stash%20apply`;
if (params[0] == "log") {
runGitCmd(config, params, /[a-f0-9]{40}/g,
x => `<a href='${cgi1}%20${x}'>${x}</a>`)
} else if (params[0] == "branch" && params.length == 1) {
runGitCmd(config, params, /^(\s+)([\w.-]+)$/g,
(_, ws, name) => `${ws}<a href='${cgi2}%20${name}'>${name}</a>\
(<a href='${cgi3}%20${name}'>switch</a>)`);
} else if (params[0] == "stash" && params[1] == "list") {
runGitCmd(config, params, /^stash@\{([0-9]+)\}/g,
(s, n) => `stash@{<a href='${cgi1}%20${s}'>${n}</a>}\
(<a href='${cgi4}%20${s}'>apply</a>)`);
} else {
const title = encodeURIComponent('git ' + params.join(' '));
std.out.puts(`Content-Type: text/x-ansi;title=${title}\n\n`);
std.out.flush();
const pid = os.exec(["git", ...config, ...params], {
block: false,
stderr: 1
});
os.waitpid(pid, 0);
}
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