Show list of modified files in ui-commit.c

Compare current commit with 1.parent, and for each affected file display
current filemode, old filemode if changed, current filename and source
filename if it was a copy/rename.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

5 files changed, 281 insertions, 8 deletions

diff --git a/cgit.css b/cgit.css
index 94372d6..ae304fa 100644
--- a/cgit.css
+++ b/cgit.css
@@ -3,7 +3,7 @@ body {
         font-size: normal;
         background: white;
         padding: 0em;
-        margin: 0.5em;
+        margin: 0.5em 1em;
 }
 
 
@@ -50,16 +50,19 @@ img {
 
 
 div#header {
-        background-color: #ddd;
+        background-color: #eee;
         padding: 0.25em 0.25em 0.25em 0.5em;
         font-size: 150%;
         font-weight: bold;
-        border: solid 1px #aaa;
+        border: solid 1px #ccc;
         vertical-align: middle;
 }
 div#header img#logo {
         float: right;
 }
+div#header a {
+        color: black;
+}
 
 div#content {
         margin: 0.5em 0.5em;
@@ -97,8 +100,7 @@ table.log td {
 
 table.commit-info {
         border-collapse: collapse;
-        margin-top: 1em;
-        
+        margin-top: 1.5em;
 }
 table.commit-info th {
         text-align: left;
@@ -111,14 +113,47 @@ table.commit-info td {
 }
 div.commit-subject {
         font-weight: bold;
-        font-size: 110%;
-        margin: 1em 0em 1em;
+        font-size: 125%;
+        margin: 1.5em 0em 0.5em 0em;
+        padding: 0em;
 }
 div.commit-msg {
         white-space: pre;
-        font-family: courier;
+        font-family: monospace;
+}
+table.diffstat {
+        border-collapse: collapse;
+        margin-top: 1.5em;
+}
+table.diffstat th {
+        font-weight: normal;
+        text-align: left;
+        text-decoration: underline;
+        padding: 0.1em 1em 0.1em 0.1em;
         font-size: 100%;
 }
+table.diffstat td {
+        padding: 0.1em 1em 0.1em 0.1em;
+        font-size: 100%;
+}
+table.diffstat td span.modechange {
+        padding-left: 1em;
+        color: red;
+}
+table.diffstat td.add a {
+        color: green;
+}
+table.diffstat td.del a {
+        color: red;
+}
+table.diffstat td.upd a {
+        color: blue;
+}
+table.diffstat td.summary {
+        /* border-top: solid 1px black; */
+        color: #888;
+        padding-top: 0.5em;
+}
 .sha1 {
         font-family: courier;
         font-size: 90%;
diff --git a/cgit.h b/cgit.h
index 02cc26a..37584d6 100644
--- a/cgit.h
+++ b/cgit.h
@@ -75,6 +75,7 @@ extern void html_txt(char *txt);
 extern void html_attr(char *txt);
 extern void html_link_open(char *url, char *title, char *class);
 extern void html_link_close(void);
+extern void html_filemode(unsigned short mode);
 
 extern int cgit_read_config(const char *filename, configfn fn);
 extern int cgit_parse_query(char *txt, configfn fn);
diff --git a/git.h b/git.h
index a3f977c..922a167 100644
--- a/git.h
+++ b/git.h
@@ -128,6 +128,8 @@ static inline ssize_t xwrite(int fd, const void *buf, size_t len)
 #define MINIMUM_ABBREV 4
 #define DEFAULT_ABBREV 7
 
+extern const unsigned char null_sha1[20];
+
 extern int sha1_object_info(const unsigned char *, char *, unsigned long *);
 
 extern void * read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size);
@@ -136,6 +138,24 @@ extern int get_sha1(const char *str, unsigned char *sha1);
 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
         extern char *sha1_to_hex(const unsigned char *sha1);/* static buffer result! */
 
+static inline int is_null_sha1(const unsigned char *sha1)
+{
+        return !memcmp(sha1, null_sha1, 20);
+}
+static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
+{
+        return memcmp(sha1, sha2, 20);
+}
+static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
+{
+        memcpy(sha_dst, sha_src, 20);
+}
+static inline void hashclr(unsigned char *hash)
+{
+        memset(hash, 0, 20);
+}
+
+
 
 
 /*
@@ -257,6 +277,61 @@ typedef void* (*topo_sort_get_fn_t)(struct commit*);
 
 
 
+/*
+ * from git:diffcore.h
+ */
+
+struct diff_filespec {
+        unsigned char sha1[20];
+        char *path;
+        void *data;
+        void *cnt_data;
+        unsigned long size;
+                int xfrm_flags;          /* for use by the xfrm */
+                unsigned short mode; /* file mode */
+        unsigned sha1_valid : 1; /* if true, use sha1 and trust mode;
+                                  * if false, use the name and read from
+                                  * the filesystem.
+                                  */
+#define DIFF_FILE_VALID(spec) (((spec)->mode) != 0)
+        unsigned should_free : 1; /* data should be free()'ed */
+        unsigned should_munmap : 1; /* data should be munmap()'ed */
+};
+
+struct diff_filepair {
+        struct diff_filespec *one;
+        struct diff_filespec *two;
+        unsigned short int score;
+        char status; /* M C R N D U (see Documentation/diff-format.txt) */
+        unsigned source_stays : 1; /* all of R/C are copies */
+        unsigned broken_pair : 1;
+        unsigned renamed_pair : 1;
+};
+
+#define DIFF_PAIR_UNMERGED(p) \
+        (!DIFF_FILE_VALID((p)->one) && !DIFF_FILE_VALID((p)->two))
+
+#define DIFF_PAIR_RENAME(p) ((p)->renamed_pair)
+
+#define DIFF_PAIR_BROKEN(p) \
+        ( (!DIFF_FILE_VALID((p)->one) != !DIFF_FILE_VALID((p)->two)) && \
+          ((p)->broken_pair != 0) )
+
+#define DIFF_PAIR_TYPE_CHANGED(p) \
+        ((S_IFMT & (p)->one->mode) != (S_IFMT & (p)->two->mode))
+
+#define DIFF_PAIR_MODE_CHANGED(p) ((p)->one->mode != (p)->two->mode)
+
+extern void diff_free_filepair(struct diff_filepair *);
+
+extern int diff_unmodified_pair(struct diff_filepair *);
+
+struct diff_queue_struct {
+        struct diff_filepair **queue;
+        int alloc;
+        int nr;
+};
+
 
 /*
  *  from git:diff.h
@@ -352,6 +427,32 @@ enum color_diff {
 };
 
 
+extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
+                          const char *base, struct diff_options *opt);
+
+extern int diff_root_tree_sha1(const unsigned char *new, const char *base,
+                               struct diff_options *opt);
+
+extern int git_diff_ui_config(const char *var, const char *value);
+extern void diff_setup(struct diff_options *);
+extern int diff_opt_parse(struct diff_options *, const char **, int);
+extern int diff_setup_done(struct diff_options *);
+
+
+extern void diffcore_std(struct diff_options *);
+extern void diff_flush(struct diff_options*);
+
+
+/* diff-raw status letters */
+        #define DIFF_STATUS_ADDED       'A'
+        #define DIFF_STATUS_COPIED      'C'
+        #define DIFF_STATUS_DELETED     'D'
+        #define DIFF_STATUS_MODIFIED    'M'
+        #define DIFF_STATUS_RENAMED     'R'
+        #define DIFF_STATUS_TYPE_CHANGED'T'
+        #define DIFF_STATUS_UNKNOWN     'X'
+        #define DIFF_STATUS_UNMERGED    'U'
+
 
 
 /*
@@ -458,5 +559,10 @@ extern struct commit *get_revision(struct rev_info *revs);
 
 
 
+/* from git:log-tree.h */
+
+int log_tree_commit(struct rev_info *, struct commit *);
+
+
 
 #endif /* GIT_H */
diff --git a/html.c b/html.c
index fab67bd..8a69659 100644
--- a/html.c
+++ b/html.c
@@ -108,3 +108,23 @@ void html_link_close(void)
 {
         html("</a>");
 }
+
+void html_fileperm(unsigned short mode)
+{
+        htmlf("%c%c%c", (mode & 4 ? 'r' : '-'), 
+              (mode & 2 ? 'w' : '-'), (mode & 1 ? 'x' : '-'));
+}
+
+void html_filemode(unsigned short mode)
+{
+        if (S_ISDIR(mode))
+                html("d");
+        else if (S_ISLNK(mode))
+                html("l");
+        else
+                html("-");
+        html_fileperm(mode >> 6);
+        html_fileperm(mode >> 3);
+        html_fileperm(mode);
+}
+
diff --git a/ui-commit.c b/ui-commit.c
index 8916212..c5ee8e7 100644
--- a/ui-commit.c
+++ b/ui-commit.c
@@ -8,6 +8,111 @@
 
 #include "cgit.h"
 
+int files = 0;
+
+void print_filepair(struct diff_filepair *pair)
+{
+        char *query;
+        char *class;
+        
+        switch (pair->status) {
+        case DIFF_STATUS_ADDED:
+                class = "add";
+                break;
+        case DIFF_STATUS_COPIED:
+                class = "cpy";
+                break;
+        case DIFF_STATUS_DELETED:
+                class = "del";
+                break;
+        case DIFF_STATUS_MODIFIED:
+                class = "upd";
+                break;
+        case DIFF_STATUS_RENAMED:
+                class = "mov";
+                break;
+        case DIFF_STATUS_TYPE_CHANGED:
+                class = "typ";
+                break;
+        case DIFF_STATUS_UNKNOWN:
+                class = "unk";
+                break;
+        case DIFF_STATUS_UNMERGED:
+                class = "stg";
+                break;
+        default:
+                die("bug: unhandled diff status %c", pair->status);
+        }
+
+        html("<tr>");
+        htmlf("<td class='mode'>");
+        html_filemode(pair->two->mode);
+        if (pair->one->mode != pair->two->mode) {
+                html("<span class='modechange'>[");
+                html_filemode(pair->one->mode);
+                html("]</span>");
+        }
+        htmlf("</td><td class='%s'>", class);
+                query = fmt("id=%s", sha1_to_hex(pair->two->sha1));
+        html_link_open(cgit_pageurl(cgit_query_repo, "view", query), 
+                       NULL, NULL);
+        if (pair->status == DIFF_STATUS_COPIED || 
+            pair->status == DIFF_STATUS_RENAMED) {
+                html_txt(pair->two->path);
+                htmlf("</a> (%s from ", pair->status == DIFF_STATUS_COPIED ? 
+                      "copied" : "renamed");
+                        query = fmt("id=%s", sha1_to_hex(pair->one->sha1));
+                html_link_open(cgit_pageurl(cgit_query_repo, "view", query), 
+                               NULL, NULL);
+                html_txt(pair->one->path);
+                html("</a>)");
+        } else {
+                html_txt(pair->two->path);
+                html("</a>");
+        }
+        html("<td>");
+
+        //TODO: diffstat graph
+        
+        html("</td></tr>\n");
+                files++;
+}
+
+void diff_format_cb(struct diff_queue_struct *q,
+                    struct diff_options *options, void *data)
+{
+        int i;
+
+        for (i = 0; i < q->nr; i++) {
+                if (q->queue[i]->status == 'U')
+                        continue;
+                print_filepair(q->queue[i]);
+        }
+}
+
+void cgit_diffstat(struct commit *commit)
+{
+        struct diff_options opt;
+        int ret;
+
+        diff_setup(&opt);
+        opt.output_format = DIFF_FORMAT_CALLBACK;
+        opt.detect_rename = 1;
+        opt.recursive = 1;
+        opt.format_callback = diff_format_cb;
+        diff_setup_done(&opt);
+        
+        if (commit->parents)
+                ret = diff_tree_sha1(commit->parents->item->object.sha1,
+                                     commit->object.sha1,
+                                     "", &opt);
+        else
+                ret = diff_root_tree_sha1(commit->object.sha1, "", &opt);
+
+        diffcore_std(&opt);
+        diff_flush(&opt);
+}
+
 void cgit_print_commit(const char *hex)
 {
         struct commit *commit;
@@ -62,5 +167,11 @@ void cgit_print_commit(const char *hex)
         html("<div class='commit-msg'>");
         html_txt(info->msg);
         html("</div>");
+        html("<table class='diffstat'>");
+        html("<tr><th colspan='3'>Affected files</tr>\n");
+        cgit_diffstat(commit);
+        htmlf("<tr><td colspan='3' class='summary'>"
+              "%d file%s changed</td></tr>\n", files, files > 1 ? "s" : "");
+        html("</table>");
         cgit_free_commitinfo(info);
 }