stagit-gopher

static git page generator for gopher
git clone git://git.2f30.org/stagit-gopher.git
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commit 914880f31b04222fa2815f4f35543b72f881d5e4
parent 0bc47da0f7b66614cdf499755ceca1dc13ff91cd
Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date:   Sat, 30 Apr 2016 11:54:33 +0200

optimization: read stats once and remember it

for an initial run and new commits this speeds stagit up a bit:
on an initial run of sbase goes from about 4 seconds to 2.8 on my machine.

now we can't use statsbuf, so create the stats string ourselves, while at it
color the + and - using a style (can be disabled for the color-haters out
there ;)).

Diffstat:
stagit.c | 186++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-----------------
style.css | 2++
2 files changed, 149 insertions(+), 39 deletions(-)

diff --git a/stagit.c b/stagit.c @@ -15,6 +15,13 @@ #include "compat.h" #include "config.h" +struct deltainfo { + git_patch *patch; + + size_t addcount; + size_t delcount; +}; + struct commitinfo { const git_oid *id; @@ -25,16 +32,18 @@ struct commitinfo { const char *summary; const char *msg; - git_diff_stats *stats; - git_diff *diff; - git_commit *commit; - git_commit *parent; - git_tree *commit_tree; - git_tree *parent_tree; + git_diff *diff; + git_commit *commit; + git_commit *parent; + git_tree *commit_tree; + git_tree *parent_tree; size_t addcount; size_t delcount; size_t filecount; + + struct deltainfo **deltas; + size_t ndeltas; }; static git_repository *repo; @@ -49,12 +58,95 @@ static char cloneurl[1024]; static int haslicense, hasreadme, hassubmodules; void +deltainfo_free(struct deltainfo *di) +{ + if (!di) + return; + git_patch_free(di->patch); + di->patch = NULL; + free(di); +} + +int +commitinfo_getstats(struct commitinfo *ci) +{ + struct deltainfo *di; + const git_diff_delta *delta; + const git_diff_hunk *hunk; + const git_diff_line *line; + git_patch *patch = NULL; + size_t ndeltas, nhunks, nhunklines; + size_t i, j, k; + + ndeltas = git_diff_num_deltas(ci->diff); + if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *)))) + err(1, "calloc"); + + for (i = 0; i < ndeltas; i++) { + if (!(di = calloc(1, sizeof(struct deltainfo)))) + err(1, "calloc"); + if (git_patch_from_diff(&patch, ci->diff, i)) { + git_patch_free(patch); + goto err; + } + di->patch = patch; + ci->deltas[i] = di; + + delta = git_patch_get_delta(patch); + + /* check binary data */ + if (delta->flags & GIT_DIFF_FLAG_BINARY) + continue; + + nhunks = git_patch_num_hunks(patch); + for (j = 0; j < nhunks; j++) { + if (git_patch_get_hunk(&hunk, &nhunklines, patch, j)) + break; + for (k = 0; ; k++) { + if (git_patch_get_line_in_hunk(&line, patch, j, k)) + break; + if (line->old_lineno == -1) { + di->addcount++; + ci->addcount++; + } else if (line->new_lineno == -1) { + di->delcount++; + ci->delcount++; + } + } + } + } + ci->ndeltas = i; + ci->filecount = i; + + return 0; + +err: + if (ci->deltas) + for (i = 0; i < ci->ndeltas; i++) + deltainfo_free(ci->deltas[i]); + free(ci->deltas); + ci->deltas = NULL; + ci->ndeltas = 0; + ci->addcount = 0; + ci->delcount = 0; + ci->filecount = 0; + + return -1; +} + +void commitinfo_free(struct commitinfo *ci) { + size_t i; + if (!ci) return; - git_diff_stats_free(ci->stats); + if (ci->deltas) + for (i = 0; i < ci->ndeltas; i++) + deltainfo_free(ci->deltas[i]); + free(ci->deltas); + ci->deltas = NULL; git_diff_free(ci->diff); git_tree_free(ci->commit_tree); git_tree_free(ci->parent_tree); @@ -66,6 +158,7 @@ commitinfo_getbyoid(const git_oid *id) { struct commitinfo *ci; git_diff_options opts; + const git_oid *oid; int error; if (!(ci = calloc(1, sizeof(struct commitinfo)))) @@ -82,26 +175,24 @@ commitinfo_getbyoid(const git_oid *id) ci->summary = git_commit_summary(ci->commit); ci->msg = git_commit_message(ci->commit); - if ((error = git_commit_tree(&(ci->commit_tree), ci->commit))) + oid = git_commit_tree_id(ci->commit); + if ((error = git_tree_lookup(&(ci->commit_tree), repo, oid))) goto err; if (!(error = git_commit_parent(&(ci->parent), ci->commit, 0))) { - if ((error = git_commit_tree(&(ci->parent_tree), ci->parent))) - goto err; - } else { - ci->parent = NULL; - ci->parent_tree = NULL; + oid = git_commit_tree_id(ci->parent); + if ((error = git_tree_lookup(&(ci->parent_tree), repo, oid))) { + ci->parent = NULL; + ci->parent_tree = NULL; + } } git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION); opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH; if ((error = git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))) goto err; - if (git_diff_get_stats(&(ci->stats), ci->diff)) - goto err; - ci->addcount = git_diff_stats_insertions(ci->stats); - ci->delcount = git_diff_stats_deletions(ci->stats); - ci->filecount = git_diff_stats_files_changed(ci->stats); + if (commitinfo_getstats(ci) == -1) + goto err; return ci; @@ -332,33 +423,55 @@ printshowfile(FILE *fp, struct commitinfo *ci) const git_diff_hunk *hunk; const git_diff_line *line; git_patch *patch; - git_buf statsbuf; - size_t ndeltas, nhunks, nhunklines; + size_t nhunks, nhunklines, changed, add, del, total; size_t i, j, k; + char linestr[80]; printcommit(fp, ci); - memset(&statsbuf, 0, sizeof(statsbuf)); + if (!ci->deltas) + return; /* diff stat */ - if (ci->stats && - !git_diff_stats_to_buf(&statsbuf, ci->stats, - GIT_DIFF_STATS_FULL | GIT_DIFF_STATS_SHORT, 80)) { - if (statsbuf.ptr && statsbuf.ptr[0]) { - fputs("<b>Diffstat:</b>\n", fp); - xmlencode(fp, statsbuf.ptr, strlen(statsbuf.ptr)); + fputs("<b>Diffstat:</b>\n<table>", fp); + for (i = 0; i < ci->ndeltas; i++) { + delta = git_patch_get_delta(ci->deltas[i]->patch); + fputs("<tr><td>", fp); + xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path)); + if (strcmp(delta->old_file.path, delta->new_file.path)) { + fputs(" -&gt; ", fp); + xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path)); + } + + add = ci->deltas[i]->addcount; + del = ci->deltas[i]->delcount; + changed = add + del; + total = sizeof(linestr) - 2; + if (changed > total) { + if (add) + add = ((float)total / changed * add) + 1; + if (del) + del = ((float)total / changed * del) + 1; } + memset(&linestr, '+', add); + memset(&linestr[add], '-', del); + + fprintf(fp, "</td><td> | %zu <span class=\"i\">", + ci->deltas[i]->addcount + ci->deltas[i]->delcount); + fwrite(&linestr, 1, add, fp); + fputs("</span><span class=\"d\">", fp); + fwrite(&linestr[add], 1, del, fp); + fputs("</span></td></tr>\n", fp); } + fprintf(fp, "</table>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n", + ci->filecount, ci->filecount == 1 ? "" : "s", + ci->addcount, ci->addcount == 1 ? "" : "s", + ci->delcount, ci->delcount == 1 ? "" : "s"); fputs("<hr/>", fp); - ndeltas = git_diff_num_deltas(ci->diff); - for (i = 0; i < ndeltas; i++) { - if (git_patch_from_diff(&patch, ci->diff, i)) { - git_patch_free(patch); - break; - } - + for (i = 0; i < ci->ndeltas; i++) { + patch = ci->deltas[i]->patch; delta = git_patch_get_delta(patch); fprintf(fp, "<b>diff --git a/<a href=\"%sfile/%s.html\">%s</a> b/<a href=\"%sfile/%s.html\">%s</a></b>\n", relpath, delta->old_file.path, delta->old_file.path, @@ -367,7 +480,6 @@ printshowfile(FILE *fp, struct commitinfo *ci) /* check binary data */ if (delta->flags & GIT_DIFF_FLAG_BINARY) { fputs("Binary files differ\n", fp); - git_patch_free(patch); continue; } @@ -396,11 +508,7 @@ printshowfile(FILE *fp, struct commitinfo *ci) fputs("</a>", fp); } } - git_patch_free(patch); } - git_buf_free(&statsbuf); - - return; } int diff --git a/style.css b/style.css @@ -79,10 +79,12 @@ pre a.h { color: #00a; } +span.i, pre a.i { color: #070; } +span.d, pre a.d { color: #e00; }